Pumped storage and new energy generation collaborative automatic generation control method

Abstract

A kind of pumped storage and new energy generation collaborative automatic generation control method, including multiple control cycles, each control cycle includes the following steps: collecting multiple parameter data of power system, and calculating economic power purchase value according to the data collected;According to the situation of data acquisition, the operating mode of control system is switched;In grid-connected state, control system generates operation control instruction;The operation control instruction is sent to operating equipment by wireless communication or hardwired form, and a control cycle is completed.The present application can guarantee the power grid power, frequency stable condition to improve the penetration rate of new energy as far as possible, while improving the economic benefit of pumped storage power station and power grid auxiliary service ability of wind and light power station joint transmission system.

Description

Technical Field

[0001] This invention belongs to the field of power system dispatch automation, and specifically relates to a coordinated automatic power generation control method for pumped storage and new energy power generation. Background Technology

[0002] A pumped-hydro power station, also known as a hydroelectric power station, pumps water from an upper reservoir to store energy. It is generally used for peak shaving, frequency regulation, phase regulation, and emergency backup in the power grid. When the grid load is low, the power consumed by the pumped-hydro power station is used to pump water from the lower reservoir to the upper reservoir, thus storing electrical energy. Conversely, when the grid load is high, the pumped-hydro power station can pump water from the upper reservoir to the lower reservoir to supply power to the grid. Although some energy loss is inevitable during the entire operation, it is more economical than the energy lost by large coal-fired power plants through unit start-up and shutdown for peak shaving. In addition, pumped-hydro power stations can also perform dynamic functions such as frequency regulation, phase regulation, and emergency backup. Therefore, pumped-hydro power stations are both power sources and electricity users; they are an important tool for power grid operation and management, and a pillar for ensuring the safe, economical, and stable operation of the power grid.

[0003] With the large-scale integration of new energy power generation such as photovoltaic and wind power into the power grid, the strong randomness, unpredictability, and anti-peak-shaving characteristics of new energy make it increasingly difficult to control the active power of the power grid, and the phenomenon of "curtailment of solar power" and "curtailment of wind power" occurs from time to time.

[0004] In the face of the problem of active power balance in the power system under the large-scale grid connection of new energy sources, if the adjustment capabilities of pumped power stations at different time scales can be fully utilized, the fluctuations in new energy output and the trough characteristics of new energy output can be smoothed out. This will play a significant role in solving the problems of large-scale grid connection and consumption of new energy sources and the curtailment of solar and wind power.

[0005] Currently, my country's research on control methods for pumped power stations to coordinate with new energy power generation is insufficient, and an effective control method for pumped power stations to coordinate with new energy power generation has not yet been formed. It is also impossible to effectively solve problems such as large-scale grid connection and consumption of new energy and grid curtailment of solar and wind power by utilizing pumped power stations. Summary of the Invention

[0006] This invention provides an automatic power generation control method for a pumped storage power station combined with a wind and solar power station for power transmission. It is applied to such a system to smooth out fluctuations in renewable energy output, maximize the penetration rate of renewable energy while ensuring stable power and frequency in the power grid, and simultaneously improve the economic benefits and grid auxiliary service capabilities of the pumped storage power station combined with a wind and solar power station for power transmission.

[0007] To overcome the shortcomings of existing technologies and achieve optimized control of pumped storage power stations in conjunction with wind and solar power stations for power transmission, the technical solution adopted in this invention is as follows:

[0008] A coordinated automatic power generation control method for pumped storage and renewable energy generation, characterized by comprising multiple control cycles, each control cycle including the following steps:

[0009] Step 1: Collect data on multiple parameters of the power system and calculate the economic value of electricity purchase based on the collected data;

[0010] Step 2: Based on the collected data, switch the operating mode of the control system;

[0011] Step 3: In grid-connected mode, the control system generates operational control commands;

[0012] Step 4: Send the operation control command to the operating device via wireless communication or hardwired connection, and complete one control cycle.

