CN110994646B - Method, system and storage medium for evaluating running effect of AGC (automatic gain control) adjustment of power grid - Google Patents

Abstract

The application relates to an operation effect evaluation method and system for energy storage to participate in AGC regulation of a power grid, and the benefits of a power generation side, a power grid side and a society side and the benefits of the energy storage side are calculated by aiming at different energy storage joint frequency modulation systems; and the comprehensive benefits of the energy storage combined frequency modulation system are obtained by calculating the index comprehensive weight, and then the comprehensive benefit values with different numbers are compared, so that the optimal configuration condition can be determined. The running effect evaluation method and the running effect evaluation system for the AGC regulation of the energy storage participation power grid have good operability, can quantify benefit indexes, and provide scientific reference for optimizing operation.

Description

Method, system and storage medium for evaluating operation effect of AGC regulation of power grid

Technical Field

The present application belongs to the technical field of electric power planning, and in particular, relates to a method and system for evaluating the operation effect of energy storage participating in AGC regulation of a power grid.

Background Art

Large-scale electrochemical energy storage devices participating in grid frequency regulation have fast response speed and high control accuracy, effectively solving the problems of reverse and delay in the frequency regulation of traditional frequency-regulated power sources. The energy storage combined with frequency regulation system brings many application values during operation, but there is currently no clear method to quantify the multiple values of energy storage combined with frequency regulation projects. Therefore, research on the operating benefits brought by the application of energy storage combined with frequency regulation is of great significance to the large-scale development of energy storage.

Existing related research mainly evaluates the value of the system from the perspectives of single value, multiple values and levelized cost. However, when evaluating the comprehensive benefits of energy storage combined with frequency regulation system, the above-mentioned research lacks evaluation dimensions and fails to comprehensively consider the multiple values generated by the energy storage system. The expert scoring method is used to decide the weight, which is highly subjective.

Power system load. According to the change of active power, the load can be divided into three types: first-class load, second-class load and third-class load. The first-class load has a small amplitude change, but a large rate of change, with hundreds of changes per hour; the second-class load has a large amplitude change and a large rate of change, with 20 to 30 changes per hour; the third-class load has a large amplitude change and a small rate of change, with a dozen to dozens of changes in a day and night.

Power system frequency regulation. In response to load changes, my country's frequency regulation is also divided into three forms: primary frequency regulation, secondary frequency regulation and tertiary frequency regulation. Primary frequency regulation can quickly respond to system frequency changes, but the duration is relatively short; secondary frequency regulation is slower than primary frequency regulation, but the duration can reach minutes or longer; tertiary frequency regulation requires the total active power generated by the generator set to be estimated before power generation arrangements are made.

Tracking frequency regulation response. Usually, the power grid frequency regulation task is undertaken by traditional frequency regulation power sources such as hydropower units and coal-fired units. Traditional frequency regulation power sources will experience reverse, deviation, delay and other phenomena during the frequency regulation process, making it difficult to meet the dispatching needs.

Compared with traditional frequency-modulated power supplies, energy storage systems have obvious advantages, such as fast response speed, high accuracy, and can easily meet scheduling requirements.

Energy storage frequency regulation mode. There are three forms of energy storage participating in auxiliary frequency regulation: independent energy storage frequency regulation power station, energy storage and grid-side joint frequency regulation power station, and energy storage and load-side joint frequency regulation power station.

(1) Independent energy storage and frequency regulation power station. An independent energy storage and frequency regulation power station refers to an entity that directly accepts grid dispatch and independently participates in market frequency regulation. It can directly settle revenue with the grid and has an independent account. Grids in various regions of my country have issued relevant policies to allow independent energy storage power stations to assist in serving the grid, but due to the lack of actual operational details in terms of dispatching and compensation, it will still take some time to establish independent energy storage and frequency regulation power stations in my country.

(2) Energy storage combined with frequency regulation power station on the power generation side. Energy storage combined with frequency regulation power station on the power generation side refers to the combination of thermal power generation units and energy storage equipment to form a new frequency regulation power source, and the two provide frequency regulation services for the power grid in a certain ratio. Thermal power generation units provide energy support, and energy storage equipment can quickly store and release energy. The combination of the two provides higher quality and more efficient frequency regulation resources, which is very commercially valuable. When settling expenses, you only need to settle with the generator set, and then the generator set and energy storage equipment will settle by themselves according to the signed contract.

(3) Energy storage combined with frequency regulation power station on the load side. Energy storage combined with frequency regulation power station on the load side refers to the combined operation of energy storage and user-side power generation equipment to perform frequency regulation. Energy storage combined with frequency regulation technology on the load side has begun to develop, which can provide auxiliary services while shaving peaks and filling valleys. my country has also mentioned the establishment of energy storage projects on the user side, but has not actually formulated details such as scheduling and settlement, and is not yet operational.

Summary of the invention

The technical problem to be solved by the present invention is: to solve the deficiencies in the prior art, thereby providing a method and system for evaluating the operating effect of energy storage participating in AGC regulation of a power grid with good operability.

