Method for first starting pumped storage power station unit after flood peak and related equipment

Abstract

The application provides a method for first starting of pumped storage power station unit after flood peak and related equipment, and the method for first starting of pumped storage power station unit after flood peak is applied to a unit control system, and comprises the following steps: starting part auxiliary system in the unit control system; switching unit working condition of the unit control system to power generation working condition, and performing unit no-load flushing; after flushing for a preset time, starting a water pump of a technical water supply system and a booster pump of a main shaft sealing water supply system in the auxiliary system, and closing a drain valve of a transformer no-load cooling system; when all the auxiliary systems are in normal operation and the technical water supply flow meets the working flow, the first starting of the unit is completed. The method for first starting of pumped storage power station unit after flood peak and related equipment are simple and convenient, can quickly and effectively restore stable operation of the unit, and avoid equipment blockage or damage.

Description

Technical Field

[0001] This application relates to the field of pumped storage power station control technology, and in particular to a method and related equipment for the first start-up of a pumped storage power station unit after a flood peak. Background Technology

[0002] Pumped storage hydroelectric power utilizes electricity generated during periods of low electricity demand to pump water into an upper reservoir. During periods of high electricity demand, the water stored in the upper reservoir is released into a lower reservoir to generate electricity. It is also known as energy storage power generation. It can convert excess electricity during periods of low grid load into high-value electricity during periods of high grid load. It is suitable for frequency and phase regulation, can be used to stabilize the frequency and voltage of the power system, is suitable for emergency backup, and can also improve the efficiency of thermal power plants and nuclear power plants in the power system.

[0003] The stable operation of pumped storage power stations is crucial to the power industry. However, long-term operation of pumped storage power stations has revealed that restarting the units after the flood peak can cause severe blockages and equipment damage, preventing the units from operating normally. Therefore, there is an urgent need for a method to quickly restore the stable operation of pumped storage power station units after the flood peak. Summary of the Invention

[0004] In view of this, the purpose of this application is to propose a method and related equipment for the first start-up of pumped storage power station units after a flood peak to solve the related problems mentioned in the background art.

[0005] The first aspect of this application provides a method for the initial startup of a pumped storage power station unit after a flood peak, applied to the unit control system, comprising: activating some auxiliary systems in the unit control system; switching the unit operating mode of the unit control system to the power generation mode and performing no-load flushing of the unit; after flushing for a preset time, activating the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary systems, and closing the drain valve of the transformer no-load cooling system; when all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate, the initial startup of the unit is completed.

[0006] Furthermore, activating a portion of the auxiliary systems in the unit control system includes: activating the hydraulic control system, water-guided bearing cooling system, high-pressure oil injection system, and oil mist separation system in the auxiliary systems, and energizing the solenoid valve of the governor emergency stop system in the auxiliary systems.

[0007] Furthermore, the step of activating a portion of the auxiliary systems in the unit control system includes: shutting down the wind tunnel heater in the auxiliary systems; controlling the mechanical braking system in the auxiliary systems to engage and then disengage; and controlling the guide vane hydraulic locking system in the auxiliary systems to disengage.

[0008] Furthermore, switching the unit operating mode of the unit control system to the power generation mode includes: controlling the commutator in the unit control system to power generation mode; controlling the excitation system in the unit control system to power generation mode; and opening the water inlet valve in the unit control system.

[0009] Furthermore, the step of performing no-load flushing of the unit includes: when the opening degree of the water inlet valve is greater than or equal to the preset opening degree, controlling the speed regulation system in the unit control system to power generation mode to perform no-load flushing of the unit.

[0010] Furthermore, the step of performing no-load flushing of the unit includes: when the speed measuring device of the speed control system is operating normally and the guide vane speed of the unit is greater than or equal to the preset speed, then the high-pressure oil injection system is shut down and the excitation system is turned on.

[0011] Furthermore, the completion of the first start-up of the unit includes: when the terminal voltage of the unit is greater than or equal to the preset voltage, the first start-up of the unit is completed.

[0012] Furthermore, the preset time is 300s, the preset opening degree is 40%, the preset speed is 95% of the rated speed, and the preset voltage is 85% of the rated voltage.

