Pumped storage power station drainage method, apparatus, and storage medium

Abstract

The present disclosure provides a pumped storage power station drainage method, device and storage medium. In some embodiments of the present disclosure, internal structure parameter information of a pumped storage power station is obtained; according to the internal structure parameter information of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow and drainage head difference of each drainage stage for draining the pumped storage power station, with the minimum emergency drainage time and drainage equipment operation cost as the target; wherein the internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage performs drainage operation for each drainage space; according to the total drainage flow and drainage head difference of each drainage stage, the pumped storage power station is drained in stages according to the multiple drainage stages, which can shorten the emergency drainage time, reduce the overall operation cost of the drainage equipment in the emergency rescue drainage process, and improve the emergency disposal level of the pumped storage power station water-flooded plant accident.

Description

Technical Field

[0001] This disclosure relates to the field of energy storage power station technology, and in particular to a drainage method, equipment and storage medium for a pumped storage power station. Background Technology

[0002] If a pumped storage power station encounters an abnormal inflow of water into the underground caverns or a sudden event such as a rupture of the water intake system, generator set, or tailrace system pipeline, or valve damage during operation, the water inflow into the underground powerhouse will increase suddenly. If this exceeds the drainage capacity of the underground powerhouse drainage system, or if there are malfunctions in the drainage system's power supply or drainage equipment, it may cause a flooding accident in the powerhouse, and even result in significant losses such as equipment damage and personal injury.

[0003] In the event of a flooding incident at the power plant, the pumped-storage power station's own drainage system is generally unable to function properly, and the only solution is to utilize emergency drainage equipment located outside the power station. According to research, in the event of an extreme flooding incident at the pumped-storage power station, the total water accumulation in the underground powerhouse can reach 940,000 cubic meters. 3 The total drainage height difference can reach 130m. Currently, the mainstream large-scale emergency drainage equipment on the market generally has a flow rate of 5000m³. 3 With a flow rate of around 10 m / h and a head of around 10 m, it cannot meet the drainage requirements of such a large flow rate and high head.

[0004] Currently, pumped-storage power stations cannot drain water quickly and effectively when flooded. Therefore, an emergency drainage solution for pumped-storage power stations is urgently needed. Summary of the Invention

[0005] This disclosure provides a drainage method, equipment, and storage medium for pumped storage power stations, to at least solve the problem that existing pumped storage power stations cannot carry out rapid and effective drainage when flooded.

[0006] The technical solution disclosed herein is as follows: This disclosure provides a drainage method for a pumped storage power station, including: Obtain internal structural parameter information of pumped storage power stations; Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage is a drainage operation performed in each of the drainage spaces. Based on the total drainage flow and drainage height difference of each of the multiple drainage stages, the pumped storage power station is subjected to drainage operations in stages according to the multiple drainage stages.

[0007] Optionally, based on the internal structural parameter information of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the objective of minimizing emergency drainage time and drainage equipment operating costs. This includes: Based on the internal structural parameters of the pumped storage power station, calculate the drainage height difference for each of the multiple drainage stages of the pumped storage power station; and Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs.

[0008] Optionally, the multiple drainage stages are three. Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate for each of the multiple drainage stages, with the objective of minimizing emergency drainage time and drainage equipment operating costs. This includes: Step S1: Input the internal structural parameters of the pumped storage power station, and set the population size P and the number of iterations to terminate the multi-objective optimization algorithm. max ; Step S2: Randomly generate a specified number of chromosomes to form an initial population P(0); Step S3: Determine the decision variable as the total drainage flow rate of each of the three drainage stages, and initialize the chromosome according to the target constraints, wherein one chromosome corresponds to one drainage method; Step S4: Evolutionary generation C=1, for each chromosome of the population, calculate the objective function value of the corresponding drainage method; Step S5: Perform non-dominated sorting and crowding calculation on all individuals in the population; Step S6: Use the comparison operator to compare the quality of individuals in the same layer; in the non-dominated ranking results, the individuals in the first layer are the best, followed by the individuals in the second layer; the larger the crowding distance, the better the individual. Step S7: Select the target individuals Q(t) from the parent population P(t) quality comparison results, which represent a predetermined proportion; Step S8: Determine whether the evolution generation C is less than the preset generation. If yes, proceed to step S9. If no, output the total drainage flow rate of each of the three drainage stages corresponding to the optimization result. Step S9: Select individuals from the parent population P(t) using the binary tournament method to perform crossbreeding and mutation operations to generate the offspring population R(t); Step S10: Determine whether the generated offspring population R(t) meets the preset number. If not, return to step S9; if yes, proceed to step S11. Step S11: Merge the target individual Q(t) and the offspring population R(t) into a combined population, which will serve as the new parent population P(t+1) in the next evolutionary calculation; Step S12: Evolutionary generation C = C + 1, proceed to step S4.

[0009] Optionally, the target constraint includes the following formula: ; ; ; ; in, Rated flow rate of a single drainage truck; This refers to the total rated flow rate of the water intake pump; To check the drainage flow rate of the leaking pipe; This represents the maximum throughput of a single channel. It is a constant; ; .

[0010] Optionally, the evolutionary generation C=1, and for each chromosome of the population, the objective function value of the corresponding drainage method is calculated, including: The evolutionary generation C=1, and for each chromosome of the population, the objective function value of the corresponding drainage method is calculated according to the drainage objective function formula; wherein, the drainage objective function formula is as follows: , in, Represents the set of objective functions; For emergency drainage time targets; The target is the operating cost; Q is the total drainage flow rate, and Q is the decision variable.

