CN102410592B - Combined refrigeration system by fuel gas combined cycle and solar power generation and scheduling method thereof - Google Patents

Abstract

The invention discloses a gas combined cycle and solar power generation combined refrigeration system and its dispatching method. The user adopts two methods of centralized heat absorption refrigerator and air conditioner for cooling, and the cold water comes from the heat of the gas combined cycle unit. After the water is output, it is converted by the centralized heat absorption refrigerator, and the power is jointly provided by the combined cycle unit and the solar power generation unit. Under the conditions of ensuring the power supply and cooling supply, the heat supplied to the refrigeration centralized heat absorption refrigerator is reduced. The water flow is compensated by the power consumption for cooling, and its power generation output changes accordingly, and the supply is met by coordinating with solar power generation according to the change of power load. The fluctuation of solar power generation is adjusted to the output of thermal power and the change of user's power consumption load, with equal detection cycle and adjustment cycle, so as to realize the equivalent smooth output of solar power generation on the user side.

Description

Gas Combined Cycle and Solar Power Combined Refrigeration System and Its Scheduling Method

technical field

The invention belongs to the technical field of comprehensive utilization of clean energy, and relates to a gas combined cycle and solar power combined refrigeration system and a scheduling method thereof.

Background technique

Renewable energy has the characteristics of green and clean, and has developed rapidly in recent years. However, taking solar power generation as an example, while solar power generation provides clean and low-carbon energy, the large-scale grid connection of solar farms also has a negative impact on the safe and economic operation of the power grid. After the large-scale solar farm is connected to the grid, its output fluctuates greatly, and the power fluctuation is often opposite to the fluctuation trend of the electricity load. The anti-peak-shaving characteristics of solar power generation will further expand the peak-to-valley difference of the system, increase the difficulty of grid dispatching, and have a series of impacts on grid dispatching operation, voltage control, and grid peak regulation. Due to the imperfection of relevant research, the phenomenon of energy abandonment is serious.

Contents of the invention

The problem to be solved by the present invention is to provide a gas combined cycle and solar power generation combined refrigeration system and its dispatching method, through the comprehensive regulation of thermal energy and electric energy, the smooth output of solar power generation can be realized, and the effective utilization of solar power generation can be improved.

The present invention is achieved through the following technical solutions:

A gas combined cycle and solar power combined refrigeration system, comprising:

Gas-fired heating boilers and gas-fired combined cycle units for generating electricity and hot water for cooling;

Centralized heat absorption chiller, the input end is connected to the hot water outlet of the gas heating boiler and the gas combined cycle unit, cold water is generated after heat exchange, and the output end is connected to the cooling pipeline;

Solar generators used to generate electricity;

The user's air conditioner connected in parallel with the gas heating boiler, gas combined cycle unit and solar generator set through the power cable network; the remote control switch of the air conditioner for controlling the air conditioner;

The electric meter that collects the user's non-cooling power consumption;

The cooling fan coil of the user connected to the centralized heat absorption refrigerator through the cooling pipeline; the cooling water consumption meter of the cooling fan coil detects the cold water consumption of the cooling fan coil; the cooling fan coil of the cooling fan coil is controlled Tube remote control switch;

The first remote centralized controller collects the production capacity information of gas heating boilers and gas combined cycle units, including the hot water flow for cooling and power generation output, and transmits the collected production capacity information to the comprehensive dispatching control device; the first remote centralized controller It also receives the scheduling control signal sent by the integrated scheduling control device, and controls the action of the gas heating boiler and the gas combined cycle unit control actuator according to the scheduling control signal;

The second remote centralized controller collects the production capacity information of the power generation output of the solar generator set, and transmits the collected production capacity information to the comprehensive dispatching control device;

The third remote centralized controller records the pipe distance information between the user’s cooling fan coil unit and the centralized heat absorption refrigerator, and collects the user’s non-refrigerating electricity consumption and cooling water consumption meter detection of the cooling fan coil unit The energy consumption information of the cold water inflow received; the user's pipeline distance information and collected energy consumption information are transmitted to the comprehensive dispatching control device;

The third remote centralized controller also receives the scheduling control signal sent by the integrated scheduling control device, and drives the remote control switch of the air conditioner and/or the remote control switch of the refrigeration fan coil unit to perform actions according to the scheduling control signal;

The comprehensive dispatching control device generates regulation and control signals according to the received capacity information, user's pipeline distance information and energy consumption information, and sends regulation and control signals to the first remote centralized controller and/or the third remote centralized controller.

According to the received production capacity information of gas-fired heating boilers, gas-fired combined cycle units, solar generator sets and energy consumption information of users, the comprehensive dispatching control device reduces the consumption of gas-fired heating boilers and gas The combined cycle unit supplies the hot water flow for cooling by the centralized heat absorption refrigerator, and the reduction of the hot water flow for cooling leads to the lack of cooling required by the user to be compensated by the power consumption of the air conditioner for cooling;

The comprehensive scheduling control device sends out the regulation and control of the hot water flow for cooling and power generation output of the gas heating boiler and the gas combined cycle unit at the scheduling time, the amount of cold water flowing into the cooling fan coil of the user and the cooling power consumption of the air conditioner Signal.

The integrated dispatch control device includes:

The first data receiving unit that receives the production capacity information of the gas heating boiler, the gas combined cycle unit and the solar power generation unit, the user’s energy consumption information and the user’s pipeline distance information;

a data decoder unit that decodes all received data;

a data memory unit storing all decoded data;

a dispatch control signal calculation unit generating a dispatch control signal;

a signal encoder for encoding the dispatch control signal; and

The encoded scheduling control signal is transmitted to the sending units of the first remote centralized controller and the third remote centralized controller.

The integrated dispatch control device is connected to the cloud computing service system through the power optical fiber, and drives the calculation of the cloud computing service system to obtain the dispatch control signal; the comprehensive dispatch control device receives the dispatch control signal obtained by the cloud computing service system through the power optical fiber, and then transmits Or transmit the scheduling control signal to the first remote centralized controller and/or the third remote centralized controller in a wireless transmission manner.