[0013] A second aspect of this application provides a device for the initial startup of a pumped storage power station unit after a flood peak, comprising: a first startup module configured to activate some auxiliary systems in the unit control system; a mode switching module configured to switch the unit operating mode of the unit control system to the power generation operating mode and perform no-load flushing of the unit; a second startup module configured to, after a preset flushing time, activate the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary systems, and close the drain valve of the transformer no-load cooling system; and a startup judgment module configured to complete the initial startup of the unit when all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate.

[0014] A third aspect of this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for the first start-up of a pumped storage power station unit after a flood peak as described in the first aspect above.

[0015] A fourth aspect of this application provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for the first start-up of a pumped-storage power station unit after a flood peak as described in the first aspect above.

[0016] A fifth aspect of this application provides a computer program product, including computer program instructions, characterized in that, when the computer program instructions are run on a computer, the computer causes the computer to execute the method for the first start-up of a pumped storage power station unit after a flood peak as described in the first aspect above.

[0017] As described above, this application provides a method and related equipment for the initial startup of a pumped-storage power station unit after a flood peak. The startup method includes activating some auxiliary systems in the unit control system; switching the unit operating mode of the unit control system to the power generation mode and performing no-load flushing of the unit; after a preset flushing time, activating the water pumps of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary systems, and closing the drain valve of the transformer no-load cooling system; when all auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate, the initial startup of the unit is completed. By starting the auxiliary systems in batches, the tailrace pipe of the unit can be flushed first, removing silt from the inlet and outlet, reducing the impact on the technical water supply and the main shaft seal. Testing shows that this method allows the unit to start successfully on the first attempt and connect to the grid as quickly as possible, without changing the pipeline connection method. The safe and stable operation of the unit can be ensured simply by changing the startup method, and the cost is low. The method and equipment for the first start-up of pumped storage power station units after the flood peak are simple and convenient, and can quickly and effectively restore the stable operation of the units, avoiding equipment blockage or damage. Attached Figure Description

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

[0019] Figure 1 This is a schematic diagram illustrating the execution logic of the unit startup method in related technologies;

[0020] Figure 2 This is a schematic diagram of the modular structure of the unit's control system;

[0021] Figure 3 This is a schematic diagram of the piping connections for the unit's control system.

[0022] Figure 4 This is a flowchart illustrating a method for the first start-up of a pumped storage power station unit after a flood peak, as described in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the execution logic of a method for the first start-up of a pumped storage power station unit after a flood peak, as described in an embodiment of this application.

[0024] Figure 6 This is a schematic diagram of the structure of a pumped storage power station unit's first start-up device after a flood peak, as described in an embodiment of this application.

[0025] Figure 7 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0028] Pumped storage hydroelectric power utilizes electricity generated during periods of low electricity demand to pump water into an upper reservoir. During periods of high electricity demand, the water stored in the upper reservoir is released into a lower reservoir to generate electricity. It is also known as energy storage power generation. It can convert excess electricity during periods of low grid load into high-value electricity during periods of high grid load. It is suitable for frequency and phase regulation, can be used to stabilize the frequency and voltage of the power system, is suitable for emergency backup, and can also improve the efficiency of thermal power plants and nuclear power plants in the power system.

[0029] The stable operation of pumped storage power stations is crucial to the power industry. However, long-term operation of pumped storage power stations has revealed that restarting the units after the flood peak can cause severe blockages and equipment damage, preventing the units from operating normally. Therefore, there is an urgent need for a method to quickly restore the stable operation of pumped storage power station units after the flood peak.

[0030] During periods of heavy rainfall, sediment may overflow the silt traps and enter the reservoir, resulting in high sediment content. In such cases, the turbine units typically need to cease operation to avoid damage to the equipment. Operation resumes only after the rainfall ends and the flood peak has passed. Figure 2 and Figure 3 The unit control system shown starts the unit. The typical start-up method is as follows: Figure 1 As shown, first start all auxiliary systems. After the auxiliary systems and technical water supply are normal, switch to power generation mode and enter the rotating standby state to complete the startup.

