Cooperative operation method for pumped storage power station and same-basin hydropower station and related device

Abstract

The invention discloses a pumped storage power station and same-basin hydropower station cooperative operation method and a related device, and relates to the technical field of pumped storage power station and hydropower station cooperative operation, the method comprises the following steps: establishing an operation model of pumped storage power station and same-basin hydropower station cooperative operation, the operation model comprising an objective function and constraint conditions, the target function takes a deviation value between minimizing the power generation amount of cooperative operation of the pumped storage power station and the same-basin hydropower station and a power grid load as an optimization target; the constraint conditions comprise a water balance and water level storage capacity constraint, a pumped storage power station pumping and power generation constraint, a pumped storage power station and same-basin hydropower station output constraint, a unit startup and shutdown duration and maximum startup and shutdown frequency constraint and a unit power generation water head constraint; and solving the operation model to obtain an operation scheme of the pumped storage power station when the pumped storage power station and the same-basin hydropower station cooperatively operate. The method can provide reference for actual cooperative operation of the pumped storage power station and the same-basin hydropower station.

Description

Technical Field

[0001] The present application relates to the technical field of coordinated operation of pumped-storage power stations and hydropower stations, and in particular to a method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin and related devices. Background Art

[0002] The increasing demand for safe and stable operation of the power grid has put forward higher requirements on the grid's peak-shaving capacity, energy storage capacity and flexible operation and regulation capabilities. It is necessary to develop energy storage facilities as a regulating power source to ensure the safe operation of the power grid and improve the quality of electricity.

[0003] As a recognized large-scale, economical, efficient and green energy storage power source, the pumped storage power station is the most stable, mature, safe and economical energy storage form at this stage. The pumped storage power station has multiple functions such as peak-to-valley shifting, energy storage, frequency regulation, phase regulation, emergency standby and black start. The configuration of necessary pumped storage power stations can ensure the safe, stable and economic operation of the power grid and improve the power supply quality of the power grid. The operation of pumped storage power stations in conjunction with new energy sources such as solar energy and wind power can significantly improve the utilization rate of new energy, promote the efficient utilization of clean energy resources and energy conservation and emission reduction, and the economic and social benefits are very significant. The pumped storage power station is an inevitable product of the development of modern smart grids and an indispensable part of the power grid. It plays an important role in efficiently ensuring the safe and economic operation of the power grid and providing flexible adjustment capabilities to meet the diversified needs of the power grid. The pumped storage power station is an important green, low-carbon, clean and flexible adjustment power source for the power system. Accelerating the development of pumped storage power stations is an urgent requirement for building a new power system with new energy as the main body. It is of great significance to ensure power supply, ensure power grid safety, promote new energy consumption, and promote green and low-carbon transformation of energy.

[0004] Current research focuses more on the structure of the pumped-storage power station itself, and less on the mechanism of coordinated operation between it and hydropower stations in the same river basin and the impacts it can produce. It is unable to provide a reference for the actual coordinated operation of the pumped-storage power station and hydropower stations in the same river basin. Summary of the invention

[0005] The purpose of this application is to provide a method and related devices for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin, which can determine the operation plan of the pumped-storage power station under the premise of considering the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin, and provide a reference for the actual coordinated operation of the pumped-storage power station and the hydropower station in the same river basin.

[0006] To achieve the above objectives, this application provides the following solutions:

[0007] In a first aspect, the present application provides a method for coordinated operation of a pumped storage power station and a hydropower station in the same basin, wherein the lower reservoir of the pumped storage power station is a reservoir of each hydropower station in the same basin as the pumped storage power station, and the method for coordinated operation of the pumped storage power station and the hydropower station in the same basin comprises:

[0008] Establish an operation model for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as an optimization target, the deviation value is the deviation value between the coordinated operation power generation of the pumped-storage power station and the hydropower station in the same river basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same river basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints, and unit generating head constraints;

[0009] The operation model is solved to obtain an operation plan of the pumped-storage power station when the pumped-storage power station operates in coordination with a hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped-storage power station in each unit time period in the scheduling cycle, and the operation mode includes a power generation mode and a pumping mode.