The technical solution adopted by the present invention to solve the technical problem is:

A method for evaluating the operation effect of energy storage participating in AGC regulation of a power grid comprises the following steps:

For different energy storage combined with frequency regulation systems, the benefits on the power generation side, the grid side and the social side are calculated respectively;

Calculate the energy storage side benefits based on the matching agreement between energy storage equipment and generator sets and the power generation side benefits;

For different energy storage combined frequency regulation systems, the comprehensive benefits of the system are calculated based on the benefits on the power generation side, the grid side, the social side and the energy storage side.

The energy storage combined with frequency regulation system is optimally configured based on the calculated comprehensive system benefits.

Preferably, the method for evaluating the operation effect of energy storage participating in AGC regulation of power grid of the present invention,

The benefits on the power generation side include the power generation side frequency regulation compensation benefits _RA , power generation coal consumption reduction benefits _Rh and power generation side assessment reduction benefits _RK ;

The revenue on the grid side is the revenue R _c from the reduction of total frequency regulation costs on the grid side;

The social benefit is the social environmental benefit R _S ;

The calculation method is:

Collect the total compensation income, comprehensive performance indicators and frequency regulation depth of the energy storage combined with frequency regulation system, and calculate the generation side frequency regulation compensation income _RA and the energy storage side frequency regulation compensation income _RB based on the generation side frequency regulation compensation income and the profit sharing ratio of the contracted generator set and energy storage equipment;

Collect the measured unit availability, unit capacity and measured unit regulation performance to calculate the power generation side assessment reduction benefit R _K ;

Collect the total power generation during the regulation period to calculate the benefit of reduced coal consumption for power generation R _h ;

Collect the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is not put into use, and the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is put into use, and calculate the total frequency regulation cost reduction benefit _Rc on the grid side;

Collect and reduce the total coal consumption to calculate the social environmental protection benefits R _S .

Preferably, the method for evaluating the operation effect of energy storage participating in AGC regulation of power grid of the present invention,

The calculation methods of the frequency regulation compensation income _RA on the power generation side and the frequency regulation compensation income _RB on the energy storage side are as follows:

in:

is the total compensation income of the energy storage combined with frequency regulation system on day i;

is the comprehensive performance index of the energy storage combined with frequency regulation system on day i;

is the frequency regulation depth of the energy storage combined frequency regulation system on day i;

It is the frequency modulation compensation standard;

The frequency regulation compensation income on the power generation side and the income sharing ratio of the contracted power generation units and energy storage equipment is p ₁ :p ₂ ;

and/or

The calculation method of the reduction benefit R _K of the power generation side assessment is as follows:

R _K =((98%-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P )×r _w

in:

K _A is the measured unit availability;

_PN is the unit capacity (MW);

∝ _{AGC, A} is the availability assessment coefficient, and its value is 1;

K _P is the measured unit regulation performance;

∝ _AGC,P is the adjustment performance assessment coefficient, and its value is 2;

r _w is the on-grid electricity price;

and/or

The calculation method of the total coal consumption reduction benefit R _h is:

R _h =Q _d ×m×r _h

in:

Q _d is the total power generation during the regulation period;

m is the difference in coal consumption per kilowatt-hour;

r _h is the standard coal price.

and/or

The calculation method of the total grid-side frequency regulation cost reduction benefit _RC is:

in:

is the comprehensive performance index of the frequency regulation system i without energy storage;

is the regulation mileage of the energy storage combined frequency regulation system i without investment;

K _b is the compensation standard;

It is the comprehensive performance index of energy storage combined with frequency regulation system i;

The regulation mileage of the energy storage combined frequency regulation system i;

n is the total number of units put into operation under different energy storage units;

and/or

The calculation method of the social environmental protection benefit R _S is:

m _h is the reduction in total coal consumption, _Wi is the amount of pollutants emitted per kilogram of coal, and _Yi is the charging standard for pollutants emitted per kilogram of coal.

Preferably, the method for evaluating the operation effect of energy storage participating in AGC regulation of power grid of the present invention,

When calculating the comprehensive benefits of the system, first determine the comprehensive weights of the indicators of the frequency regulation compensation income on the power generation side _RA , the frequency regulation compensation income on the energy storage side _{RB ,} the assessment reduction income on the power generation side _RK , the reduction income of coal consumption for power generation Rh, the reduction income of total frequency regulation costs on the grid side _Rc , and the social environmental protection income _RS ;

The calculation method of the benefit R _Z of energy storage combined with frequency regulation is:

R _Z =w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ;

w _j , j is 1-6, indicating the comprehensive weight of the indicator.

Preferably, the method for evaluating the operation effect of energy storage participating in AGC regulation of power grid of the present invention,

The calculation of the comprehensive weight of the indicators is calculated using the least squares decision model:

Calculate the objective function:

Limitations:

ω _j is the subjective preference weight;

μ _j is the objective weight;

b _ij is the standardized decision indicator.

Preferably, the method for evaluating the operation effect of energy storage participating in AGC regulation of power grid of the present invention,

When optimizing the configuration of the energy storage combined with frequency regulation system, the comprehensive system benefits of different numbers of energy storage units are compared, and the number with the highest system comprehensive benefit is selected as the number that needs to be set for the energy storage combined with frequency regulation system.

