CN117613963A

CN117613963A - Control method and control system of energy storage power station

Info

Publication number: CN117613963A
Application number: CN202311641149.3A
Authority: CN
Inventors: 孟鹏飞; 张小景; 陈祯; 王超
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: Sungrow Power Supply Co Ltd
Priority date: 2023-11-29
Filing date: 2023-11-29
Publication date: 2024-02-27

Abstract

The application relates to a control method of an energy storage power station, a control system of the energy storage power station, computer equipment and a storage medium. The method is applied to a control system of an energy storage power station, the energy storage power station is electrically connected with a power grid, and the method comprises the following steps: in response to receiving a power scheduling instruction of the power grid, determining a target scheduling type and a scheduling power value corresponding to the power scheduling instruction; determining a load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period and a power parameter value of the power grid; and determining a target power value according to the load power value, the loss power value and the scheduling power value, and controlling the energy storage power station to output power to the power grid according to the target power value. By adopting the method, the response time of the energy storage power station can be reduced, and the efficiency is improved.

Description

Control method and control system of energy storage power station

Technical Field

The present application relates to the field of electric power grid technology, and in particular, to a control method of an energy storage power station, a control system of the energy storage power station, a computer device, a storage medium and a computer program product.

Background

An energy storage power station is a facility that is capable of converting electrical energy into other forms of energy and back into electrical energy when needed. The energy storage power station control system can adjust the output power of the energy storage power station according to the requirements of the power grid so as to meet the load requirements of the power grid.

In general, an energy storage power station control system controls the output power of an energy storage power station to a power grid according to the power required by the power grid. However, due to line loss and power consumption in the energy storage power station, the output power of the energy storage power station needs to be larger than the power required by the power grid, so that the load demand of the power grid can be met only after the output power of the energy storage power station is regulated for many times according to the detected power of the grid-connected point, the response time of the energy storage power station is long, and the efficiency is low.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a control method of an energy storage power station, a control system of an energy storage power station, a computer device, a computer readable storage medium and a computer program product that can reduce the response time of the energy storage power station and improve the power output efficiency.

In a first aspect, the present application provides a control method of an energy storage power station, where the method is applied to a control system of the energy storage power station, and the energy storage power station is electrically connected to a power grid, and includes:

In response to receiving a power scheduling instruction of the power grid, determining a target scheduling type and a scheduling power value corresponding to the power scheduling instruction;

determining a load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period and a power parameter value of the power grid, wherein the target impedance parameter value is determined according to historical power parameter data of the energy storage power station matched with the target scheduling type and the power grid;

and determining a target power value according to the load power value, the loss power value and the scheduling power value, and controlling the energy storage power station to output power to the power grid according to the target power value, wherein the loss power value is calculated based on the target impedance parameter value.

In one embodiment, the scheduling type includes an active power scheduling type, the impedance parameter value includes a resistance value, and determining the load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and a power parameter value of the power grid includes:

Acquiring a resistance value of the energy storage power station under the condition that the target scheduling type is an active power scheduling type, wherein the resistance value is determined according to historical active power parameter data of the energy storage power station and the power grid;

acquiring an active power parameter value of the energy storage power station in a preset period of time and an active power parameter value of the power grid;

and determining the load power value of the energy storage power station according to the active power parameter value of the energy storage power station, the active power parameter value of the power grid and the resistance value.

In one embodiment, the determining the load power value of the energy storage power station according to the active power parameter value of the energy storage power station, the active power parameter value of the power grid and the resistance value includes:

and determining a first difference value between the active power value of the energy storage power station and the active power value of the grid connection point of the power grid, and determining a second difference value between the first difference value and the loss power value as a load power value of the energy storage power station, wherein the loss power value is calculated based on the resistance value.

In one embodiment, the determining manner of the loss power value includes:

Determining a grid-connected point current value according to the grid-connected point active power value of the power grid, the grid-connected point reactive power value of the power grid and the grid-connected point voltage value of the power grid;

and determining a loss power value according to the grid-connected point current value and the resistance value.

In one embodiment, the determining the resistance value includes:

constructing a relation among active power parameters of the energy storage power station, active power parameters of the power grid and resistance of the energy storage power station;

acquiring historical active power parameter data of the energy storage power station and the power grid;

and carrying the historical active power parameter data into the relational expression to obtain the resistance value of the energy storage power station.

In one embodiment, the historical active power parameter data includes a historical active power value of the energy storage power station, a historical grid-connected active power value of the power grid, a historical grid-connected reactive power value of the power grid, and a historical grid-connected voltage value of the power grid;

the building of the relation among the active power parameters of the energy storage power station, the active power parameters of the power grid and the resistance of the energy storage power station comprises the following steps:

And constructing a relation according to the association relation among the active power of the energy storage power station, the active power of the grid connection point of the power grid, the loss power and the load power, wherein the difference between the active power of the energy storage power station and the active power of the grid connection point is equal to the sum of the loss power and the load power, and the loss power is obtained based on the active power of the grid connection point of the power grid, the reactive power of the grid connection point of the power grid, the voltage of the grid connection point of the power grid and the resistance of the energy storage power station.

In one embodiment, the scheduling type includes a reactive power scheduling type, the impedance parameter value includes a leakage reactance value, and determining the load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and a power parameter value of the power grid includes:

obtaining a leakage reactance value of the energy storage power station under the condition that the target scheduling type is a reactive power scheduling type, wherein the leakage reactance value is determined according to historical reactive power parameter data of the energy storage power station and the power grid;

Acquiring a reactive power parameter value of the energy storage power station in a preset period of time and a reactive power parameter value of the power grid;

and determining the load power value of the energy storage power station according to the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid and the leakage reactance value.