[0013] The present invention also discloses a non-volatile storage medium, characterized in that the non-volatile storage medium includes a stored program, wherein the program, when running, controls the device where the non-volatile storage medium is located to execute the above-described method.

[0014] The present invention also discloses an electronic device, characterized in that it comprises a processor and a memory; the memory stores computer-readable instructions, and the processor is used to execute the computer-readable instructions, wherein the computer-readable instructions execute the method described above.

[0015] Beneficial effects

[0016] By utilizing the adjustment capabilities of pumped storage power stations at different time scales, fluctuations in renewable energy output can be smoothed out, and the trough characteristics of renewable energy output can be regulated. This will play a significant role in solving problems such as large-scale grid connection and consumption of renewable energy and grid curtailment of solar and wind power.

[0017] The abstraction and seamless automatic switching of the three operating modes of "operator manual", "operator automatic" and "coordinated automatic" are conducive to significantly improving the automation level of pumped storage power stations on the basis of safe and stable operation, reducing the amount of operation and the operation threshold for operators, and improving the utilization rate of each control loop of the pumped storage unit.

[0018] Based on the output status of pumped storage and new energy sources, eight basic control states are abstracted, which can complete automatic control for different system operating states, realize the smoothing of new energy output fluctuations, maximize the penetration rate of new energy sources while ensuring the stability of grid power and frequency, and improve the economic benefits and grid auxiliary service capabilities of the pumped storage power station in conjunction with the wind and solar power station. Attached Figure Description

[0019] Figure 1 This is a logic block diagram of the present invention.

[0020] Figure 2 This is a logic block diagram for switching between the three operating modes of the present invention. Detailed Implementation

[0021] To address the aforementioned technical problems, this invention proposes an automatic power generation control method for a pumped-storage power station combined with a wind-solar power station power transmission system. This method can fully utilize the active power regulation capabilities of pumped-storage power stations, reduce the impact of renewable energy output fluctuations on the active power frequency of the power system under large-scale renewable energy grid integration, and promote renewable energy consumption. The technical solution adopted by this invention is as follows:

[0022] The automatic power generation control method for a pumped storage power station combined with a wind and solar power station transmission system of the present invention completes four main steps in each control cycle:

[0023] Step 1: Collect multiple parameter data of the power system and calculate the economic value of electricity purchase based on the collected data; the collected data includes, but is not limited to, tie line frequency, wind and solar power output, pumped storage unit output, pumped storage upper reservoir water level, daily planned power generation of wind and solar power, midday planned power generation, real-time predicted power generation and other operating parameters.

[0024] The frequency of tie lines can typically be calculated using algorithms based on periodicity, analytical methods, or the principle of error minimization, and can be read from the power plant's data acquisition system. A tie line, officially called a power system tie line, is a dedicated conductor connecting the power plant and the grid, capable of bidirectional power transmission. The output power of wind and solar power generation and the output power of pumped storage units are read from the transformers of the wind / solar power station and pumped storage unit, respectively. The water level of the upper reservoir in pumped storage is obtained from the water level monitoring system of the pumped storage unit. The planned daily and midday power generation of wind and solar power generation are given by the grid dispatch automation system based on the output of the wind and solar power stations and the grid load. Real-time predicted power generation operating parameters are obtained through the combined action of power generation operating parameters given by the power prediction algorithm of the wind and solar power plants and the predicted power generation operating parameters of the pumped storage power stations. All data acquisition and processing are fully automated in the "coordinated control" operation mode.

[0025] After collecting data, the system will calculate whether the economic electricity purchase conditions are met based on the current operating status data. The economic electricity purchase conditions are met when the revenue from purchasing electricity from the grid exceeds the cost of purchasing electricity from the grid. In this case, the control system will purchase electricity from the grid to improve economic efficiency. The following will elaborate on the theoretical basis for determining the economic electricity purchase conditions, the role of the constraints on economic electricity purchase conditions, the effect of economic electricity purchase on the system, and how to determine the economic electricity purchase conditions:

[0026] The control system considers the planned daily power generation, midday planned power generation, current electricity price, and ancillary service compensation factors of wind and solar power generation. It establishes a multi-objective optimization algorithm with the goal of maximizing operational revenue and grid ancillary service benefits. The algorithm that obtains the optimal value of this multi-objective optimization objective function is called a multi-objective optimization algorithm. This optimal value is defined as follows: in the state of the optimal value, there is no situation where at least one objective is improved without worsening any other objective. This optimal value is also called Pareto optimal. The set of all Pareto optimal solutions constitutes the Pareto optimal solution set. These solutions, mapped through the objective function, constitute the Pareto optimal front or Pareto front surface of the problem. That is, the objective function value corresponding to the Pareto optimal solution is the Pareto front. However, in practical engineering applications, the weights of the multiple objectives are adjusted when seeking the optimal solution to meet different engineering expectations. This is one of the functions of the constraints in the formula. Besides adjusting the weights of different optimization objectives to adjust the feasible solution set, the constraints in the formula in step 1 can also be used to represent how the optimization objectives mutually constrain each other and the rules governing decision information and optimization objectives.

[0027] A Pareto front is obtained using a multi-objective optimization algorithm, such as the Non-Dominated Sorting Genetic Algorithm with Elite Strategy (NSGA-II). Then, the optimal solution is selected from the Pareto solution set based on the actual engineering requirements. When the optimal solution, as the final result, is higher than the threshold given by the operator, or higher than the economic electricity purchase cost under coordinated control operation mode, it is considered to meet the economic electricity purchase condition. In this case, the system controls the pumped storage power station to absorb electricity from the grid for pumping to obtain higher profits.

[0028] The specific method for determining economical electricity purchase conditions is described below. All input data below comes from the aforementioned data collection process:

[0029] The economic operating cost of coal consumption for conventional thermal power units can be described by the following model:

[0030]

[0031] In the formula, i is the thermal power unit number, and n is the number of thermal power units; f(P fi ) represents the output P of generator set i. fi The corresponding coal consumption, f(P) fi ) = a i P fi 2 +b i P fi +c i a i b i c i For operating consumption characteristic parameters; S iWhen the unit is in a state of participation in regulation, and its output exceeds the upper limit or falls below the lower limit, the unit does not participate in AGC regulation. i =0, conversely, S i =1.

[0032] The droop time of a thermal power unit-pumped storage unit can be modeled as follows:

[0033]

[0034] At a certain moment, the total regional control deviation within the system is ACE. total The current regulation capacity of each AGC unit is ACE. presenti The unit's regulation rate is V i The total number of AGC units is N = m + n, where n is the number of thermal power AGC units and m is the number of hydropower AGC units.

[0035] Let t i Δt represents the time used by each unit individually. i Let Δt be the time difference between the adjustment of each unit and the completion of the overall system adjustment. i =T max -t i The total system settling time T is obtained by sorting. max ,expression:

[0036]

[0037] Δt i When it approaches zero, T is at this point max Let T be the optimal solution. ideal The expression is

[0038]

[0039] The optimal time model is:

[0040]

[0041] ACE (Acute-Arrival-Delayed Area) i As variables, the time-optimal model is:

[0042]

[0043] The upper and lower limits of generator set power are:

[0044]

[0045] Where, P fi.max P fi.min These represent the upper and lower limits of unit i's output, respectively, and n represents the number of thermal power AGC units.

[0046] The upper and lower limits of the active power output of pumped storage units are:

[0047]

[0048] , i and m are the upper and lower limits of the output of pumped storage unit i, respectively, and m is the number of AGC units in the pumped storage power station.

[0049] The reservoir capacity constraint for pumped storage units is:

[0050]

[0051] in,§ g § d S0 and Sp represent the average hydroelectric conversion rate under power generation and pumping conditions, respectively, §=ΔS / ΔP; min S max P represents the initial, minimum, and maximum water capacity of the upper reservoir of the pumped storage power plant. wG P is the power generation capacity of the pumped storage unit; wD This refers to the rated power of the water pump.