The present application provides an energy storage operation effect evaluation system for participating in grid AGC regulation, comprising:

The first benefit calculation module includes a power generation side benefit calculation submodule, a grid side benefit calculation submodule and a social side benefit calculation submodule, which are used to calculate the benefits of the power generation side, the grid side and the social side for different energy storage combined frequency regulation systems;

The second profit calculation module is used to calculate the energy storage side profit according to the matching agreement between the energy storage device and the generator set and the power generation side profit;

The system comprehensive benefit calculation module is used to calculate the system comprehensive benefits of different energy storage combined frequency regulation systems based on the benefits of the power generation side, the grid side, the social side and the energy storage side;

The configuration optimization module is used to optimize the configuration of the energy storage and frequency regulation system according to the calculated comprehensive benefits.

The energy storage system of the present invention participates in the operation effect evaluation of the AGC regulation of the power grid.

The power generation side benefit calculation submodule is used to calculate the power generation side frequency regulation compensation benefit _RA , power generation coal consumption reduction benefit _Rh and power generation side assessment reduction benefit _RK ;

The grid-side revenue calculation submodule is used to calculate the grid-side total frequency regulation fee reduction revenue R _c ;

The social benefit calculation submodule is used to calculate the social environmental protection benefit R _S ;

The second benefit calculation module is used to calculate the energy storage side frequency regulation compensation benefit _RB ;

In the first income calculation module and the second income calculation module,

The frequency regulation compensation income R _A on the power generation side and the frequency regulation compensation income R _B on the energy storage side are calculated by collecting the total compensation income, comprehensive performance indicators and frequency regulation depth of the energy storage combined frequency regulation system, and based on the frequency regulation compensation income on the power generation side and the profit sharing ratio of the signed power generation units and energy storage equipment;

The reduction benefit R _K of the power generation side assessment is calculated by collecting the measured unit availability, unit capacity and measured unit regulation performance;

The benefit of reducing coal consumption for power generation R _h is calculated by collecting the total power generation during the regulation period;

The total frequency regulation cost reduction benefit R _c on the grid side is calculated by collecting the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is not put into use and the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is put into use;

The social and environmental benefits _RS are calculated by collecting and reducing the total coal consumption.

Preferably, in the energy storage participating in the operation effect evaluation system of the power grid AGC regulation of the present invention, the frequency regulation compensation income _RA on the power generation side and the frequency regulation compensation income _RB on the energy storage side are calculated as follows:

in:

is the total compensation income of the energy storage combined with frequency regulation system on day i;

is the comprehensive performance index of the energy storage combined with frequency regulation system on day i;

is the frequency regulation depth of the energy storage combined frequency regulation system i on the mth day;

It is the frequency modulation compensation standard;

The frequency regulation compensation income on the power generation side and the income sharing ratio of the contracted power generation units and energy storage equipment is p ₁ :p ₂ ;

and/or

The calculation method of the reduction benefit R _K of the power generation side assessment is as follows:

R _K =((98%-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P )×r _w

in:

K _A is the measured unit availability;

_PN is the unit capacity (MW);

∝ _{AGC, A} is the availability assessment coefficient, and its value is 1;

K _P is the measured unit regulation performance;

∝ _AGC,P is the adjustment performance assessment coefficient, and its value is 2;

r _w is the on-grid electricity price;

and/or

The calculation method of the total coal consumption reduction benefit R _h is:

R _h =Q _d ×m×r _h

in:

Q _d is the total power generation during the regulation period;

m is the difference in coal consumption per kilowatt-hour;

r _h is the standard coal price.

and/or

The calculation method of the total grid-side frequency regulation cost reduction benefit _RC is:

in:

is the comprehensive performance index of the frequency regulation system i without energy storage;

is the regulation mileage of the energy storage combined frequency regulation system i without investment;

K _b is the compensation standard;

It is the comprehensive performance index of energy storage combined with frequency regulation system i;

The regulation mileage of the energy storage combined frequency regulation system i;

n is the total number of units put into operation under different energy storage units;

and/or

The calculation method of the social environmental protection benefit R _S is:

m _h is the reduction of total coal consumption, W _i is the pollutant emission per kilogram of coal, and Y _i is the charging standard for pollutants emitted per kilogram of coal;

and/or

When calculating the comprehensive benefits of the system, first determine the comprehensive weights of the indicators of the frequency regulation compensation income on the power generation side _RA , the frequency regulation compensation income on the energy storage side _{RB ,} the assessment reduction income on the power generation side _RK , the reduction income of coal consumption for power generation Rh, the reduction income of total frequency regulation costs on the grid side _Rc , and the social environmental protection income _RS ;

The calculation method of the benefit R _Z of energy storage combined with frequency regulation is:

R _Z =w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ;

w _j , j is 1-6, indicating the comprehensive weight of the indicator;

and/or

The calculation of the comprehensive weight of the indicators is calculated using the least squares decision model:

Calculate the objective function:

Limitations:

ω _j is the subjective preference weight;

μ _j is the objective weight;

b _ij is the standardized decision indicator;

and/or

When optimizing the configuration of the energy storage combined with frequency regulation system, the comprehensive system benefits of different numbers of energy storage units are compared, and the number with the highest system comprehensive benefit is selected as the number that needs to be set for the energy storage combined with frequency regulation system.