[0010] In a second aspect, the present application provides a device for coordinated operation of a pumped storage power station and a hydropower station in the same basin, wherein the device for coordinated operation of a pumped storage power station and a hydropower station in the same basin comprises:

[0011] An operation model establishment module is used to establish an operation model for the coordinated operation of a pumped-storage power station and a hydropower station in the same basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as an optimization target, the deviation value is the deviation value between the coordinated operation power generation of the pumped-storage power station and the hydropower station in the same basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints, and unit generating head constraints;

[0012] The operation model solving module is used to solve the operation model to obtain the operation plan of the pumped storage power station when the pumped storage power station operates in coordination with the hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped storage power station in each unit time period in the scheduling cycle, and the operation mode includes the power generation mode and the pumping mode.

[0013] In a third aspect, the present application provides a computer device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-mentioned method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin.

[0014] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin.

[0015] In a fifth aspect, the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above-mentioned method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin.

[0016] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0017] The present application provides a method and related devices for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin, and establishes an operation model for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin. The operation model includes an objective function and constraints. The objective function is to minimize the deviation between the power generation of the pumped-storage power station and the hydropower station in the same river basin and the load on the power grid as the optimization target. The constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same river basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints, and unit power generation head constraints; the operation model is solved to obtain an operation plan of the pumped-storage power station when the pumped-storage power station and the hydropower station in the same river basin are operated in coordination. The operation plan includes the operation mode and power generation of the pumped-storage power station in each unit time period in the scheduling cycle, and the operation mode includes a power generation mode and a pumping mode. By establishing and solving the operation model, the present application can determine the operation plan of the pumped-storage power station under the premise of considering the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin, and provide a reference for the actual coordinated operation of the pumped-storage power station and the hydropower station in the same river basin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is an application environment diagram of a method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in Example 1 of the present application.

[0020] Figure 2 A flow chart of a method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in Example 1 of the present application.

[0021] Figure 3 A detailed flow chart of a method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in Example 1 of the present application.

[0022] Figure 4 A schematic diagram of the functional modules of a device for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in Example 2 of the present application.

[0023] Figure 5 A schematic diagram of the structure of a computer device provided in Example 3 of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] Example 1

[0026] The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal communicates with the server through the network. The data storage system can store the data that the server needs to process. The data storage system can be set up separately, integrated on the server, or placed on the cloud or other servers. The terminal can send the pending computing request (used to request the operation plan of the pumped storage power station within the scheduling period) to the server. After the server receives the pending computing request, for the pending computing request, the server establishes an operation model for the coordinated operation of the pumped storage power station and the hydropower station in the same basin. The operation model includes an objective function and constraints. The objective function minimizes the deviation value as the optimization target. The constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped storage power station, output constraints of the pumped storage power station and the hydropower station in the same basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints and unit power generation head constraints; solve the operation model to obtain the operation plan of the pumped storage power station when the pumped storage power station and the hydropower station in the same basin are operated in coordination. The operation plan includes the operation mode and power generation of the pumped storage power station in each unit time period in the scheduling period. The server can feedback the obtained operation plan for the calculation request to the terminal.

[0027] In addition, in some embodiments, the method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin can also be implemented independently by a server or a terminal. For example, the terminal can directly process the computing requests to be processed, or the server can obtain the computing requests to be processed from the data storage system and process the computing requests to be processed.

[0028] The terminal may be, but is not limited to, various desktop computers, laptops, smart phones, tablet computers, IoT devices, and portable wearable devices. The server may be implemented as an independent server or a server cluster consisting of multiple servers, or may be a cloud server.