[0011] Optionally, the plurality of drainage stages includes an initial power station self-drainage stage, which is used to drain the accumulated water on the top of the area above the generator layer to the opening; the step of performing drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the plurality of drainage stages includes: A diesel generator set is installed on the top of the internal structure of the pumped storage power station; a submersible pump is installed in the access tunnel to the plant, and the output end of the submersible pump is connected to the drainage pipe. The first drainage constraint condition during the initial self-drainage phase of the power plant is: , in, The remaining water volume during the initial self-drainage stage of the power station at time t; Let be the actual drainage flow rate at time t during the initial self-drainage phase of the power plant. express; The actual drainage head at time t during the initial self-drainage phase of the power plant; assuming a constant power output, the drainage flow rate is... With Yangcheng They are negatively correlated, that is ( <0, >0); the rated flow rate of the water pump is Rated head is ,but ; , This indicates the emergency drainage time during the initial self-drainage phase of the power plant. It depends on the greater of the power plant's self-draining time and the rescue team's arrival time at the scene; This indicates the initial self-drainage time of the power plant. This refers to the total water accumulation during the initial self-drainage phase of the power station. The arrival time of the rescue team is determined by the geographical location of the power station and the rescue team. , The function representing the initial operating cost is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity from a diesel engine per kilowatt of power; The rental cost per kilowatt of power required for the submersible pump.

[0012] Optionally, the plurality of drainage stages includes a mid-term multi-vehicle series drainage stage, which is used to drain the remaining undischarged water in the generator layer and the area above the generator layer to the tunnel opening; the step of performing drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the plurality of drainage stages includes: Multiple drainage vehicles are connected in series at the generator floor and the access tunnel of the pumped storage power station. The second drainage constraint for the mid-term multi-vehicle tandem drainage stage is: , This indicates the mid-term multi-vehicle series drainage stage. That is, the rated flow rate of a single drainage vehicle is in the range of 5000~15000 m³ / h; , This indicates that the drainage time for the mid-term multi-vehicle tandem drainage stage is... Water accumulation in the undrained area above the generator floor With the rated flow of the drainage truck The ratio; , The operating cost function for the mid-term multi-vehicle series drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; for Maximum drainage head, which is the height difference between the generator floor and the underground powerhouse. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity from a diesel engine per kilowatt of power; The rental cost per kilowatt of power required for the drainage truck.

[0013] Optionally, the multiple drainage stages include a later water intake, storage, and drainage stage. This later stage is used to discharge accumulated water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor to the opening. The step of performing drainage operations on the pumped storage power station in stages according to the total drainage flow rate and drainage height difference of each of the multiple drainage stages includes: A water storage tank is set up on the generator floor; a floating pump is placed below the generator floor to draw water from the busbar floor, turbine floor, spiral casing floor and bottom drainage corridor, and the water is stored in the water storage tank; multiple drainage vehicles at the generator floor and the access tunnel are connected in parallel with the maintenance leakage drainage pipes to drain water. The third drainage constraint condition for the later water intake, storage, and drainage stage is: , ; The remaining water volume in the later stage at time t; The actual drainage flow rate at time t during the later water intake, storage, and drainage phase is given by... express; The actual discharge head of the water intake pump at time t during the later water intake, storage and discharge stage; Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; , This indicates that the later water intake, storage and drainage stage added a maintenance leakage drainage channel on the basis of the drainage in the access tunnel to the plant; , This indicates that the total water intake flow rate and the total drainage flow rate are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow rate is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipe during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; , Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is the number of channels. Multiply by the maximum capacity of a single channel ; , This indicates the drainage time during the later water intake, storage, and drainage phase; The water volume during the later stages of water intake, storage, and drainage is the water volume below the generator floor of the underground powerhouse. , The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

[0014] The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

[0015] , ; The remaining water volume in the later stage at time t; The actual drainage flow rate at time t during the later water intake, storage, and drainage phase is given by... express; The actual discharge head of the water intake pump at time t during the later water intake, storage and discharge stage; Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; , This indicates that the later water intake, storage and drainage stage added a maintenance leakage drainage channel on the basis of the drainage in the access tunnel to the plant; , This indicates that the total water intake flow rate and the total drainage flow rate are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow rate is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipe during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; , Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is the number of channels. Multiply by the maximum capacity of a single channel ; , This indicates the drainage time during the later water intake, storage, and drainage phase; The water volume during the later stages of water intake, storage, and drainage is the water volume below the generator floor of the underground powerhouse. , The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

[0016] This disclosure also provides an electronic device, including: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the steps in the method described above.

[0017] This disclosure also provides a computer-readable storage medium, wherein the computer instructions are used to cause the computer to perform the steps of the above-described method.

[0018] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects: In some embodiments of this disclosure, internal structural parameter information of the pumped storage power station is obtained. Based on this information, a multi-objective optimization algorithm is used to determine the total drainage flow and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage performs drainage operations for each drainage space. By performing drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference for each of the multiple drainage stages, the emergency drainage time can be shortened, the overall operating cost of drainage equipment during emergency rescue drainage can be reduced, and the emergency response level for pumped storage power station flooding accidents can be improved.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, and are not intended to unduly limit this disclosure.