[0052] Power balance constraints in multi-source power systems:

[0053]

[0054] Where γj={-1,0,1} represents the state of the pumped storage hydroelectric generator unit, where 0 indicates the unit is in a stopped state, 1 indicates the unit is generating electricity, and -1 indicates the unit is in pumping operation; S i S j These represent the states where thermal power units and pumped-storage units participate in regulation, respectively. When the unit output exceeds the upper limit or falls below the lower limit, the corresponding unit does not participate in AGC regulation. At this time, S i =0, S j =0, otherwise S i =1, S j =1.

[0055] By calculating the above multi-objective optimization problem, the economic electricity purchase value can be obtained. The specific role of the economic electricity purchase conditions is explained in step 3.

[0056] Step 2: Switch the operating mode of the control system based on the collected data.

[0057] The control system has three operating modes: "coordinated automatic", "operator automatic", and "operator manual". The control system is designed according to the principle of hierarchical control. When the "coordinated automatic" mode fails, it automatically switches to the "operator automatic" mode; when the "operator automatic" mode fails, it automatically switches to the "operator manual" mode.

[0058] Data for pumped-storage units comes from pumped-storage power stations; data for photovoltaic (PV) and wind power systems comes from wind and solar power stations. The automatic power generation control system determines whether there are faults in the pumped-storage unit equipment, PV system equipment, wind power system equipment, electrical equipment, optimizers, and data acquisition equipment based on the data collected from each system and the data deviation. If some systems except the optimizer are found to be faulty, the operating mode is directly switched to "Operator Manual." If other systems are operating normally except for the optimizer, the operating mode is directly switched to "Operator Automatic." If all equipment and the optimizer are operating normally, the operating mode can be switched to "Coordinated Automatic." The operating mode can be specified by the operator. The system determines the operating mode, calculates and issues control commands to the pumped-storage unit equipment, PV system equipment, and wind power system equipment. See the appendix for instructions on switching operating modes. Figure 2 The logic block diagram for switching between the three operating modes is shown. All operating mode switching only changes the variables within the control system. Apart from the subsequent control strategy within the control system changing with the operating mode switch, other external devices are not affected.

[0059] Step 3: In grid-connected mode, the control system generates operational control commands;

[0060] In this step, the system calculates and issues control commands to the pumped-storage turbine, photovoltaic power generation system, and wind power generation system based on the operating mode determined in the previous step. In "Operator Manual" mode, the control commands for these systems are manually given by the operator. In "Operator Automatic" mode, the operator inputs the target control state, selecting one of eight modes as the current mode, and the PID controller in the system automatically calculates and issues the control commands. In "Coordinated Automatic" mode, the control state is determined and switched automatically by the optimizer based on the currently collected system operating status, and the system automatically calculates and issues the control commands for these systems. The specific implementation is as follows:

[0061] The control system selects different control command calculation methods based on the current operating mode, resulting in three different scenarios:

[0062] Scenario 1: In the "Operator Manual" operation mode, the operator manually sets the target values ​​for power generation or pumping at the pumped-storage power station, and manually activates or deactivates the wind and solar power stations, while all protection functions remain active. This command is directly output and applied to the wind and solar control system and the pumped-storage power station, requiring no additional calculations.

[0063] Scenario 2: In the "Operator Automatic" operation mode, the operator manually selects one of eight control states as the current control state. The control system automatically sets the target value for power generation or pumping at the pumped storage power station, automatically activates or deactivates the wind and solar power stations, and all protection functions are effective. Based on the target value, the control system calculates instructions for different power generation systems using a mature PID controller or control algorithm. The eight control states are described in detail below:

[0064] The automatic power generation control method of the pumped storage power station and wind-solar power station combined power transmission system of the present invention is applied to the pumped storage power station and wind-solar power station combined power transmission system. The control system operates continuously in grid-connected state and has eight basic control states:

[0065] 1) The frequency of the tie line is lower than the power frequency, and the power generation of wind and solar power stations cannot meet the frequency regulation requirements. Pumped storage power stations generate power to supplement the active power required by the system and jointly output electrical energy.