In one embodiment, the determining the load power value of the energy storage power station according to the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid and the leakage reactance value comprises:

and determining a third difference value of the reactive power value of the energy storage power station and the reactive power value of the grid connection point of the power grid, and determining a fourth difference value between the third difference value and a loss power value as a load power value of the energy storage power station, wherein the loss power value is calculated based on the leakage reactance value.

In one embodiment, the determining manner of the loss power value includes:

and determining a loss power value according to the grid-connected point current value and the leakage reactance value.

In one embodiment, the determining the leakage reactance value includes:

constructing a relation among reactive power parameters of the energy storage power station, reactive power parameters of the power grid and leakage reactance of the energy storage power station;

acquiring historical reactive power parameter data of the energy storage power station and the power grid;

and carrying the historical reactive power parameter data into the relational expression to obtain the leakage reactance value of the energy storage power station.

In one embodiment, the historical reactive power parameter data includes a historical reactive power value of the energy storage power station, a historical grid-connected point active power value of the power grid, a historical grid-connected point reactive power value of the power grid, and a historical grid-connected point voltage value of the power grid;

the building of the relation between the reactive power parameter of the energy storage power station, the reactive power parameter of the power grid and the leakage reactance of the energy storage power station comprises the following steps:

and constructing a relational expression according to the association relation among the reactive power of the energy storage power station, the grid-connected point reactive power of the power grid, the loss power and the load power, wherein the difference between the reactive power of the energy storage power station and the grid-connected point reactive power is equal to the sum of the loss power and the load power, and the loss power is obtained based on the grid-connected point active power of the power grid, the grid-connected point reactive power of the power grid, the grid-connected point voltage of the power grid and the leakage reactance of the energy storage power station.

In one embodiment, the method for obtaining the historical power parameter data includes:

determining the electricity utilization period of the energy storage power station according to the operation parameters of the energy storage power station;

and acquiring historical power parameter data corresponding to a plurality of power utilization periods from the power parameter data in the preset historical period.

In a second aspect, the present application further provides a control system of an energy storage power station, wherein the energy storage power station is electrically connected to a power grid, the control system comprising:

the response module is used for responding to the received power scheduling instruction of the power grid and determining a target scheduling type and a scheduling power value corresponding to the power scheduling instruction;

the determining module is used for determining a load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period and a power parameter value of the power grid, wherein the target impedance parameter value is determined according to historical power parameter data of the energy storage power station matched with the target scheduling type and the power grid;

The control module is used for determining a target power value according to the load power value, the loss power value and the scheduling power value, controlling the energy storage power station to output power to the power grid according to the target power value, and calculating the loss power value based on the target impedance parameter value.

In one embodiment, the scheduling type includes an active power scheduling type, the impedance parameter value includes a resistance value, and the determining module includes:

the first acquisition submodule is used for acquiring a resistance value of the energy storage power station under the condition that the target scheduling type is an active power scheduling type, wherein the resistance value is determined according to historical active power parameter data of the energy storage power station and the power grid;

the second acquisition submodule is used for acquiring the active power parameter value of the energy storage power station and the active power parameter value of the power grid in a preset period;

and the first determining submodule is used for determining the load power value of the energy storage power station according to the active power parameter value of the energy storage power station, the active power parameter value of the power grid and the resistance value.

In one embodiment, the first determining sub-module includes:

The first determining unit is used for determining a first difference value between the active power value of the energy storage power station and the active power value of the grid connection point of the power grid, and determining a second difference value between the first difference value and the loss power value as the load power value of the energy storage power station, wherein the loss power value is calculated based on the resistance value.

In one embodiment, the control system of the energy storage system further includes a loss power value determining module, where the loss power value determining module includes:

the second determining unit is used for determining a grid-connected point current value according to the grid-connected point active power value of the power grid, the grid-connected point reactive power value of the power grid and the grid-connected point voltage value of the power grid;

and the third determining unit is used for determining a loss power value according to the grid-connected point current value and the resistance value.

In one embodiment, the control system of the energy storage system further includes a module for determining the resistance value, and the module for determining the resistance value includes:

the first construction unit is used for constructing a relational expression among the active power parameters of the energy storage power station, the active power parameters of the power grid and the resistance of the energy storage power station;

The first acquisition unit is used for acquiring historical active power parameter data of the energy storage power station and the power grid;

and the first carrying-in unit is used for carrying the historical active power parameter data into the relational expression to obtain the resistance value of the energy storage power station.

the first building unit includes:

the first construction subunit is configured to construct a relational expression according to an association relationship between the active power of the energy storage power station, the active power of the grid-connected point of the power grid, the loss power, and the load power, where the difference between the active power of the energy storage power station and the active power of the grid-connected point is equal to the sum of the loss power and the load power, and the loss power is obtained based on the active power of the grid-connected point of the power grid, the reactive power of the grid-connected point of the power grid, the voltage of the grid-connected point of the power grid, and the resistance of the energy storage power station.

In one embodiment, the dispatch type includes a reactive power dispatch type, the impedance parameter value includes a leakage reactance value, and the determining module includes:

The third acquisition sub-module is used for acquiring the leakage reactance value of the energy storage power station under the condition that the target dispatching type is a reactive power dispatching type, wherein the leakage reactance value is determined according to historical reactive power parameter data of the energy storage power station and the power grid;

a fourth obtaining submodule, configured to obtain a reactive power parameter value of the energy storage power station and a reactive power parameter value of the power grid within a preset period;

and the second determining submodule is used for determining the load power value of the energy storage power station according to the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid and the leakage reactance value.

In one embodiment, the second determining sub-module includes:

and the fourth determining unit is used for determining a third difference value between the reactive power value of the energy storage power station and the reactive power value of the grid connection point of the power grid, determining a fourth difference value between the third difference value and a loss power value as a load power value of the energy storage power station, and calculating the loss power value based on the leakage reactance value.