The remote control switch of the refrigeration fan coil unit is coupled with the comprehensive dispatching control device by remote control through the third remote centralized controller; the remote control switch of the air conditioner is coupled with the comprehensive dispatching control device by remote control through the third remote centralized controller; There is also a special electric energy meter on the air conditioner to detect the power consumption of its refrigeration, and the power consumption is collected by the third remote centralized controller;

The control execution device of the gas heating boiler and the gas combined cycle unit is coupled with the comprehensive scheduling control device in a remote manner through the first remote centralized controller; the control execution device of the gas heating boiler and the gas combined cycle unit performs actions according to the dispatch control signal.

The third remote centralized controller includes an unrefrigerated electric meter pulse counter, a refrigerated cold water flow pulse counter, a pulse signal code converter, a measurement signal amplification transmitter, and an interconnected control signal receiving decoder and a remote control signal generator;

The pulse counter of the unrefrigerated electric meter is connected to the non-refrigerated electric meter of the user to detect the non-refrigerated power consumption data of the user. The non-refrigerated electric power consumption data of the user is processed by the pulse signal code converter and the metering signal amplifier transmitter and then sent to the comprehensive dispatching control device;

The refrigeration cold water flow pulse counter is connected to the refrigeration fan coil cold water consumption meter to detect the inflow of cold water, and the inflow of cold water is processed by the pulse signal code converter and the metering signal amplifier transmitter to generate a signal, which is transmitted to the comprehensive Dispatch control device;

The control signal receiving decoder receives and decodes the scheduling control information sent by the integrated scheduling control device, and then sends the control signal to the remote control switch of the air conditioner and the remote control switch of the refrigeration fan coil unit through the control signal remote transmitter to perform actions.

The scheduling method of the gas combined cycle and solar power combined refrigeration system includes the following steps:

In the time period from 0 to T×ΔT, ΔT is the sampling period, and T is the number of collections. The integrated dispatching control device predicts the future period T ~2T×ΔT production capacity information, combined with the user’s energy consumption information within the 0~T×ΔT time period, under the condition of ensuring the power supply and cooling supply, reduce the centralized heat absorption of gas heating boilers and gas combined cycle units The flow of hot water refrigerated by the type refrigerator, reducing the flow of cold water leads to insufficient cooling required by the user, which is compensated by the power consumption of the air conditioner for cooling, and the supplementary amount is calculated by considering the time when the cold water flows to the user;

Then, in the T～2T×ΔT time period, the comprehensive dispatching control device takes ΔT as the control cycle, generates and sends dispatching control signals according to the prediction and dispatching calculation of power supply and cooling supply, and the first remote centralized controller receives the dispatching control signals and then controls The hot water flow for cooling and power generation output of the gas heating boiler and the gas combined cycle unit. After receiving the scheduling control signal, the third remote centralized controller controls the power consumption of the air conditioner for cooling to compensate for the cooling caused by the reduction of cold water used by the cooling fan coil. insufficient.

The generation of the dispatch control signal of the integrated dispatch control device includes the following steps:

1) Collect variables:

1.1) Collect the combined cycle electrical output P _COMB (t) of the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0～T×ΔT, and supply the heat output H _COMB (t) of the combined cycle of the centralized heat absorption refrigerator and The heat output H _BOIL (t) of the gas-fired heating boiler is sent to the comprehensive dispatching control device; ΔT is the sampling period, T is the number of collections, and T is a natural number;

并发送到综合调度控制装置；Collect the power generation output of 0~M solar generators in the time period of 0~T×ΔT

And sent to the integrated dispatching control device;

1.2) Collect the following information of 0-N users within the time period of 0-T×ΔT: the distance S _i between the user and the pipeline of the centralized heat absorption refrigerator, the non-cooling power consumption P _i (t), the cooling fan panel Tube consumption H _i (t) for refrigeration and installed capacity of air conditioner And sent to the integrated dispatching control device;

2) Calculate the following variables:

然后根据总出力

利用统计分析方法，预测T～2T×ΔT时间段的太阳能发电机总出力P_sum(t)；2.1) Calculate the total output of the solar generator in the time period of 0～T×ΔT

Then according to the total output

Predict the total output of solar generators P _sum (t) in the time period of T～2T×ΔT by means of statistical analysis;

The thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption chiller by the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0～T×ΔT, and the thermal output H _BOIL (t) of the gas-fired heating boiler and the combined cycle electric output P _COMB (t), predict the thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption refrigerator and the thermal output H _BOIL ( t) and combined cycle electric output P _COMB (t);

v为冷水在管道中的流速；并对将计算结果做取整运算

2.2) Calculate the equivalent distance from each user to the centralized heat absorption refrigerator

v is the flow velocity of cold water in the pipeline; and round the calculation result

Divide users with the same s _i into the same group, count as the lth group, s _i =l; add up to L groups, L is a natural number;

For each user group, calculate the total cooling load H _load (l) and air conditioner capacity P _EHP (l) of all users in each group;

H _load (l)=∑H _i (t, l), H _i (t, l) is the cooling load of user i in group l at time t;

为第l组用户i的空调器容量；

is the air conditioner capacity of user i in group l;

3) Substituting P _Comb (t), H _COMB (t), H _Boil (t), P _load (t), H _load (l) and P _EHP (l), the objective function (1) and constraints ( 2-10) Composing the optimization problem for iterative solution to obtain the minimum value of the objective function as a result, and obtaining each variable as a control signal:

3.1) The objective function is:

Min: $\mathrm{\Δp}=\sqrt{\underset{t=T}{\overset{2T}{\mathrm{\Σ}}}{(p_{p_v}\left(t\right)-{\stackrel{\‾}{p}}_{\mathrm{PV}})}^2/(T+1)};---\left(1\right)$

为等效太阳能发电出力平均值，其表达式分别如下：where p _pv (t) is the adjusted total output of equivalent solar power,

is the average value of equivalent solar power output, and its expressions are as follows:

p _pv (t)＝P _pv (t)+(p _ComB (t)-P _ComB (t))-p _EHPs (t) (2)

Among them, p _ComB (t) is the power generation output of the adjusted combined cycle unit, and P _COMB (t) is the power consumption of all user heat pumps when the predicted combined cycle electric output p _EHPs (t) is t;