[0021] Figure 1 A schematic flowchart of a pumped storage power station drainage method provided as an exemplary embodiment of this disclosure; Figure 2 A schematic diagram illustrating the division of emergency drainage stages as an exemplary embodiment of this disclosure; Figure 3 A schematic diagram of emergency drainage of a pumped storage power station provided as an exemplary embodiment of this disclosure; Figure 4 A schematic diagram of a drainage method for the initial self-drainage stage of a power plant, provided as an exemplary embodiment of this disclosure; Figure 5A schematic diagram of a drainage method for a mid-term multi-vehicle series drainage stage provided as an exemplary embodiment of this disclosure; Figure 6 A schematic diagram of a drainage method for the later stages of water intake, storage, and drainage, provided as an exemplary embodiment of this disclosure; Figure 7 A schematic diagram of the structure of a drainage device for a pumped storage power station provided as an exemplary embodiment of this disclosure; Figure 8 A schematic diagram of the structure of an electronic device provided for an exemplary embodiment of this disclosure. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0024] It should be noted that the user information involved in this disclosure includes, but is not limited to, user device information and user personal information; the collection, storage, use, processing, transmission, provision and disclosure of user information in this disclosure all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0025] If a pumped storage power station encounters an abnormal inflow of water into the underground caverns or a sudden event such as a rupture of the water intake system, generator set, or tailrace system pipeline, or valve damage during operation, the water inflow into the underground powerhouse will increase suddenly. If this exceeds the drainage capacity of the underground powerhouse drainage system, or if there are malfunctions in the drainage system's power supply or drainage equipment, it may cause a flooding accident in the powerhouse, and even result in significant losses such as equipment damage and personal injury.

[0026] In the event of a flooding incident at the power plant, the pumped-storage power station's own seepage drainage system is generally unable to operate normally, and the only solution is to utilize emergency drainage equipment located outside the power station. According to research, in the event of an extreme flooding incident at a pumped-storage power station, the total water accumulation in the underground powerhouse can reach 940,000 cubic meters. 3The total drainage height difference can reach 130m. Currently, the mainstream large-scale emergency drainage equipment on the market generally has a flow rate of 5000m³. 3 With a flow rate of around 10 m / h and a head of around 10 m, it cannot meet the drainage requirements of such a large flow rate and high head.

[0027] Currently, pumped-storage power stations cannot drain water quickly and effectively when flooded. Therefore, an emergency drainage solution for pumped-storage power stations is urgently needed.

[0028] To address the aforementioned technical problems, in some embodiments of this disclosure, internal structural parameter information of the pumped storage power station is obtained. Based on this information, a multi-objective optimization algorithm is used to determine the total drainage flow and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage performs drainage operations for each drainage space. By performing drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference for each of the multiple drainage stages, the emergency drainage time can be shortened, the overall operating cost of drainage equipment during emergency rescue drainage can be reduced, and the emergency response level for pumped storage power station flooding accidents can be improved.

[0029] The technical solutions provided by the embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic flowchart illustrating a drainage method for a pumped storage power station, provided as an exemplary embodiment of this disclosure. Figure 1 As shown, the method includes: S101: Obtain internal structural parameter information of the pumped storage power station; S102: Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to the spatial layout, and each drainage stage performs drainage operations for each drainage space. S103: Based on the total drainage flow and drainage height difference of each of the multiple drainage stages, the pumped storage power station is drained in stages according to the multiple drainage stages.

[0031] In this embodiment, the entity executing the above method can be a terminal device or a server.

[0032] When the executing entity is a terminal device, the specific implementation form of the terminal device is not limited. Terminal devices include, but are not limited to, any of the following: personal computers, tablet computers, smartphones, and smart wearable devices.

[0033] When the executing entity is a server, such as a conventional server, cloud server, cloud host, virtual center, or other server equipment, the server's components mainly include a processor, hard drive, memory, system bus, and common computer architecture types.

[0034] In this embodiment, the internal structural parameters of the pumped storage power station include, but are not limited to, the following: the excavation dimensions, average longitudinal slope, and elevation of the main and auxiliary powerhouses, main transformer tunnel, busbar tunnel, tailgate chamber, access tunnel, ventilation and safety tunnel, drainage corridor, and other tunnels of the pumped storage power station.

[0035] Figure 2 This is a schematic diagram illustrating the division of emergency drainage stages as an exemplary embodiment of this disclosure. Figure 2 As shown, for accident scenarios where the underground powerhouse of various pumped storage power stations is completely submerged, the emergency drainage process is divided into three stages according to the order of emergency drainage and the actual characteristics of each layer of drainage: the initial stage of power station self-drainage, the intermediate stage of multi-vehicle series drainage, and the later stage of water intake, storage and drainage. Targeted emergency drainage methods are proposed according to the drainage characteristics of each stage.

[0036] The objective function for emergency drainage is:

[0037] Wherein, formula (1) represents the objective function set; For emergency drainage time targets; The target is operating cost; the drainage flow rate Q is the decision variable.

[0038] Formula (2) represents the objective function for emergency drainage time, which is the initial self-drainage time of the power plant. Mid-term multi-vehicle series drainage Later stages include "water intake + water storage + drainage". The sum of the drainage times in the three stages.

[0039] Formula (3) represents the operating cost function, which includes the cost of diesel generators and equipment rental fees required for the normal operation of the drainage equipment. , , These are the operating costs in the early, middle, and late stages, respectively.

[0040] In some embodiments of this disclosure, based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. One possible approach is to calculate the drainage height difference for each of the multiple drainage stages of the pumped storage power station based on its internal structural parameters; and to determine the total drainage flow rate for each of the multiple drainage stages of the pumped storage power station based on its internal structural parameters using a multi-objective optimization algorithm, with the goal of minimizing emergency drainage time and drainage equipment operating costs.