In one embodiment, the control system of the energy storage power station further includes a loss power value determining module, where the loss power value determining module includes:

A fifth determining unit, configured to determine a grid-connected point current value according to the grid-connected point active power value of the power grid, the grid-connected point reactive power value of the power grid, and the grid-connected point voltage value of the power grid;

and a sixth determining unit, configured to determine a loss power value according to the grid-connected point current value and the leakage reactance value.

In one embodiment, the control system of the energy storage system further includes a module for determining the leakage reactance value, and the module for determining the leakage reactance value includes:

the second construction unit is used for constructing a relational expression among the reactive power parameters of the energy storage power station, the reactive power parameters of the power grid and the leakage reactance of the energy storage power station;

the second acquisition unit is used for acquiring historical reactive power parameter data of the energy storage power station and the power grid;

and the second carrying-in unit is used for carrying the historical reactive power parameter data into the relational expression to obtain the leakage reactance value of the energy storage power station.

The second building unit includes:

the second construction subunit is configured to construct a relational expression according to a correlation between reactive power of the energy storage power station, grid-connected point reactive power of the power grid, loss power and load power, where a difference between the reactive power of the energy storage power station and the grid-connected point reactive power is equal to a sum of the loss power and the load power, and the loss power is obtained based on the grid-connected point active power of the power grid, the grid-connected point reactive power of the power grid, the grid-connected point voltage of the power grid and leakage reactance of the energy storage power station.

In one embodiment, the control system of the energy storage power station further includes an acquisition module of the historical power parameter data, the acquisition module of the historical power parameter data includes:

a third determining sub-module for determining a power cycle of the energy storage power station according to the operating parameters of the energy storage power station;

and a fifth acquisition sub-module, configured to acquire historical power parameter data corresponding to a plurality of power utilization periods from the power parameter data in the preset historical period.

In a third aspect, embodiments of the present disclosure also provide a computer device. The computer device comprises a memory storing a computer program and a processor implementing the steps of the method of any of the embodiments of the present disclosure when the computer program is executed.

In a fourth aspect, embodiments of the present disclosure also provide a computer-readable storage medium. The computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of any of the embodiments of the present disclosure.

In a fifth aspect, embodiments of the present disclosure also provide a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of the method according to any of the embodiments of the present disclosure.

The embodiment of the disclosure provides a control method of an energy storage power station, which is applied to a control system of the energy storage power station, responds to a power scheduling instruction of a power grid, determines a target scheduling type and a scheduling power value corresponding to the power scheduling instruction, determines a load power value of the energy storage power station according to a target impedance parameter value corresponding to the target scheduling type, a power parameter value of the energy storage power station and the power grid, which are matched with the target scheduling type within a preset period, determines the target power value according to the load power value, the loss power value and the scheduling power value, and controls the energy storage power station to output power to the power grid according to the target power value. In the embodiment, the impedance parameter value and the load power value are determined firstly according to the historical data and the data in the preset period of time in consideration of the impedance and the load power of the energy storage power station, so that the target power value is determined rapidly and accurately according to the scheduling power value of the power scheduling instruction, the output power value of the energy storage power station is not required to be adjusted repeatedly according to the actual power value received by the power grid, the response time of the energy storage power station to the power scheduling instruction is reduced, and the efficiency and the accuracy of power output are improved; the impedance parameter value is obtained based on the historical power parameter data, the impedance parameter value can be used for calculating the loss power value in the subsequent control process, the load power value is determined based on the parameter in the preset period, the change characteristics of the impedance parameter and the load power are considered, the accuracy of the calculated target impedance parameter value and the accuracy of the load power value are further improved, the accuracy of the output power of the energy storage power station is effectively improved, the target power value required to be output by the energy storage power station can be calculated at one time according to the power scheduling instruction, and the method is suitable for more application scenes.

Drawings

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

FIG. 1 is an application environment diagram of a method of controlling an energy storage power station in one embodiment;

FIG. 2 is a flow chart of a method of controlling an energy storage power station according to one embodiment;

FIG. 3 is a flow chart of a method of controlling an energy storage power station according to one embodiment;

FIG. 4 is a flow chart of a method of controlling an energy storage power station according to one embodiment;

FIG. 5 is a flow chart of a method of controlling an energy storage power station according to one embodiment;

FIG. 6 is a flow chart of a method of controlling an energy storage power station according to one embodiment;

FIG. 7 is a block diagram of a power conversion system of an energy storage power station in one embodiment;

fig. 8 is an internal structural diagram of a computer device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The control method of the energy storage power station provided by the embodiment of the application can be applied to an application environment shown in fig. 1. Referring to fig. 1, an energy storage power station may store electrical energy through an energy storage system, and a PCS (collectively Power Conversion System, i.e., a power conversion system) is a core control system of the energy storage power station. The electric energy of the energy storage system can be boosted to 220kv through PCS and two-stage boosting (namely a medium-voltage module and a main transformer module). The control system can control the output of the energy storage power station according to the power demand of the power grid, and in this embodiment, the control system of the energy storage power station includes, but is not limited to, a PCS, a medium voltage module, a main transformer module, and the like. The current collecting circuit is arranged between the medium-voltage module and the main transformer module, and can collect electric energy output by medium voltage and transmit the electric energy to the main transformer for transformation. Auxiliary electricity refers to the auxiliary power requirements within the energy storage power plant for operating and controlling the equipment. Reactive power compensation of the load of the factory is to compensate reactive power of a generator and other equipment in the energy storage power station. PoC is a grid-on-grid point whose power parameters can be used to represent the power received by the grid from the energy storage power station.