${\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; p</span>}}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

3.2) Constraints

3.2.1) Cooling load balance equation

Reduce the cooling water output, and the insufficient cooling power on the supply side is Δh(t), and its expression is as follows:

Δh(t)=H _COMB (t)-h _COMB (t)+H _Boil (t)-h _Boil (t); (4)

Among them, H _COMB (t) is the predicted heat output of the combined cycle supplied to the centralized heat absorption refrigerator, and H _BOIL (t) is the predicted heat output of the gas-fired heating boiler supplied to the centralized heat absorption refrigerator , h _COMB (t) is the heat output supplied by the adjusted combined cycle to the centralized heat absorption refrigerator, h _Boil (t) is the heat output supplied to the centralized heat absorption refrigerator by the gas heating boiler;

Considering the time for cold water to flow into the user in the pipeline, the compensation Δh(t) required by the user to use the air conditioner is expressed as:

$\mathrm{\&Delta;h}\left(t\right)=\underset{l=0}{\overset{L}{\mathrm{\&Sigma;}}}{h}_{\mathrm{EHP}}(t+l,l);$ (T≤t+l≤2T) (5)

h _EHP (t+l, l) is the sum of the cooling power of the user air conditioners in group l at time t+l;

3.2.2) Constraints of gas heating boiler and gas combined cycle unit:

h _COMB (t) = f _COMB (t) η ^q _ComB ; (6)

${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&Center\; Dot;</span>{\mathrm{<span\; class="notranslate">\; \&eta;</span>}}_{\mathrm{<span\; class="notranslate">\; ComB</span>}}^{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$

为联合循环热效率；

为联合循环发电效率；h_COMB(t)调节后联合循环供给集中式热吸收式制冷机的热出力，p_Comb(t)为调节后联合循环的电出力，f_COMB(t)为调节后联合循环的功率能耗；in,

is the thermal efficiency of the combined cycle;

is the power generation efficiency of the combined cycle; h _COMB (t) is the heat output of the centralized heat absorption refrigerator supplied by the adjusted combined cycle, p _Comb (t) is the electric output of the adjusted combined cycle, f _COMB (t) is the adjusted combined cycle Cycle power consumption;

3.2.3) User-side air conditioner constraints

Thermoelectric ratio constraints: h _EHP (t, l) = COP _EHP p _EHP (t, l) (8)

h _EHP (t, l) is the sum of the cooling power of the user's air conditioner in group l at time t, and COP _EHP is the coefficient of performance of the air conditioner;

Output upper limit: 0≤p _EHP (t, l)≤min(P _EHP (l), H _load (l)/COP _EHP ); (9)

The sum of the air conditioner power consumption of all user groups in each period:

${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHPs</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; L</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHP</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 10</span>}<span\; class="notranslate">\; )</span>$

4) The integrated scheduling control device generates scheduling control signals according to the adjusted variables in the calculation results and sends out:

The combined cycle of the gas heating boiler and the gas combined cycle unit is supplied to the heat output h _COMB (t) of the centralized heat absorption refrigerator, the electric output p _Comb (t) of the combined cycle, and the gas heating boiler is supplied to the centralized heat absorption refrigeration The thermal output h _Boil (t) of the machine is sent to the first remote centralized controller to control its actions in each period of future adjustment time;

Send the power consumption p _EHP (t, l) and the cooling capacity h _EHP (t, l) of the user's air conditioner to the third remote centralized controller to control its actions in each period of the future adjustment time.

Compared with the prior art, the present invention has the following beneficial technical effects:

The combined refrigeration system of gas-fired combined cycle and solar power generation and its scheduling method provided by the present invention is a system based on gas-fired combined cycle unit and cooling load management of solar (photovoltaic) power generation with smooth output, and the user uses refrigeration fan coils and air conditioners Two ways of cooling are electricity, in which the cold water comes from the hot water output of the gas combined cycle unit and then converted by the centralized heat absorption refrigerator. The power is jointly provided by the gas combined cycle and the solar generator set. After the historical energy supply and energy consumption of users, use the "multiple regression" statistical analysis method to make predictions for a period of time in the future; and then schedule on this basis:

Under the condition of ensuring that the power supply and cooling supply are satisfied, the hot water flow supplied to the refrigeration centralized heat absorption refrigerator is reduced, and the lack of cooling capacity is compensated by power consumption refrigeration, which can compensate for the shortage of cold water refrigeration. It can also increase the load during low power periods;

At the same time, gas-fired heating boilers and gas-fired combined cycle units reduce the output of hot water for cooling, and their power generation output also changes accordingly. The power generation output can be reduced according to adjustment needs, because the total gas consumption is fixed, and the only way to reduce heat generation is to reduce the distribution of gas Increase the gas supply of the gas-fired combined cycle, resulting in a reduction in the output of heating and hot water and an increase in power generation, so that the supply can be met according to the change of power load and solar power; and according to the change of power load and solar power Coordination of power generation to meet supply;

In this way, solar power generation and thermal power are integrated and regulated, and the thermal power output and user power consumption load changes are adjusted according to the fluctuation of solar power generation. The equivalent smooth output of power generation on the user side, as shown in Figure 5, has a very significant effect.

Moreover, the present invention also takes into account the difference between two different refrigeration methods: the delay of cold water in pipeline transportation, and the instantaneous nature of power compensation refrigeration; thus, it is necessary to distinguish between different pipeline distances from users to refrigeration sources To deal with it, when the user compensates for cooling, it is to consider the compensation for the difference in cooling time, fully consider the energy changes on the supply side and the user side, not only use the smooth output of solar power generation, but also take into account the actual needs of users and the effective use of energy.

Description of drawings

Fig. 1 is the connection schematic diagram of the gas combined cycle and solar power generation combined refrigeration system of the present invention;

Fig. 2 is the structural representation of integrated dispatching control device;

Fig. 3 is a schematic diagram of the connection between the integrated dispatching control device and the cloud computing;

Fig. 4 is the structural representation of the 3rd remote centralized controller;

Fig. 5 is a comparison chart of the original solar power generation output and the adjusted solar power equivalent output curve.

