CN112700350B

CN112700350B - A method and device for calculating the coal consumption of power supply affected by heating of a cogeneration unit

Info

Publication number: CN112700350B
Application number: CN202011584439.5A
Authority: CN
Inventors: 刘培栋; 李明; 张鸿泉; 向鹏; 祁超; 李建超; 陈红卫
Original assignee: Rundian Energy Science and Technology Co Ltd
Current assignee: Rundian Energy Science and Technology Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2024-11-22
Anticipated expiration: 2040-12-28
Also published as: CN112700350A

Abstract

The application discloses a method, a device, equipment and a computer-readable storage medium for calculating the coal consumption of heat supply influence and power supply of a cogeneration unit, wherein the method comprises the following steps: acquiring the average load, the heat supply mode and the average heat supply flow of a unit within a preset duration; acquiring a target relation corresponding to the unit average load and the heat supply mode from the heat supply influence power supply coal consumption relation, and calculating the heat supply influence power supply coal consumption by utilizing the target relation and the average heat supply flow; pre-establishing heat supply to affect power supply the coal consumption relation process comprises the following steps: and calculating the heat supply influence power supply coal consumption corresponding to different heat supply flow rates under each power supply coal consumption influence boundary according to the heat supply thermodynamic system model with heat supply, and calculating the heat supply influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to the heat supply influence power supply coal consumption corresponding to each heat supply flow rate under each power supply coal consumption influence boundary. According to the technical scheme disclosed by the application, the quantitative calculation of the heat supply influence power supply coal consumption is realized by establishing the relation in advance and acquiring the target relation from the relation.

Description

Method and device for calculating heat supply influence power supply coal consumption of cogeneration unit

Technical Field

The application relates to the technical field of thermal power generation, in particular to a method, a device and equipment for calculating heat supply influence power supply coal consumption of a cogeneration unit and a computer readable storage medium.

Background

For a thermal power generating unit, standard coal consumption of power generation and power supply is a first economic index of enterprise production and operation, the quantity of the power generation and power supply coal consumption directly influences annual operation achievements of thermal power generating enterprises, and is an index which is most important in calculating annual production cost of enterprises.

For the cogeneration unit, the total standard coal consumption of the whole plant is required to be divided into the power generation coal consumption and the heat supply coal consumption, and the power supply coal consumption is calculated through the heat supply coal consumption, but no quantitative calculation method for influencing the power supply coal consumption by heat supply exists at present, so that the coal-fired cogeneration unit is inconvenient to check the positive and negative balance coal consumption, optimize the heat supply operation mode, select the heat supply transformation method and the like.

In summary, how to realize quantitative calculation on the heat supply influence and the power supply coal consumption is a technical problem to be solved urgently by those skilled in the art at present.

Disclosure of Invention

In view of the above, the present application aims to provide a method, a device, equipment and a computer readable storage medium for calculating the heat supply influence and power supply coal consumption of a cogeneration unit, which are used for realizing quantitative calculation on the heat supply influence and power supply coal consumption.

In order to achieve the above object, the present application provides the following technical solutions:

a heat supply influence power supply coal consumption calculation method of a cogeneration unit comprises the following steps:

Acquiring unit average load, heat supply mode and average heat supply flow of the thermal power unit within a preset time period;

Obtaining a target relation corresponding to the unit average load and the heat supply mode from a pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by using the target relation and the average heat supply flow;

the process for pre-establishing the relation of heat supply, influence and power supply coal consumption comprises the following steps:

Establishing a heating thermodynamic system model corresponding to the thermal power generating unit steam turbine, calculating heating influence power supply coal consumption corresponding to different heating flows under each power supply coal consumption influence boundary by utilizing the heating thermodynamic system model, and respectively calculating a heating influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to the different heating flows under each power supply coal consumption influence boundary and the heating influence power supply coal consumption corresponding to each heating flow; the power supply coal consumption influence boundary comprises unit load and a heat supply mode.

Preferably, the calculating, by using the thermodynamic system model with heat supply, the heat supply influence and the power supply coal consumption corresponding to different heat supply flows under each influence boundary of the power supply coal consumption includes:

Calculating the power generation consumption rate of the turbine under the pure condensation working condition under each power supply coal consumption influence boundary by using the heating thermodynamic system model, and calculating the power generation consumption rate of the turbine under the heating condition corresponding to each heating flow under each power supply coal consumption influence boundary by using the heating thermodynamic system model;

According to the power generation heat consumption rate of the turbine under the pure condensation working condition under each power supply coal consumption influence boundary and the power generation heat consumption rate of the turbine under the heat supply working condition corresponding to each heat supply flow under each power supply coal consumption influence boundary, correspondingly calculating the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary;

And correspondingly calculating the heat supply influence and power supply coal consumption corresponding to the heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by the heat supply corresponding to the heat supply flow under each power supply coal consumption influence boundary.

Preferably, according to different heat supply flows under the influence boundaries of the power supply coal consumption and the heat supply influence power supply coal consumption corresponding to the heat supply flows, the heat supply influence power supply coal consumption relation corresponding to the influence boundaries of the power supply coal consumption is calculated respectively, including:

Calculating a thermoelectric ratio corresponding to each heating flow according to each heating flow;

and correspondingly calculating the heat supply influence and power supply coal consumption relation corresponding to the heat supply flow under the power supply coal consumption influence boundary according to the heat supply influence and power supply coal consumption corresponding to the heat supply flow under the power supply coal consumption influence boundary and the heat electricity ratio corresponding to each heat supply flow.

Preferably, calculating the power generation heat consumption rate of the turbine under the pure condensation condition under each power supply coal consumption influence boundary by using the heating thermodynamic system model comprises the following steps:

calculating the power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption by using the heating thermodynamic system model, and utilizing the power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption Calculating the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption;

The method comprises the following steps of (1) taking HR _c as a power generation heat consumption rate of a pure condensing condition steam turbine, taking W _ms as a main steam flow, taking h _ms as a main steam enthalpy, taking h _fw as a final feedwater enthalpy, taking W _hr as a hot reheat steam flow, taking W _rh as a reheat steam desuperheating water flow, taking h _hr as a hot reheat steam enthalpy, taking h _cr as a cold reheat steam enthalpy, taking W _rh as a reheat steam desuperheating water flow, taking h _rh as a reheat steam desuperheating water enthalpy and taking P _g as a unit load.

