Pumped storage power station and related device

Abstract

The application discloses a pumped storage power station and a same-basin hydropower station cooperative operation method and related device, relates to the technical field of pumped storage power station and hydropower station cooperative operation, and the method comprises the steps of: establishing a pumped storage power station and a same-basin hydropower station cooperative operation operation model, the operation model comprises a target function and a constraint condition, the target function takes the deviation value between the pumped storage power station and the same-basin hydropower station cooperative operation power generation and the power grid load as the optimization target, the constraint condition comprises water balance and water level storage constraint, pumped storage power station pumping and power generation constraint, pumped storage power station and same-basin hydropower station output constraint, unit start-stop duration and maximum start-stop times constraint and unit power generation water head constraint; the operation model is solved to obtain the operation scheme of the pumped storage power station when the pumped storage power station and the same-basin hydropower station are cooperatively operated. The application can provide a reference for the actual cooperative operation of the pumped storage power station and the same-basin hydropower station.

Description

Technical Field

[0001] This application relates to the field of coordinated operation technology of pumped storage power stations and hydropower stations, and in particular to a method and related apparatus for coordinated operation of pumped storage power stations and hydropower stations in the same river basin. Background Technology

[0002] The increasing demand for safe and stable operation of the power grid places 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 power quality.

[0003] Pumped storage power stations, recognized as large-scale, cost-effective, and environmentally friendly energy storage power sources, are currently the most stable, mature, safe, and economical form of energy storage. Pumped storage power stations possess multiple functions, including peak shaving and valley filling, energy storage, frequency regulation, phase regulation, emergency backup, and black start. Configuring necessary pumped storage power stations can ensure the safe, stable, and economical operation of the power grid and improve the quality of power supply. When pumped storage power stations operate in conjunction with new energy sources such as solar and wind power, they can significantly improve the utilization rate of new energy sources, promote the efficient use of clean energy resources, and achieve energy conservation and emission reduction, resulting in significant economic and social benefits. Pumped storage power stations are an inevitable product of the development of modern smart grids and an indispensable component of the power grid. They play a crucial role in efficiently ensuring the safe and economical operation of the power grid and providing flexible regulation capabilities to meet the diversified needs of the grid. Pumped storage power stations are an important green, low-carbon, clean, and flexible regulating power source for the power system. Accelerating the development of pumped storage power stations is an urgent requirement for building a new power system dominated by new energy sources, and is of great significance for ensuring power supply, ensuring grid security, promoting the consumption of new energy sources, and driving the green and low-carbon transformation of energy.

[0004] Current research focuses primarily on the structure of pumped storage power stations themselves, with less attention paid to the mechanisms of their coordinated operation with other hydropower stations in the same river basin and the potential impacts. This makes it difficult to provide a reference for the actual coordinated operation of pumped storage power stations with other hydropower stations in the same river basin. Summary of the Invention

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

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

[0007] Firstly, this application provides a method for the coordinated operation of a pumped storage power station and hydropower stations in the same river basin. The downstream reservoir of the pumped storage power station is the reservoir of each hydropower station in the same river basin as the pumped storage power station. The method for the coordinated operation of the pumped storage power station and hydropower stations in the same river basin includes:

[0008] An operational model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin is established. The operational model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints.

[0009] Solving the operation model yields the operation scheme of the pumped storage power station when it operates in coordination with other hydropower stations in the same basin. The operation scheme includes the operation mode and power generation of the pumped storage power station in each unit time period of the scheduling cycle. The operation mode includes a power generation mode and a pumping mode.

[0010] Secondly, this application provides a device for the coordinated operation of a pumped storage power station and a hydropower station in the same river basin, the device comprising:

[0011] The operation model establishment module is used to establish an operation model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. The operation model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints.

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

[0013] Thirdly, this application provides a computer device, 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 above-described method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin.

[0014] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin.

[0015] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the above-described method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin.