[0029] like Figure 2As shown, a method for coordinated operation of a pumped storage power station and a hydropower station in the same basin is provided. The method is executed by a computer device, and can be executed by a computer device such as a terminal or a server alone, or can be executed by a terminal and a server together. In the embodiment of the present application, the method is applied to Figure 1 The server in the example is used to illustrate the following steps:

[0030] Step S1, establishing an operation model for the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as an optimization target, the deviation value is the deviation value between the power generation of the pumped-storage power station and the hydropower station in the same river basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same river basin, unit start-up and shutdown duration and maximum start-up and shutdown number constraints, and unit generating head constraints.

[0031] Step S2, solving the operation model to obtain an operation plan of the pumped-storage power station when the pumped-storage power station operates in coordination with a hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped-storage power station in each unit time period in the scheduling cycle, and the operation mode includes a power generation mode and a pumping mode.

[0032] By implementing the above-mentioned steps S1 to S2, this embodiment establishes an operation model and solves the operation model, and can determine the operation plan of the pumped-storage power station under the premise of considering the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin, thereby providing a reference for the actual coordinated operation of the pumped-storage power station and the hydropower station in the same river basin.

[0033] In this embodiment, the pumped storage power station may also be referred to as a pumped storage power station, which is a power station that pumps water from a lower reservoir to an upper reservoir for energy storage and releases water from an upper reservoir to a lower reservoir for power generation. The lower reservoir of the pumped storage power station is the reservoir of each hydropower station in the same basin as the pumped storage power station, that is, the pumped storage power station pumps water from the reservoir of the hydropower station, and the water in the reservoir of each hydropower station is provided by the upper reservoir of the pumped storage power station. The water in the reservoirs of each hydropower station does not flow between each other. This embodiment does not impose any limitation on the number of hydropower stations and the number of reservoirs of the hydropower stations.

[0034] In order to analyze the dynamic response characteristics of the coordinated operation of pumped-storage power stations and hydropower stations in the same river basin in the cross-temporal and spatial scale scheduling process, this embodiment proposes an operation model for the coordinated operation of pumped-storage power stations and hydropower stations in the same river basin, which is a dynamic response simulation model, and uses a particle swarm optimization algorithm to solve the operation model, so as to calculate and analyze the hourly pumping and releasing scheme of the pumped-storage power station from the reservoir of the hydropower station in the same river basin according to the daily load data in the typical month issued by the power grid, so as to meet the load demand, quantitatively analyze the dispatching method of the pumped-storage power station under the daily load conditions of different typical months, achieve the balance of pumping and power generation in typical months, and provide a certain reference for the actual coordinated operation of the pumped-storage power station and the hydropower station in the same river basin.

[0035] This embodiment first determines the objective function of the coordinated operation of the pumped storage power station and the hydropower station in the same basin under the condition of cross-temporal and spatial scales. The objective function is to minimize the deviation between the power generation of the pumped storage power station and the hydropower station in the same basin and the grid load. The objective function is:

[0036]

[0037] In formula (1), F is the objective function value; min(·) realizes flexible scheduling of coordinated operation of pumped storage power station and hydropower station in the same basin by minimizing the deviation between the power generation of coordinated operation of pumped storage power station and hydropower station in the same basin and the grid load; T is the total number of unit time periods in the scheduling cycle. In this embodiment, the scheduling cycle can be set to one day, the unit time period is one hour, and one day includes 24 hours, so T is 24; Z t G is the power generation of the pumped storage power station in the tth unit time period, that is, the hourly power generation of the pumped storage power station on that day (kW·h); t is the total power generation of all hydropower stations in the tth unit time period, that is, the hourly power generation of the hydropower station on that day (kW·h); S t is the load of the power grid in the tth unit time period, that is, the hourly load of the power grid on that day (kW·h), which is determined by the daily load data issued by the power grid.

[0038] The power generation of the pumped storage power station in the i-th unit time period is equal to the product of the power generation of the pumped storage power station in the i-th unit time period and the length of the unit time period.

[0039] This embodiment analyzes the operating characteristics of the pumped-storage power station, specifically the operating characteristics of the pumped-storage power station in the power generation mode and the pumping mode, as follows.