Detailed ways

The combined refrigeration system of gas-fired combined cycle and solar power generation and its dispatching method provided by the present invention, on the supply side, the power is jointly provided by the combined-cycle unit and the solar generator unit, and the hot water supply of the gas-fired heating boiler and the gas-fired combined cycle unit is centralized heat absorption type Refrigerators are used to refrigerate and deliver cold water. Users use cooling fan coils to consume cold water to provide cold air and air conditioners to consume electricity. On the basis of historical testing, predict the energy supply and consumption in the future to reduce The cooling water output is compensated by power consumption cooling, so that compared with the fluctuation of solar power generation, the user’s power consumption load also has room for adjustment. Power consumption cooling can not only compensate for the lack of cold water cooling, but also increase the load during low power periods. In the compensation of the two methods of refrigeration, the delay of pipeline transportation and the instantaneous nature of electricity compensation refrigeration are considered to achieve effective adjustment of the entire system. In the following, the present invention will be further described in detail in conjunction with specific system configuration and adjustment methods, which are explanations rather than limitations of the present invention.

Referring to Figures 1 to 4, a gas combined cycle and solar power combined refrigeration system includes:

Gas-fired heating boiler and gas-fired combined cycle unit A for generating electricity and hot water for cooling;

Centralized heat absorption refrigerator 200, the input end is connected to the hot water outlet of the gas heating boiler and the gas combined cycle unit A, cold water is generated after heat exchange, and the output end is connected to the cooling pipeline 114;

Solar generator set B for generating electricity;

The user's air conditioner 108 connected in parallel with the gas heating boiler and the gas combined cycle unit A and the solar generator set B through the power cable network 113; the air conditioner remote control switch 117 for controlling the air conditioner 108;

The electricity meter that collects the user's non-cooling power consumption;

The cooling fan coil 110 of the user connected to the centralized heat absorption refrigerator 200 through the cooling pipeline 114, the cooling fan coil 110 consumes cold water and blows out cold air through heat exchange; the cooling fan coil cold water consumption meter 111 detects the refrigeration The cold water consumption of the fan coil unit 110; the remote control switch 116 of the cooling fan coil unit controlling the cooling fan coil unit 110;

The first remote centralized controller 1121 collects the production capacity information of the gas-fired heating boiler and the gas-fired combined cycle unit A, including the hot water flow for cooling and the power generation output, and transmits the collected production capacity information to the comprehensive dispatching control device 115; the first remote The centralized controller 1121 also receives the scheduling control signal sent by the comprehensive scheduling control device 115, and controls the action of the gas heating boiler and the gas combined cycle unit execution device 118 according to the scheduling control signal;

The second remote centralized controller 1122 collects the production capacity information of the power generation output of the solar generator set B, and transmits the collected production capacity information to the comprehensive dispatching control device 115;

The third remote centralized controller 1123 records the pipe distance information between the user's cooling fan coil unit 110 and the centralized heat absorption refrigerator 200, and collects information including the user's non-refrigerating power consumption and cooling fan coil unit cold water consumption The inflow of cold water detected by the meter 111 and the energy consumption information of the non-cooling power consumption; the user's pipeline distance information and the collected energy consumption information are transmitted to the comprehensive dispatching control device 115;

The third remote centralized controller 1123 also receives the scheduling control signal sent by the integrated scheduling control device 115, and drives the air conditioner remote control switch 117 and/or the refrigeration fan coil unit remote control switch 116 to perform actions according to the scheduling control signal;

The comprehensive scheduling control device 115 generates regulation and control signals according to the received capacity information, user's pipeline distance information and energy consumption information, and sends regulation and control signals to the first remote centralized controller 1121 and/or the third remote centralized controller 1123 .

The specific integrated scheduling control device 115 reduces the number of gas-fired heating boilers under the condition of ensuring the power supply and cooling supply according to the received production capacity information of the gas-fired heating boiler, the gas-fired combined cycle unit A, and the solar power generation unit B and the energy consumption information of the user. With the gas combined cycle unit A, the centralized heat absorption refrigerator 200 is supplied with the hot water flow for cooling, and the reduction of the hot water flow for cooling leads to insufficient cooling required by the user, which is compensated by the power consumption of the air conditioner 108 for cooling;

The comprehensive scheduling control device 115 sends out the hot water flow for cooling and power generation output of the gas-fired heating boiler and the gas-fired combined cycle unit A at the scheduling time, the amount of cold water flowing into the cooling fan coil 110 of the user, and the cooling power consumption of the air conditioner 108 Quantitative control signal.

Referring to Fig. 2, the integrated scheduling control device 115 includes:

The first data receiving unit 201 that receives the production capacity information of the gas heating boiler, the gas combined cycle unit A and the solar power generation unit B, the user's energy consumption information and the user's pipeline distance information;

A data decoder unit 202 that decodes all received data;

A data memory unit 203 storing all decoded data;

A scheduling control signal calculation unit 204 that generates a scheduling control signal;

a signal encoder 205 for encoding the scheduling control signal; and

The encoded scheduling control signal is transmitted to the sending unit 206 of the first remote centralized controller 1121 and the third remote centralized controller 1123 .

Referring to Fig. 3, the integrated dispatch control device 115 is connected to the cloud computing service system 917 through the power optical fiber 120, and drives the cloud computing service system 917 to calculate to obtain a dispatch control signal; the comprehensive dispatch control device 115 receives the cloud computing service system through the power optical fiber 120 917 to obtain the scheduling control signal, and then transmit the scheduling control signal to the first remote centralized controller 1121 and/or the third remote centralized controller 1123 via a power cable or wireless transmission.

The specific remote control method is:

The remote control switch 116 of the refrigeration fan coil unit is coupled with the comprehensive dispatching control device 115 by remote control through the third remote centralized controller 1123; The control device 115 is coupled; the air conditioner 108 is also provided with an air conditioner dedicated electric energy meter 109 to detect its cooling power consumption, which is collected by the third remote centralized controller;

The control execution device 118 of the gas heating boiler and the gas combined cycle unit is coupled with the comprehensive scheduling control device 115 by remote control through the first remote centralized controller 1121; the control and execution device 118 of the gas heating boiler and the gas combined cycle unit executes actions according to the dispatch control signal .