In an exemplary embodiment, as shown in fig. 2, there is provided a control method of an energy storage power station, where the method is applied to a control system of the energy storage power station, and the energy storage power station is electrically connected to a power grid, and includes:

Step S210, in response to receiving a power scheduling instruction of the power grid, determining a target scheduling type and a scheduling power value corresponding to the power scheduling instruction;

in the embodiment of the disclosure, the energy storage power station comprises a control system, the energy storage power station is electrically connected with the power grid, and the control system can adjust the output power of the energy storage power station according to the requirement of the power grid so as to meet the load requirement of the power grid. In one example, a control system may include, but is not limited to, a PCS, a medium voltage module, a voltage transformation module, and the like. Under different power demand scenes, the energy storage power station can output different power to the power grid, and in the embodiment, the power demand of the power grid can be determined according to the power scheduling instruction of the power grid. And in response to receiving the power dispatching instruction of the power grid, determining a target dispatching type and a dispatching power value corresponding to the power dispatching instruction. In one example, the power scheduling command may be a power value required by a grid-connected point, where the grid-connected point is a connection point between the energy storage power station and the power grid, and the power value received by the power grid may be controlled by adjusting the power value of the grid-connected point, for example, the power scheduling command may be a power value, and it may be considered that the power of the grid-connected point needs to be a through the output of the energy storage power station. In one example, the scheduling type may be a power type division of the power demand of the power grid, for example, the scheduling type may include an active power scheduling type, a reactive power scheduling type, and a hybrid power scheduling type, and the energy storage power station outputs active power and/or reactive power to the power grid according to the scheduling type corresponding to the power scheduling instruction. In an example, when the target scheduling type corresponds to the hybrid power scheduling type, a corresponding scheduling active power value and a corresponding scheduling reactive power value may be determined according to the received power scheduling instruction, and a target active power value and a target reactive power value are obtained according to the method described in this embodiment, and the target active power value and the target reactive power value are output to a power grid, where a method for determining the target active power value and the target reactive power value is similar to the method described in the embodiment described below, and will not be repeated herein; further, in the mixed power scheduling type scenario, a power output mode can be set according to actual application requirements, and a target active power value and a target reactive power value are combined according to a preset power output mode and output. Under different application scenarios, the power values required by the power grid are different, the scheduling power value can be determined according to the power value required by the power grid, and a corresponding power scheduling instruction is sent to the energy storage power station. In one example, the power dispatching command of the power grid may be a dispatching center of the power system, which is responsible for performing real-time operation monitoring and dispatching control on the power system, where the dispatching center of the power system may formulate and issue the power dispatching command to the energy storage power station according to information such as an operation state, a load demand, an operation condition of the generator set, and the like of the power system.

Step S220, determining a load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and a power parameter value of the power grid, wherein the target impedance parameter value is determined according to historical power parameter data of the energy storage power station matched with the target scheduling type and the power grid;

in the embodiment of the disclosure, a corresponding target impedance parameter value is determined according to a target scheduling type, a power parameter value of an energy storage power station matched with the target scheduling type in a preset period and a power parameter value of a power grid are obtained, and a load power value of the energy storage power station is determined by combining the target impedance parameter value. The load power value of the energy storage power station is the load in the station of the energy storage power station, and in a normal condition, electric equipment in the energy storage power station also consumes electricity in the operation process of the energy storage power station, such as domestic electricity in the energy storage power station, electricity consumption of operation and maintenance equipment, and electricity consumption of electric equipment such as liquid cooling and fans of the energy storage system. The preset period may be set according to an actual application scenario, and in one example, the preset period may be set to a period from a historical time of a preset duration before the power scheduling instruction is received to the time when the power scheduling instruction is received, for example, the preset period may be set to 1 minute before the power scheduling instruction is received. The power parameter values of the energy storage power station may include, but are not limited to, an output active power value, an output reactive power value, an output voltage value, an output current value, and the like of the energy storage power station, and the power parameter values of the power grid may include, but are not limited to, an active power value, a reactive power value, a voltage value, a current value, and the like of a grid-connected point of the power grid, where the grid-connected point of the power grid refers to a node or an access point where the energy storage power station is connected to the power grid, and in general, the power of the grid-connected point may be regarded as the power received by the power grid from the energy storage power station.

In this embodiment, the target impedance parameter value is determined according to historical power parameter data of the energy storage power station and the power grid, which are matched with the target scheduling type, where the impedance parameter may be used to calculate power loss between the energy storage power station and the power grid, and power loss during different types of power transmission is determined according to different types of impedance parameters, for example, active power loss may be obtained through resistance calculation, and reactive power loss may be obtained through leakage reactance calculation. Since different scheduling types may correspond to different types of impedance parameters, different impedance parameter values may be determined for historical power parameter data that is matched based on their corresponding scheduling types, e.g., resistance values may be determined for historical active power parameter data that is passed through the energy storage power station and the power grid, and leakage reactance values may be determined for historical reactive power parameter data that is passed through the energy storage power station and the power grid. In one possible implementation, the historical power parameter data may include a plurality of sets of historical power parameter values, and according to the plurality of sets of historical power parameter values, a corresponding impedance parameter value may be obtained by fitting in combination with a relationship between the power parameter and the impedance parameter; in one example, according to the relation between the parameters in the circuit, the relation between the impedance parameter and the load power can be established simultaneously, the relation is brought by using multiple groups of historical power parameter data, the impedance parameter value can be obtained through fitting according to the change rule of the load power, for example, the load power can be in periodic normal distribution, and therefore, the impedance parameter value can be obtained through fitting.

In this embodiment, it is considered that the impedance parameter value is greatly affected by the device itself, and has small variation, and in general, the impedance parameter value is a relatively fixed value, so that the impedance parameter value is calculated according to the historical data; correspondingly, the load power value is calculated by combining the power parameter value in the preset time period after the power scheduling instruction is received in consideration of the fact that the load power value is greatly influenced by the running condition and has large change.

Step S230, determining a target power value according to the load power value, the loss power value, and the scheduling power value, and controlling the energy storage power station to output power to the power grid according to the target power value, where the loss power value is calculated based on the target impedance parameter value.