[0040] When the pumped storage power station is in pumping mode, the calculation formula for the power generation of the pumped storage power station is:

[0041]

[0042] In formula (2), P gis the power generation of the pumped storage power station in pumping mode; ρ is the density of the working fluid (usually water) (kg / m 3 ); g is the ground gravity acceleration (m / s 2 ); Q is the volume flow rate of the working fluid (m 3 / s); H is the standard height of the upper reservoir of the pumped storage power station (m); h f is the head loss; η g is the efficiency of the water pump in the pumped storage power station.

[0043] When the pumped storage power station is in power generation mode, the calculation formula for the power generation power of the pumped storage power station is:

[0044]

[0045] In formula (3), P p is the power generation power of the pumped storage power station in power generation mode; η p is the efficiency of the turbine in the pumped storage power station.

[0046] This embodiment further determines the constraints for the coordinated operation of the pumped-storage power station and the hydropower station in the same basin under cross-temporal and spatial scale conditions. The constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same basin, unit start-up and shutdown duration and maximum start-up and shutdown number constraints, and unit generating head constraints.

[0047] The water balance and water level storage capacity constraints are:

[0048] V j,t+1 =V j,t +(I j,t -q j,t )Δt(4)

[0049] I j,t =αq k,t (5)

[0050] H i,min ≤H i ≤H i,max (6)

[0051] H i -H i,end ≤ΔH(7)

[0052] V i,min ≤V i ≤V i,max (8)

[0053] In the above formula, V j,t+1 V is the storage capacity of the reservoir of the j-th hydropower station at the t+1-th unit time period, that is, the storage capacity of the reservoir of the j-th hydropower station at the end of the t-th unit time period; j,tis the storage capacity of the reservoir of the j-th hydropower station in the t-th unit time period; I j,t is the inflow of the reservoir of the jth hydropower station in the tth unit time period; q j,t is the outflow of the reservoir of the jth hydropower station in the tth unit time period; Δt is the length of the unit time period; α is the loss coefficient, specifically the loss coefficient of pumping water from the downstream power station to the upstream power station, generally taken as 0.88~0.91; q k,t H is the outflow of pumped storage power station k in the tth unit time period; i,min is the lower limit of the water level of the reservoir of the i-th power station. The power station includes the pumped storage power station and each hydropower station in the same basin as the pumped storage power station. The reservoir of the pumped storage power station refers to the upper reservoir of the pumped storage power station; H i is the water level of the reservoir of the i-th power station; H i,max is the upper limit of the water level of the reservoir of the i-th power station; H i,end is the controlled water level of the reservoir of the i-th power station at the end of the dispatching cycle; ΔH is the water level deviation allowed within the dispatching cycle to prevent affecting the next dispatching cycle; V i,min is the lower limit of the reservoir capacity of the i-th power station; V i is the storage capacity of the reservoir of the i-th power station; V i,max is the upper limit of the reservoir capacity of the i-th power station.

[0054] The operation modes of the pumped storage power station include pumping mode and power generation mode. According to the difference between the pumping mode and the power generation mode, the working state of the pumped storage power station is set. Given the pumping and power generation modes of the pumped storage power station, in order to ensure the stable output of the pumped storage power station, it is limited that the same mode can only be switched to another mode after a certain period of time. The pumped storage power station cannot switch between the pumping mode and the power generation mode at will. The pumping and power generation constraints of the pumped storage power station are:

[0055]

[0056] In formula (9), is a binary variable that represents whether the pumped storage power station is in pumping mode in the tth unit time period. The value is equal to 0 or 1. If it is in pumping mode, otherwise, is a binary variable that represents whether the pumped storage power station is in power generation mode in the tth unit time period. The value is equal to 0 or 1. If it is in power generation mode, otherwise,

[0057] The output constraints of pumped storage power stations and hydropower stations in the same basin are:

[0058] P i,t =η·Q i,t ·hi,t (10)

[0059] In formula (10), P i,t is the power generation of the ith power station in the tth unit time period; η is the output coefficient of the ith power station in the tth unit time period; Q i,t h is the volume flow rate of the working fluid (generally water) used by the i-th power station to generate electricity in the t-th unit time period; i,t is the average net water head of the ith power station in the tth unit time period.