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

[0017] This application provides a method and related apparatus for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin. An operational model for the coordinated operation of the pumped-storage power station and the hydropower station in the same river basin is established. The operational model includes an objective function and constraints. The objective function aims to minimize the deviation between the power generation of the pumped-storage power station and the power grid load during coordinated operation. The constraints include water balance and reservoir capacity constraints, pumping and power generation constraints, 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 number of start-ups and shutdowns constraints, and unit head constraints. Solving the operational model yields the operational scheme of the pumped-storage power station during coordinated operation with the hydropower station in the same river basin. The operational scheme includes the operating mode and power generation of the pumped-storage power station in each unit time period of the scheduling cycle. The operating modes include a power generation mode and a pumping mode. By establishing and solving the operational model, this application can determine the operational scheme 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, providing a reference for the actual coordinated operation of pumped-storage power stations and hydropower stations in the same river basin. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0020] Figure 2 This is a flowchart illustrating a method for coordinated operation of a pumped storage power station and a hydropower station in the same river basin, as provided in Embodiment 1 of this application.

[0021] Figure 3 This is a detailed flowchart illustrating a method for coordinated operation of a pumped storage power station and a hydropower station in the same river basin, as provided in Embodiment 1 of this application.

[0022] Figure 4 This is a schematic diagram of the functional modules of a pumped storage power station and a hydropower station in the same river basin, provided in Embodiment 2 of this application.

[0023] Figure 5 This is a schematic diagram of the structure of a computer device provided in Embodiment 3 of this application. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Example 1

[0026] The method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin provided in this application embodiment can be applied to, for example... Figure 1 The application environment is illustrated. The terminal communicates with the server via a network. A data storage system stores the data the server needs to process. This system can be set up independently, integrated into the server, or located in the cloud or on another server. The terminal can send a computational request (requesting the operation plan of the pumped-storage power station within the scheduling cycle) to the server. Upon receiving the request, the server establishes an operational model for the coordinated operation of the pumped-storage power station and other hydropower stations in the same basin. This model includes an objective function and constraints. The objective function aims to minimize the deviation value. Constraints include water balance and reservoir capacity constraints, pumping and power generation constraints, output constraints of the pumped-storage power station and other hydropower stations in the same basin, unit start-up and shutdown duration and maximum number of start-ups and shutdowns constraints, and unit head constraints. The operational model is solved to obtain the operation plan of the pumped-storage power station during coordinated operation with other hydropower stations in the same basin. This plan includes the operation mode and power generation of the pumped-storage power station for each unit time period within the scheduling cycle. The server can then feed back the obtained operation plan for the computational request to the terminal.

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

[0028] The terminal can be, but is not limited to, various desktop computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. The server can be a standalone server or a server cluster composed of multiple servers, or it can 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 river basin is provided. This method is executed by computer equipment, specifically by a terminal or server alone, or by both a terminal and a server. In this embodiment, the method is applied to... Figure 1 Taking the server in the example, the following steps are included:

[0030] Step S1: Establish an operation model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. The operation model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints.

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

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

[0033] In this embodiment, the pumped storage power station can also be called a pumped storage power station. It is a power station that pumps water from the lower reservoir to the upper reservoir for energy storage, and then releases water from the upper reservoir to the lower reservoir for power generation. The lower reservoir of the pumped storage power station is the reservoir of each hydropower station in the same river basin as the pumped storage power station. That is, the pumped storage power station pumps water from the reservoirs of the hydropower stations. The water in the reservoirs of each hydropower station is supplied 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 limit the number of hydropower stations or the number of reservoirs of the hydropower stations.