[0041] In some embodiments of this disclosure, based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate for each of the multiple drainage stages of the pumped storage power station, with the objective of minimizing emergency drainage time and drainage equipment operating costs. This includes the following steps: Step S1: Input the internal structural parameters of the pumped storage power station, and set the population size P and the number of iterations to terminate the multi-objective optimization algorithm. max ; Step S2: Randomly generate a specified number of chromosomes to form an initial population P(0); Step S3: Determine the decision variable as the total drainage flow rate of each of the three drainage stages, and initialize the chromosome according to the target constraints, wherein one chromosome corresponds to one drainage method; Step S4: Evolutionary generation C=1, for each chromosome in the population, calculate the objective function value of the corresponding drainage method; Step S5: Perform non-dominated sorting and crowding calculation on all individuals in the population; Step S6: Use the comparison operator to compare the quality of individuals in the same layer; in the non-dominated ranking results, the individuals in the first layer are the best, followed by the individuals in the second layer; the larger the crowding distance, the better the individual. Step S7: Select a predetermined proportion of target individuals Q(t) from the parent population P(t) quality comparison results; the predetermined proportion can be 50%. Step S8: Determine whether the evolution generation C is less than the preset generation. If yes, proceed to step S9. If no, output the total drainage flow of each of the three drainage stages corresponding to the optimization result. Step S9: Select individuals from the parent population P(t) using the binary tournament method to perform crossbreeding and mutation operations to generate the offspring population R(t); Step S10: Determine whether the generated offspring population R(t) meets the preset number. If not, return to step S9; if yes, proceed to step S11. Step S11: Merge the target individual Q(t) and the offspring population R(t) into a combined population, which will serve as the new parent population P(t+1) in the next evolutionary calculation; Step S12: Evolutionary generation C = C + 1, proceed to step S4.

[0042] In the above embodiments, the target constraint conditions include the following formula: ; ; ; ; in, Rated flow rate of a single drainage truck; This refers to the total rated flow rate of the water intake pump; To check the drainage flow rate of the leaking pipe; This represents the maximum throughput of a single channel. It is a constant; ; .

[0043] In the above embodiment, the number of generations C=1, and for each chromosome of the population, the objective function value of the corresponding drainage method is calculated, including: With an evolutionary generation C=1, for each chromosome in the population, calculate the objective function value of the corresponding drainage method according to the drainage objective function formula; the drainage objective function formula is as follows: , in, Represents the set of objective functions; For emergency drainage time targets; The target is the operating cost; Q is the total drainage flow rate, and Q is the decision variable.

[0044] In some embodiments of this disclosure, the pumped storage power station is subjected to drainage operations in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages. Figure 3 This is a schematic diagram of emergency drainage in a pumped storage power station, provided as an exemplary embodiment of this disclosure. The drainage methods for each drainage stage are described below.

[0045] Figure 4 This diagram illustrates a drainage method during the initial self-drainage stage of a power plant, as provided as an exemplary embodiment of this disclosure. Figure 4 As shown, the initial self-drainage stage of the power station is used to drain the water accumulated on the top of the area above the generator floor to the tunnel entrance. Diesel generator sets are installed on the top of the internal structure of the pumped storage power station; submersible pumps are installed inside the access tunnel, with the output end of the submersible pumps connected to the drainage pipes. The first drainage constraint condition during the initial self-drainage phase of the power plant is: , The above formula takes into account that during the initial drainage process, the actual pump head will change from low to high, and the drainage flow rate will decrease accordingly. Among these factors, This represents the remaining water volume accumulated during the initial self-drainage phase of the power station at time t. The actual drainage flow rate at time t during the initial self-drainage phase of the power plant is given by... express; This represents the actual discharge head at time t during the initial self-drainage phase of the power plant; assuming a constant power output, the discharge flow rate is... With Yangcheng They are negatively correlated, that is ( <0, >0); the rated flow rate of the water pump is Rated head is ,but ; , The above formula represents the emergency drainage time during the initial self-drainage phase of the power plant. It depends on the greater of the power plant's self-draining time and the rescue team's arrival time at the scene; This indicates the initial self-drainage time of the power plant. This represents the total water volume accumulated during the initial self-drainage phase of the power station. The arrival time of the rescue team is determined by the geographical location of the power station and the rescue team. , The above formula represents the initial operating cost function, which is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the pump efficiency, typically taken as 0.6 to 0.85. This represents the transmission efficiency of the diesel engine, taken as 0.95; 367 is a fixed value. The cost of generating electricity from a diesel engine per kilowatt of power is [amount in yuan]. The rental cost per kilowatt of submersible pump power is assumed to be for initial drainage. Yuan / KW.

[0046] Figure 5 This is a schematic diagram of a drainage method for a mid-term multi-vehicle tandem drainage stage, provided as an exemplary embodiment of this disclosure. (See diagram for reference.) Figure 5 As shown, the mid-term multi-vehicle series drainage stage is used to drain the remaining undischarged water in the generator layer and the area above the generator layer to the tunnel entrance. Multiple drainage vehicles are connected in series at the generator layer and the access tunnel of the pumped storage power station; The second drainage constraint for the mid-term multi-vehicle tandem drainage stage is: , Indicates the mid-term multi-vehicle series drainage stage That is, the rated flow rate of a single drainage vehicle is in the range of 5000~15000 m³ / h; , This indicates the drainage time during the mid-term multi-vehicle tandem drainage phase. Water accumulation in the undrained area above the generator floor With the rated flow of the drainage truck The ratio; , The operating cost function for the mid-term multi-vehicle series drainage phase is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. The maximum drainage head during the mid-term multi-vehicle series drainage phase is the height difference above the generator floor of the underground powerhouse. This indicates the pump efficiency, typically taken as 0.6 to 0.85. This represents the transmission efficiency of the diesel engine, taken as 0.95; 367 is a fixed value. The cost of generating electricity from a diesel engine per kilowatt of power is [amount in yuan]. The rental cost per kilowatt of drainage truck is given. For medium-term drainage, high-flow drainage trucks will be used. (Assuming...) Yuan / KW.