[0060] The unit start-up and shutdown duration and maximum start-up and shutdown times are constrained as follows:

[0061]

[0062] In the above formula, x i,n,t is the startup operation variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is started in the t-th unit time period, then x i,n,t =1, otherwise, x i,n,t =0;y i,n,t is the shutdown operation variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is shut down in the t-th unit time period, then y i,n,t =1, otherwise, y i,n,t =0;γ i,n,t is the operating state variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is in the start-up operation state in the t-th unit time period, then γ i,n,t =1, otherwise, γ i,n,t =0;γ i,n,t-1 is the operating state variable of the nth unit in the i-th power station in the t-1th unit time period. If the nth unit in the i-th power station is in the start-up operation state in the t-1th unit time period, then γ i,n,t-1 =1, otherwise, γ i,n,t-1 =0; δ is the technical subscript; is the minimum startup duration of the nth unit in the i-th power station; is the minimum downtime duration of the nth unit in the ith power station; T is the total number of unit time periods in the scheduling cycle; is the upper limit of the number of startup times of the nth unit in the ith power station within the scheduling cycle.

[0063] The unit generating head constraint is:

[0064]

[0065] In formula (13), hi,n,t is the net water head of the nth unit in the i-th power station in the t-th unit time period; Z i,t-1 is the dead water level of the ith power station at the end of the t-1th unit time period; Z i,t is the dead water level of the ith power station at the end of the tth unit time period; is the tailwater level of the ith power station at the end of the tth unit time period; is the head loss value of the nth unit in the i-th power station in the t-th unit time period.

[0066] Based on this, this embodiment establishes an operation model for the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin. The operation model includes the above-mentioned objective function and constraints. This embodiment further obtains various basic information of the pumped-storage power station and the hydropower station in the same river basin, daily load data issued by the power grid in typical months, and parameters such as the daily water flow of the hydropower station and the reservoir water level. Among them, the basic information of the pumped storage power station and the hydropower station in the same basin includes the normal water level, dead water level, flood limit water level, regulating storage capacity, installed capacity, and rated head of the reservoir of the power station. The normal water level refers to the highest water level stored in the reservoir under normal operation. The dead water level is the lowest water level allowed for the reservoir to fall under normal operation. The flood limit water level is the highest water level allowed for the reservoir to store water for benefit during the flood season. The regulating storage capacity is the reservoir volume between the normal water level and the dead water level. The installed capacity is the sum of the rated output of all units in the power station. The rated head is the minimum head required for the units in the power station to generate the rated output under normal conditions. Based on the basic information, the upper and lower limits in the operation model can be designed. For example, the lower limit of the water level is determined based on the dead water level, and the upper limit of the water level is determined based on the normal water level or the flood limit water level. The daily load data issued by the power grid in a typical month is used to determine the hourly load of the power grid.

[0067] In this embodiment, the particle swarm optimization algorithm can be used to solve the above operation model. Then, in S2, the operation model is solved to obtain the operation plan of the pumped storage power station when the pumped storage power station and the hydropower station in the same basin are operated in coordination. Specifically, the operation model is solved by the particle swarm optimization algorithm to obtain the operation plan of the pumped storage power station when the pumped storage power station and the hydropower station in the same basin are operated in coordination, that is, to solve Z in the objective function. t , when Z t If it is positive, it means it is in power generation mode. t If it is negative, it means it is in pumping mode. The operation plan includes the operation mode and power generation of the pumped-storage power station in each unit time period in the scheduling cycle. The operation mode includes power generation mode and pumping mode. That is, the dispatching method of the pumped-storage power station under the daily load conditions in different typical months is quantitatively analyzed, and the hourly pumping and power generation plans of the pumped-storage power station are output to achieve pumping and power generation balance and meet the daily load data requirements issued by the power grid.