Preferably, calculating the power generation rate of the heat supply working condition turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary by using the heating thermodynamic system model with heat supply comprises:

calculating power generation heat consumption rate calculation parameters of the heat supply working condition steam turbines corresponding to the heat supply flow rates under each power supply coal consumption influence boundary by using the heat supply thermodynamic system model, and utilizing the power generation heat consumption rate calculation parameters of the heat supply working condition steam turbines corresponding to the heat supply flow rates under each power supply coal consumption influence boundary Respectively calculating the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary;

The system comprises a heat supply working condition turbine, a heating working condition turbine, a water supply system and a machine load, wherein HR _g is the power generation heat consumption rate of the heat supply working condition turbine, W _ms is the main steam flow, h _ms is the main steam enthalpy, h _fw is the final feedwater enthalpy, W _hr is the hot reheat steam flow, W _rh is the reheat steam desuperheating water flow, h _hr is the hot reheat steam enthalpy, h _cr is the cold reheat steam enthalpy, W _rh is the reheat steam desuperheating water flow, h _rh is the reheat steam desuperheating water enthalpy, E _1o is the heat supply heat of a first heat supply mode, E _1i is the heat supply/return water heat of the first heat supply mode, E _no is the heat supply heat of an nth heat supply mode, E _ni is the heat supply/return water heat of the nth heat supply mode, and P _g is the machine load of the machine unit.

Preferably, according to the power generation heat consumption variation caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary, the power supply coal consumption of each heat supply influence corresponding to each heat supply flow under each power supply coal consumption influence boundary is correspondingly calculated, including:

By means of Correspondingly calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary; wherein Δb _g is the heat supply influence power supply coal consumption corresponding to the heat supply flow, Δhr is the power generation heat consumption change caused by the heat supply corresponding to the heat supply flow, Δhr=hr _c-HR_g, 29307.6 is the heat productivity of the standard coal, η _gl is the boiler efficiency, η _gd is the pipeline efficiency, and η _e is the plant power consumption.

A heat supply influence power supply coal consumption calculation device of a cogeneration unit comprises:

The acquisition module is used for acquiring unit average load, heat supply mode and average heat supply flow of the thermal power unit within a preset time period;

The calculation module is used for acquiring a target relation corresponding to the unit average load and the heat supply mode from a pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by utilizing the target relation and the average heat supply flow;

The system further comprises an establishing module for pre-establishing a relation of heat supply, influence and power supply coal consumption, wherein the establishing module comprises:

The calculation unit is used for establishing a heating thermodynamic system model corresponding to the steam turbine of the thermal power generating unit, calculating heating influence power supply coal consumption corresponding to different heating flow rates under each power supply coal consumption influence boundary, and respectively calculating heating influence power supply coal consumption relations corresponding to each power supply coal consumption influence boundary according to the different heating flow rates under each power supply coal consumption influence boundary and the heating influence power supply coal consumption corresponding to each heating flow rate; the power supply coal consumption influence boundary comprises unit load and a heat supply mode.

Preferably, the calculation unit includes:

The first calculation subunit is used for calculating the power generation and heat consumption rate of the turbine under the pure condensation working condition under each power supply coal consumption influence boundary by using the heat supply thermodynamic system model, and calculating the power generation and heat consumption rate of the turbine under the heat supply flow corresponding to each power supply coal consumption influence boundary by using the heat supply thermodynamic system model;

The second calculation subunit is used for correspondingly calculating the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption rate of the pure condensation working condition steam turbine under each power supply coal consumption influence boundary and the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary;

and the third calculation unit is used for correspondingly calculating the heat supply influence and power supply coal consumption corresponding to the heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by the heat supply corresponding to the heat supply flow under each power supply coal consumption influence boundary.

A cogeneration unit heat supply impact power coal consumption computing device, comprising:

A memory for executing a computer program;

And the processor is used for realizing the steps of the heat supply influence power supply coal consumption calculation method of the cogeneration unit when executing the computer program.

A computer readable storage medium having stored therein a computer program which when executed by a processor implements the steps of the cogeneration unit heating impact power supply coal consumption calculation method of any one of the above.

The application provides a method, a device, equipment and a computer-readable storage medium for calculating the coal consumption of heat supply influence power supply of a cogeneration unit, wherein the method comprises the following steps: acquiring unit average load, heat supply mode and average heat supply flow of the thermal power unit within a preset time period; obtaining a target relation corresponding to the average load and the heat supply mode of the unit from a pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by using the target relation and the average heat supply flow; the process for pre-establishing the relation of heat supply, influence and power supply coal consumption comprises the following steps: establishing a thermodynamic system model with heat supply corresponding to the steam turbine of the thermal power generating unit according to the design working condition of the steam turbine of the thermal power generating unit, calculating the heat supply influence power supply coal consumption corresponding to different heat supply flow rates under each power supply coal consumption influence boundary by utilizing the thermodynamic system model with heat supply, and respectively calculating the heat supply influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to different heat supply flow rates under each power supply coal consumption influence boundary and the heat supply influence power supply coal consumption corresponding to each heat supply flow rate; the power supply coal consumption influence boundary can comprise unit load and heat supply modes.

According to the technical scheme disclosed by the application, a heat-supply thermodynamic system model corresponding to a turbine of a thermal power unit is pre-established, heat-supply influence power supply coal consumption corresponding to different heat supply flow rates under each heat supply coal consumption influence boundary is calculated by utilizing the heat-supply thermodynamic system model, and heat-supply influence power supply coal consumption corresponding to each heat supply coal consumption influence boundary is correspondingly calculated according to different heat supply flow rates under each heat supply coal consumption influence boundary and heat supply influence power supply coal consumption corresponding to different heat supply flow rates, namely, the relation between the heat supply flow rates and the heat supply influence power supply coal consumption under different unit loads and heat supply modes is pre-established, then the unit average load, the heat supply mode and the average heat supply flow rate of the thermal power unit in a preset time period can be obtained, the target relation corresponding to the unit average load and the heat supply mode of the thermal power unit is obtained from the pre-established heat supply influence power supply coal consumption relation, and the average heat supply flow rates are input into the target relation, so that the corresponding heat supply influence power supply coal consumption is calculated, quantitative calculation of the heat supply influence power supply coal consumption is realized, and the heat supply influence power supply coal consumption is conveniently realized, and the heat supply coal consumption is balanced, the heat supply electricity unit is controlled and the heat supply coal consumption is conveniently and the co-fired by the calculated heat influence power supply coal consumption.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a method for calculating heat supply influence power supply coal consumption of a cogeneration unit according to an embodiment of the application;

FIG. 2 is a graph showing the relationship between heat supply flow and heat supply influence and power supply coal consumption in primary industrial heat supply provided by the embodiment of the application;

FIG. 3 is a graph showing the relationship between the thermoelectric ratio and the heat supply influence and power supply coal consumption in primary industrial heat supply provided by the embodiment of the application;

FIG. 4 is a graph showing the relationship between heat supply flow and heat supply influence and power supply coal consumption in secondary industrial heat supply provided by the embodiment of the application;

FIG. 5 is a graph showing the relationship between the thermoelectric ratio and the heat supply influencing and power supply coal consumption in the secondary industrial heat supply provided by the embodiment of the application;

fig. 6 is a schematic structural diagram of a heat supply impact power supply coal consumption calculation device of a cogeneration unit according to an embodiment of the application;

fig. 7 is a schematic structural diagram of a heat supply impact power supply coal consumption calculation device of a cogeneration unit according to an embodiment of the application.