The present application also provides a computer-readable storage medium storing computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the above-mentioned method for evaluating the operating effect of energy storage participating in AGC regulation of the power grid.

The beneficial effects of the present invention are:

The method and system for evaluating the operating effect of energy storage participating in the AGC regulation of the power grid in this application calculates the benefits of the power generation side, the power grid side, the social side and the energy storage side for different energy storage combined with frequency regulation systems; and obtains the comprehensive benefits of the energy storage combined with frequency regulation system by calculating the comprehensive weights of indicators, and then compares the comprehensive benefit values of different quantities to determine the optimal configuration. The method and system for evaluating the operating effect of energy storage participating in the AGC regulation of the power grid in this application have good operability, can quantify benefit indicators, and provide a scientific reference for optimizing operations.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

FIG1 is a flow chart of a method for evaluating the operation effect of energy storage participating in AGC regulation of a power grid according to the present application;

FIG2 is a schematic diagram of the structure of the operation effect evaluation system of the energy storage participating in the AGC regulation of the power grid according to the present application.

DETAILED DESCRIPTION

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

Example 1

This embodiment provides a method for evaluating the operation effect of energy storage participating in grid AGC regulation, as shown in FIG1 , including the following steps:

S1: For different energy storage combined with frequency regulation systems, the benefits of the power generation side, the grid side and the social side are calculated respectively;

S2: Calculate the energy storage side benefits based on the matching agreement between energy storage equipment and generator sets and the power generation side benefits;

S3: For different energy storage combined frequency regulation systems, the comprehensive benefits of the system are calculated based on the benefits of the power generation side, the grid side, the social side and the energy storage side;

S4: Optimize the configuration of the energy storage combined with frequency regulation system based on the calculated comprehensive system benefits.

(The execution order of S1 and S2 can be swapped arbitrarily).

The method for evaluating the operating effect of energy storage participating in the AGC regulation of the power grid in this embodiment calculates the benefits of the power generation side, the power grid side, the social side and the energy storage side for different energy storage combined frequency regulation systems; and obtains the comprehensive benefits of the energy storage combined frequency regulation system by calculating the comprehensive weight of indicators, and then compares the comprehensive benefit values of different quantities to determine the optimal configuration. The method and system for evaluating the operating effect of energy storage participating in the AGC regulation of the power grid in this application have good operability, can quantify benefit indicators, and provide a scientific reference for optimizing operations.

The benefits on the power generation side include the power generation side frequency regulation compensation benefits _RA , power generation coal consumption reduction benefits _Rh and power generation side assessment reduction benefits _RK ;

The revenue on the grid side is the revenue R _c from the reduction of the total frequency regulation cost on the grid side;

The social benefit is the social environmental benefit R _S ;

The calculation method is:

Collect the total compensation income, comprehensive performance indicators and frequency regulation depth of the energy storage combined with frequency regulation system, and calculate the generation side frequency regulation compensation income _RA and the energy storage side frequency regulation compensation income _RB based on the generation side frequency regulation compensation income and the profit sharing ratio of the contracted generator set and energy storage equipment;

Collect the measured unit availability, unit capacity and measured unit regulation performance to calculate the power generation side assessment reduction benefit R _K ;

Collect the total power generation during the regulation period to calculate the benefit of reduced coal consumption for power generation R _h ;

Collect the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is not put into use, and the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is put into use, and calculate the total frequency regulation cost reduction benefit _Rc on the grid side;

Collect and reduce the total coal consumption to calculate the social environmental protection benefits R _S .

Specifically:

According to the frequency regulation compensation income on the power generation side and the profit sharing ratio _p1 : _p2 of the power generation unit and the energy storage equipment, the frequency regulation compensation income _RA on the power generation side and the frequency regulation compensation income _RB on the energy storage side are calculated. The calculation method of the frequency regulation compensation income _RA on the power generation side and the frequency regulation compensation income _RB on the energy storage side is as follows:

in:

is the total compensation income of the energy storage combined with frequency regulation system on day i;

is the comprehensive performance index of the energy storage combined with frequency regulation system on day i;

is the frequency regulation depth of the energy storage combined frequency regulation system on day i;

It is the frequency modulation compensation standard.

The calculation method of the reduction benefit R _K of the power generation side assessment is as follows:

R _K =((98%-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P )×r _w

in:

K _A is the measured unit availability;

_PN is the unit capacity (MW);

∝ _{AGC, A} is the availability assessment coefficient, and its value is 1;

K _P is the measured unit regulation performance;

∝ _AGC,P is the adjustment performance assessment coefficient, and its value is 2;

r _w is the on-grid electricity price.