In the embodiment of the disclosure, the target power value is obtained by calculation according to the load power value, the loss power value and the scheduling power value, and the energy storage power station is controlled to output power to the power grid according to the target power value, so that the power output of the energy storage power station is realized. The loss power value may be considered as the power lost in the power transmission process, where the loss power is associated with the target impedance parameter value, and in this embodiment, the loss power value is calculated based on the target impedance parameter value. In one example, when the loss power value is calculated according to the target impedance parameter value, the loss power value can be calculated by combining the current value of the grid-connected point of the power grid; and the power value and the voltage value of the grid-connected point can also be combined for calculation. When the energy storage power station outputs, the lost power is added on the basis of the scheduling power value (namely the power value required by the power grid), the target power value is obtained, and the target power value is used as the output power of the energy storage power station, so that the power value reaching the power grid after transmission can be ensured to be the scheduling power value. In one example, the power at the point of connection may be considered as the power that the energy storage plant reaches the grid after transmission. In one example, when determining the target power value, it is further required to determine whether the target power value corresponding to the power grid requirement can be met according to the upper limit and the lower limit of charging and discharging of the energy storage power station.

In one embodiment, as shown in fig. 3, the scheduling type includes an active power scheduling type, the impedance parameter value includes a resistance value, and determining the load power value of the energy storage power station according to the target impedance parameter value of the energy storage power station corresponding to the target scheduling type, the power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and the power parameter value of the power grid includes:

step S221, obtaining a resistance value of the energy storage power station under the condition that the target scheduling type is an active power scheduling type, wherein the resistance value is determined according to historical active power parameter data of the energy storage power station and the power grid;

step S222, acquiring an active power parameter value of the energy storage power station and an active power parameter value of the power grid within a preset period;

step S223, determining a load power value of the energy storage power station according to the active power parameter value of the energy storage power station, the active power parameter value of the power grid and the resistance value.

In an embodiment of the present disclosure, the scheduling type includes an active power scheduling type, and the impedance parameter value includes a resistance value. After the target scheduling type is determined, when the target scheduling type is the active power scheduling type, the resistance value of the energy storage power station is obtained, the active power parameter value of the energy storage power station and the active power parameter value of the power grid in a preset period are obtained, and the load power value of the energy storage power station is calculated according to the obtained active power parameter value and the resistance value. In this embodiment, the calculated load power value is an active load power value of the energy storage power station. The resistance value is determined according to historical active power parameter data of the energy storage power station and the power grid, and the active loss, namely the line loss, of the energy storage power station can be calculated according to the resistance value. Under the condition that hardware equipment of the energy storage power station and the power grid is unchanged, the resistance value of the energy storage power station is changed little, so that a fixed resistance value can be calculated to be used as the resistance value of the energy storage power station through historical active power parameter values of the energy storage power station and the power grid. In this embodiment, the power parameter of the power grid may be represented by the power parameter of the grid-connected point.

In one possible implementation manner, the determining the load power value of the energy storage power station according to the active power parameter value of the energy storage power station, the active power parameter value of the power grid and the resistance value includes: and determining a first difference value between the active power value of the energy storage power station and the active power value of the grid connection point of the power grid, and determining a second difference value between the first difference value and the loss power value as a load power value of the energy storage power station, wherein the loss power value is calculated based on the resistance value.

In this embodiment, considering the power consumption of the energy storage power station and the loss in the power transmission process, a relational expression between the powers can be determined, that is, the difference between the active power value output by the energy storage power station and the active power value of the grid-connected point is the active power consumed by the energy storage power station and the active transmission loss power, and the loss power value corresponding to the active transmission loss power can be calculated based on the resistance value; based on the data, the power consumed by the energy storage power station, namely the load power value, can be calculated. It may be appreciated that the power finally calculated in this embodiment is the active power, so the loss power value is the active loss power value, and the load power value is the active load power value.

Further, a loss power value can be calculated through the relation among current, resistance and power, and a grid-connected point current value is determined according to the grid-connected point active power value of the power grid, the grid-connected point reactive power value of the power grid and the grid-connected point voltage value of the power grid; and determining a loss power value according to the grid-connected point current value and the resistance value. The grid-connected point apparent power value can be calculated according to the grid-connected point active power value and the grid-connected point reactive power value of the power grid, and the current value can be calculated according to the grid-connected point apparent power value and the grid-connected point voltage value, so that the active loss power value is determined according to the current value and the resistance value.

According to the embodiment of the disclosure, when the target scheduling is of an active power scheduling type, the energy storage power station needs to output active power to the power grid, the line loss between the energy storage power station and the power grid is considered when the active power is output, the corresponding target impedance parameter value is the resistance value, and the load power value of the energy storage power station is calculated based on the resistance value, so that the determination of the resistance value and the load power value under the active power scheduling is realized, the power loss when the active power is output to the power grid by the energy storage power station can be rapidly and accurately determined, the accuracy and the effectiveness of the target power value are improved, different impedance parameter values and the load power values are determined according to different scheduling types, and the method is suitable for more application scenes.

In one embodiment, the determining the resistance value includes:

In the embodiment of the disclosure, when the resistance value is determined, a relational expression among the active power parameter of the energy storage power station, the active power parameter of the power grid and the resistance of the energy storage power station is constructed according to a circuit principle such as ohm law and the like. And acquiring historical active power parameter data of the energy storage power station and the power grid, and carrying the historical active power parameter data into the relational expression to obtain the resistance value of the energy storage power station. In one example, the relationship may include resistance and other unknowns, and the resistance values within the tolerance range may be obtained by fitting multiple sets of historical active power parameter values. In one example, the historical active power parameter data is determined according to a power parameter in the relation, and the power parameter in the historical active power parameter data corresponds to the power parameter in the relation.