Detailed Description

Specifically, to a cogeneration unit, the total standard coal consumption of the whole plant is required to be divided into the power generation coal consumption and the heat supply coal consumption, and the power supply coal consumption is calculated through the heat supply coal consumption. According to the DLT904 standard of calculation method of technical economic index of thermal power plant, the apportionment method of "benefit return to electricity" makes the coal consumption of heat supply only related to boiler efficiency, pipeline efficiency, and is irrelevant to the grade of the steam supplied, this apportionment method causes the unit to take after heat supply to send out, supply the coal consumption of electricity to reduce by a wide margin. At present, the influence of heat supply on the coal consumption of unit power supply lacks quantitative research, and the energy saving profession of the power plant lacks credible technical support when carrying out the peer-to-peer work of the positive and negative balance coal consumption.

Therefore, the application provides a calculation scheme for the heat supply influence and power supply coal consumption of the cogeneration unit, which is used for realizing quantitative calculation on the heat supply influence and power supply coal consumption.

In order to make the technical solution more clearly understood by those skilled in the art, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Referring to fig. 1, a flowchart of a method for calculating heat supply impact power supply coal consumption of a cogeneration unit according to an embodiment of the present application is shown, where the method for calculating heat supply impact power supply coal consumption of a cogeneration unit according to an embodiment of the present application may include:

S11: establishing a heating thermodynamic system model corresponding to a steam turbine of the thermal power generating unit, and calculating heating influence power supply coal consumption corresponding to different heating flow rates under each power supply coal consumption influence boundary by using the heating thermodynamic system model; the power supply coal consumption influences the boundary including the unit load and the heat supply mode.

It should be noted that, the "heat supply influencing power supply coal consumption" mentioned in the present application refers to the variation (generally, reduction) of the power supply coal consumption of the thermal power generating unit caused by heat supply after adopting the benefit distribution method of "benefit return to electricity", so as to facilitate comparison analysis. In addition, for heat supply, the steam extraction (cold re-heating, four-extraction, five-extraction and the like) and drainage/return water positions of the steam turbine, the external steam supply pressure, the external steam supply temperature and other factors (namely, the factors corresponding to the heat supply mode) can directly influence the reduction degree of the unit power supply coal consumption, and according to analysis, the heat supply mode of the thermal power unit, namely, the heat supply steam extraction and drainage/return water positions are basically determined after the steam turbine is subjected to heat supply transformation, each heat supply mode approximately corresponds to an external heat supply grade, the external steam supply pressure of the grade is basically kept unchanged, and in addition, the heat supply temperature requirements of most users are not high, and generally, the heat supply mode is slightly overheated steam. In the actual steam supply process, the thermal power plant generally divides the heat demand into a plurality of grades such as high pressure, medium pressure, heating and the like, and the heat supply mode of heat supply of each grade under normal operation load is basically determined. In addition, the unit load also influences the power supply coal consumption through heat supply, and the heat supply flow also influences the power supply coal consumption through heat supply.

According to the above process, the heat supply mode, the unit load and the heat supply flow of the thermal power unit are the main factors influencing the coal consumption in the actual heat supply process, and the traditional analysis methods such as the variable dimension is more, the equivalent enthalpy drop and the like are not applicable any more, but the application realizes the quantitative calculation of the heat supply influencing the power supply coal consumption from the three dimensions of the heat supply mode, the unit load and the heat supply flow of the thermal power unit, the method can reflect the heat supply economy of different heat supply modes at the same time, so that the quantitative calculation of the coal consumption of the heat supply and the power supply is influenced by the heat supply, and the method plays a guiding role in the work of checking the positive and negative balance coal consumption, optimizing the heat supply operation mode, selecting the heat supply reconstruction method and the like of the coal-fired cogeneration unit.

Specifically, a model of the thermal system with heat supply can be built according to the design working condition of the turbine of the thermal power unit in a specific thermal power plant or according to actual measurement data obtained by performing performance test on the turbine of the thermal power unit, wherein the design working condition of the turbine of the thermal power unit can be obtained from a thermal equilibrium diagram provided by a turbine manufacturer, and the extraction and drainage/return water positions, the pressure and the temperature of external steam supply of the built model of the thermal system with heat supply are the same as the actual heat supply condition of the thermal power unit.

After the heating thermodynamic system model with heat supply is obtained, the heating influence and power supply coal consumption corresponding to different heat supply flows under each power supply coal consumption influence boundary can be calculated by utilizing the heating thermodynamic system model with heat supply, wherein the power supply coal consumption influence boundary comprises a unit load and a heat supply mode, and the power supply coal consumption influence boundary can be particularly multiple and each power supply coal consumption influence boundary corresponds to multiple different heat supply flows.

S12: and respectively calculating the heat supply influence and power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to different heat supply flows under each power supply coal consumption influence boundary and the heat supply influence and power supply coal consumption corresponding to each heat supply flow.

On the basis of calculating the heat supply influence and power supply coal consumption corresponding to different heat supply flow rates under the power supply coal consumption influence boundary, the heat supply influence and power supply coal consumption relation corresponding to the power supply coal consumption influence boundary can be correspondingly calculated according to the different heat supply flow rates under the power supply coal consumption influence boundary and the heat supply influence and power supply coal consumption corresponding to each heat supply flow rate.

And respectively obtaining the heat supply influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary by carrying out corresponding calculation on each power supply coal consumption influence boundary. It should be noted that, step S12 and step S11 may be performed simultaneously, that is, after each heating-affected power supply coal consumption corresponding to different heating flows under one power supply coal consumption affected boundary is calculated, the heating-affected power supply coal consumption relationship corresponding to the power supply coal consumption affected boundary may be calculated according to the different heating flows under the power supply coal consumption affected boundary and the heating-affected power supply coal consumption corresponding to each heating flow, or step S12 may be performed after step S11, that is, after the heating-affected power supply coal consumption corresponding to the different heating flows under each power supply coal consumption affected boundary is calculated through step S11, the heating-affected power supply coal consumption relationship corresponding to each power supply coal consumption affected boundary is calculated according to the different heating flows under each power supply coal consumption affected boundary and the heating-affected power supply coal consumption corresponding to each heating flow.