Referring to Fig. 4, the third remote centralized controller 1123 includes a non-refrigerated electric meter pulse counter, a refrigerated cold water flow pulse counter, a pulse signal code converter, a metering signal amplification transmitter, and interconnected control signal receiving decoders and remote control signals generator;

The pulse counter of the uncooled electric meter is connected to the user’s non-refrigerated electric meter to detect the user’s non-refrigerated power consumption data, and the user’s non-refrigerated power consumption data is processed by the pulse signal code converter and the metering signal amplification transmitter and then sent to the comprehensive dispatching control device 115;

The refrigeration cold water flow pulse counter is connected to the refrigeration fan coil cold water consumption meter 111 to detect the inflow of cold water, and the inflow of cold water is processed by the pulse signal code converter and the metering signal amplifier transmitter to generate a signal, which is transmitted together with the user pipeline information to Comprehensive scheduling control device 115;

The control signal receiving decoder receives and decodes the scheduling control information sent by the integrated scheduling control device 115, and then sends the control signal to the air conditioner remote control switch 117 and the refrigeration fan coil unit remote control switch 116 through the control signal remote control transmitter to perform actions.

The scheduling method based on the above gas combined cycle and solar power combined refrigeration system includes the following steps:

In the time period from 0 to T×ΔT, ΔT is the sampling period, and T is the number of collections. The comprehensive scheduling control device uses "multiple regression" statistics based on the received production capacity information of gas heating boilers, gas combined cycle units, and solar power generating units. The analysis method predicts the production capacity information of T~2T×ΔT for a period of time in the future, combined with the energy consumption information of users within the time period of 0~T×ΔT, under the condition of ensuring the power supply and cooling supply, the gas heating boiler and gas heating can be reduced. The combined cycle unit supplies the hot water flow of the centralized heat absorption refrigerator, and the cooling shortage caused by the reduction of the cold water flow is compensated by the power consumption of the air conditioner for cooling, and the supplementary amount is calculated considering the time when the cold water flows to the user;

Then, in the T～2T×ΔT time period, the comprehensive dispatching control device takes ΔT as the control cycle, generates and sends dispatching control signals according to the prediction and dispatching calculation of power supply and cooling supply, and the first remote centralized controller receives the dispatching control signals and then controls The hot water flow for cooling and power generation output of the gas heating boiler and the gas combined cycle unit. After receiving the scheduling control signal, the third remote centralized controller controls the power consumption of the air conditioner for cooling to compensate for the cooling caused by the reduction of cold water used by the cooling fan coil. insufficient.

In this way, based on the continuous control mode of real-time detection and prediction, the system is regulated with an equal detection period and adjustment period.

The generation of the scheduling control signal of the specific integrated scheduling control device includes the following steps:

1) Collect variables:

1.1) Collect the combined cycle electrical output P _COMB (t) of the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0～T×ΔT, and supply the heat output H _COMB (t) of the combined cycle of the centralized heat absorption refrigerator and The heat output H _BOIL (t) of the gas-fired heating boiler is sent to the comprehensive dispatching control device; ΔT is the sampling period (specifically, it can be 15-30min), T is the number of collection times, and T is a natural number;

并发送到综合调度控制装置；Collect the power generation output of 0~M solar generators in the time period of 0~T×ΔT

And sent to the integrated dispatching control device;

并发送到综合调度控制装置；1.2) Collect the following information of 0-N users within the time period of 0-T×ΔT: the distance S _i between the user and the pipeline of the centralized heat absorption refrigerator, the non-cooling power consumption P _i (t), the cooling fan panel Tube consumption H _i (t) for refrigeration and installed capacity of air conditioner

And sent to the integrated dispatching control device;

2) Calculate the following variables:

利用统计分析方法，预测T～2T×ΔT时间段的太阳能发电机总出力P_sum(t)；2.1) Calculate the total output of the solar generator in the time period of 0～T×ΔT Then according to the total output

Predict the total output of solar generators P _sum (t) in the time period of T～2T×ΔT by means of statistical analysis;

The thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption chiller by the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0～T×ΔT, and the thermal output H _BOIL (t) of the gas-fired heating boiler and the combined cycle electric output P _COMB (t), predict the thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption refrigerator and the thermal output H _BOIL ( t) and combined cycle electric output P _COMB (t);

v为冷水在管道中的流速；并对将计算结果做取整运算

2.2) Calculate the equivalent distance from each user to the centralized heat absorption refrigerator

v is the flow velocity of cold water in the pipeline; and round the calculation result

Divide users with the same s _i into the same group and count them as the lth group, s _i =1; for example, divide all users with s _i =10 into one group and count them as the 10th group; add up to L groups, L is a natural number;

For each user group, calculate the total cooling load H _load (l) and air conditioner capacity P _EHP (l) of all users in each group;

H _load (l)=∑H _i (t, l), H _i (t, l) is the cooling load of user i in group l at time t;

为第l组用户i的空调器容量；

is the air conditioner capacity of user i in group l;

3) Substituting P _Comb (t), H _COMB (t), H _Boil (t), P _load (t), H _load (l) and P _EHP (l), the objective function (1) and constraints ( 2-10) Composition optimization problem is solved iteratively to obtain the minimum value of the objective function, and the adjusted variable (that is, the amount of regulation of the variable in a certain period of time in the future) is used as the regulation signal:

3.1) The objective function is:

Min: $\mathrm{\&Delta;p}=\sqrt{\underset{t=T}{\overset{2T}{\mathrm{\&Sigma;}}}{(p_{p_v}\left(t\right)-{\stackrel{\&OverBar;}{p}}_{\mathrm{PV}})}^2/(T+1)};---\left(1\right)$

为等效太阳能发电出力平均值，其表达式分别如下：where p _pv (t) is the adjusted total output of equivalent solar power,

is the average value of equivalent solar power output, and its expressions are as follows:

p _pv (t)＝P _pv (t)+(p _ComB (t)-P _ComB (t))-p _EHPs (t) (2)