[0034] To analyze the dynamic response characteristics of pumped storage power stations and hydropower stations in the same river basin operating in a coordinated manner across time and space scales, this embodiment proposes an operational model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. This model is a dynamic response simulation model, and the particle swarm optimization algorithm is used to solve the operational model. Based on the daily load data of typical months issued by the power grid, the hourly pumping and releasing scheme of pumped storage power stations from the reservoirs of hydropower stations in the same river basin is calculated and analyzed to meet the load demand. The scheduling method of pumped storage power stations under the daily load conditions of different typical months is quantitatively analyzed to achieve the balance between pumping and power generation in typical months, providing a certain reference for the actual coordinated operation of pumped storage power stations and hydropower stations in the same river basin.

[0035] This embodiment first determines the objective function for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin under conditions spanning time and space. The objective function aims to minimize the deviation between the power generation of the pumped storage power station and the power grid load during coordinated operation. The objective function is as follows:

[0036]

[0037] In equation (1), F is the objective function value; min(·) achieves flexible scheduling of pumped storage power stations and hydropower stations in the same river basin by minimizing the deviation between the power generation and grid load of the pumped storage power station and the hydropower station in the same river basin during coordinated operation; 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, and the unit time period can be one hour. One day includes 24 hours, so T is 24; Z t Let G be the power generation of the pumped storage power station in the t-th unit time period, i.e., select the hourly power generation (kW·h) of the pumped storage power station on that day; t Let S be the total power generation of all hydropower stations in the t-th unit time period, i.e., select the hourly power generation (kW·h) of the hydropower stations on that day; t The load of the power grid in the t-th unit time period is determined by selecting the hourly load (kW·h) of the power grid on that day, which is determined by the daily load data issued by the power grid.

[0038] The power generation of a 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 duration of the unit time period.

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

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

[0041]

[0042] In equation (2), P gρ represents the power generation of the pumped storage power station in pumping mode; ρ is the density of the working fluid (usually water) (kg / m³). 3 g is the ground acceleration due to gravity (m / s²). 2 Q is the volumetric flow rate of the working fluid (m³ / s). 3 / s); H is the standard height (m) of the upper reservoir of the pumped storage power station; h f For head loss; η g This refers to the efficiency of the pumps in a pumped storage power station.

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

[0044]

[0045] In equation (3), P p η represents the power generation capacity of the pumped storage power station when it is in power generation mode. p This refers to the efficiency of the turbines in a pumped storage power station.

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

[0047] The water balance and reservoir capacity constraints are as follows:

[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 Let V be the reservoir capacity of the j-th hydropower station in the (t+1)-th unit time interval, which is the reservoir capacity of the j-th hydropower station at the end of the t-th unit time interval; j,tLet I be the reservoir capacity of the j-th hydropower station in the t-th unit time period; j,t Let q be the inflow rate of the reservoir of the j-th hydropower station during the t-th unit time period; j,t Let be the outflow from the reservoir of the j-th hydropower station during the t-th unit time period; Δt be the duration of the unit time period; α be the loss coefficient, specifically the loss coefficient for pumping water from the downstream power station to the upstream power station, typically taken as 0.88–0.91; q k,t Let H be the outflow from pumped storage power station k in the t-th unit time period; i,min H represents the lower limit of the water level in the reservoir of the i-th power station. The power station includes pumped storage power stations and every other hydropower station within the same river basin as the pumped storage power station. The reservoir of a pumped storage power station refers to its upper reservoir. i H represents the water level of the reservoir at the i-th power station. i,max H represents the upper limit of the water level in the reservoir of the i-th power station; i,end V represents the control water level of the reservoir at the end of the scheduling cycle for the i-th power station; ΔH represents the allowable water level deviation within the scheduling cycle to prevent impact on the next scheduling cycle; V i,min V represents the lower limit of the reservoir capacity of the i-th power station; i V represents the reservoir capacity of the i-th power station; i,max Let be the upper limit of the reservoir capacity of the i-th power station.