The heat supply influence and power supply coal consumption relation corresponding to each of the plurality of power supply coal consumption influence boundaries can be obtained through the step S11 and the step S12, and the heat supply influence and power supply coal consumption relation mentioned in the application can be specifically in a relational expression form or a curve form, and the application is not limited in any way.

In addition, the process of establishing the heat supply influence power supply coal consumption relation in advance is realized through the step S11 and the step S12, and the process can be confirmed in practical application and can be executed only once.

S13: and obtaining the average load, the heat supply mode and the average heat supply flow of the thermal power generating unit within the preset time.

On the basis of pre-establishing a heat supply influence power supply coal consumption relation, when power supply coal consumption calculation is needed for the thermal power generating unit, the unit average load, the heat supply mode and the corresponding average heat supply flow of the thermal power generating unit in a preset time period can be obtained. The preset time length can be specifically 1 day or one month, and the like, and can be specifically set according to the running performance of the thermal power generating unit.

S14: and obtaining a target relation corresponding to the unit average load and the heat supply mode from the pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by utilizing the target relation and the average heat supply flow.

After the average unit load, the heat supply mode and the average heat supply flow rate of the thermal power unit are obtained, a target relation corresponding to the average unit load and the heat supply mode of the thermal power unit in a preset time period can be obtained from the heat supply influence power supply coal consumption relation pre-established based on the step S11 and the step S12, and then the heat supply influence power supply coal consumption corresponding to the average unit load, the heat supply mode and the average heat supply flow rate of the thermal power unit can be calculated according to the target relation and the average heat supply flow rate corresponding to the average unit load and the heat supply mode of the thermal power unit in the preset time period.

The method for calculating the heat supply influence and power supply coal consumption of the cogeneration unit, provided by the embodiment of the application, calculates the heat supply influence and power supply coal consumption corresponding to different heat supply flows under each heat supply coal consumption influence boundary by utilizing a thermodynamic system model with heat supply, and can comprise the following steps:

calculating the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption by using the thermodynamic system model with heat supply, and calculating the power generation heat consumption rate of the turbine under the heat supply working condition corresponding to each heat supply flow under the influence boundary of each power supply coal consumption by using the thermodynamic system model with heat supply;

According to the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption and the power generation heat consumption rate of the turbine under the heat supply working condition corresponding to each heat supply flow under the influence boundary of each power supply coal consumption, correspondingly calculating the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under the influence boundary of each power supply coal consumption;

and correspondingly calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary.

When the heat supply influence power supply coal consumption corresponding to different heat supply flows under each power supply coal consumption influence boundary is calculated by utilizing the heat supply thermodynamic system model, the power generation heat consumption rate of the pure condensation working condition turbine under each power supply coal consumption influence boundary can be calculated by utilizing the established heat supply thermodynamic system model, wherein the power generation heat consumption rate of the pure condensation working condition turbine is only related to the unit load, so that the power generation heat consumption rate of the pure condensation working condition turbine only needs to be calculated once for each power supply coal consumption influence boundary, and the power generation heat consumption rate of the pure condensation working condition turbine can be calculated once for the condition that the unit loads are the same for different power supply coal consumption influence boundaries, so that the frequency of calculating the power generation heat consumption rate of the pure condensation working condition turbine is reduced, the occupation of calculation resources is reduced, and the power generation heat consumption rate of the pure condensation working condition turbine can be calculated once for each power supply coal consumption influence boundary. In addition, the heat supply working condition turbine power generation heat consumption rate corresponding to each heat supply flow under each power supply coal consumption influence boundary can be calculated by using the heat supply thermodynamic system model, namely, the heat supply working condition turbine power generation heat consumption rate corresponding to different heat supply flows under the power supply coal consumption influence boundary is calculated by using the heat supply thermodynamic system model for each power supply coal consumption influence boundary. The application can utilize the established thermodynamic system model with heat supply to perform variable working condition simulation calculation so as to respectively obtain the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence of the power supply coal consumption and the power generation heat consumption rate of the turbine under the heat supply flow corresponding to the influence of the power supply coal consumption.

Based on the calculation, the power generation heat consumption change amount (heat supply influence power generation heat consumption) caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary can be correspondingly calculated according to the power generation heat consumption rate of the turbine under the pure condensation working condition under each power supply coal consumption influence boundary and the power generation heat consumption rate of the turbine under the heat supply working condition corresponding to each heat supply flow, specifically, for each heat supply coal consumption influence boundary, the power generation heat consumption of the turbine under the heat supply working condition corresponding to each heat supply flow can be subtracted by the power generation heat consumption rate of the turbine under the pure condensation working condition corresponding to each heat supply coal consumption influence boundary so as to obtain the power generation heat consumption change amount caused by heat supply corresponding to each heat supply flow under the heat supply coal consumption influence boundary, and then the power generation heat consumption change amount caused by heat supply corresponding to each heat supply flow under the heat supply coal consumption influence boundary is correspondingly calculated.

The above-mentioned heat supply influencing and power supply coal consumption corresponding to each heat supply flow under the various power supply coal consumption influencing boundaries may be performed simultaneously, or after the calculation of the heat supply influencing and power supply coal consumption corresponding to each heat supply flow under one power supply coal consumption influencing boundary is completed, the calculation of the heat supply influencing and power supply coal consumption corresponding to each heat supply flow under another power supply coal consumption influencing boundary may be performed until the calculation of the heat supply influencing and power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influencing boundary is completed.

According to the method for calculating the heat supply influence power supply coal consumption of the cogeneration unit, which is provided by the embodiment of the application, according to different heat supply flows under each power supply coal consumption influence boundary and the heat supply influence power supply coal consumption corresponding to each heat supply flow, the heat supply influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary is calculated respectively, and the method can comprise the following steps:

calculating the thermoelectric ratio corresponding to each heat supply flow according to each heat supply flow;

and correspondingly calculating the heat supply influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary and the thermoelectric ratio corresponding to each heat supply flow.