[0031] However, during the cleaning of the technical water supply filter after the flood, it was found that the settled silt amounted to as much as 1 / 3 of the filter's volume, suggesting that there was a significant amount of silt in the tailpipe. Figure 3 As shown, the technical water intake is located at the bottom of the outlet of the elbow section of the tailrace pipe, where a large amount of silt will accumulate. If the power generation is started directly, the technical water supply system will carry the silt into the coolers and flow components of the unit after it starts, causing more serious blockages or equipment damage, which will prevent the unit from operating stably.

[0032] For example, during unit operation, the main shaft seal water source is drawn from the lower reservoir, which has a high silt content. This significantly accelerates the wear of the main shaft seal during operation, leading to turbine leakage and even causing water to enter the turbine pit via the runner and main shaft seal, resulting in flooding of the powerhouse. The cooling water source for components such as the main transformer, generator, and guide bearings is also drawn from the lower reservoir. Silt accumulation can easily clog the coolers, affecting cooling efficiency. Silt particles larger than 0.025mm in diameter can cause surface abrasion on turbine flow components such as fixed and movable guide vanes and the runner, exacerbating cavitation. When cavitation bubbles form in silt-laden water, the pressure is 10%-15% higher than in clean water. The combined effect of cavitation and wear results in more severe cavitation, causing significant damage to the unit. The high silt content in the lower reservoir can also damage the shaft seals of the technical water supply pump and the main shaft seal booster pump, leading to substantial leakage. Simultaneously, excessive pressure differentials and filter clogging in auxiliary equipment filters affect filtration performance.

[0033] The following describes specific embodiments in conjunction with... Figures 2 to 7 The technical solution of this application will be described in detail below.

[0034] Some embodiments of this application provide a method for the initial startup of a pumped-storage power station unit after a flood peak, applied to the unit control system, such as... Figure 2 The diagram shown is a modular structure diagram of the unit control system. The unit control system includes auxiliary systems and some electrical systems, such as... Figure 3 The diagram shows the piping connections of the generator control system. The large structure in the middle is the generator unit. Inside the generator unit are upper guides, lower guides, and water guides. The side of the generator unit is connected to an inlet valve, which connects to the upper reservoir of the power station. The trumpet-shaped elbow pipe connected to the bottom of the generator unit is the tailrace pipe, which connects to the lower reservoir of the power station. SFC (Static Frequency Converter) is a static frequency converter. Some electrical and auxiliary systems are omitted in the diagram.

[0035] like Figure 4 and Figure 5 As shown, the startup method includes the following steps:

[0036] S1. Start some auxiliary systems in the unit control system.

[0037] Start some auxiliary systems to provide the necessary operating conditions and environment for the unit. At this time, do not start the technical water supply system and the main shaft seal water supply system to prevent mud and sand from entering the components with the cooling water, causing blockage and damage to the equipment.

[0038] S2. Switch the unit operating mode of the unit control system to the power generation mode and perform no-load flushing of the unit.

[0039] The control electrical system is switched to power generation mode, and the water pressure and flow rate of the unit under no-load operation are used to clean the tailwater pipe to reduce the impact on the unit's technical water supply and main shaft seal, while also flushing away the mud and sand at the unit's inlet and outlet areas.

[0040] S3. After the rinsing has been completed for a preset time, turn on the water pump of the technical water supply system and the booster pump of the spindle seal water supply system in the auxiliary machine system, and close the drain valve of the transformer no-load cooling system.

[0041] With a preset time greater than or equal to 300 seconds, after rinsing for a period of time, the technical water supply system starts, draws water from the tailpipe, pressurizes it, and then provides cooling water to the three guides and air cooler; the spindle seal water supply system starts to lubricate and prevent the top cover of the water guide from being lifted, causing water to flow back; the drain valve of the transformer no-load cooling system is closed to ensure that the cooling water is supplied by the technical water supply system. The technical water supply system is opened first and then the transformer no-load cooling system is closed to ensure stable water flow and normal cooling function.

[0042] S4. When all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate, the first start-up of the unit is completed.