Among them, p _ComB (t) is the power generation output of the adjusted combined cycle unit, and P _COMB (t) is the power consumption of all user heat pumps when the predicted combined cycle electric output p _EHPs (t) is t;

${\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; p</span>}}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

3.2) Constraints

3.2.1) Cooling load balance equation

Reduce the cooling water output, and the insufficient cooling power on the supply side is Δh(t), and its expression is as follows:

Δh(t)=H _COMB (t)-h _COMB (t)+H _Boil (t)-h _Boil (t); (4)

Among them, H _COMB (t) is the predicted heat output of the combined cycle supplied to the centralized heat absorption refrigerator, and H _BOIL (t) is the predicted heat output of the gas-fired heating boiler supplied to the centralized heat absorption refrigerator , h _COMB (t) is the heat output supplied by the adjusted combined cycle to the centralized heat absorption refrigerator, h _Boil (t) is the heat output supplied to the centralized heat absorption refrigerator by the gas heating boiler;

Considering the time for cold water to flow into the user in the pipeline, the compensation Δh(t) required by the user to use the air conditioner is expressed as:

$\mathrm{\&Delta;h}\left(t\right)=\underset{l=0}{\overset{L}{\mathrm{\&Sigma;}}}{h}_{\mathrm{EHP}}(t+l,l);$ (T≤t+l≤2T) (5)

h _EHP (t+l, l) is the sum of the cooling power of the user air conditioners in group l at time t+l;

3.2.2) Constraints of gas heating boiler and gas combined cycle unit:

h _COMB (t) = f _COMB (t) η ^q _ComB ; (6)

${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; \&eta;</span>}}_{\mathrm{<span\; class="notranslate">\; ComB</span>}}^{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$

为联合循环热效率；为联合循环发电效率；h_COMB(t)调节后联合循环供给集中式热吸收式制冷机的热出力，p_Comb(t)为调节后联合循环的电出力，f_COMB(t)为调节后联合循环的功率能耗；in,

is the thermal efficiency of the combined cycle; is the power generation efficiency of the combined cycle; h _COMB (t) is the heat output of the centralized heat absorption refrigerator supplied by the adjusted combined cycle, p _Comb (t) is the electric output of the adjusted combined cycle, f _COMB (t) is the adjusted combined cycle Cycle power consumption;

3.2.3) User-side air conditioner constraints

Thermoelectric ratio constraints: h _EHP (t, l) = COP _EHP p _EHP (t, l) (8)

h _EHP (t, l) is the sum of the cooling power of the user's air conditioner in group l at time t, and COP _EHP is the coefficient of performance of the air conditioner;

Output upper limit: 0≤p _EHP (t, l)≤min(P _EHP (l), H _load (l)/COP _EHP ); (9)

The sum of the air conditioner power consumption of all user groups in each period:

${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHPs</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; L</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHP</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 10</span>}<span\; class="notranslate">\; )</span>$

4) The integrated scheduling control device generates scheduling control signals according to the adjusted variables in the calculation results and sends out:

The combined cycle of the gas heating boiler and the gas combined cycle unit is supplied to the heat output h _COMB (t) of the centralized heat absorption refrigerator, the electric output p _Comb (t) of the combined cycle, and the gas heating boiler is supplied to the centralized heat absorption refrigeration The thermal output h _Boil (t) of the machine is sent to the first remote centralized controller to control its actions in each period of future adjustment time;

Send the power consumption p _EHP (t, l) and the cooling capacity h _EHP (t, l) of the user's air conditioner to the third remote centralized controller to control its actions in each period of the future adjustment time.

Referring to the comparison chart of the original solar power generation output and the adjusted solar power equivalent output curve shown in Figure 5, it can be seen that the solar power generation output fluctuates greatly before the adjustment, but after the adjustment, the solar power equivalent output is relatively smooth. Compared before and after, the effect is very significant.

Claims (8)