When the heat supply influence and power supply coal consumption relation corresponding to each power supply coal consumption influence boundary is calculated according to different heat supply flow rates under each power supply coal consumption influence boundary and the heat supply influence and power supply coal consumption corresponding to each heat supply flow rate, the thermoelectric ratio corresponding to each heat supply flow rate can be calculated according to different heat supply flow rates under each power supply coal consumption influence boundary, and the heat supply coal consumption relation can be specifically utilized

Calculating a thermoelectric ratio corresponding to each heat supply flow, wherein Q is the heat supply flow, h _o is the enthalpy of heat supply steam/hot water under the current heat supply mode corresponding to the power supply coal consumption influence boundary, and the unit is kJ/kg; h _i is the heat supply drainage/water supplementing enthalpy corresponding to the power supply coal consumption influence boundary in the current heat supply mode, the unit is kJ/kg, P _g is the current unit load corresponding to the power supply coal consumption influence boundary, eta _e is the plant power consumption rate, and 3600 is the conversion between hours and seconds.

After the thermoelectric ratio corresponding to each heat supply flow is calculated, the heat supply influence and power supply coal consumption relation corresponding to each heat supply coal consumption influence boundary can be correspondingly calculated according to the heat supply influence and power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary and the thermoelectric ratio corresponding to each heat supply flow. Of course, the heat supply influence and power supply coal consumption relation corresponding to each power supply coal consumption influence boundary can be correspondingly calculated directly according to each heat supply flow and heat supply influence and power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary.

Specifically, for each power supply coal consumption influence boundary, a heat supply influence power supply coal consumption relation curve between a heat supply flow rate or a heat supply ratio corresponding to the heat supply flow rate and a heat supply influence power supply coal consumption corresponding to the heat supply flow rate under the power supply coal consumption influence boundary can be drawn, and in a certain heat supply flow rate change range, the heat supply influence power supply coal consumption relation curve can be approximated to be a straight line, so that the following relation can be obtained through relation fitting: Δb _g＝a₁×Q-b₁＝a₂×R-b₂, wherein Δb _g is heat supply influencing power supply coal consumption, Q is heat supply flow rate under the current heat supply mode corresponding to the power supply coal consumption influencing boundary, the unit is t/h, R is thermoelectric ratio under the current heat supply mode corresponding to the power supply coal consumption influencing boundary,%, "a ₁" is heat supply influencing coefficient (heat supply flow rate), b ₁ is throttling deviation (heat supply flow rate), a ₂ is heat supply influencing coefficient (thermoelectric ratio), and b ₂ is throttling deviation (thermoelectric ratio), wherein the heat supply influencing coefficient represents unit heat supply flow rate/thermoelectric ratio-caused unit power supply coal consumption change, the larger the heat supply influencing coefficient is, the better the steam extraction economy is to a certain extent, and throttling of a throttle valve, a rotary partition plate, a middle-row butterfly valve and the like in the description of the throttling deviation b ₁ is reduced.

The method for calculating the heat supply influence power supply coal consumption of the cogeneration unit, provided by the embodiment of the application, calculates the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each kind of power supply coal consumption by using the thermodynamic system model with heat supply, and can comprise the following steps:

Calculating the power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption by using the thermodynamic system model with heat supply, and utilizing the power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption Calculating the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption;

When the heat consumption rate of the turbine under the pure condensation condition under the influence of each power supply coal consumption is calculated by using the thermodynamic system model with heat supply, the heat consumption rate calculation parameter (specifically, the parameters such as W _ms used in a calculation formula) of the turbine under the pure condensation condition under the influence of each power supply coal consumption can be calculated by using the thermodynamic system model with heat supply firstly, and the heat consumption rate calculation parameter of the turbine under the influence of each power supply coal consumption is utilized according to the heat consumption rate calculation parameter of the turbine under the pure condensation condition under the influence of each power supply coal consumption

The power generation heat consumption rate of the pure condensing condition steam turbine under the influence boundary of each power supply coal consumption is calculated respectively, wherein HR _c is the power generation heat consumption rate of the pure condensing condition steam turbine, the unit is kJ/kWh, W _ms is the main steam flow, the unit is t/h, h _ms is the main steam enthalpy, the unit is kJ/kg, h _fw is the final feedwater enthalpy, the unit is kJ/kg, W _hr is the hot reheat steam flow, the unit is t/h, W _rh is the reheat steam desuperheating water flow, the unit is t/h, h _hr is the hot reheat steam enthalpy, the unit is kJ/kg, h _cr is the cold reheat steam enthalpy, the unit is kJ/kg, W _rh is the steam desuperheating water flow, the unit is t/h, h _rh is the reheat steam desuperheating water enthalpy, the unit is kJ/kg, and P _g is the unit load.

The method for calculating the heat supply influence and power supply coal consumption of the cogeneration unit, provided by the embodiment of the application, calculates the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under each heat supply coal consumption influence boundary by using the heat supply thermodynamic system model, and can comprise the following steps:

calculating the power generation heat consumption rate calculation parameters of the heat supply working condition turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary by using the heating thermodynamic system model with heat supply, and utilizing the power generation heat consumption rate calculation parameters of the heat supply working condition turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary Calculating the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under the influence boundary of each power supply coal consumption;

When the heat supply working condition turbine power generation heat consumption rate corresponding to each heat supply flow rate under each power supply coal consumption influence boundary is calculated by using the heat supply thermodynamic system model, the heat supply working condition turbine power generation heat consumption rate calculation parameters (specifically, parameters such as W _ms used in a calculation formula) corresponding to each heat supply flow rate under each power supply coal consumption influence boundary can be calculated by using the heat supply thermodynamic system model, and the heat supply working condition turbine power generation heat consumption rate calculation parameters corresponding to each heat supply flow rate under each power supply coal consumption influence boundary are utilizedAnd respectively calculating the power generation rate of the heat supply working condition steam turbine corresponding to each heat supply flow under the influence boundary of each power supply coal consumption, wherein HR _g is the power generation rate of the heat supply working condition steam turbine, the unit is kJ/kWh, W _ms is the main steam flow, the unit is t/h, h _ms is the main steam enthalpy, the unit is kJ/kg, h _fw is the final feedwater enthalpy, the unit is kJ/kg, W _hr is the heat reheating steam flow, the unit is W _rh is the reheat steam desuperheating water flow, the unit is t/h, h _hr is the heat reheating steam enthalpy, the unit is kJ/kg, h _cr is the cold reheat steam enthalpy, the unit is kJ/kg, W _rh is the reheat steam desuperheating water flow, the unit is t/h, h _rh is reheat steam desuperheating water enthalpy, the unit is kJ/kg, E _1o is the heat supply heat of the first heat supply mode, the unit is the first heat supply mode, the E _no is the MJ/h, the unit is the heat supply mode, the unit is the water supply mode, and the unit is the water supply mode, the water supply mode is the water supply mode, and the unit is the water supply mode is 96.