[0068] This embodiment provides a method for coordinated operation of a pumped storage power station and a hydropower station in the same river basin, which is used in the technical field of coordinated operation of a pumped storage power station and a hydropower station in the same river basin. Figure 3 As shown, it includes obtaining basic information such as normal water level, dead water level, flood limit water level, regulating reservoir capacity, installed capacity, rated head, etc. of the pumped-storage power station and the hydropower station in the same basin; obtaining daily load data issued by the power grid in typical months; obtaining parameters such as water flow and reservoir water level of the hydropower station on that day; clarifying the independent operation characteristics of the pumped-storage power station and the hydropower station and the coordinated operation characteristics of the pumped-storage power station and the hydropower station in the same basin; setting the working state of the pumped-storage power station; determining the objective function of the coordinated operation of the pumped-storage power station and the hydropower station in the same basin; determining the constraints for the coordinated operation of the pumped-storage power station and the hydropower station in the same basin; solving with the particle swarm optimization algorithm, outputting the hourly pumping and releasing scheme of the pumped-storage power station from the reservoir of the hydropower station in the same basin, achieving the balance of pumping and power generation in typical months and meeting the load demand. Compared with the traditional research on pumped-storage power stations, the purpose of this embodiment is to calculate and analyze the hourly pumping and releasing scheme of the pumped-storage power station from the reservoir of the hydropower station in the same basin according to the daily load data in the typical month issued by the power grid to meet the load demand. Specifically, an operation model of the coordinated operation of the pumped-storage power station and the hydropower station in the same basin at different time and space scales is proposed, and the particle swarm optimization algorithm is used to solve and quantitatively analyze the dispatching method of the pumped-storage power station under the daily load conditions in different typical months, so as to achieve the balance of pumping and power generation in typical months, and provide a certain reference for the actual coordinated operation of the pumped-storage power station and the hydropower station in the same basin.

[0069] The embodiment of the present application also provides an application scenario, which applies the above-mentioned method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin. Specifically, the method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in this embodiment can be applied in the operation control scenario of a pumped-storage power station. The operation control scenario of a pumped-storage power station includes an operation plan generation link and an operation control link. The operation plan generation link is used to establish and solve the operation model to obtain the operation plan of the pumped-storage power station, and the operation control link is used to control the pumped-storage power station to operate according to the operation plan. The method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin provided in this embodiment belongs to the operation plan generation link.

[0070] Example 2

[0071] Based on the same inventive concept, the embodiment of the present application also provides a pumped storage power station and the same basin hydropower station coordinated operation device for realizing the above-mentioned pumped storage power station and the same basin hydropower station coordinated operation method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in the embodiment of the pumped storage power station and the same basin hydropower station coordinated operation device provided below can refer to the above-mentioned limitations on the pumped storage power station and the same basin hydropower station coordinated operation method, which will not be repeated here.

[0072] like Figure 4As shown, a device for coordinated operation of a pumped storage power station and a hydropower station in the same river basin is provided, and the device for coordinated operation of a pumped storage power station and a hydropower station in the same river basin comprises:

[0073] The operation model establishment module M1 is used to establish an operation model for the coordinated operation of the pumped-storage power station and the hydropower station in the same basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as the optimization target, the deviation value is the deviation value between the power generation of the pumped-storage power station and the hydropower station in the same basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same basin, unit start-up and shutdown duration and maximum start-up and shutdown number constraints, and unit generating head constraints.

[0074] The operation model solving module M2 is used to solve the operation model to obtain the operation plan of the pumped storage power station when the pumped storage power station operates in coordination with the hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped storage power station in each unit time period in the scheduling cycle, and the operation mode includes the power generation mode and the pumping mode.

[0075] Example 3

[0076] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as 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. The processor of the computer device is used 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, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for coordinated operation of a pumped storage power station and a hydropower station in the same basin is implemented.

[0077] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0078] In an exemplary embodiment, a computer device is also provided, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for coordinated operation of the pumped storage power station and the hydropower station in the same basin as described in Example 1.