[0054] Pumped storage power stations operate in two modes: pumping and power generation. Based on these modes, the station's operating status is defined, and specific pumping and power generation modes are assigned. To ensure stable power output, switching to another mode is only permitted after maintaining the same mode for a certain period. The station cannot arbitrarily switch between pumping and power generation modes. Therefore, the constraints on pumping and power generation are as follows:

[0055]

[0056] In equation (9), A binary variable representing whether a pumped storage power station is in pumping mode in the t-th unit of time interval, The value is either 0 or 1. If it is in pumping mode, then otherwise, A binary variable characterizing whether a pumped storage power station is in power generation mode in the t-th unit time period. The value is either 0 or 1. If it is in power generation mode, then otherwise,

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

[0058] P i,t =η·Q i,t ·hi,t (10)

[0059] In equation (10), P i,t Let be the power generation of the i-th power station in the t-th unit time period; η is the output coefficient of the i-th power station in the t-th unit time period; Q i,t h is the volumetric flow rate of the working fluid (generally water) used by the i-th power plant during the t-th unit time period; i,t Let be the average net head of the i-th power station in the t-th unit time period.

[0060] The constraints on the duration of unit start-up and shutdown and the maximum number of start-up and shutdown operations are as follows:

[0061]

[0062] In the above formula, x i,n,t Let x be the start-up operation variable of the nth unit in the i-th power plant during the t-th time period. If the nth unit in the i-th power plant performs a start-up operation during the t-th time period, then x i,n,t =1, otherwise, x i,n,t =0; y i,n,t Let y be the shutdown operation variable of the nth unit in the i-th power plant during the t-th time period. If the nth unit in the i-th power plant performs a shutdown operation during the t-th time period, then y i,n,t =1, otherwise, y i,n,t =0; γ i,n,t Let γ be the operating state variable of the nth unit in the i-th power plant during the t-th time period. If the nth unit in the i-th power plant is in the operating state during the t-th time period, then γ i,n,t =1, otherwise, γ i,n,t =0; γ i,n,t-1 Let γ be the operating state variable of the nth unit in the i-th power plant during the (t-1)-th unit time period. If the nth unit in the i-th power plant is in the operating state during the (t-1)-th unit time period, then γ i,n,t-1 =1, otherwise, γ i,n,t-1 =0; δ is the technical subscript; Let n be the minimum operating duration of the nth generating unit in the i-th power plant. Let T be the minimum downtime of the nth generating unit in the i-th power plant; T is the total number of time periods in the scheduling cycle. This represents the maximum number of times the nth generating unit in the i-th power plant can be started within the scheduling cycle.

[0063] The head constraint for generating water in the unit is:

[0064]

[0065] In equation (13), hi,n,t Z represents the net head of water generated by the nth generating unit in the i-th power plant during the t-th time unit. i,t-1 Z represents the dead water level of the i-th power station at the end of the (t-1)-th unit time period; i,t Let be the dead water level of the i-th power station at the end of the t-th unit time period; Let be the tailwater level of the i-th power station at the end of the t-th unit time period; Let be the head loss value of the nth generating unit in the i-th power station during the t-th unit time period.

[0066] Based on this, this embodiment establishes an operation model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. The operation model includes the above-mentioned objective function and constraints. This embodiment further obtains various basic information of pumped storage power stations and hydropower stations in the same river basin, daily load data issued by the power grid in typical months, and parameters such as daily water flow and reservoir water level of hydropower stations. The basic information for pumped storage power stations and hydropower stations in the same basin includes the normal water level, dead water level, flood control limit water level, regulating capacity, installed capacity, and rated head of the reservoir. The normal water level is the highest water level the reservoir can reach under normal operating conditions. The dead water level is the lowest water level the reservoir is allowed to drop under normal operating conditions. The flood control limit water level is the highest water level the reservoir is allowed to store for beneficial purposes during the flood season. The regulating 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 their rated output under normal conditions. Based on this basic information, upper and lower limits in the operating 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 control limit water level. Daily load data from the power grid in typical months is used to determine the hourly load of the power grid.