1. A gas combined cycle and solar power generation combined refrigeration system, characterized in that it comprises: Gas-fired heating boilers and gas-fired combined cycle units (A) for generating electricity and hot water for cooling; Centralized heat absorption refrigerator (200), the input end is connected to the hot water outlet of the gas heating boiler and the gas combined cycle unit (A), cold water is generated after heat exchange, and the output end is connected to the cooling pipe (114); A solar generator set (B) for generating electricity; The user's air conditioner (108) connected in parallel with the gas heating boiler, the gas combined cycle unit (A) and the solar generator set (B) through the power cable network (113); the air conditioner remote control switch (117) for controlling the air conditioner (108) ; The electricity meter that collects the user's non-cooling power consumption; The cooling fan coil (110) of the user connected to the centralized heat absorption refrigerator (200) through the cooling pipeline (114); the cooling water consumption meter of the cooling fan coil (111), and the detection of the cooling fan coil (110) ) of cold water consumption; the remote control switch (116) of the cooling fan coil unit (110) for controlling the cooling fan coil unit; The first remote centralized controller (1121) collects the production capacity information of the gas-fired heating boiler and the gas-fired combined cycle unit (A), including the flow of hot water for cooling and the output of power generation, and transmits the collected production capacity information to the comprehensive dispatching control device ( 115); the first remote centralized controller (1121) also receives the scheduling control signal sent by the integrated scheduling control device (115), and controls the action of the gas heating boiler and gas combined cycle unit control execution device (118) according to the scheduling control signal; The second remote centralized controller (1122) collects the production capacity information of the power generation output of the solar generator set (B), and transmits the collected production capacity information to the comprehensive dispatching control device (115); The third remote centralized controller (1123) records the pipe distance information between the user’s refrigeration fan coil unit (110) and the centralized heat absorption refrigerator (200), and collects information including the user’s non-refrigeration power consumption and The energy consumption information of the inflow of cold water detected by the refrigeration fan coil cold water consumption meter (111); the user's pipeline distance information and the collected energy consumption information are transmitted to the comprehensive dispatching control device (115); The third remote centralized controller (1123) also receives the scheduling control signal sent by the integrated scheduling control device (115), and drives the remote control switch of the air conditioner (117) and/or the remote control switch of the refrigeration fan coil unit (116) according to the scheduling control signal ) to perform an action; The comprehensive dispatching control device (115) generates regulation and control signals according to the received capacity information, user's pipeline distance information and energy consumption information, and sends them to the first remote centralized controller (1121) and/or the third remote centralized controller (1123 ) to send a regulatory control signal. 2. The combined refrigeration system of gas combined cycle and solar power generation according to claim 1, characterized in that the comprehensive scheduling control device (115) according to the received gas heating boiler and gas combined cycle unit (A), solar power generation unit (B ) production capacity information and user energy consumption information, under the conditions of ensuring the power supply and cooling supply, reduce the hot water supplied by the gas heating boiler and the gas combined cycle unit (A) to the centralized heat absorption refrigerator (200) Flow rate, reducing the hot water flow rate for cooling causes insufficient cooling required by the user to be compensated by the cooling power consumed by the air conditioner (108); The comprehensive scheduling control device (115) sends out the hot water flow for cooling and power generation output of the gas heating boiler and the gas combined cycle unit (A) at the scheduling time, the amount of cold water flowing into the user's cooling fan coil (110) and the air conditioner. A control signal for regulating and controlling the cooling power consumption of the device (108). 3. The combined refrigeration system of gas combined cycle and solar power generation according to claim 1, characterized in that the integrated scheduling control device (115) includes: The first data receiving unit (201) that receives the production capacity information of the gas heating boiler, the gas combined cycle unit (A) and the solar power generation unit (B), the user's energy consumption information and the user's pipeline distance information; a data decoder unit (202) that decodes all data received; A data storage unit (203) for storing all decoded data; a dispatch control signal calculation unit (204) generating a dispatch control signal; a signal encoder (205) for encoding said dispatch control signal; and The encoded scheduling control signal is transmitted to the sending unit (206) of the first remote centralized controller (1121) and the third remote centralized controller (1123). 4. The combined refrigeration system of gas combined cycle and solar power generation according to claim 1, characterized in that the comprehensive dispatching control device (115) is connected to the cloud computing service system (917) through the power optical fiber (120) and drives cloud computing The service system (917) calculates to obtain the dispatch control signal; the integrated dispatch control device (115) receives the dispatch control signal obtained by the cloud computing service system (917) through the power optical fiber (120), and then transmits the dispatch The control signal is transmitted to the first remote centralized controller (1121) and/or the third remote centralized controller (1123). 5. The combined refrigeration system of gas combined cycle and solar power generation according to claim 1, characterized in that the remote control switch (116) of the refrigeration fan coil unit communicates remotely with the third remote centralized controller (1123) The integrated dispatching control device (115) is coupled; the air conditioner remote switch (117) is coupled with the integrated dispatching control device (115) by remote control through the third remote centralized controller (1123); the air conditioner (108) is also equipped with an air conditioner Electric energy meter (109) dedicated to the appliance to detect the power consumption of its refrigeration, and the power consumption is collected by the third remote centralized controller; The control executive device (118) of the gas heating boiler and the gas combined cycle unit is coupled with the comprehensive dispatching control device (115) by remote control through the first remote centralized controller (1121); the control executive device of the gas heating boiler and the gas combined cycle unit ( 118) Execute actions according to the scheduling control signal. 6. The combined refrigeration system of gas combined cycle and solar power generation according to claim 1, characterized in that the third remote centralized controller (1123) includes a non-refrigerated electric meter pulse counter, a refrigerated cold water flow pulse counter, a pulse signal code Converter, metering signal amplifying transmitter, and interconnected control signal receiving decoder and remote control signal generator; The pulse counter of the non-refrigeration meter is connected to the user’s non-refrigeration meter to detect the user’s non-refrigeration power consumption data. The user’s non-refrigeration power consumption data is processed by the pulse signal code converter and the metering signal amplification transmitter and then sent to the comprehensive dispatching control device (115) ; The refrigeration cold water flow pulse counter is connected to the refrigeration fan coil cold water consumption meter (111) to detect the inflow of cold water, and the inflow of cold water is processed by the pulse signal code converter and the metering signal amplifier transmitter to generate a signal, together with the user's pipeline information Send to the integrated dispatching control device (115); The control signal receiving decoder receives and decodes the scheduling control information sent by the integrated scheduling control device (115), and then sends the control signal to the remote control switch of the air conditioner (117) and the remote control switch of the refrigeration fan coil unit through the control signal remote control transmitter (116) EXECUTE ACTIONS. 7. The scheduling method of the gas combined cycle and solar power combined refrigeration system according to claim 1, characterized in that it comprises the following steps: In the time period from 0 to T×ΔT, ΔT is the sampling period, and T is the number of collections. The integrated dispatching control device predicts the future period T ~2T×ΔT production capacity information, combined with the user’s energy consumption information within the 0~T×ΔT time period, under the condition of ensuring the power supply and cooling supply, reduce the centralized heat absorption of gas heating boilers and gas combined cycle units The flow of hot water refrigerated by the type refrigerator, reducing the flow of cold water leads to insufficient cooling required by the user, which is compensated by the power consumption of the air conditioner for cooling, and the supplementary amount is calculated by considering the time when the cold water flows to the user; Then, in the T～2T×ΔT time period, the comprehensive dispatching control device takes ΔT as the control cycle, generates and sends dispatching control signals according to the prediction and dispatching calculation of power supply and cooling supply, and the first remote centralized controller receives the dispatching control signals and then controls The hot water flow for cooling and power generation output of the gas heating boiler and the gas combined cycle unit. After receiving the scheduling control signal, the third remote centralized controller controls the power consumption of the air conditioner for cooling to compensate for the cooling caused by the reduction of cold water used by the cooling fan coil. insufficient. 8. The scheduling method of the gas combined cycle and solar power generation combined refrigeration system as claimed in claim 7, wherein the generation of the scheduling control signal of the integrated scheduling control device comprises the following steps: 1) Acquisition variables: 1.1) Collect the combined cycle electrical output P _COMB (t) of the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0-T×ΔT, and supply the heat output H _COMB (t) of the combined cycle of the centralized heat absorption refrigerator and The heat output H _BOIL (t) of the gas-fired heating boiler is sent to the comprehensive dispatching control device; ΔT is the sampling period, T is the number of collections, and T is a natural number; Collect the power generation output of 0~M solar generators in the time period of 0~T×ΔT And sent to the integrated dispatching control device; 1.2) Collect the following information of 0-N users within the time period of 0-T×ΔT: the user’s pipe distance S _i from the centralized heat absorption refrigerator, non-cooling power consumption P _i (t), cooling fan disk Tube consumption H _i (t) for refrigeration and installed capacity of air conditioner