[0066] 2) The frequency of the tie line is lower than the power frequency, and the power generation of the wind and solar power station cannot meet the frequency regulation requirements. However, the water level of the pumped storage power station is low and cannot generate electricity. The system only outputs electricity from the wind and solar power station.

[0067] 3) The frequency of the tie line is lower than the power frequency. The power generation of the wind and solar power station is greater than or equal to the frequency regulation requirement. The remaining active power is used for pumped storage power station pumping. The system only outputs power from the wind and solar power station.

[0068] 4) The frequency of the tie line is lower than the power frequency. The power generation of the wind and solar power station is greater than or equal to the frequency regulation requirement, but the water level of the pumped storage power station reaches a high value and cannot pump water. The system only outputs power from the wind and solar power station.

[0069] 5) The frequency of the tie line is higher than the power frequency. The power generated by the wind and solar power station is absorbed by the pumped storage power station. When the "economic power purchase conditions" are met, the pumped storage power station also needs to absorb the power from the grid to pump water.

[0070] 6) When the frequency of the tie line is higher than the power frequency and the "economic power purchase conditions" are not met, the pumped storage power station shall only be provided by the wind and solar power station and shall not purchase power from the grid.

[0071] 7) The frequency of the tie line is higher than the power frequency, so the wind and solar power station has no active power output, and the pumped storage power station still needs to absorb the power from the grid to pump water.

[0072] 8) The tie line frequency is higher than the power frequency, but the water level of the pumped storage power station has reached a high value, making it impossible to pump water, and the system does not have frequency regulation capability.

[0073] In the eight control states, the determination of the economic electricity purchase conditions in control states 5 and 6 has been explained in detail in step 1.

[0074] The switching between the above control states is carried out in accordance with the principles of "failure protection" (protective measures taken to prevent the fault from worsening when there is a fault in the system) and "safety self-locking" (maintaining the current system operation state to prevent the fault from worsening when there is a fault in the system).

[0075] Scenario 3: In the "coordinated automatic" operation mode, the control system automatically selects one of eight control states as the current control state based on the current system operating status. The control system automatically sets the target value for power generation or pumping of the pumped storage power station, automatically activates or deactivates the wind and solar power stations, and all protection functions are effective simultaneously. After obtaining the target value, the calculation method for the control command is the same as that for the control command calculation method in the aforementioned "operator automatic" operation mode.

[0076] For scenarios 2 and 3, the control system has the function of automatically starting or stopping the pumped storage power station for power generation or pumping operation under both "operator automatic" and "coordinated automatic" operation modes. When the pumped storage power station is in power generation mode, the control system monitors the tie line frequency, wind and solar power output power, pumped storage unit output power, pumped storage upper reservoir water level, wind and solar planned power generation per day, planned power generation per day, and real-time predicted power generation. Based on one or more of the above parameters, the control system judges the operating status of the joint power transmission system and adjusts and controls the operation of the pumped storage power station according to the operating status to ensure that the pumped storage unit operates according to the predetermined plan.

[0077] Step 4: The operation control command is sent to the operating device via wireless communication or hardwired connection to complete one control cycle.

[0078] The control commands determined in the previous step for the pumped storage unit, photovoltaic power generation system, and wind power generation system are output to their respective sub-control systems via communication or hardwiring, and the control actions are completed. This concludes one control cycle. The system then prepares to begin the next control cycle when the controller time reaches the next control cycle.

[0079] The control system can work in conjunction with the following control systems, providing the necessary interfaces and instructions to realize all operations of the pumped storage power station and the combined wind and solar power station power transmission system under various operating modes.

[0080] 1) Pumped storage unit control system

[0081] 2) Wind turbine control system

[0082] 3) Photovoltaic power generation control system

[0083] 4) Electrical control system

[0084] The control system integrates daytime, midday, and real-time power generation and power prediction modules for the wind and solar power generation system. The prediction modules monitor the solar irradiance, component temperature, ambient temperature, wind force, output voltage, and output current of the wind and solar power station, and make predictions based on one or more combinations of the above parameters to assist the control system in formulating operation plans and switching operation modes.