[0047] Figure 6 This diagram illustrates a drainage method for the later stages of water intake, storage, and drainage, as provided in an exemplary embodiment of this disclosure. Figure 6 As shown, the later water intake, storage, and drainage stages are used to drain accumulated water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor to the tunnel entrance. In the later drainage stage, a comprehensive drainage method combining "water intake + storage + drainage" is employed to drain accumulated water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor. For example... Figure 4As shown, based on the actual conditions such as the site environment and drainage height difference below the generator floor, floating pumps are used to draw water from each layer and discharge the accumulated water to the generator floor. At the generator floor, a reservoir is set up to temporarily store the water drawn by the floating pumps. Then, drainage is carried out in parallel through a multi-vehicle series drainage system in the access tunnel and the maintenance leakage drainage pipes (powered by trailer-mounted self-priming pumps). The multi-vehicle series drainage system in the access tunnel still uses the mid-term drainage equipment. In addition, water intake vehicles equipped with floating pumps are added for water intake from areas below the generator floor; trailer-mounted self-priming pumps are added for drainage from the maintenance leakage drainage pipes. A reservoir is set up at the generator floor; floating pumps are placed below the generator floor to draw water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor, and the water is stored in the reservoir; drainage is carried out in parallel through multiple drainage vehicles at the generator floor and the access tunnel and the maintenance leakage drainage pipes. The third drainage constraint condition in the later stages of water intake, storage, and drainage is: , The changes in drainage flow caused by the gradual increase in the actual head of the water intake pump during the later drainage process were taken into account. ; The remaining water volume in the later stage at time t; The actual drainage flow rate at time t during the later stages of water intake, storage, and drainage is represented by... express; This refers to the actual discharge head of the water intake pump at time t during the later stages of water intake, storage, and drainage. Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; , This indicates that during the later stages of water intake, storage, and drainage, a maintenance and leakage drainage channel was added to the existing drainage system in the access tunnel. , This indicates that the total water intake and total drainage flow are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipe during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; , Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is the number of channels. Multiply by the maximum capacity of a single channel ; , This indicates the drainage time during the later stages of water intake, storage, and drainage. This refers to the water accumulation during the later stages of water intake, storage, and drainage, specifically the water accumulation below the generator floor of the underground powerhouse. , The function representing the operating cost of the later stages of water intake, storage, and drainage is the sum of the diesel generator costs and equipment rental costs required for the normal operation of the drainage equipment. This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; Assuming a water truck Yuan / KW, trailer pump Yuan / KW.

[0048] In summary, the multi-objective optimization model for the emergency drainage scheme of pumped storage power stations is as follows:

[0049] Figure 7 This is a schematic diagram of the structure of a drainage device 70 for a pumped storage power station, provided as an exemplary embodiment of this disclosure. Figure 7 As shown, the drainage device 70 of the pumped storage power station includes: an acquisition module 71, a determination module 72, and a drainage module 73.

[0050] Among them, the acquisition module 71 is used to acquire the internal structural parameter information of the pumped storage power station; The determination module 72 is used to determine the total drainage flow and drainage height difference of each of the multiple drainage stages of the pumped storage power station based on the internal structural parameter information of the pumped storage power station and using a multi-objective optimization algorithm with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to the spatial arrangement, and each drainage stage performs drainage operations for each drainage space. The drainage module 73 is used to perform drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages.

[0051] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0052] Optionally, when determining the total drainage flow rate and drainage height difference for each of the multiple drainage stages of the pumped storage power station based on the internal structural parameter information of the pumped storage power station and using a multi-objective optimization algorithm with the objective of minimizing emergency drainage time and drainage equipment operating costs, the determining module 72 is used for: Based on the internal structural parameters of the pumped storage power station, calculate the drainage height differences for each of the multiple drainage stages; and Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs.

[0053] Optionally, there are three drainage stages. When determining the total drainage flow rate for each of the multiple drainage stages of the pumped storage power station based on the internal structural parameter information of the pumped storage power station and using a multi-objective optimization algorithm with the objective of minimizing emergency drainage time and drainage equipment operating costs, module 72 is used for: Step S1: Input the internal structural parameters of the pumped storage power station, and set the population size P and the number of iterations to terminate the multi-objective optimization algorithm. max ; Step S2: Randomly generate a specified number of chromosomes to form an initial population P(0); Step S3: Determine the decision variable as the total drainage flow rate of each of the three drainage stages, and initialize the chromosome according to the target constraints, wherein one chromosome corresponds to one drainage method; Step S4: Evolutionary generation C=1, for each chromosome in the population, calculate the objective function value of the corresponding drainage method; Step S5: Perform non-dominated sorting and crowding calculation on all individuals in the population; Step S6: Use the comparison operator to compare the quality of individuals in the same layer; in the non-dominated ranking results, the individuals in the first layer are the best, followed by the individuals in the second layer; the larger the crowding distance, the better the individual. Step S7: Select the target individuals Q(t) from the parent population P(t) quality comparison results, which represent a predetermined proportion; Step S8: Determine whether the evolution generation C is less than the preset generation. If yes, proceed to step S9. If no, output the total drainage flow of each of the three drainage stages corresponding to the optimization result. Step S9: Select individuals from the parent population P(t) using the binary tournament method to perform crossbreeding and mutation operations to generate the offspring population R(t); Step S10: Determine whether the generated offspring population R(t) meets the preset number. If not, return to step S9; if yes, proceed to step S11. Step S11: Merge the target individual Q(t) and the offspring population R(t) into a combined population, which will serve as the new parent population P(t+1) in the next evolutionary calculation; Step S12: Evolutionary generation C = C + 1, proceed to step S4.