[0043] The monitoring system receives feedback signals that all auxiliary systems are operating normally, and the technical water supply flow rate meets the working flow rate, which is, for example, 85% to 95% of the rated flow rate. At this time, the unit returns to normal operating standby status and can be synchronized with the grid to complete the first start-up of the unit.

[0044] By starting the auxiliary systems in batches, the tailrace pipe of the unit can be flushed first, removing silt from the inlet and outlet, thus reducing the impact on the technical water supply and the main shaft seal. Testing has shown that this method allows the unit to start successfully on the first attempt and connect to the grid as quickly as possible, without requiring changes to the pipeline connections. Simply changing the starting method ensures safe and stable operation of the unit at a low cost.

[0045] The method for starting up pumped storage power station units after the flood peak is simple and convenient, and can quickly and effectively restore stable operation of the units, avoiding equipment blockage or damage.

[0046] In some embodiments, step S1 includes:

[0047] S101. Activate the oil pressure control system, water-guided bearing cooling system, high-pressure oil injection system, and oil mist separation system in the auxiliary machine system, and energize the solenoid valve of the speed governor emergency stop system in the auxiliary machine system.

[0048] Turn on the field PLC (Programmable Logic Controller) of the hydraulic control system to control the opening and closing of pumps, valves and guide vanes; turn on the water guide bearing cooling system to cool the water guide; turn on the high-pressure oil injection system to form an oil film between the clean plate and thrust bearing of the lower guide; turn on the oil mist separation system to balance the pressure; and energize the solenoid valve of the governor emergency stop system to prevent emergency situations.

[0049] In some embodiments, step S1 is followed by:

[0050] S102. Turn off the wind tunnel heater in the auxiliary system.

[0051] The unit has partially started generating heat, so the wind tunnel heaters are shut down to improve energy efficiency.

[0052] S103. After the mechanical braking system in the auxiliary system is engaged, it is disengaged.

[0053] After the mechanical braking system is engaged, it is disengaged, i.e., the mechanical brakes are tested to ensure that the unit can be stopped at any time.

[0054] S104. Control the guide vane hydraulic locking system in the auxiliary machine system to exit.

[0055] During the flood season, the unit will be shut down and the guide vanes will be locked. When restarting the unit, the hydraulic locking system of the guide vanes needs to be disengaged.

[0056] In some embodiments, switching the unit operating condition of the unit control system to the power generation operating condition includes:

[0057] S201. Control the commutator switch in the unit control system to power generation mode.

[0058] Close the reversing switch to power generation mode.

[0059] S202. Control the excitation system in the unit control system to power generation mode.

[0060] S203. Open the water inlet valve in the unit control system.

[0061] Open the inlet valve to allow water from the upper reservoir to enter the unit.

[0062] In some embodiments, the no-load flushing of the unit includes:

[0063] S204. When the opening degree of the water inlet valve is greater than or equal to the preset opening degree, the speed regulation system in the unit control system is controlled to power generation mode to perform no-load flushing of the unit.

[0064] If the preset opening degree is, for example, 40%, and the inlet valve is partially opened, the flow channel is unobstructed. To improve the startup speed, the startup process can be executed downwards to improve startup efficiency.

[0065] The speed control system switches to power generation mode, causing the guide vanes to start rotating. The pressure water in the upper reservoir is used to flush away the mud and sand near the tailrace pipe and the unit outlet. Then, the technical water supply and main shaft seal are turned on to ensure good water quality entering each component.

[0066] In some embodiments, the step of performing no-load flushing of the unit includes:

[0067] S301. When the speed measuring device of the speed control system is operating normally and the guide vane speed of the unit is greater than or equal to the preset speed, the high-pressure oil injection system is shut down and the excitation system is turned on.

[0068] When the monitoring system receives a feedback signal that the speed measuring device is operating normally, and the preset speed is, for example, 95% of the rated speed, and the guide vane speed is greater than or equal to the preset speed, the unit is close to normal operation. The oil film can be maintained automatically and no further oil injection is needed. The high-pressure oil injection system is shut down, the excitation system is turned on, and power generation begins.

[0069] In some embodiments, completing the initial startup of the unit includes:

[0070] S401. When the terminal voltage of the unit is greater than or equal to the preset voltage, the first start-up of the unit is completed.