In one possible implementation manner, a relational expression may be constructed according to a relation between power in a transmission process of power transmitted from an energy storage power station to a power grid, where constructing a relational expression between an active power parameter of the energy storage power station, an active power parameter of the power grid, and a resistance of the energy storage power station includes: and constructing a relation according to the association relation among the active power of the energy storage power station, the active power of the grid connection point of the power grid, the loss power and the load power, wherein the difference between the active power of the energy storage power station and the active power of the grid connection point is equal to the sum of the loss power and the load power, and the loss power is obtained based on the active power of the grid connection point of the power grid, the reactive power of the grid connection point of the power grid, the voltage of the grid connection point of the power grid and the resistance of the energy storage power station. The historical active power parameter data comprise a historical active power value of the energy storage power station, a historical grid-connected point active power value of the power grid, a historical grid-connected point reactive power value of the power grid and a historical grid-connected point voltage value of the power grid. In this embodiment, the loss power corresponds to active loss power, and the load power corresponds to active load power.

According to the embodiment of the disclosure, the resistance value of the energy storage power station in the active scene can be quickly and accurately calculated according to the historical active power parameter data and the relational expression between the active power parameter and the resistance, and the accuracy and the reliability of the resistance value are ensured based on the relational expression and the historical data; the resistance value is calculated in advance based on the historical data and the relation, and the load power value can be calculated according to the resistance value, so that the active loss in the transmission process in the active power scheduling scene is determined, and the accuracy of the determined target power value is ensured.

Fig. 4 is a flow chart illustrating a control method of an energy storage power station according to an exemplary embodiment, where the method described in the present embodiment is applied in an active power scheduling type scenario. Specifically, according to the relation among the active power parameter (sum of PCS active power P_pcssum) of the energy storage power station, the active power parameter (grid-connected point active power P_poc), the grid-connected point reactive power Q_poc, the grid-connected point voltage U_poc, the resistor R and the active load power P_load of the energy storage power station, a relation formula is constructed, as shown in a formula (1).

And acquiring historical active power parameter data of the energy storage power station and the power grid, wherein the historical active power parameter data comprise the sum of PCS (process control system) historical active power, power grid historical grid-connected point reactive power and power grid historical grid-connected point voltage. And fitting the resistance and the load power through historical data to obtain a corresponding resistance value in an active power scheduling scene.

If a power scheduling instruction of an active power scheduling type is received at the time t+1, and the corresponding scheduling power value is P_agc (t+1), calculating the load power of the energy storage power station corresponding to the current time according to real-time data (namely data in a preset period). Specifically, data in a preset period (such as time t) is collected, including grid-connected point active power p_poc (t), grid-connected point reactive power q_poc (t), grid-connected point voltage u_poc (t), and sum of PCS active power p_pcssum (t), and by combining R calculated in formula (1), a current real-time load power value p_load (t) of the energy storage power station is calculated in formula (2).

And determining a target power value P_pchard (t+1) according to the real-time load power value P_load (t), the resistance value R and the scheduling power value P_agc (t+1), and calculating the loss power in the transmission process through the scheduling power value, the grid-connected reactive power value, the grid-connected voltage value and the resistance R to obtain the sum of the loss power, the scheduling power value and the real-time load power value, thereby obtaining the target power value P_pchard (t+1) as shown in a formula (3).

In one embodiment, as shown in fig. 5, the scheduling type includes a reactive power scheduling type, the impedance parameter value includes a leakage reactance value, and determining the load power value of the energy storage power station according to the target impedance parameter value of the energy storage power station corresponding to the target scheduling type, the power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and the power parameter value of the power grid includes:

Step S224, obtaining a leakage reactance value of the energy storage power station under the condition that the target dispatching type is a reactive power dispatching type, wherein the leakage reactance value is determined according to historical reactive power parameter data of the energy storage power station and the power grid;

step S225, acquiring a reactive power parameter value of the energy storage power station and a reactive power parameter value of the power grid within a preset period;

and step S226, determining the load power value of the energy storage power station according to the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid and the leakage reactance value.

In an embodiment of the disclosure, the dispatch type includes a reactive power dispatch type and the impedance parameter value includes a leakage reactance value. After the target dispatching type is determined, when the target dispatching type is the reactive power dispatching type, obtaining leakage reactance values of the energy storage power station, obtaining reactive power parameter values of the energy storage power station and reactive power parameter values of a power grid in a preset period, and calculating to obtain load power values of the energy storage power station according to the obtained reactive power parameter values and the leakage reactance values. In this embodiment, the calculated load power value is a reactive load power value of the energy storage power station. The leakage reactance value is determined according to historical reactive power parameter data of the energy storage power station and the power grid, and reactive power loss of the energy storage power station can be calculated according to the leakage reactance value. Under the condition that hardware equipment of the energy storage power station and the power grid is unchanged, the leakage reactance value of the energy storage power station is small in change, and therefore, a fixed leakage reactance value can be calculated through historical reactive power parameter values of the energy storage power station and the power grid to serve as a resistance value of the energy storage power station. In this embodiment, the power parameter of the power grid may be represented by the power parameter of the grid-connected point.

In one possible implementation, the determining the load power value of the energy storage power station according to the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid, and the leakage reactance value includes: and determining a third difference value of the reactive power value of the energy storage power station and the reactive power value of the grid connection point of the power grid, and determining a fourth difference value between the third difference value and a loss power value as a load power value of the energy storage power station, wherein the loss power value is calculated based on the leakage reactance value.

In this embodiment, considering the power consumption of the energy storage power station and the loss in the power transmission process, a relational expression between the powers can be determined, that is, the difference between the reactive power value output by the energy storage power station and the reactive power value of the grid-connected point is the reactive power consumed by the energy storage power station and the reactive transmission loss power, and the loss power value corresponding to the reactive transmission loss power can be calculated based on the leakage reactance value; based on the data, the power consumed by the energy storage power station, namely the load power value, can be calculated. It will be appreciated that the power finally calculated in this embodiment is reactive power, and therefore, the loss power value is a reactive loss power value, and the load power value is a reactive load power value.