[0054] Optionally, the target constraints include the following formula: ; ; ; ; in, Rated flow rate of a single drainage truck; This refers to the total rated flow rate of the water intake pump; To check the drainage flow rate of the leaking pipe; This represents the maximum throughput of a single channel. It is a constant; , .

[0055] Optionally, with generation C=1, calculate the objective function value for each chromosome in the population, including: With an evolutionary generation C=1, for each chromosome in the population, calculate the objective function value of the corresponding drainage method according to the drainage objective function formula; the drainage objective function formula is as follows: , in, Represents the set of objective functions. For emergency drainage time targets, The target is the operating cost, Q is the total drainage flow, and Q is the decision variable.

[0056] Optionally, the multiple drainage stages include an initial power station self-drainage stage, which is used to drain the accumulated water on the top of the area above the generator layer to the opening; when the drainage module 73 performs drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages, it is used for: A diesel generator set is installed on the top of the internal structure of the pumped storage power station; a submersible pump is installed in the access tunnel to the plant, and the output end of the submersible pump is connected to the drainage pipe. The first drainage constraint condition during the initial self-drainage phase of the power plant is: , in, This represents the remaining water volume accumulated during the initial self-drainage phase of the power station at time t. The actual drainage flow rate at time t during the initial self-drainage phase of the power plant is given by... express; This represents the actual discharge head at time t during the initial self-drainage phase of the power plant; assuming a constant power output, the discharge flow rate is... With Yangcheng They are negatively correlated, that is ( <0, >0); the rated flow rate of the water pump is Rated head is ,but ; , Indicates the emergency drainage time during the initial self-drainage phase of the power plant. It depends on the greater of the power plant's self-draining time and the rescue team's arrival time at the scene; This indicates the initial self-drainage time of the power plant. This represents the total water volume accumulated during the initial self-drainage phase of the power station. The arrival time of the rescue team is determined by the geographical location of the power station and the rescue team. , The function representing the initial operating cost is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity from a diesel engine per kilowatt of power; The rental cost per kilowatt of power required for the submersible pump.

[0057] Optionally, the multiple drainage stages include a mid-term multi-vehicle series drainage stage, which is used to drain the remaining undischarged water in the generator layer and the area above the generator layer to the tunnel opening; when the drainage module 73 performs drainage operations on the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages, it is used for: Multiple drainage vehicles are connected in series at the generator floor and the access tunnel of the pumped storage power station; The second drainage constraint for the mid-term multi-vehicle tandem drainage stage is: , Indicates the mid-term multi-vehicle series drainage stage That is, the rated flow rate of a single drainage vehicle is in the range of 5000~15000 m³ / h; , This indicates the drainage time during the mid-term multi-vehicle tandem drainage phase. Water accumulation in the undrained area above the generator floor With the rated flow of the drainage truck The ratio; , The operating cost function for the mid-term multi-vehicle series drainage phase is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. The maximum drainage head during the mid-term multi-vehicle series drainage phase is the height difference above the generator floor of the underground powerhouse. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity from a diesel engine per kilowatt of power; The rental cost per kilowatt of power required for the drainage truck.

[0058] Optionally, the multiple drainage stages include a later water intake, storage, and drainage stage. This later stage is used to drain accumulated water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor to the opening. The drainage module 73 performs drainage operations on the pumped-storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages, including: A water storage tank is set up on the generator floor; a floating pump is placed below the generator floor to draw water from the busbar floor, turbine floor, spiral casing floor and bottom drainage corridor, and the water is stored in the water storage tank; multiple drainage vehicles at the generator floor and the access tunnel are connected in parallel with the maintenance leakage drainage pipes to drain water. The third drainage constraint condition in the later stages of water intake, storage, and drainage is: , ; The remaining water volume in the later stage at time t; The actual drainage flow rate at time t during the later water intake, storage, and drainage phase is given by... express; The actual discharge head of the water intake pump at time t during the later water intake, storage and discharge stage; Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; , This indicates that the later water intake, storage and drainage stage added a maintenance leakage drainage channel on the basis of the drainage in the access tunnel to the plant; , This indicates that the total water intake flow rate and the total drainage flow rate are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow rate is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipe during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; , Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is the number of channels. Multiply by the maximum capacity of a single channel ; , This indicates the drainage time during the later water intake, storage, and drainage phase; The water volume during the later stages of water intake, storage, and drainage is the water volume below the generator floor of the underground powerhouse. , The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

[0059] The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

[0060] Figure 8 This is a schematic diagram of the structure of an electronic device provided as an exemplary embodiment of this disclosure. For example... Figure 8 As shown, the electronic device includes a memory 81 and a processor 82. Additionally, the electronic device also includes a power supply component 83 and a communication component 84.

[0061] Memory 81 is used to store computer programs and can be configured to store various other data to support operation on the electronic device. Examples of this data include instructions for any application or method used to operate on the electronic device.

[0062] The memory 81 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0063] Communication component 84 is used for data transmission with other devices.