The calculation method of total coal consumption reduction benefit R _h is:

R _h =Q _d ×m×r _h

in:

Q _d is the total power generation during the regulation period;

m is the difference in coal consumption per kilowatt-hour;

r _h is the standard coal price.

The calculation method of the total frequency regulation cost reduction benefit _RC on the grid side is:

in:

It is the comprehensive performance index of the energy storage combined frequency regulation system when the energy storage unit i is not put into use;

is the regulation mileage of the energy storage combined frequency regulation system when the energy storage unit i is not put into use;

K _b is the compensation standard;

is the comprehensive performance index of the energy storage combined frequency regulation system when energy storage unit i is put into use;

is the regulation mileage of the energy storage combined frequency regulation system when energy storage unit i is put into use;

In this formula, n is the total number of units put into operation under different numbers of energy storage units. When the number of units put into operation is 1, 2, or 3, n=1, 2, or 3.

The calculation method of social environmental protection benefits R _S is:

m _h is the reduction of total coal consumption, W _i is the pollutant emission per kilogram of coal, and Y _i is the charging standard for pollutants emitted per kilogram of coal;

Table 1. Pollutants emitted by 1 kg of coal and the charging standards in a certain place

The calculation method of the benefit R _Z of energy storage combined with frequency regulation is:

R _Z =w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ;

w _j , j is 1-6, indicating the comprehensive weight of the indicator;

The calculation of the comprehensive weight of the indicators is calculated using the least squares decision model:

Calculate the objective function:

Limitations:

ω _j is the subjective preference weight;

μ _j is the objective weight;

b _ij is the standardized decision indicator vector.

In step S4, when optimizing the configuration of the energy storage combined frequency regulation system, the system comprehensive benefits of different numbers of energy storage units are compared, and the number with the highest system comprehensive benefit is selected as the number of energy storage combined frequency regulation systems that need to be set. For example, the system comprehensive benefits of three groups of energy storage units can be compared.

Example 2

This embodiment provides an operation effect evaluation system for energy storage participating in grid AGC regulation, as shown in FIG2 , including:

The first benefit calculation module includes a power generation side benefit calculation submodule, a grid side benefit calculation submodule and a social side benefit calculation submodule, which are used to calculate the benefits of the power generation side, the grid side and the social side for different energy storage combined frequency regulation systems;

The second profit calculation module is used to calculate the energy storage side profit according to the matching agreement between the energy storage device and the generator set and the power generation side profit;

The system comprehensive benefit calculation module is used to calculate the system comprehensive benefits of different energy storage combined frequency regulation systems based on the benefits of the power generation side, the grid side, the social side and the energy storage side;

The configuration optimization module is used to optimize the configuration of the energy storage combined frequency regulation system according to the calculated comprehensive benefits. When optimizing the configuration of the energy storage combined frequency regulation system, the system comprehensive benefits of different numbers of energy storage units are compared, and the number with the highest system comprehensive benefit is selected as the number of energy storage combined frequency regulation systems that need to be set. Usually, three groups of energy storage units can be compared.

The power generation side benefit calculation submodule is used to calculate the power generation side frequency regulation compensation benefit _RA , power generation coal consumption reduction benefit _Rh and power generation side assessment reduction benefit _RK ;

The grid-side revenue calculation submodule is used to calculate the grid-side total frequency regulation cost reduction revenue R _c ;

The social benefit calculation submodule is used to calculate the social environmental protection benefit R _S ;

The second benefit calculation module is used to calculate the energy storage side frequency regulation compensation benefit _RB ;

The benefits on the power generation side include the power generation side frequency regulation compensation benefits _RA , power generation coal consumption reduction benefits _Rh and power generation side assessment reduction benefits _RK ;

The revenue on the grid side is the revenue R _c from the reduction of the total frequency regulation cost on the grid side;

The social benefit is the social environmental benefit R _S ;

In the first income calculation module and the second income calculation module,

The frequency regulation compensation income R _A on the power generation side and the frequency regulation compensation income R _B on the energy storage side are calculated by collecting the total compensation income, comprehensive performance indicators and frequency regulation depth of the energy storage combined frequency regulation system, and based on the frequency regulation compensation income on the power generation side and the profit sharing ratio of the signed power generation units and energy storage equipment;

The reduction benefit R _K of the power generation side assessment is calculated by collecting the measured unit availability, unit capacity and measured unit regulation performance;

The benefit of reducing coal consumption for power generation R _h is calculated by collecting the total power generation during the regulation period;

The total frequency regulation cost reduction benefit R _c on the grid side is calculated by collecting the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is not put into use and the comprehensive performance indicators and regulation mileage of the energy storage combined frequency regulation system when the energy storage unit is put into use;

The social and environmental benefits _RS are calculated by collecting and reducing the total coal consumption.

The calculation methods of the frequency regulation compensation income _RA on the power generation side and the frequency regulation compensation income _RB on the energy storage side are as follows:

in:

is the total compensation income of the energy storage combined with frequency regulation system on day i;

is the comprehensive performance index of the energy storage combined with frequency regulation system on day i;

is the frequency regulation depth of the energy storage combined frequency regulation system on day i;

It is the frequency modulation compensation standard;

The revenue sharing ratio of the frequency regulation compensation on the power generation side and the revenue of the contracted power generation units and energy storage equipment is p ₁ :p ₂ .