Further, a loss power value can be calculated through the relation among current, leakage reactance and power, and a grid-connected point current value is determined according to the grid-connected point active power value of the power grid, the grid-connected point reactive power value of the power grid and the grid-connected point voltage value of the power grid; and determining a loss power value according to the grid-connected point current value and the leakage reactance value. The grid-connected point apparent power value can be calculated according to the grid-connected point active power value and the grid-connected point reactive power value of the power grid, and the current value can be calculated according to the grid-connected point apparent power value and the grid-connected point voltage value, so that the reactive power loss power value is determined according to the current value and the leakage reactance value.

According to the embodiment of the disclosure, when the target dispatching is of a reactive power dispatching type, the energy storage power station needs to output reactive power to the power grid, reactive power loss between the energy storage power station and the power grid is considered when the reactive power is output, the corresponding target impedance parameter value is the leakage reactance value, and the load power value of the energy storage power station is calculated based on the leakage reactance value, so that the determination of the leakage reactance value and the load power value under the reactive power dispatching is realized, the power loss when the reactive power is output to the power grid by the energy storage power station can be rapidly and accurately determined, the accuracy and the effectiveness of the target power value are improved, different impedance parameter values and the load power values are determined according to different dispatching types, and the method is suitable for more application scenes.

In one embodiment, the determining the leakage reactance value includes:

In the embodiment of the disclosure, when the leakage reactance value is determined, according to a circuit principle, such as ohm law, a relational expression among reactive power parameters of the energy storage power station, reactive power parameters of the power grid and leakage reactance of the energy storage power station is constructed. And acquiring historical reactive power parameter data of the energy storage power station and the power grid, and carrying the historical reactive power parameter data into the relational expression to obtain the leakage reactance value of the energy storage power station. In one example, leakage reactance and other unknowns may be included in the relationship, and the leakage reactance values within the error tolerance range may be obtained by fitting multiple sets of historical reactive power parameter values. In one example, the historical reactive power parameter data is determined from a power parameter in a relationship, the power parameter in the historical reactive power parameter data corresponding to the power parameter in the relationship.

In one possible implementation manner, a relation may be constructed according to a relation between power in a transmission process of power transmitted from an energy storage power station to a power grid, where constructing a relation between a reactive power parameter of the energy storage power station, a reactive power parameter of the power grid, and leakage reactance of the energy storage power station includes: and constructing a relational expression according to the association relation among the reactive power of the energy storage power station, the grid-connected point reactive power of the power grid, the loss power and the load power, wherein the difference between the reactive power of the energy storage power station and the grid-connected point reactive power is equal to the sum of the loss power and the load power, and the loss power is obtained based on the grid-connected point active power of the power grid, the grid-connected point reactive power of the power grid, the grid-connected point voltage of the power grid and the leakage reactance of the energy storage power station. The historical reactive power parameter data comprise a historical reactive power value of the energy storage power station, a historical grid-connected point active power value of the power grid, a historical grid-connected point reactive power value of the power grid and a historical grid-connected point voltage value of the power grid. In this embodiment, the loss power corresponds to reactive loss power, and the load power corresponds to reactive load power.

According to the embodiment of the disclosure, the leakage reactance value of the energy storage power station in the reactive scene can be rapidly and accurately calculated according to the historical reactive power parameter data and the relational expression between the reactive power parameter and the leakage reactance, and the accuracy and the reliability of the leakage reactance value are ensured based on the relational expression and the historical data; the leakage reactance value is calculated in advance based on historical data and a relational expression, and the load power value can be calculated according to the leakage reactance value, so that the reactive power loss in the transmission process in a reactive power scheduling scene is determined, and the accuracy of the determined target power value is ensured.

Fig. 6 is a flow chart illustrating a control method of an energy storage power station according to an exemplary embodiment, where the method described in the present embodiment is applied in a reactive power scheduling type scenario. Specifically, according to the relation among the reactive power parameter (sum of PCS reactive power Q_pcssum) of the energy storage power station, the reactive power parameter (grid-connected point reactive power Q_poc), the grid-connected point active power P_poc, the grid-connected point voltage U_poc, leakage reactance X and the reactive load power Q_load of the energy storage power station, the relation is constructed, as shown in a formula (4).

And acquiring historical reactive power parameter data of the energy storage power station and the power grid, wherein the historical reactive power parameter data comprise the sum of PCS (process control system) historical reactive power, power grid historical grid-connected point active power, power grid historical grid-connected point reactive power and power grid historical grid-connected point voltage. And fitting the leakage reactance and the load power through historical data to obtain a corresponding leakage reactance value in a reactive power scheduling scene.

If a power scheduling instruction of a reactive power scheduling type is received at the time t+1, and the corresponding scheduling power value is Q_avc (t+1), calculating the reactive load power of the energy storage power station corresponding to the current time according to real-time data (namely data in a preset period). Specifically, data in a preset period (such as time t) is collected, including grid-connected point active power p_poc (t), grid-connected point reactive power q_poc (t), grid-connected point voltage u_poc (t), and sum of PCS reactive power q_pcssum (t), and the current real-time reactive load power value q_load (t) of the energy storage power station is obtained through calculation according to formula (5) in combination with X calculated according to formula (4).

And determining a target power value Q_pchard (t+1) according to the real-time reactive load power value Q_load (t), the leakage reactance value X and the scheduling power value Q_avc (t+1), and calculating the loss power in the transmission process through the scheduling power value, the grid-connected point active power value, the grid-connected point voltage value and the leakage reactance X to obtain the sum of the loss power, the scheduling power value and the real-time reactive load power value to obtain the target power value Q_pchard (t+1) as shown in a formula (6).