[0067] In this embodiment, the above-mentioned operating model can be solved using the particle swarm optimization algorithm. Therefore, in S2, the operating model is solved to obtain the operating scheme of the pumped storage power station when it operates in conjunction with other hydropower stations in the same river basin. Specifically, this includes solving the operating model using the particle swarm optimization algorithm to obtain the operating scheme of the pumped storage power station when it operates in conjunction with other hydropower stations in the same river basin, i.e., solving for Z in the objective function. t When Z t A positive value indicates that the system is in power generation mode. t A negative value indicates that the pumping mode is in operation. The operation plan includes the operation mode and power generation of the pumped storage power station in each unit time period of the scheduling cycle. The operation mode includes power generation mode and pumping mode. That is, the scheduling method of pumped storage power station is quantitatively analyzed under the daily load conditions of different typical months, and the hourly pumping and power generation plan of pumped storage power station is output to achieve the balance between pumping and power generation and meet the needs of the daily load data issued by the power grid.

[0068] This embodiment provides a method for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin, applicable to the field of coordinated operation technology of pumped-storage power stations and hydropower stations in the same river basin, such as... Figure 3 As shown, this includes acquiring basic information such as normal water level, dead water level, flood control limit water level, regulating reservoir capacity, installed capacity, and rated head of pumped storage power stations and hydropower stations in the same basin; acquiring daily load data from the power grid in typical months; acquiring parameters such as daily water flow and reservoir water level of hydropower stations; clarifying the independent operation characteristics of pumped storage power stations and hydropower stations and their coordinated operation characteristics with hydropower stations in the same basin; setting the working status of pumped storage power stations; determining the objective function for the coordinated operation of pumped storage power stations and hydropower stations in the same basin; determining the constraints for the coordinated operation of pumped storage power stations and hydropower stations in the same basin; and using particle swarm optimization algorithm to solve and output a pumped storage power station's hourly water pumping and releasing scheme from the reservoir of the hydropower station in the same basin, achieving a balance between pumping and power generation in typical months to meet load demand. Compared with traditional research on pumped storage power stations, the purpose of this embodiment is to calculate and analyze the hourly water pumping and releasing scheme of pumped storage power stations from the reservoirs of hydropower stations in the same river basin based on the daily load data of typical months issued by the power grid, so as to meet the load demand. Specifically, it proposes an operation model of pumped storage power stations and hydropower stations in the same river basin operating in coordination under different spatiotemporal scales, and uses particle swarm optimization algorithm to solve the model. It quantitatively analyzes the scheduling method of pumped storage power stations under the daily load conditions of different typical months, realizes the balance of pumping and power generation in typical months, and provides a certain reference for the actual coordinated operation of pumped storage power stations and hydropower stations in the same river basin.

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

[0070] Example 2

[0071] Based on the same inventive concept, this application also provides a device for coordinating the operation of pumped-storage power stations and hydropower stations in the same river basin, used to implement the above-mentioned method for coordinated operation of pumped-storage power stations and hydropower stations in the same river basin. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations in the embodiments of the device for coordinating the operation of pumped-storage power stations and hydropower stations in the same river basin provided below can be found in the limitations of the method for coordinated operation of pumped-storage power stations and hydropower stations in the same river basin described above, and 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. The device includes:

[0073] The operation model establishment module M1 is used to establish an operation model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. The operation model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints.

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

[0075] Example 3

[0076] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 5 As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a method for the coordinated operation of a pumped-storage power station and a hydropower station in the same river basin.

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

[0078] In one 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 pumped storage power stations and hydropower stations in the same river basin as described in Embodiment 1.

[0079] Example 4

[0080] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin as described in Embodiment 1.