The calculation method of the reduction benefit R _K of the power generation side assessment is as follows:

R _K =((98%-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P )×r _w

in:

K _A is the measured unit availability;

_PN is the unit capacity (MW);

∝ _{AGC, A} is the availability assessment coefficient, and its value is 1;

K _P is the measured unit regulation performance;

∝ _AGC,P is the adjustment performance assessment coefficient, and its value is 2;

r _w is the on-grid electricity price.

The calculation method of total coal consumption reduction benefit R _h is:

R _h =Q _d ×m×r _h

in:

Q _d is the total power generation during the regulation period;

m is the difference in coal consumption per kilowatt-hour;

r _h is the standard coal price;

The calculation method of the total frequency regulation cost reduction benefit _RC on the grid side is:

in:

is the comprehensive performance index of the combined frequency regulation system i without energy storage;

is the regulation mileage of the energy storage combined frequency regulation system i without investment;

K _b is the compensation standard;

It is the comprehensive performance index of energy storage combined with frequency regulation system i;

The regulation mileage of the energy storage combined frequency regulation system i;

n is the total number of units put into operation under different energy storage units;

The calculation method of social environmental protection benefits R _S is:

m _h is the reduction of total coal consumption, W _i is the pollutant emission per kilogram of coal, and Y _i is the charging standard for pollutants emitted per kilogram of coal;

The calculation method of the benefit R _Z of energy storage combined with frequency regulation is:

R _Z =w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ;

w _j , j is 1-6, indicating the comprehensive weight of the indicator;

The calculation of the comprehensive weight of the indicators is calculated using the least squares decision model:

Calculate the objective function:

Limitations:

ω _j is the subjective preference weight;

μ _j is the objective weight;

b _ij is the standardized decision indicator.

It is worth mentioning that

The calculation method of the comprehensive performance index of the jth regulation response is as follows:

in: The comprehensive performance index of energy storage combined frequency regulation system i for the jth adjustment; is the regulation speed index of the jth regulation of energy storage combined frequency regulation system i; is the regulation accuracy index of the j-th regulation of the energy storage combined frequency regulation system i; It is the response time index of the j-th regulation of the energy storage combined frequency regulation system i.

a. The adjustment speed index is calculated as follows:

Among them: V _Ni is the standard regulation rate of the thermal power generating unit in the energy storage combined frequency regulation; _Vij is the actual regulation rate of the energy storage combined frequency regulation system i for the jth regulation.

b. The adjustment accuracy index is calculated as follows:

Where: ΔP _ij is the adjustment deviation of the energy storage combined frequency regulation system i for the jth adjustment; the allowable adjustment deviation is 1% of the rated active power of the thermal power generating units involved in the adjustment.

c. The response time indicator is calculated as follows:

Where: Δt _ij is the response time of the energy storage combined frequency regulation system i for the jth adjustment; the standard response time is 1 minute.

The daily average comprehensive performance index is calculated as follows:

Generally speaking, the dispatching agency adopts the method of daily settlement and monthly settlement, so the performance indicators of the whole day are used to determine the frequency regulation capability of the system.

in: It is the average value of comprehensive performance indicators of energy storage combined frequency regulation system participating in frequency regulation n times within the mth day.

Regulation depth calculation. Regulation depth refers to the absolute value of the difference between the output of the energy storage combined frequency regulation system when it meets the requirements of the automatic generation control signal and when the automatic generation control signal arrives.

a. The adjustment depth of the jth adjustment response.

in: is the specified value of automatic generation control dispatched when the energy storage system i responds for the jth time ^; _Pij is the current output of the energy storage system i for the jth response.

b. Depth of regulation for all-day response.

Where: n is the total number of responses in one day; Specify the value of automatic generation control for the energy storage system i at the jth response on the mth day; is the current output of the energy storage system i at the jth response on the mth day.

Example 3

This embodiment provides a computer-readable storage medium storing computer-executable instructions. When the computer-executable instructions are executed by a processor, the processor executes the method for evaluating the operating effect of energy storage participating in grid AGC regulation as described in Embodiment 1.

Based on the above ideal embodiments of this application, the relevant staff can make various changes and modifications without departing from the technical concept of this application through the above description. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

The present application is described with reference to the flowchart and/or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each process and/or box in the flowchart and/or block diagram, and the combination of the process and/or box in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one process or multiple processes in the flowchart and/or one box or multiple boxes in the block diagram.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Claims (3)

1. The operation effect evaluation method for the energy storage participation in the AGC regulation of the power grid is characterized by comprising the following steps of:

aiming at different energy storage joint frequency modulation systems, the benefits of a power generation side, a power grid side and a society side are calculated respectively;

calculating the energy storage side benefit according to the proportioning protocol of the energy storage equipment and the generator set and the power generation side benefit;

aiming at different energy storage joint frequency modulation systems, calculating system comprehensive benefits according to the benefits of the power generation side, the power grid side and the social side and the benefits of the energy storage side;

optimizing and configuring the energy storage joint frequency modulation system according to the calculated comprehensive benefits of the system;

the generating side benefits include generating side frequency modulation compensation benefits R _A Reducing the coal consumption of power generation and obtaining benefits R _h And generating side qualification reducing benefits R _K ；