[0085] The control system includes a microcomputer processing unit, analog input channels, analog output channels, digital input channels, digital output channels, a data communication system, a human-machine interface, a historical operation database, a real-time operation database, SOE, and necessary local instruments.

[0086] In the aforementioned control system, the human-machine interface can comprehensively display images and information of the pumped storage power station and the wind and solar power station working together to transmit power. It can also display operation guidance for normal system startup, shutdown and accident conditions on the display screen with images and text, and provide relevant indicators of the current system operation status and status switching.

[0087] The control system described herein ensures high reliability by employing appropriate redundancy and self-diagnostic technologies.

[0088] The present invention adopts the above-mentioned scheme and is applied to a pumped storage power station with adjustable pumped storage units and a combined wind and solar power station power transmission system.

[0089] The present invention adopts the above-mentioned scheme and is applied to a pumped storage power station and wind and solar power station joint transmission system with hardware requirements such as pumped storage unit control system, wind turbine control system, photovoltaic power generation control system, and electrical control system. It realizes the smoothing of new energy output fluctuations, and maximizes the penetration rate of new energy while ensuring the stability of grid power and frequency. At the same time, it improves the economic benefits and grid auxiliary service capabilities of the pumped storage power station and wind and solar power station joint transmission system.

[0090] Currently, research on the combined power generation of land-based pumped storage power stations and new energy sources in my country is insufficient. The automatic power generation control method for pumped storage power stations combined with wind and solar power stations aims to fill this technological gap and provides a solution to the "curtailment" problems caused by new energy grid connection. This method innovatively uses the energy storage capacity of pumped storage power stations to compensate for the unstable output of new energy sources. It also innovatively proposes a control method that switches between three operating modes through fault detection. Furthermore, based on the comparison of tie line frequency and power frequency, wind and solar power station frequency and grid frequency, and the water level position of the pumped storage power station, eight basic control states are proposed. Based on states 5 and 6, an economic power purchase condition theory is proposed to improve the economic efficiency of the automatic power generation system. The biggest feature of this automatic power generation control method for pumped storage power stations combined with new energy sources is its full automation: the system is completely closed-loop and requires no manual intervention when all equipment is operating normally, greatly saving labor costs. Therefore, the system has extremely high stability and can maximize the penetration rate of new energy sources while ensuring stable grid power and frequency, while simultaneously improving the economic efficiency and grid auxiliary service capabilities of the combined pumped storage power station and wind and solar power station power transmission system.

[0091] The present invention also discloses a non-volatile storage medium, characterized in that the non-volatile storage medium includes a stored program, wherein the program, when running, controls the device where the non-volatile storage medium is located to execute the above-described method.

[0092] The present invention also discloses an electronic device, characterized in that it comprises a processor and a memory; the memory stores computer-readable instructions, and the processor is used to execute the computer-readable instructions, wherein the computer-readable instructions execute the method described above.

[0093] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coordinated automatic power generation control method for pumped storage and new energy power generation, characterized by: It includes multiple control cycles, and each control cycle includes the following steps: Multiple parameter data of the power system are collected, and the economic value of electricity purchase is calculated based on the collected data; the parameter data includes tie line frequency, wind and solar power output power, pumped storage unit output power, pumped storage upper reservoir water level, daily planned power generation of wind and solar power, midday planned power generation, and real-time predicted power generation operation parameters. Based on the collected data, the operating mode of the control system will be switched: Based on the collected data, the control system determines whether the equipment is faulty; if a fault is found, the operating mode is switched to "operator manual". If the equipment is running normally but the optimizer malfunctions, the operating mode will be switched to "Operator Automatic". If the equipment and optimizer are running normally, then switch the operating mode to "Coordinated Auto". The operating mode is given by the operator, and once determined, control commands are calculated and sent to the equipment. In grid-connected mode, the control system generates operational control commands; The operational control commands are transmitted to the operating equipment via wireless communication or hardwiring, completing one control cycle. In the grid-connected state, the control system generates operational control commands including the following: It operates continuously in grid-connected mode, and the control system is set with eight basic control states. Switching between control states is carried out in accordance with the principles of "failure protection" and "safety self-locking"; The control system calculates and issues control commands to the pumped storage unit equipment, photovoltaic power generation system equipment, and wind power generation system equipment based on the determined operating mode. In "Operator Manual" mode, the control commands for pumped storage units, photovoltaic power generation systems, and wind power generation systems are manually given by the operator. In "Operator Automatic" mode, the operator inputs the target control status and selects one of eight modes as the current mode based on the target control status. The system then automatically calculates and issues control commands for pumped storage units, photovoltaic power generation systems, and wind power generation systems based on the current mode. In "coordinated automatic" mode, the control status is determined and switched by the optimizer based on the currently collected system operating status, and the system automatically calculates and issues control commands for pumped storage units, photovoltaic power generation systems, and wind power generation systems.