[0071] The preset voltage is, for example, 85% of the rated voltage. When the terminal voltage of the unit is greater than or equal to the preset voltage, the unit has basically reached the rated speed and rated voltage and has entered the rotating standby state, preparing for subsequent synchronous grid connection.

[0072] In some embodiments, the preset time is 300 seconds.

[0073] During the no-load flushing operation of the unit, the temperature rise of each guide bearing and generator must not exceed the allowable value. The temperature of the thrust bearing should be controlled below 70℃ and the temperature of the guide bearing should be controlled below 55℃. When the temperature approaches this level, the unit needs to be shut down. Under the condition of meeting this temperature limit, the flushing time should be increased as much as possible to ensure that the mud and sand are washed away.

[0074] Example 1

[0075] According to the No. 1 generating unit of a pumped storage power station in Hebei Province Figure 4The pumped storage power station unit was started for the first time after the flood peak in the manner shown. The preset time was 120 seconds. It was found that a large amount of muddy water gushed out from the mechanical seal of the pump shaft after about 60 seconds. The current and pressure returned to normal values, indicating that the 120-second flushing time was too short and insufficient to clean the mud and sand in the tailrace pipe.

[0076] Example 2

[0077] According to the No. 2 generating unit of a pumped storage power station in Hebei Province Figure 4 The pumped storage power station unit was started for the first time after the flood peak as shown. The preset time was 300 seconds. It was found that the guide shaft temperature rose to close to the control temperature after about 300 seconds. At this time, the technical water supply pump and the main shaft seal booster pump were started. The water pump started normally, the shaft seal was not worn, and the water quality of the manually discharged water from the filter was relatively clear. As the cooling water was introduced, the temperature rise of each bearing gradually slowed down and approached the normal value of daily operation.

[0078] Example 3

[0079] Following a recent flood peak, four generating units at a pumped-storage power station in Hebei Province were... Figure 5 The pumped storage power station units were started for the first time after the flood peak, as shown in the diagram. All four units started successfully at once and were connected to the power grid as quickly as possible, restoring normal operation.

[0080] Comparative Example 1

[0081] Following the concurrent rainfall peak in Example 3, the generating units of a pumped storage power station in Jilin were... Figure 1 The pumped storage power station units were started for the first time after the flood peak, as shown in the diagram. The units were taken out of service for about 17 days, resulting in severe equipment damage and huge losses.

[0082] It is understood that before using the technical solutions of the various embodiments in this disclosure, users will be informed of the type, scope of use, and usage scenarios of the personal information involved in an appropriate manner, and user authorization will be obtained.

[0083] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose, based on the prompt message, whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media performing the operations of this disclosed technical solution.

[0084] As an optional but not limited implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0085] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this disclosure.

[0086] In some embodiments of this application, a device for the first start-up of a pumped storage power station unit after a flood peak is provided, such as... Figure 6 As shown, the system includes: a first start-up module 61, configured to start some auxiliary systems in the unit control system; a working condition switching module 62, configured to switch the unit working condition of the unit control system to the power generation working condition and perform no-load flushing of the unit; a second start-up module 63, configured to start the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary systems and close the drain valve of the transformer no-load cooling system after the flushing has been completed for a preset time; and a start-up judgment module 64, configured to complete the first start-up of the unit when all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate.

[0087] The apparatus described above is used to implement the method for the first start-up of pumped storage power station units after the flood peak in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0088] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for the first start-up of a pumped storage power station unit after a flood peak as described in any of the above embodiments.

[0089] Figure 7 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0090] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0091] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0092] The input / output interface 1030 is used to connect input / output modules to realize information input and output. The input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. The input devices can include keyboards, mice, touchscreens, microphones, various sensors, etc., and the output devices can include displays, speakers, vibrators, indicator lights, etc.

[0093] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication and interaction between this device and other devices. The communication module can communicate via wired means (e.g., USB, Ethernet cable, etc.) or wireless means (e.g., mobile network, WIFI, Bluetooth, etc.).

[0094] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0095] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0096] The electronic equipment described above is used to implement the method for the first start-up of pumped storage power station units after the flood peak in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0097] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium storing computer instructions, which are used to cause the computer to execute the method for the first start-up of a pumped storage power station unit after a flood peak as described in any of the above embodiments.