The profit on the power grid side is the total frequency modulation expense reduction profit R on the power grid side _c ；

Social side benefits are social environment-friendly benefits R _S ；

The calculation method comprises the following steps:

collecting total compensation benefits, comprehensive performance indexes and frequency modulation depth of the energy storage combined frequency modulation system, and calculating the frequency modulation compensation benefits R of the power generation side according to the frequency modulation compensation benefits of the power generation side and the signed benefits of the power generation unit and the energy storage equipment _A And energy storage side frequency modulation compensation gain R _B ；

Collecting the actual measurement unit availability, unit capacity and actual measurement unit regulation performance to calculate power generation side assessment reduction benefits R _K ；

Collecting total generated energy during adjustment to calculate generation coal consumption reduction benefits R _h ；

Collecting comprehensive performance indexes and adjustment mileage of an energy storage combined frequency modulation system when an energy storage unit is not put into the energy storage system, and calculating total frequency modulation cost reduction income R at the power grid side by the comprehensive performance indexes and adjustment mileage of the energy storage combined frequency modulation system when the energy storage unit is put into the energy storage system _c ；

Collecting and reducing total coal consumption to calculate social environmental protection benefits R _S

Generating side frequency modulation compensation gain R _A And energy storage side frequency modulation compensation gain R _B The calculation method comprises the following steps:

wherein:

the total compensation income of the energy storage combined frequency modulation system i on the m th day;

the comprehensive performance index of the energy storage combined frequency modulation system i on the m th day;

the frequency modulation depth of the mth day of the energy storage combined frequency modulation system i;

is a frequency modulation compensation standard;

generating side frequency modulation compensation income and income of signed generating set and energy storage equipment are divided into a ratio p ₁ ：p ₂ ；

The power generation side check reduces the income R _K The calculation method of (2) is as follows:

R _K ＝((98％-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P )×rw

wherein:

K _A the availability of the unit is measured;

P _N for unit capacity (MW);

∝ _AGC,A the availability checking coefficient is the availability checking coefficient, and the numerical value is 1;

K _P the performance is adjusted for the actual measurement unit;

∝ _AGC,P for adjustingThe section performance checking coefficient is 2;

r _w the online electricity price is obtained;

the total coal consumption reduces the income R _h The calculation method of (1) is as follows:

R _h ＝Q _d ×m×r _h

wherein:

Q _d for regulating the total power generation during the period;

m is the electricity coal consumption difference value of each degree;

r _h is the standard coal price;

the total frequency modulation expense on the power grid side reduces the income R _C The calculation method of (1) is as follows:

wherein:

the comprehensive performance index of the energy storage combined frequency modulation system i is not input;

the mileage is adjusted for the energy storage combined frequency modulation system i which is not put into;

K _b is a compensation standard;

the comprehensive performance index of the energy storage combined frequency modulation system i is input;

the mileage is adjusted for putting into the energy storage combined frequency modulation system i;

n is the total number of the input quantity of the different energy storage units;

the social environmental benefit R _S The calculation method of (1) is as follows:

m _h w for reducing total coal consumption _i For kg coal pollutant discharge amount, Y _i Charge standards for the pollutant emissions from kg coal,

during the calculation of the comprehensive benefits of the system, the frequency modulation compensation benefits R of the power generation side are determined first _A Energy storage side frequency modulation compensation gain R _B Generating side qualification reducing benefits R _K Generating coal consumption reduction benefit R _h Grid side total frequency modulation cost reduction benefit R _c Social environmental benefit R _S Is a comprehensive weight of the index of (2);

energy storage joint frequency modulation application benefit R _Z The calculation method comprises the following steps:

R _Z ＝w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ；

wj, j is 1-6, representing the index comprehensive weight,

the calculation of the index comprehensive weight adopts a least square method decision model to calculate:

the calculated objective function:

the limiting conditions are as follows:

ω _j is subjective preference weight;

μ _j is an objective weight;

b _ij for the purpose of standardizing the decision index,

when the energy storage combined frequency modulation system is optimally configured, the comprehensive benefits of the energy storage units with different numbers are compared, and the number with the highest comprehensive benefit of the energy storage units is selected as the number required to be set by the energy storage combined frequency modulation system.