The method for calculating the heat supply influence power supply coal consumption of the cogeneration unit provided by the embodiment of the application correspondingly calculates the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary, and comprises the following steps:

After the power generation heat consumption rate HR _c of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption and the power generation heat consumption rate HR _g of the turbine under the heat supply working condition corresponding to each heat supply flow under the influence boundary of each power supply coal consumption are obtained through calculation, the delta HR=HR _c-HR_g can be used for calculating the power generation heat consumption change delta HR caused by heat supply corresponding to each heat supply flow under the influence boundary of each power supply coal consumption respectively, and then the power generation heat consumption change delta HR caused by heat supply corresponding to each heat supply flow under the influence boundary of each power supply coal consumption can be used

The corresponding heat supply influence power supply coal consumption delta b _g of each heat supply flow under each power supply coal consumption influence boundary is calculated, the unit is g/kWh,29307.6 is the calorific value of standard coal, the unit is kJ/kg, eta _gl is the boiler efficiency, eta _gd is the pipeline efficiency, eta _e is the plant power consumption, and the unit is%.

It should be noted that, for calculating the heat supply influence and power supply coal consumption relationship corresponding to each power supply coal consumption influence boundary in the above process, the calculation may be performed simultaneously or sequentially, and when the calculation is performed sequentially, the calculation may be specifically performed in the following manner:

Step 1: the method comprises the steps of obtaining unit load and a current heat supply mode, changing the heat supply flow under the heat supply mode, and calculating the power generation heat consumption rate of a turbine under the pure condensation working condition under the unit load by using a thermodynamic system model with heat supply:

calculating the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under the load and the current heat supply mode of the unit by using the thermodynamic system model with heat supply:

Step 2: according to the power generation heat consumption rate of the turbine under the set load and the heat supply working condition corresponding to each heat supply flow under the current heat supply mode, the delta HR=HR _c-HR_g is utilized to correspondingly calculate the power generation heat consumption change quantity (the heat supply affects the power generation heat consumption) caused by the heat supply corresponding to each heat supply flow;

step 3: utilization of power generation heat consumption variation caused by heat supply corresponding to each heat supply flow Respectively calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow;

Step 4: and drawing a heat supply influence and power supply coal consumption relation curve between the heat supply flow or the thermoelectric ratio corresponding to the heat supply flow and the heat supply influence and power supply coal consumption under the unit load and the heat supply mode, wherein the heat supply influence and power supply coal consumption relation curve can be approximately a straight line in a certain heat supply flow change range, so that the following relation can be obtained through relation fitting: Δb _g＝a₁×Q-b₁＝a₂×R-b₂;

Step 5: changing the unit load, taking the changed unit load as a new unit load, and returning to execute the steps 1 to 5 until the calculation of all the unit loads is completed; all the unit loads mentioned here may be, in particular, a plurality of unit loads divided according to the unit load conditions of the thermal power unit.

Step 6: and (3) changing the current heat supply mode, taking the changed current heat supply mode as a new heat supply mode, and returning to execute the steps 1 to 6 until the calculation of each power supply mode in the thermal power generating unit is completed.

Of course, the order of calculation of the unit load and the heating pattern may be modified.

In order to explain the application in more detail, taking a 2X 350MW unit steam turbine of a certain power plant as a supercritical, one-time intermediate reheating, single-shaft, three-cylinder two-exhaust steam turbine, double-extraction section type heat supply and wet condensing steam turbine as an example, wherein the steam turbine is provided with two heat supply modes with different parameter grades, specifically, the two heat supply modes are divided into a first-stage industrial heat supply mode and a second-stage industrial heat supply mode, wherein the first-stage industrial heat supply mode adopts cold remixing and heat remixing and then directly externally supplies, the heat supply pressure is 3.8MPa.a, the heat supply flow fluctuates in the range of 20-60t/h, the step length 20t/h is calculated, the steam extraction source of the second-stage industrial heat supply mode is the steam turbine 3-stage extraction steam, the steam is supplied after water injection is reduced in temperature, the heat supply pressure is 2.3MPa.a through the opening control flow of three industrial extraction seat cylinder valves at the upper part of the middle-pressure outer cylinder, the heat supply flow fluctuates in the range of 100-200t/h, and the step length 50t/h is calculated.

And establishing a thermodynamic system model with heat supply according to the thermal equilibrium diagram of the turbine of the power plant and the actual steam supply configuration of the unit. And the heat regeneration systems of the model are all arranged according to the actual conditions of the unit.

Model boundary conditions: the back pressure of the unit is 5.3kPa; and supplying heat and supplementing water to the condenser, wherein the water supplementing temperature is 20 ℃.

The constant running load interval of the unit is 240-300MW, and the calculated step length is 30MW.

The quantitative calculation result of the coal consumption of the heat supply influencing unit power supply in the primary industrial heat supply mode is shown in the following table:

TABLE 1 Power supply coal consumption parameter Table for heat supply influencing unit in primary industrial heat supply mode

According to the calculation result, a normal operation load interval of the unit is drawn, the relation between the primary industrial heat supply flow/thermoelectric ratio and the power supply coal consumption can be specifically seen in fig. 2 and 3, wherein fig. 2 is a relation chart between the heat supply flow and the heat supply influence power supply coal consumption in the primary industrial heat supply, fig. 3 is a relation chart between the thermoelectric ratio and the heat supply influence power supply coal consumption in the primary industrial heat supply, the abscissa is the heat supply flow (t/h) in fig. 2, the ordinate is the heat supply influence power supply coal consumption reduction value (g/kWh), (the negative value indicates that the power supply coal consumption is increasing), the abscissa is the thermoelectric ratio (%) in fig. 3, and the ordinate is the heat supply influence power supply coal consumption reduction value (g/kWh).

Fitting the relation curve can obtain a unitary linear function, taking a coal consumption curve of the power supply, which is influenced by the steam supply flow under the load of 270MW, as an example: supply coal consumption reduction value= 0.1408 heat supply flow-2.8397 (g/kWh), the heat supply influence coefficient is 01408, the throttling deviation is 2.8397, under 270MW load, the heat supply flow changes by 1t/h, the unit supply coal consumption is reduced by about 0.1408g/kWh, but the total influence quantity is reduced by 2.8397g/kWh due to the influence of throttle in the unit.