[0079] Example 4

[0080] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin described in Example 1 is implemented.

[0081] Example 5

[0082] An embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the method for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin as described in Example 1.

[0083] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for coordinated operation of a pumped storage power station and a hydropower station in the same basin, wherein the lower reservoir of the pumped storage power station is a reservoir of each hydropower station in the same basin as the pumped storage power station, characterized in that: The method for coordinated operation of the pumped storage power station and the hydropower station in the same river basin comprises: Establish an operation model for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as an optimization target, the deviation value is the deviation value between the coordinated operation power generation of the pumped-storage power station and the hydropower station in the same river basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same river basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints, and unit generating head constraints; The operation model is solved to obtain an operation plan of the pumped-storage power station when the pumped-storage power station operates in coordination with a hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped-storage power station in each unit time period in the scheduling cycle, and the operation mode includes a power generation mode and a pumping mode.

2. The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin according to claim 1 is characterized in that: The objective function is: Among them, F is the objective function value; T is the total number of unit time periods in the scheduling cycle; Z t is the power generation of the pumped storage power station in the tth unit time period; G t is the total power generation of all hydropower stations in the tth unit time period; S t is the load of the power grid in the tth unit time period.

3. The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin according to claim 1, characterized in that: The water balance and water level storage capacity constraints are: V j,t+1 =V j,t +(I j,t -q j,t )Δt; I j,t =αq k,t ; H i,min ≤H i ≤H i,max ; |H i -H i,end |≤ΔH; In i,min ≤V i ≤V i,max ; Among them, V j,t+1 V is the storage capacity of the reservoir of the jth hydropower station in the t+1th unit time period; j,t is the storage capacity of the reservoir of the j-th hydropower station in the t-th unit time period; I j,t is the inflow of the reservoir of the jth hydropower station in the tth unit time period; q j,t is the outflow of the reservoir of the jth hydropower station in the tth unit time period; Δt is the length of the unit time period; α is the loss coefficient; q k,t H is the outflow of pumped storage power station k in the tth unit time period; i,min is the lower limit of the water level of the reservoir of the i-th power station. The power station includes the pumped storage power station and each hydropower station in the same basin as the pumped storage power station. The reservoir of the pumped storage power station refers to the upper reservoir of the pumped storage power station; H i is the water level of the reservoir of the i-th power station; H i,max is the upper limit of the water level of the reservoir of the i-th power station; H i,end is the controlled water level of the reservoir of the i-th power station at the end of the dispatching period; ΔH is the allowable water level deviation within the dispatching period; V i,min is the lower limit of the reservoir capacity of the i-th power station; V i is the storage capacity of the reservoir of the i-th power station; V i,max is the upper limit of the reservoir capacity of the i-th power station; The pumping and power generation constraints of the pumped storage power station are: in, is a binary variable that represents whether the pumped storage power station is in pumping mode in the tth unit time period. If it is in pumping mode, then otherwise, is a binary variable that represents whether the pumped storage power station is in power generation mode in the tth unit time period. If it is in power generation mode, then otherwise, The output constraints of the pumped storage power station and the hydropower station in the same basin are: P i,t =η·Q i,t ·h i,t ; Among them, P i,t is the power generation of the ith power station in the tth unit time period; η is the output coefficient; Q i,t h is the volume flow rate of the working fluid used by the i-th power station in the t-th unit time period; i,t is the average net water head of the ith power station in the tth unit time period; The unit start-up and shutdown duration and maximum start-up and shutdown times are constrained as follows: Among them, x i,n,t is the startup operation variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is started in the t-th unit time period, then x i,n,t =1, otherwise, x i,n,t =0;y i,n,t is the shutdown operation variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is shut down in the t-th unit time period, then y i,n,t =1, otherwise, y i,n,t =0;γ i,n,t is the operating state variable of the nth unit in the i-th power station in the t-th unit time period. If the nth unit in the i-th power station is in the startup state in the t-th unit time period, then γ i,n,t =1, otherwise, γ i,n,t =0;γ i,n,t-1 is the operating state variable of the nth unit in the i-th power station in the t-1th unit time period. If the nth unit in the i-th power station is in the start-up operation state in the t-1th unit time period, then γ i,n,t-1 =1, otherwise, γ i,n,t-1 =0; δ is the technical subscript; is the minimum startup duration of the nth unit in the i-th power station; is the minimum downtime duration of the nth unit in the ith power station; T is the total number of unit time periods in the scheduling cycle; is the upper limit of the number of startup times of the nth unit in the i-th power station within the scheduling cycle; The unit generating head constraint is: Among them, h i,n,t is the net water head of the nth unit in the i-th power station in the t-th unit time period; Z i,t-1 is the dead water level of the ith power station in the t-1th unit time period; Z i,t is the dead water level of the ith power station in the tth unit time period; is the tailwater level of the ith power station in the tth unit time period; is the head loss value of the nth unit in the i-th power station in the t-th unit time period.