In the embodiment of the disclosure, when historical power parameter data is acquired, the power utilization period of the energy storage power station is determined according to the operation parameters of the energy storage power station. The operation parameters of the energy storage power station may include, but are not limited to, working time, operation power and the like of each device in the energy storage power station, according to the operation parameters of the energy storage power station, the electricity consumption period of the energy storage power station may be determined, the electricity consumption condition of the energy storage power station may be periodically changed, the changing condition of each electricity consumption period is similar, for example, the load power of the energy storage power station may be periodically and normally changed in a distributed manner, and the load power in each electricity consumption period is normally changed in a distributed manner. And acquiring historical power parameter data corresponding to a plurality of power consumption periods from the power parameter data in the preset historical period, wherein the operation conditions of the energy storage power station in each power consumption period are similar, so that corresponding impedance parameter values can be obtained through fitting the historical power parameter data of the plurality of power consumption periods, and the accuracy of the obtained impedance parameter values is further effectively improved.

According to the embodiment of the disclosure, when the historical power parameter data is obtained to calculate the impedance parameter value, the power consumption period is determined according to the operation parameters of the energy storage power station, and the historical power parameter data corresponding to a plurality of power consumption periods are obtained from the power parameter data in the preset historical period, so that the obtained historical power parameter data comprises the historical power parameter data corresponding to the plurality of power consumption periods.

According to the scheme, the load power and the loss power in the station can be accurately calculated, so that the target power value output by the energy storage power station can be accurately controlled according to the scheduling instruction, one-time adjustment is achieved, the response time of the energy storage power station is effectively reduced, the adjustment and output efficiency of the energy storage power station is improved, and the method is suitable for more application scenes.

It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.

Based on the same inventive concept, the embodiment of the application also provides a control system of the energy storage power station for realizing the control method of the energy storage power station. The implementation of the solution provided by the system is similar to the implementation described in the above method, so the specific limitation in the embodiments of the control system of one or more energy storage power stations provided below may be referred to the limitation of the control method of the energy storage power station hereinabove, and will not be repeated here.

In an exemplary embodiment, as shown in fig. 7, a control system 700 of an energy storage power station is provided, the energy storage power station being electrically connected to a power grid, the control system comprising:

a response module 710, configured to determine a target scheduling type and a scheduling power value corresponding to a power scheduling instruction in response to receiving the power scheduling instruction of the power grid;

a determining module 720, configured to determine a load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and a power parameter value of the power grid, where the target impedance parameter value is determined according to historical power parameter data of the energy storage power station and the power grid matched with the target scheduling type;

and the control module 730 is configured to determine a target power value according to the load power value, the loss power value, and the scheduling power value, and control the energy storage power station to output power to the power grid according to the target power value, where the loss power value is calculated based on the target impedance parameter value.

In one embodiment, the first determining sub-module includes:

The first building unit includes:

In one embodiment, the second determining sub-module includes:

the second building unit includes:

The various modules in the control system of the energy storage power station can be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.

In one exemplary embodiment, a computer device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 8. The computer device includes a processor, a memory, an Input/Output interface (I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer device is used for storing data involved in the method described in this embodiment, such as power parameter data. The input/output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method of controlling an energy storage power station.

It will be appreciated by those skilled in the art that the structure shown in fig. 8 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.

In an embodiment, there is also provided a computer device comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the method embodiments described above when the computer program is executed.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.

In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.

It should be noted that, the user information (including, but not limited to, user equipment information, user personal information, etc.) and the data (including, but not limited to, data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party, and the collection, use, and processing of the related data are required to meet the related regulations.

Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims

1. A method for controlling an energy storage power station, the method being applied to a control system of the energy storage power station, the energy storage power station being electrically connected to a power grid, the method comprising:

2. The method of claim 1, wherein the scheduling type includes an active power scheduling type, the impedance parameter value includes a resistance value, and determining the load power value of the energy storage power station according to a target impedance parameter value of the energy storage power station corresponding to the target scheduling type, a power parameter value of the energy storage power station matched to the target scheduling type in a preset period, and a power parameter value of the power grid includes:

3. The method of claim 2, wherein the determining the load power value of the energy storage power station based on the active power parameter value of the energy storage power station, the active power parameter value of the power grid, and the resistance value comprises:

4. A method according to claim 3, characterized in that the manner of determining the loss power value comprises:

5. The method according to claim 2, wherein the determining of the resistance value comprises:

6. The method of claim 5, wherein the historical active power parameter data comprises a historical active power value of the energy storage power station, a historical grid-connected active power value of the power grid, a historical grid-connected reactive power value of the power grid, a historical grid-connected voltage value of the power grid;

7. The method of claim 1, wherein the scheduling type comprises a reactive power scheduling type, the impedance parameter value comprises a leakage reactance value, and the determining the load power value of the energy storage power station according to the target impedance parameter value of the energy storage power station corresponding to the target scheduling type, the power parameter value of the energy storage power station matched with the target scheduling type in a preset period, and the power parameter value of the power grid comprises:

8. The method of claim 7, wherein the determining the load power value of the energy storage power station from the reactive power parameter value of the energy storage power station, the reactive power parameter value of the power grid, and the leakage reactance value comprises:

9. The method of claim 8, wherein the determining the loss power value comprises:

10. The method of claim 7, wherein the determining the leakage reactance value comprises:

11. The method of claim 10, wherein the historical reactive power parameter data comprises a historical reactive power value of the energy storage power station, a historical grid-connected active power value of the power grid, a historical grid-connected reactive power value of the power grid, a historical grid-connected voltage value of the power grid;

12. The method of claim 1, wherein the historical power parameter data is obtained by a method comprising:

13. A control system for an energy storage power station, wherein the energy storage power station is electrically connected to a power grid, the control system comprising:

14. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 12 when the computer program is executed.

15. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 12.

16. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any one of claims 1 to 12.