2. The automatic power generation control method for coordinated pumped storage and new energy power generation according to claim 1, characterized in that: The control commands for the pumped storage unit equipment, photovoltaic power generation system equipment, and wind power generation system equipment are output to the sub-control systems of the pumped storage unit equipment, photovoltaic power generation system equipment, and wind power generation system equipment through communication or hard-wiring, and the control actions are completed to complete one control cycle. When the controller time reaches the next control cycle, it is ready to start the next control cycle.

3. The automatic power generation control method for coordinated pumped storage and new energy power generation according to claim 2, characterized in that: The eight target control states are as follows: The frequency of the tie line is lower than the power frequency, and the power generation of wind and solar power stations cannot meet the frequency regulation requirements. Pumped storage power stations generate power to supplement the active power required by the system and jointly output electrical energy. The frequency of the tie line is lower than the power frequency, so the wind and solar power generation cannot meet the frequency regulation requirements. However, the water level of the pumped storage power station is low and cannot generate electricity. The system only outputs electricity from the wind and solar power station. The frequency of the tie line is lower than the power frequency. The power generation of the wind and solar power station is greater than or equal to the frequency regulation requirement. The remaining active power is used for pumped storage power station pumping. The system only outputs power from the wind and solar power station. The frequency of the tie line is lower than the power frequency. The power generation of the wind and solar power station is greater than or equal to the frequency regulation requirement, but the water level of the pumped storage power station reaches a high value and cannot pump water. The system only outputs power from the wind and solar power station. The frequency of the tie line is higher than the power frequency. The power generated by the wind and solar power station is absorbed by the pumped storage power station. When the "economic power purchase conditions" are met, the pumped storage power station also needs to absorb the power from the grid to pump water. When the frequency of the tie line is higher than the power frequency and the "economic power purchase conditions" are not met, the pumped storage power station will only be supplied by wind and solar power generation and will not purchase power from the grid. Since the frequency of the tie line is higher than the power frequency, the wind and solar power stations have no active power output, and the pumped storage power stations still need to absorb electrical energy from the grid to pump water. The tie line frequency is higher than the power frequency, but the water level at the pumped storage power station has reached a high value, making it impossible to pump water, and the system does not have frequency regulation capability.

4. The automatic power generation control method for coordinated pumped storage and new energy power generation according to claim 3, characterized in that: The process of collecting multiple parameter data from the power system and calculating the economic electricity purchase value based on the collected data also includes the following: The tie line frequency is calculated using algorithms based on the periodic method, analytical method, and error minimization principle, and is read from the power plant data acquisition system; the output power of wind and solar power generation and the output power of pumped storage units are obtained from the transformers of the wind and solar power plants and pumped storage units, respectively; the real-time predicted power generation operating parameters are obtained by the combined effect of the power generation operating parameters given by the power prediction algorithm of the wind and solar power plants and the predicted power generation operating parameters of the pumped storage power plants.

5. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein the program, when executed, controls the device where the non-volatile storage medium is located to perform the method described in any one of claims 1 to 4.

6. An electronic device, characterized in that, It includes a processor and a memory; the memory stores computer-readable instructions, and the processor is configured to execute the computer-readable instructions, wherein the computer-readable instructions, when executed, perform the method according to any one of claims 1 to 4.

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