[0098] The non-transitory computer-readable medium of this embodiment includes both permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, 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 disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0099] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the method for the first start-up of pumped storage power station units after a flood peak as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0100] Based on the same concept, corresponding to the methods of any of the above embodiments, this application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer causes the computer to execute the method for the first start-up of a pumped storage power station unit after a flood peak as described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments, and will not be repeated here.

[0101] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0102] Furthermore, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the apparatus may be shown in block diagram form. This is to prevent the embodiments of this application from being difficult to understand, and it also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully within the understanding of those skilled in the art). In setting forth specific details to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application may be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0103] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0104] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A method for the first start-up of a pumped-storage power station unit after a flood peak, applied to the unit control system, characterized in that, include: Activating certain auxiliary systems in the unit control system includes: activating the hydraulic control system, water-guided bearing cooling system, high-pressure oil injection system, and oil mist separation system in the auxiliary systems; energizing the solenoid valve of the governor emergency stop system in the auxiliary systems; and shutting down the wind tunnel heater in the auxiliary systems. The mechanical braking system in the auxiliary systems is then activated and deactivated. The guide vane hydraulic locking system in the auxiliary systems is deactivated. Switching the unit operating mode of the unit control system to the power generation mode and performing no-load flushing of the unit includes: controlling the reversing switch in the unit control system to power generation mode; controlling the excitation system in the unit control system to power generation mode; opening the water inlet valve in the unit control system, and when the opening degree of the water inlet valve is greater than or equal to the preset opening degree, controlling the speed regulation system in the unit control system to power generation mode to perform no-load flushing of the unit. When the speed measuring device of the speed control system is operating normally and the guide vane speed of the unit is greater than or equal to the preset speed, the high-pressure oil injection system is shut down and the excitation system is turned on; after the flushing has been completed for a preset time, the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary machine system are turned on, and the drain valve of the transformer no-load cooling system is turned off. When all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate, the first start-up of the unit is completed. The first start-up of the unit is completed when the terminal voltage of the unit is greater than or equal to the preset voltage.

2. The method for the first start-up of a pumped storage power station unit after a flood peak, as described in claim 1, is characterized in that... The preset time is 300s, the preset opening degree is 40%, the preset speed is 95% of the rated speed, and the preset voltage is 85% of the rated voltage.

3. A device for the first start-up of a pumped-storage power station unit after a flood peak, characterized in that, include: The first startup module is configured to activate some auxiliary systems in the unit control system, including: activating the hydraulic control system, water guide bearing cooling system, high-pressure oil injection system, and oil mist separation system in the auxiliary systems; energizing the solenoid valve of the governor emergency stop system in the auxiliary systems; and shutting down the wind tunnel heater in the auxiliary systems; controlling the mechanical braking system in the auxiliary systems to engage and disengage; and controlling the guide vane hydraulic locking system in the auxiliary systems to disengage. The operating condition switching module is configured to switch the unit operating condition of the unit control system to the power generation operating condition and perform no-load flushing of the unit, including: controlling the reversing switch in the unit control system to power generation mode; controlling the excitation system in the unit control system to power generation mode; and opening the water inlet valve in the unit control system. When the valve opening is greater than or equal to the preset opening, the speed control system in the unit control system is controlled to power generation mode to perform no-load flushing of the unit; the second start-up module is configured to shut down the high-pressure oil injection system and start the excitation system when the speed measuring device of the speed control system is operating normally and the guide vane speed of the unit is greater than or equal to the preset speed; after the flushing has passed a preset time, the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary machine system are turned on, and the drain valve of the transformer no-load cooling system is turned off; the start-up judgment module is configured to complete the first start-up of the unit when all the auxiliary machine systems are operating normally and the technical water supply flow rate meets the working flow rate, and the completion of the first start-up of the unit includes: when the terminal voltage of the unit is greater than or equal to the preset voltage, the first start-up of the unit is completed.

4. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for the first start-up of a pumped storage power station unit after a flood peak as described in claim 1 or 2.

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