[0081] Example 5

[0082] This application provides a computer program product, including a computer program that, when executed by a processor, implements the method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin as described in Embodiment 1.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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 document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for coordinated operation of a pumped storage power station and hydropower stations in the same river basin, wherein the lower reservoir of the pumped storage power station is the reservoir of each hydropower station in the same river basin as the pumped storage power station, characterized in that, The method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin includes: An operational model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin is established. The operational model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints. The operation model is solved to obtain the operation scheme of the pumped storage power station when it operates in coordination with hydropower stations in the same basin. The operation scheme includes the operation mode and power generation of the pumped storage power station in each unit time period of the scheduling cycle. The operation mode includes power generation mode and pumping mode. The objective function is: ； in, F The objective function value; T This represents the total number of time intervals within the scheduling cycle. For pumped storage power stations in the first t Electricity generated per unit time period; For all hydroelectric power stations in the first t Total power generation per unit time period; For the power grid in the first t Load per unit time period; Pumped storage power station in the i The power generation per unit time period is equal to that of the pumped storage power station in the first unit time period. i The product of the power generation per unit time period and the duration of the unit time period; When a pumped storage power station is in pumping mode, the formula for calculating the power generation of the pumped storage power station is: ； in, This refers to the power generation capacity of a pumped storage power station when it is in pumping mode. The density of the working fluid; This refers to the acceleration due to gravity on the ground. The volumetric flow rate of the working fluid; This refers to the standard height of the upper reservoir of a pumped storage power station. This is due to head loss; The efficiency of the pumps in a pumped storage power station; When a pumped storage power station is in power generation mode, the formula for calculating the power generation capacity of the pumped storage power station is: ； in, This refers to the power generation capacity of the pumped storage power station when it is in power generation mode. This refers to the efficiency of the turbines in a pumped storage power station.

2. The method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin according to claim 1, characterized in that, The water balance and reservoir capacity constraints are as follows: ； ； ； ； ； in, For the first j The reservoir of the hydropower station is in the first t +1 unit time period of storage capacity; For the first j The reservoir of the hydropower station is in the first t The storage capacity per unit time period; For the first j The reservoir of the hydropower station is in the first t Inbound flow rate per unit time period; For the first j The reservoir of the hydropower station is in the first t Outbound flow rate per unit time period; The duration of a unit of time; This is the loss coefficient; For pumped storage power station k In the t Outbound flow rate per unit time period; For the first i The lower limit of the water level of the reservoir of a power station. The power station includes pumped storage power stations and each hydropower station in the same river basin as the pumped storage power station. The reservoir of a pumped storage power station refers to the upper reservoir of the pumped storage power station. For the first i The water level of the reservoir at the power station; For the first i The upper limit of the water level in the reservoir of each power station; For the first i The control water level of the reservoir of each power station at the end of the scheduling cycle; This refers to the allowable water level deviation within the scheduling cycle; For the first i The lower limit of the reservoir capacity of each power station; For the first i The reservoir capacity of the power station; For the first i The upper limit of the reservoir capacity of each power station; The constraints for pumped storage power stations in terms of pumping and power generation are: ； in, To characterize the pumped storage power station in the first t A binary variable indicating whether a given time period is in pumping mode; if it is in pumping mode, then... =1, otherwise, =0; To characterize the pumped storage power station in the first t Whether a given time period is in a power generation mode is a binary variable; if it is in a power generation mode, then... =1, otherwise, =0; The output constraints of the pumped storage power station and the hydropower station in the same river basin are as follows: ； in, For the first i The power station in the first t Power generation per unit time period; This is the output coefficient; For the first i The power station in the first t The volumetric flow rate of the working fluid used for power generation per unit time period; For the first i The power station in the first t Average net head per unit time period; The constraints on the unit start-up and shutdown duration and the maximum number of start-up and shutdown cycles are as follows: ； ； in, For the first i The first of the power stations n The unit was in the first t The power-on operation variable for a unit time period, if the first... i The first of the power stations n The unit was in the first t If the power-on operation is performed within a certain time period, then =1, otherwise, =0; For the first i The first of the power stations n The unit was in the first t The shutdown operation variable for each unit time period, if the first... i The first of the power stations n The unit was in the first t If a shutdown operation is performed within a certain time period, then =1, otherwise, =0; For the first i The first of the power stations n The unit was in the first t The running state variable of the unit time period, if the first i The first of the power stations n The unit was in the first t If the machine is in an on-running state for a given time period, then =1, otherwise, =0; For the first i The first of the power stations n The unit was in the first t- The running state variable for a unit time period, if the first... i The first of the power stations n The unit was in the first t- If the machine is in an on- and running state for one unit of time period, then =1, otherwise, =0; Technical subscript; For the first i The first of the power stations n Minimum operating duration for each unit; For the first i The first of the power stations n Minimum downtime duration for each unit; T This represents the total number of time intervals within the scheduling cycle. For the first i The first of the power stations n The maximum number of times a unit can be started within a scheduling cycle; The generator head constraint is: ； in, For the first i The first of the power stations n The unit was in the first t The net head of water generated per unit time period; For the first i The power station in the first t -1 unit time period dead water level; For the first i The power station in the first t Dead water level per unit time period; For the first i The power station in the first t The tailwater level for each unit time period; For the first i The first of the power stations n The unit was in the first t Head loss value per unit time period.