2. An operational effect evaluation system for energy storage participating in AGC regulation of a power grid, comprising:

the first benefit computing module comprises a power generation side benefit computing sub-module, a power grid side benefit computing sub-module and a social side benefit computing sub-module, and is used for computing the benefits of the power generation side, the power grid side and the social side for different energy storage joint frequency modulation systems;

the second benefit calculating module is used for calculating the benefit of the energy storage side according to the proportioning protocol of the energy storage equipment and the generator set and the benefit of the power generation side;

the system comprehensive benefit calculation module is used for calculating system comprehensive benefits according to the benefits of the power generation side, the power grid side and the social side and the benefits of the energy storage side aiming at different energy storage combined frequency modulation systems;

the configuration optimizing module is used for optimizing and configuring the energy storage joint frequency modulation system according to the calculated comprehensive benefit,

the power generation side gain calculation submodule is used for calculating power generation side frequency modulation compensation gain R _A Reducing the coal consumption of power generation and obtaining benefits R _h And generating side qualification reducing benefits R _K ；

The power grid side income calculation sub-module is used for calculating the total frequency modulation expense reduction income R of the power grid side _c ；

Social side benefit computing sub-module for computing social environment-friendly benefits R _S ；

The second profit calculation module is used for calculating the energy storage side frequency modulation compensation profit R _B ；

In the first benefit computing module and the second benefit computing module,

generating side frequency modulation compensation gain R _A And energy storage side frequency modulation compensation gain R _B By collecting the total compensation income, the comprehensive performance index and the frequency modulation depth of the energy storage combined frequency modulation system, andcalculating according to the frequency modulation compensation income of the power generation side and the income dividing ratio of the signed generating set and the energy storage equipment;

generating side qualification reducing revenue R _K Calculating by collecting the actual measurement unit availability, unit capacity and actual measurement unit regulation performance;

generating coal consumption reduction benefits R _h Calculating by collecting the total power generation amount during the adjustment period;

grid side total frequency modulation cost reduction revenue R _c The comprehensive performance index and the adjustment mileage of the energy storage combined frequency modulation system when the energy storage unit is not input are acquired and calculated;

social environmental benefit R _S The total coal consumption is reduced through collection for calculation,

generating side frequency modulation compensation gain R _A And energy storage side frequency modulation compensation gain R _B The calculation method comprises the following steps:

wherein:

the total compensation income of the energy storage combined frequency modulation system i on the m th day;

day i of energy storage combined frequency modulation systemIs a comprehensive performance index of (1);

the frequency modulation depth of the mth day of the energy storage combined frequency modulation system i;

is a frequency modulation compensation standard;

generating side frequency modulation compensation income and income of signed generating set and energy storage equipment are divided into a ratio p ₁ ：p ₂ ；

The power generation side check reduces the income R _K The calculation method of (2) is as follows:

R _K ＝((98％-K _A )×P _N ×∝ _AGC,A +(1-K _P )×P _N ×∝ _AGC,P ) X rw wherein:

K _A the availability of the unit is measured;

P _N for unit capacity (MW);

∝ _AGC,A the availability checking coefficient is the availability checking coefficient, and the numerical value is 1;

K _P the performance is adjusted for the actual measurement unit;

∝ _AGC,P in order to adjust the performance checking coefficient, the numerical value is 2;

r _w the online electricity price is obtained;

the total coal consumption reduces the income R _h The calculation method of (1) is as follows:

R _h ＝Q _d ×m×r _h

wherein:

Q _d for regulating the total power generation during the period;

m is the electricity coal consumption difference value of each degree;

r _h is the standard coal price;

the total frequency modulation expense on the power grid side reduces the income R _C The calculation method of (1) is as follows:

wherein:

the comprehensive performance index of the energy storage combined frequency modulation system i is not input;

the mileage is adjusted for the energy storage combined frequency modulation system i which is not put into;

K _b is a compensation standard;

the comprehensive performance index of the energy storage combined frequency modulation system i is input;

the mileage is adjusted for putting into the energy storage combined frequency modulation system i;

n is the total number of the input quantity of the different energy storage units;

the social environmental benefit R _S The calculation method of (1) is as follows:

m _h w for reducing total coal consumption _i For kg coal pollutant discharge amount, Y _i Charge standards for pollutants emitted by kg coal;

during the calculation of the comprehensive benefits of the system, the frequency modulation compensation benefits R of the power generation side are determined first _A Energy storage side frequency modulation compensation gain R _B Generating side qualification reducing benefits R _K Generating coal consumption reduction benefit R _h Grid side total frequency modulation cost reduction benefit R _c Social environmental benefit R _S Is a comprehensive weight of the index of (2);

energy storage joint frequency modulation application benefit R _Z The calculation method comprises the following steps:

R _Z ＝w ₁ ×R _A +w ₂ ×R _B +w ₃ ×R _K +w ₄ ×R _h +w ₅ ×R _C +w ₆ ×R _S ；

wj, j is 1-6, and represents the index comprehensive weight;

the calculation of the index comprehensive weight adopts a least square method decision model to calculate:

the calculated objective function:

the limiting conditions are as follows:

ω _j is subjective preference weight;

μ _j is an objective weight;

b _ij is a standardized decision index;

when the energy storage combined frequency modulation system is optimally configured, the comprehensive benefits of the energy storage units with different numbers are compared, and the number with the highest comprehensive benefit of the energy storage units is selected as the number required to be set by the energy storage combined frequency modulation system.

3. A computer-readable storage medium, characterized in that computer-executable instructions are stored, which, when executed by a processor, perform the method for evaluating the operational effect of the energy storage participation grid AGC regulation of any one of claims 1.