4. The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin according to claim 1, characterized in that: The operation model is solved to obtain an operation plan of the pumped-storage power station when the pumped-storage power station operates in coordination with a hydropower station in the same river basin, specifically comprising: using a particle swarm optimization algorithm to solve the operation model to obtain an operation plan of the pumped-storage power station when the pumped-storage power station operates in coordination with a hydropower station in the same river basin.

5. The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin according to claim 2, characterized in that: The power generation of the pumped storage power station in the i-th unit time period is equal to the product of the power generation of the pumped storage power station in the i-th unit time period and the length of the unit time period; When the pumped storage power station is in pumping mode, the calculation formula for the power generation of the pumped storage power station is: Among them, P g is the power generation power of the pumped storage power station in pumping mode; ρ is the working fluid density; g is the ground gravity acceleration; Q is the working fluid volume flow rate; H is the standard height of the upper reservoir of the pumped storage power station; h f is the head loss; η g is the efficiency of the pump in the pumped storage power station; When the pumped storage power station is in power generation mode, the calculation formula for the power generation power of the pumped storage power station is: Among them, P p is the power generation power of the pumped storage power station in power generation mode; η p is the efficiency of the turbine in the pumped storage power station.

6. The method for coordinated operation of a pumped storage power station and a hydropower station in the same basin according to claim 3 is characterized in that: The scheduling cycle is one day, and the unit time period is one hour; the lower limit of the water level is determined based on the dead water level, and the upper limit of the water level is determined based on the normal water storage level or the flood limit water level.

7. A device for coordinated operation of a pumped storage power station and a hydropower station in the same basin, characterized in that: The pumped storage power station and the co-basin hydropower station coordinated operation device comprises: An operation model establishment module is used to establish an operation model for the coordinated operation of a pumped-storage power station and a hydropower station in the same basin; the operation model includes an objective function and constraints, the objective function takes minimizing the deviation value as an optimization target, the deviation value is the deviation value between the coordinated operation power generation of the pumped-storage power station and the hydropower station in the same basin and the grid load, and the constraints include water balance and water level storage capacity constraints, pumping and power generation constraints of the pumped-storage power station, output constraints of the pumped-storage power station and the hydropower station in the same basin, unit start-up and shutdown duration and maximum start-up and shutdown times constraints, and unit generating head constraints; The operation model solving module is used to solve the operation model to obtain the operation plan of the pumped storage power station when the pumped storage power station operates in coordination with the hydropower station in the same basin; the operation plan includes the operation mode and power generation of the pumped storage power station in each unit time period in the scheduling cycle, and the operation mode includes the power generation mode and the pumping mode.

8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for coordinated operation of a pumped storage power station and a hydropower station in the same basin as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for coordinated operation of a pumped storage power station and a hydropower station in the same river basin described in any one of claims 1 to 6 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for coordinated operation of a pumped storage power station and a hydropower station in the same river basin described in any one of claims 1 to 6 is implemented.

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