And sent to the integrated dispatching control device; 2) Calculate the following variables: 2.1) Calculate the total output of the solar generator in the time period of 0～T×ΔT

Then according to the total output

Using statistical analysis methods to predict the total output of solar generators in the T～2T×ΔT time period The thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption chiller by the gas-fired heating boiler and the gas-fired combined cycle unit in the time period of 0～T×ΔT, and the thermal output H _BOIL (t) of the gas-fired heating boiler and the combined cycle electric output P _COMB (t), predict the thermal output H _COMB (t) of the combined cycle supplied to the centralized heat absorption refrigerator and the thermal output H _BOIL ( t) and combined cycle electric output P _COMB (t); 2.2) Calculate the equivalent distance from each user to the centralized heat absorption chiller

v is the flow velocity of cold water in the pipeline; and round the calculation result

Divide users with the same s _i into the same group, which is counted as the lth group, s _i =l; a total of L groups, L is a natural number; For each user group, calculate the total cooling load H _load (l) and air conditioner capacity P _EHP (l) of all users in each group; H _load (l)=∑H _i (t,l), H _i (t,l) is the cooling load of user i in group l at time t;

is the air conditioner capacity of user i in group l; 3) Substituting P _Comb (t), H _COMB (t), H _Boil (t), P _load (t), H _load (l) and P _EHP (l), the objective function (1) and constraints ( 4)～(10) Iteratively solve the optimization problem to obtain the minimum value of the objective function, and obtain each variable as a control signal: 3.1) The objective function is: $\mathrm{<span\; class="notranslate">\; Min</span>}<span\; class="notranslate">\; :</span>\mathrm{<span\; class="notranslate">\; \&Delta;p</span>}<span\; class="notranslate">\; =</span>\sqrt{\underset{\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; T</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; T</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>}<span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$ where p _pv (t) is the adjusted total output of equivalent solar power,

is the average value of equivalent solar power output, and its expressions are as follows: p _pv (t)=P _pv (t)+(p _ComB (t)-P _ComB (t))-p _EHPs (t) (2) Among them, p _ComB (t) is the power generation output of the adjusted combined cycle unit, and P _COMB (t) is the power consumption of all user heat pumps when the predicted combined cycle electric output p _EHPs (t) is t; $\stackrel{<span\; class="notranslate">\; -</span>}{{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; PV</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$ 3.2) Constraints 3.2.1) Cooling load balance equation Reduce the cooling water output, and the insufficient cooling power on the supply side is Δh(t), and its expression is as follows: Δh(t)=H _COMB (t)-h _COMB (t)+H _Boil (t)-h _Boil (t); (4) Among them, H _COMB (t) is the predicted heat output of the combined cycle supplied to the centralized heat absorption refrigerator, and H _BOIL (t) is the predicted heat output of the gas-fired heating boiler supplied to the centralized heat absorption refrigerator , h _COMB (t) is the heat output supplied by the adjusted combined cycle to the centralized heat absorption refrigerator, h _Boil (t) is the heat output supplied to the centralized heat absorption refrigerator by the gas heating boiler; Considering the time for cold water to flow into the user in the pipeline, the compensation Δh(t) required by the user to use the air conditioner is expressed as: $\mathrm{\&Delta;h}\left(t\right)=\underset{l=0}{\overset{L}{\mathrm{\&Sigma;}}}{h}_{\mathrm{EHP}}(t+l,l);$ (T≤t+l≤2T) (5) h _EHP (t+l,l) is the sum of the cooling power of user air conditioners in group l at time t+l; 3.2.2) Constraints on gas heating boilers and gas combined cycle units: h _COMB (t) = f _COMB (t).η ^q _ComB ; (6) ${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; COMB</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; \&CenterDot;</span>{\mathrm{<span\; class="notranslate">\; \&eta;</span>}}_{\mathrm{<span\; class="notranslate">\; ComB</span>}}^{\mathrm{<span\; class="notranslate">\; e</span>}}<span\; class="notranslate">\; ;</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$ in,

is the thermal efficiency of the combined cycle;

is the power generation efficiency of the combined cycle; h _COMB (t) is the heat output of the centralized heat absorption refrigerator supplied by the adjusted combined cycle, p _Comb (t) is the electric output of the adjusted combined cycle, f _COMB (t) is the adjusted combined cycle Cycle power consumption; 3.2.3) User-side air conditioner constraints Thermoelectric ratio constraints: h _EHP (t,l)=COP _EHP .p _EHP (t,l) (8) h _EHP (t,l) is the sum of the cooling power of user air conditioners in group l at time t, and COP _EHP is the coefficient of performance of the air conditioners; Output upper limit: 0≤p _EHP (t,l)≤min(P _EHP (l),H _load (l)/COP _EHP ); (9) The sum of the air conditioner power consumption of all user groups in each period: ${\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHPs</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>\underset{\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}}{\overset{\mathrm{<span\; class="notranslate">\; L</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; p</span>}}_{\mathrm{<span\; class="notranslate">\; EHP</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; t</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; l</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 10</span>}<span\; class="notranslate">\; )</span>$ 4) The comprehensive scheduling control device generates scheduling control signals according to the adjusted variables in the calculation results and sends out: The combined cycle of the gas heating boiler and the gas combined cycle unit is supplied to the heat output h _COMB (t) of the centralized heat absorption refrigerator, the electric output p _Comb (t) of the combined cycle, and the gas heating boiler is supplied to the centralized heat absorption refrigeration The thermal output h _Boil (t) of the machine is sent to the first remote centralized controller to control its actions in each period of future adjustment time; Send the power consumption p _EHP (t, l) and the cooling capacity h _EHP (t, l) of the user's air conditioner to the third remote centralized controller to control its actions in each period of the future adjustment time.

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