[0064] The processor 82 executes computer instructions stored in the memory 81 to: acquire internal structural parameter information of the pumped storage power station; based on the internal structural parameter information of the pumped storage power station, use a multi-objective optimization algorithm to determine the total drainage flow and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs; wherein the internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage performs drainage operations for each drainage space; based on the total drainage flow and drainage height difference of each of the multiple drainage stages, the pumped storage power station is drained in stages according to the multiple drainage stages.

[0065] Accordingly, embodiments of this disclosure also provide a computer-readable storage medium storing a computer program. When the computer-readable storage medium stores a computer program, and the computer program is executed by one or more processors, it causes one or more processors to perform... Figure 1 Each step in the method embodiment.

[0066] Accordingly, embodiments of this disclosure also provide a computer program product, which includes a computer program / instructions that are executed by a processor. Figure 1 Each step in the method embodiment.

[0067] The above Figure 8The communication component is configured to facilitate wired or wireless communication between the device containing the communication component and other devices. The device containing the communication component can access wireless networks based on communication standards, such as WiFi, 2G, 3G, 4G / LTE, 5G, or combinations thereof. In one exemplary embodiment, the communication component receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA) technology, Ultra-Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0068] The above Figure 8 The power supply component provides power to the various components of the device in which it resides. The power supply component may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the device in which it resides.

[0069] The above Figure 8 The display includes a screen, which may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors can sense not only the boundaries of touch or swipe actions, but also the duration and pressure associated with the touch or swipe operation.

[0070] The aforementioned electronic devices also include audio components.

[0071] An audio component may be configured to output and / or input audio signals. For example, the audio component includes a microphone (MIC) configured to receive external audio signals when the device containing the audio component is in an operating mode, such as call mode, recording mode, or voice recognition mode. The received audio signals may be further stored in memory or transmitted via a communication component. In some embodiments, the audio component also includes a speaker for outputting audio signals.

[0072] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0073] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0074] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0075] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0076] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0077] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0078] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0079] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0080] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drainage method for a pumped storage power station, characterized in that, include: Obtain internal structural parameter information of pumped storage power stations; Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate and drainage height difference for each of the multiple drainage stages of the pumped storage power station, with the goal of minimizing emergency drainage time and drainage equipment operating costs. The internal structure of the pumped storage power station is divided into multiple drainage spaces according to spatial arrangement, and each drainage stage involves drainage operations in each of these drainage spaces. This includes: Based on the internal structural parameters of the pumped storage power station, calculate the drainage height difference for each of the multiple drainage stages of the pumped storage power station; and Based on the internal structural parameters of the pumped storage power station, a multi-objective optimization algorithm is used to determine the total drainage flow rate for each of the three drainage stages of the pumped storage power station, with the objectives of minimizing emergency drainage time and drainage equipment operating costs. This includes: Step S1: Input the internal structural parameters of the pumped storage power station, and set the population size P and the number of iterations to terminate the multi-objective optimization algorithm. max ; Step S2: Randomly generate a specified number of chromosomes to form an initial population P(0); Step S3: Determine the decision variable as the total drainage flow rate of each of the three drainage stages, and initialize the chromosome according to the target constraints, wherein one chromosome corresponds to one drainage method; Step S4: Evolutionary generation C=1, for each chromosome of the population, calculate the objective function value of the corresponding drainage method; Step S5: Perform non-dominated sorting and crowding calculation on all individuals in the population; Step S6: Use the comparison operator to compare the quality of individuals in the same layer; in the non-dominated ranking results, the individuals in the first layer are the best, followed by the individuals in the second layer; the larger the crowding distance, the better the individual. Step S7: Select the target individuals Q(t) from the parent population P(t) quality comparison results, which represent a predetermined proportion; Step S8: Determine whether the evolution generation C is less than the preset generation. If yes, proceed to step S9. If no, output the total drainage flow rate of each of the three drainage stages corresponding to the optimization result. Step S9: Select individuals from the parent population P(t) using the binary tournament method to perform crossbreeding and mutation operations to generate the offspring population R(t); Step S10: Determine whether the generated offspring population R(t) meets the preset number. If not, return to step S9; if yes, proceed to step S11. Step S11: Merge the target individual Q(t) and the offspring population R(t) into a combined population, which will serve as the new parent population P(t+1) in the next evolutionary calculation; Step S12: Evolutionary generation C = C + 1, proceed to step S4; The target constraint conditions include the following formula: ； ； ； ； in, Rated flow rate of a single drainage truck; This refers to the total rated flow rate of the water intake pump; To check the drainage flow rate of the leaking pipe; This represents the maximum throughput of a single channel. It is a constant; ; ; Based on the total drainage flow and drainage height difference of each of the multiple drainage stages, the pumped storage power station is subjected to drainage operations in stages according to the multiple drainage stages.

2. The method according to claim 1, characterized in that, The evolutionary generation C=1, and for each chromosome of the population, the objective function value of the corresponding drainage method is calculated, including: The evolutionary generation C=1, and for each chromosome of the population, the objective function value of the corresponding drainage method is calculated according to the drainage objective function formula; wherein, the drainage objective function formula is as follows: ， in, Represents the set of objective functions; The target time for emergency drainage; The target is the operating cost; Q is the total drainage flow rate, and Q is the decision variable.