The quantitative calculation result of the coal consumption of the heat supply influencing unit power supply in the secondary industrial heat supply mode is shown in the following table:

Table 2 table of coal consumption parameters for heat supply influencing unit power supply in two-stage industrial heat supply mode

According to simulation calculation results, the relation of the change of the secondary industrial steam supply flow rate and the thermoelectric ratio power supply coal consumption is drawn, and particularly, reference can be made to fig. 4 and 5, wherein fig. 4 is a relation diagram between the heat supply flow rate and the heat supply influence power supply coal consumption in secondary industrial heat supply, fig. 5 is a relation diagram between the thermoelectric ratio and the heat supply influence power supply coal consumption in secondary industrial heat supply, the abscissa in fig. 4 is the heat supply flow rate (t/h), the ordinate is the heat supply influence power supply coal consumption reduction value (g/kWh), the value is negative, the power supply coal consumption is indicated to be increased, the abscissa in fig. 5 is the thermoelectric ratio (%), and the ordinate is the heat supply influence power supply coal consumption reduction value (g/kWh).

Taking the running data of the project #1 machine 2020 month 1 as an example: and the average electric load 281MW of the #1 unit is about, and the unit power supply coal consumption 319.96g/kWh under the pure condensation working condition is obtained through a consumption difference analysis method. The primary and the secondary are 33.2t/h and 154.6t/h respectively, and are calculated by respective heat supply influence coal consumption coefficient and throttling deviation, so that the power supply coal consumption of the unit is respectively influenced by 2.44g/kWh and 14.58g/kWh, and the total power supply coal consumption is influenced by 17.02g/kWh. The actual power supply coal consumption of the unit in the current month is 319.96-17.02= 302.94g/kWh.

The embodiment of the application also provides a device for calculating the heat supply influence and the power supply coal consumption of the cogeneration unit, referring to fig. 6, which shows a schematic structural diagram of the device for calculating the heat supply influence and the power supply coal consumption of the cogeneration unit, which can include:

The obtaining module 62 is configured to obtain a unit average load, a heat supply mode and an average heat supply flow of the thermal power unit within a preset duration;

The calculating module 63 is configured to obtain a target relationship corresponding to an average load and a heat supply mode of the unit from a pre-established heat supply influence power supply coal consumption relationship, and calculate a corresponding heat supply influence power supply coal consumption by using the target relationship and the average heat supply flow;

The building module 61 may be further configured to pre-build a relation between heat supply and power supply coal consumption, where the building module 61 may include:

the calculation unit is used for establishing a heating thermodynamic system model corresponding to the steam turbine of the thermal power generating unit, calculating the heating influence power supply coal consumption corresponding to different heating flow rates under each power supply coal consumption influence boundary by using the heating thermodynamic system model, and respectively calculating the heating influence power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to the different heating flow rates under each power supply coal consumption influence boundary and the heating influence power supply coal consumption corresponding to each heating flow rate; the power supply coal consumption influence boundary can comprise unit load and heat supply modes.

The embodiment of the application provides a heat supply influence power supply coal consumption calculation device of a cogeneration unit, wherein a calculation unit can comprise:

The first calculation subunit is used for calculating the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption by using the thermodynamic system model with heat supply, and calculating the power generation heat consumption rate of the turbine under the heat supply working condition corresponding to each heat supply flow under the influence boundary of each power supply coal consumption by using the thermodynamic system model with heat supply;

The second calculation subunit is used for correspondingly calculating the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption rate of the pure condensation working condition turbine under each power supply coal consumption influence boundary and the power generation heat consumption rate of the heat supply working condition turbine corresponding to each heat supply flow under each power supply coal consumption influence boundary;

and the third calculation unit is used for correspondingly calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary.

The embodiment of the application provides a heat supply influence power supply coal consumption calculation device of a cogeneration unit, and the calculation unit can further comprise:

A fourth calculation unit for calculating a thermoelectric ratio corresponding to each heating flow according to each heating flow;

And the fifth calculation unit is used for correspondingly calculating the heat supply influence and power supply coal consumption relation corresponding to each power supply coal consumption influence boundary according to the heat supply influence and power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary and the thermoelectric ratio corresponding to each heat supply flow.

The device for calculating the coal consumption of the heat supply influence and the power supply of the cogeneration unit, provided by the embodiment of the application, the first calculating subunit can comprise:

The first power generation heat consumption calculation unit is used for calculating power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption by using the heating thermodynamic system model, and utilizing the power generation heat consumption rate calculation parameters of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption Calculating the power generation heat consumption rate of the turbine under the pure condensation working condition under the influence boundary of each power supply coal consumption;

The second power generation heat consumption calculation unit is used for calculating power generation heat consumption rate calculation parameters of the heat supply working condition steam turbine corresponding to each heat supply flow under the influence boundary of each power supply coal consumption by using the heat supply thermodynamic system model, and utilizing the power generation heat consumption rate calculation parameters of the heat supply working condition steam turbine corresponding to each heat supply flow under the influence boundary of each power supply coal consumption Calculating the power generation heat consumption rate of the heat supply working condition steam turbine corresponding to each heat supply flow under the influence boundary of each power supply coal consumption;

The embodiment of the application provides a heat supply influence power supply coal consumption calculation device of a cogeneration unit, and a third calculation unit may include:

heat supply influencing and power supply coal consumption calculating unit for utilizing Correspondingly calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary; wherein Δb _g is the heat supply influence power supply coal consumption corresponding to the heat supply flow, Δhr is the power generation heat consumption change caused by the heat supply corresponding to the heat supply flow, Δhr=hr _c-HR_g, 29307.6 is the heat productivity of the standard coal, η _gl is the boiler efficiency, η _gd is the pipeline efficiency, and η _e is the plant power consumption.

The embodiment of the application also provides a heat and power cogeneration unit heat supply influence power supply coal consumption calculation device, referring to fig. 7, which shows a schematic structural diagram of the heat and power supply coal consumption calculation device of the heat and power cogeneration unit provided by the embodiment of the application, and the heat and power supply coal consumption calculation device can comprise:

A memory 71 for executing a computer program;

the processor 72, when executing the computer program stored in the memory 71, may implement the following steps:

Acquiring unit average load, heat supply mode and average heat supply flow of the thermal power unit within a preset time period; obtaining a target relation corresponding to the average load and the heat supply mode of the unit from a pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by using the target relation and the average heat supply flow; the process for pre-establishing the relation of heat supply, influence and power supply coal consumption comprises the following steps: establishing a heating thermodynamic system model corresponding to a steam turbine of a thermal power generating unit, calculating heating influence power supply coal consumption corresponding to different heating flows under each power supply coal consumption influence boundary by using the heating thermodynamic system model, and respectively calculating heating influence power supply coal consumption relations corresponding to each power supply coal consumption influence boundary according to the different heating flows under each power supply coal consumption influence boundary and the heating influence power supply coal consumption corresponding to each heating flow; the power supply coal consumption influence boundary can comprise unit load and heat supply modes.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps can be realized:

Acquiring unit average load, heat supply mode and average heat supply flow of the thermal power unit within a preset time period; obtaining a target relation corresponding to the average load and the heat supply mode of the unit from a pre-established heat supply influence power supply coal consumption relation, and calculating the corresponding heat supply influence power supply coal consumption by using the target relation and the average heat supply flow; the process for pre-establishing the relation of heat supply, influence and power supply coal consumption comprises the following steps: establishing a heating thermodynamic system model corresponding to a steam turbine of a thermal power generating unit, calculating heating influence power supply coal consumption corresponding to different heating flow rates under each power supply coal consumption influence boundary by using the heating thermodynamic system model, and respectively calculating heating influence power supply coal consumption relations corresponding to each power supply coal consumption influence boundary according to the different heating flow rates under each power supply coal consumption influence boundary and the heating influence power supply coal consumption corresponding to each heating flow rate; the power supply coal consumption influence boundary can comprise unit load and heat supply modes.

The computer readable storage medium may include: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The description of the relevant parts in the device and the equipment for calculating the heat supply influence power supply coal consumption of the cogeneration unit and the computer readable storage medium provided by the embodiment of the application can be referred to the detailed description of the corresponding parts in the method for calculating the heat supply influence power supply coal consumption of the cogeneration unit provided by the embodiment of the application, and the detailed description is omitted herein.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is inherent to. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. In addition, the parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of the corresponding technical solutions in the prior art, are not described in detail, so that redundant descriptions are avoided.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a cogeneration unit heat supply influences power supply coal consumption calculation method which is characterized by comprising the following steps:

Based on computer thermodynamic system modeling simulation software, a thermodynamic system model with heat supply is established according to the design working condition of the thermal power unit steam turbine; or establishing the thermodynamic system model with heat supply according to measured data obtained by performing performance test on the thermal power unit steam turbine; the design working conditions of the thermal power unit steam turbine are obtained according to a thermal equilibrium diagram provided by a steam turbine manufacturer, and the steam extraction and drainage/return water positions, the external steam supply pressure and the external steam supply temperature of the established thermal power unit thermodynamic system model are the same as those of the thermal power unit actual heat supply condition;

According to the generated power generation heat consumption variation caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary, correspondingly calculating the heat supply influence power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary;

According to the heat supply influence power supply coal consumption corresponding to the heat supply flow under the power supply coal consumption influence boundary and the thermoelectric ratio corresponding to each heat supply flow, correspondingly calculating the heat supply influence power supply coal consumption relation corresponding to the power supply coal consumption influence boundary; the power supply coal consumption influence boundary comprises a unit load and a heat supply mode;

wherein, still include: determining a heat supply influence power supply coal consumption relation curve according to the heat supply flow or the thermoelectric ratio corresponding to the heat supply flow and the heat supply influence power supply coal consumption;

The expression of the heat supply influence and power supply coal consumption relation curve is as follows: Δb _g＝a₁×Q-b₁＝a₂×R-b₂;

The heat supply influence and power supply coal consumption is represented by delta b _g, the heat supply influence coefficient corresponding to the heat supply flow is represented by a ₁, the throttling deviation of the heat supply flow is represented by b ₁, the heat supply flow is represented by Q, the heat supply influence coefficient corresponding to the thermoelectric ratio is represented by a ₂, and the throttling deviation of the heat supply flow is represented by b ₂.

2. The method for calculating heat supply influence power supply coal consumption of a cogeneration unit according to claim 1, wherein calculating the power generation heat consumption rate of the turbine under the pure condensation condition under each heat supply coal consumption influence boundary by using the heat supply thermodynamic system model comprises:

3. The method for calculating the heat supply influence power supply coal consumption of the cogeneration unit according to claim 2, wherein calculating the power generation heat consumption rate of the heat supply condition steam turbine corresponding to each heat supply flow under each heat supply coal consumption influence boundary by using the heat supply thermodynamic system model comprises:

4. The method for calculating the heat supply influence and power supply coal consumption of a cogeneration unit according to claim 3, wherein the calculating the heat supply influence and power supply coal consumption corresponding to each heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption variation caused by heat supply corresponding to each heat supply flow under each power supply coal consumption influence boundary comprises the following steps:

5. The utility model provides a cogeneration unit heat supply influences power supply coal consumption calculation device which characterized in that includes:

a computing unit, the computing unit comprising:

The first calculation subunit is used for establishing a thermodynamic system model with heat supply according to the design working condition of the thermal power unit steam turbine based on computer thermodynamic system modeling simulation software; or establishing the thermodynamic system model with heat supply according to measured data obtained by performing performance test on the thermal power unit steam turbine; the design working conditions of the thermal power unit steam turbine are obtained according to a thermal equilibrium diagram provided by a steam turbine manufacturer, and the steam extraction and drainage/return water positions, the external steam supply pressure and the external steam supply temperature of the established thermal power unit thermodynamic system model are the same as those of the thermal power unit actual heat supply condition; calculating the power generation consumption rate of the turbine under the pure condensation working condition under each power supply coal consumption influence boundary by using the heating thermodynamic system model, and calculating the power generation consumption rate of the turbine under the heating condition corresponding to each heating flow under each power supply coal consumption influence boundary by using the heating thermodynamic system model;

The third calculation unit is used for correspondingly calculating the heat supply influence power supply coal consumption corresponding to the heat supply flow under each power supply coal consumption influence boundary according to the power generation heat consumption change quantity caused by the heat supply corresponding to the heat supply flow under each power supply coal consumption influence boundary; calculating a thermoelectric ratio corresponding to each heating flow according to each heating flow; according to the heat supply influence power supply coal consumption corresponding to the heat supply flow under the power supply coal consumption influence boundary and the thermoelectric ratio corresponding to each heat supply flow, correspondingly calculating the heat supply influence power supply coal consumption relation corresponding to the power supply coal consumption influence boundary; the power supply coal consumption influence boundary comprises a unit load and a heat supply mode;

6. A cogeneration unit heat supply impact power supply coal consumption computing device, comprising:

A memory for executing a computer program;

a processor for implementing the steps of the cogeneration unit heat supply impact power supply coal consumption calculation method according to any one of claims 1 to 4 when executing the computer program.

7. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a computer program which, when executed by a processor, implements the steps of the cogeneration unit heating impact power supply coal consumption calculation method according to any one of claims 1 to 4.