3. The method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin according to claim 1, characterized in that, Solving the aforementioned operating model yields the operating scheme of the pumped storage power station when it operates in conjunction with other hydropower stations in the same river basin. Specifically, this includes solving the operating model using a particle swarm optimization algorithm to obtain the operating scheme of the pumped storage power station when it operates in conjunction with other hydropower stations in the same river basin.

4. The method for coordinated operation of pumped storage power stations and hydropower stations in the same river basin according to claim 2, 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 storage water level or the flood limit water level.

5. A device for coordinated operation of a pumped-storage power station and a hydropower station in the same river basin, characterized in that, The pumped storage power station and the hydropower station in the same river basin are coordinated operation devices including: The operation model establishment module is used to establish an operation model for the coordinated operation of pumped storage power stations and hydropower stations in the same river basin. The operation model includes an objective function and constraints. The objective function aims to minimize the deviation value, which is the deviation between the power generation of the pumped storage power station and the hydropower station in the same river basin and the grid load. The constraints include water balance and reservoir 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 number of start-up and shutdown constraints, and unit power generation head constraints. The operation model solving module is used to solve the operation model to obtain the operation scheme of the pumped storage power station when it operates in coordination with the hydropower station in the same basin. The operation scheme includes the operation mode and power generation of the pumped storage power station in each unit time period of the scheduling cycle. The operation mode includes the power generation mode and the pumping mode. The objective function is: ； in, F The objective function value; T This represents the total number of time intervals within the scheduling cycle. For pumped storage power stations in the first t Electricity generated per unit time period; For all hydroelectric power stations in the first t Total power generation per unit time period; For the power grid in the first t Load per unit time period; Pumped storage power station in the i The power generation per unit time period is equal to that of the pumped storage power station in the first unit time period. i The product of the power generation per unit time period and the duration of the unit time period; When a pumped storage power station is in pumping mode, the formula for calculating the power generation of the pumped storage power station is: ； in, This refers to the power generation capacity of a pumped storage power station when it is in pumping mode. The density of the working fluid; This refers to the acceleration due to gravity on the ground. The volumetric flow rate of the working fluid; This refers to the standard height of the upper reservoir of a pumped storage power station. This is due to head loss; The efficiency of the pumps in a pumped storage power station; When a pumped storage power station is in power generation mode, the formula for calculating the power generation capacity of the pumped storage power station is: ； in, This refers to the power generation capacity of the pumped storage power station when it is in power generation mode. This refers to the efficiency of the turbines in a pumped storage power station.

6. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that 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 river basin, as described in any one of claims 1-4.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for coordinated operation of pumped storage power stations and hydropower stations in the same basin as described in any one of claims 1-4.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, it implements the method for coordinated operation of pumped storage power stations and hydropower stations in the same basin as described in any one of claims 1-4.

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