3. The method according to claim 1, characterized in that, The multiple drainage stages include an initial power station self-drainage stage, which is used to drain the accumulated water on the top of the area above the generator layer to the opening; the drainage operation of the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages includes: A diesel generator set is installed on the top of the internal structure of the pumped storage power station; a submersible pump is installed in the access tunnel to the plant, and the output end of the submersible pump is connected to the drainage pipe. The first drainage constraint condition during the initial self-drainage phase of the power plant is: ， in, The remaining water volume during the initial self-drainage phase of the power station at time t; Let be the actual drainage flow rate at time t during the initial self-drainage phase of the power plant. express; The actual drainage head at time t during the initial self-drainage phase of the power plant; assuming a constant power output, the drainage flow rate is... With Yangcheng They are negatively correlated, that is ( <0, >0); the rated flow rate of the water pump is Rated head is ,but ; ， This indicates the emergency drainage time during the initial self-drainage phase of the power plant. It depends on the greater of the power plant's self-draining time and the rescue team's arrival time at the scene; This indicates the initial self-draining time of the power plant. This refers to the total water accumulation during the initial self-drainage phase of the power station. The arrival time of the rescue team is determined by the geographical location of the power station and the rescue team. ， The function representing the initial operating cost is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity per kilowatt of diesel engine power; The rental cost per kilowatt of power required for the submersible pump.

4. The method according to claim 1, characterized in that, The multiple drainage stages include a mid-term multi-vehicle series drainage stage, which is used to drain the remaining undischarged water in the generator layer and the area above the generator layer to the tunnel opening; the drainage operation of the pumped storage power station in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages includes: Multiple drainage vehicles are connected in series at the generator floor and the access tunnel of the pumped storage power station. The second drainage constraint for the mid-term multi-vehicle tandem drainage stage is: ， This indicates the mid-term multi-vehicle series drainage stage. That is, the rated flow rate of a single drainage truck is in the range of 5000~15000 m³ / h; ， This indicates that the drainage time for the mid-term multi-vehicle tandem drainage stage is... Water accumulation in the undrained area above the generator floor With the rated flow of the drainage truck The ratio; ， The operating cost function for the mid-term multi-vehicle series drainage stage is the sum of the diesel generator cost and equipment rental cost required for the normal operation of the drainage equipment. The maximum drainage head during the mid-term multi-vehicle series drainage stage is the height difference above the generator floor of the underground powerhouse. Indicates pump efficiency; Indicates the transmission efficiency of a diesel engine; The cost of generating electricity per kilowatt of diesel engine power; The rental cost per kilowatt of power required for the drainage truck.

5. The method according to claim 1, characterized in that, The multiple drainage stages include a later water intake, storage, and drainage stage. This later stage is used to discharge accumulated water from the busbar layer, turbine layer, spiral casing layer, and bottom drainage corridor to the opening. The pumped storage power station is subjected to drainage operations in stages according to the total drainage flow and drainage height difference of each of the multiple drainage stages, including: A water storage tank is set up on the generator floor; a floating pump is placed below the generator floor to draw water from the busbar floor, turbine floor, spiral casing floor and bottom drainage corridor, and the water is stored in the water storage tank; multiple drainage vehicles at the generator floor and the access tunnel are connected in parallel with the maintenance leakage drainage pipes to drain water. The third drainage constraint condition for the later water intake, storage, and drainage stage is: ， ; This represents the remaining water accumulation in the later stages at time t. The actual drainage flow rate at time t during the later water intake, storage, and drainage phase is given by... express; The actual discharge head of the water intake pump at time t during the later water intake, storage and discharge stage; Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; ， This indicates that the later water intake, storage and drainage stage added a maintenance leakage drainage channel on the basis of the drainage in the access tunnel to the plant; ， This indicates that the total water intake flow rate and the total drainage flow rate are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow rate is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipes during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; ， Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is equal to the number of channels. Multiply by the maximum capacity of a single channel ; ， This indicates the drainage time during the later water intake, storage, and drainage phase; The water volume during the later stages of water intake, storage, and drainage is the water volume below the generator floor of the underground powerhouse. ， The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; ; The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; ; ， ; This represents the remaining water accumulation in the later stages at time t. The actual drainage flow rate at time t during the later water intake, storage, and drainage phase is given by... express; The actual discharge head of the water intake pump at time t during the later water intake, storage and discharge stage; Assuming a constant power output, the drainage flow rate With Yangcheng They are negatively correlated, that is ( <0, >0); the total rated flow rate of the water pump is Rated head is ,but ; ， This indicates that the later water intake, storage and drainage stage added a maintenance leakage drainage channel on the basis of the drainage in the access tunnel to the plant; ， This indicates that the total water intake flow rate and the total drainage flow rate are balanced during the later stages of water intake, storage, and drainage; the maximum water intake flow rate is... The total drainage flow is the drainage flow from the access tunnel to the plant. With the drainage flow rate of the leaking pipes during maintenance The sum of these should be greater than the maximum water intake flow rate, i.e. ; ， Indicates the drainage flow rate of the leaking pipe during maintenance. It should be less than the drainage capacity of the leakage drainage channel during maintenance, which is equal to the number of channels. Multiply by the maximum capacity of a single channel ; ， This indicates the drainage time during the later water intake, storage, and drainage phase; The water volume during the later stages of water intake, storage, and drainage is the water volume below the generator floor of the underground powerhouse. ， The operating cost function for the later water intake, storage and drainage stage is the sum of the diesel power generation cost and equipment rental cost required for the normal operation of the drainage equipment; This indicates the operating cost of the water truck; To reduce the operating costs of the series drainage vehicles; The cost of operating the trailer pump for overhauling the leaking drainage channel; among which, This indicates the rental cost per kilowatt of power required for the water truck; .

6. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the steps of the method as described in any one of claims 1-5.

7. A computer-readable storage medium, characterized in that, Computer instructions are used to cause the computer to perform each step of the method according to any one of claims 1-5.

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