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

Abstract

The invention provides a method for starting a pumped storage power station unit for the first time after a flood peak and related equipment, the method for starting the pumped storage power station unit for the first time after the flood peak is applied to a unit control system, and the method comprises the following steps: starting part of auxiliary machine systems in the unit control system; the unit working condition of the unit control system is switched to the power generation working condition, and unit no-load flushing is conducted; after washing for a preset time, a water pump of a technical water supply system in the auxiliary machine system and a booster pump of a main shaft sealing water supply system are started, and a drain valve of a transformer no-load cooling system is closed; and when all the auxiliary machine systems operate normally and the technical water supply flow conforms to the working flow, the unit is started for the first time. The method for starting the pumped storage power station unit for the first time after the flood peak and the related equipment are simple and convenient, stable operation of the unit can be quickly and effectively recovered, and equipment blockage or damage is avoided.

Description

Technical Field

[0001] The present application relates to the field of pumped storage power station control technology, and in particular to a method for starting a pumped storage power station unit for the first time after a flood peak and related equipment. Background Art

[0002] Pumped storage is the use of electricity during the low load period to pump water to the upper reservoir, and then release the water stored in the upper reservoir to the lower reservoir for power generation during the peak load period, also known as energy storage power generation. It can convert the excess electricity during the low load period of the power grid into high-value electricity during the high load period of the power grid, suitable for frequency and phase modulation, can be used to stabilize the frequency and voltage of the power system, and is suitable for emergency standby, 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 impact on electricity. With the long-term operation of pumped-storage power stations, it is found that after the flood peak in the flood season, restarting the unit will cause serious blockage and equipment damage, resulting in the unit being unable to operate normally. Therefore, there is an urgent need for a method for the first start-up of a pumped-storage power station unit after the flood peak that can quickly restore the stable operation of the unit. Summary of the invention

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

[0005] In a first aspect of the present application, a method for the first start-up of a pumped-storage power station unit after a flood peak is provided, which is applied to a unit control system, and includes: starting some auxiliary systems in the unit control system; switching the unit operating condition of the unit control system to the power generation condition, and performing no-load flushing of the unit; after a preset flushing time, starting the water pump of the technical water supply system and the booster pump of the main shaft seal water supply system in the auxiliary system, 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 first start-up of the unit is completed.

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

[0007] Furthermore, the starting of some auxiliary systems in the control system of the unit includes: shutting down the wind tunnel heater in the auxiliary system; controlling the mechanical braking system in the auxiliary system to be put into operation and then exit; controlling the guide vane hydraulic locking system in the auxiliary system to exit.

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

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

[0010] Furthermore, the no-load flushing of the unit includes: when the speed measuring device of the speed control system operates normally and the guide vane speed of the unit is greater than or equal to a preset speed, closing the high-pressure oil injection system and opening the excitation system.

[0011] Further, completing the first startup of the unit includes: when the terminal voltage of the unit is greater than or equal to a preset voltage, completing the first startup of the unit.

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

[0013] According to a second aspect of the present application, there is provided a device for the first start-up of a pumped-storage power station unit after a flood peak, comprising: a first start-up module, configured to start some auxiliary systems in the unit control system; a working condition switching module, configured to switch the unit working condition of the unit control system to the power generation condition, and perform no-load flushing of the unit; a second start-up module, 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 system after a preset flushing time, and close the drain valve of the transformer no-load cooling system; a start-up judgment module, 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.

[0014] The third aspect of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for starting a pumped-storage power station unit for the first time after the flood peak as described in the first aspect above is implemented.

[0015] In a fourth aspect of the present application, a non-transitory computer-readable storage medium is provided, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method for starting a pumped-storage power station unit for the first time after a flood peak as described in the first aspect above.

[0016] The fifth aspect of the present application provides a computer program product, including computer program instructions, characterized in that when the computer program instructions are executed on a computer, the computer executes the method for first starting a pumped-storage power station unit after a flood peak as described in the first aspect above.

[0017] As can be seen from the above, the present application provides a method and related equipment for the first start-up of a pumped storage power station unit after a flood peak. The start-up method includes starting part of the auxiliary systems in the unit control system; switching the unit operating condition of the unit control system to the power generation condition, and performing no-load flushing of the unit; after the preset flushing time, starting the water pump of the technical water supply system in the auxiliary system and the booster pump of the main shaft seal water supply system, 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 first start-up of the unit is completed. By starting the auxiliary system in batches, the tailwater pipe of the unit can be flushed first, and the silt can be flushed away from the inlet and outlet, reducing the impact on the technical water supply and the main shaft seal. After testing, this method can enable the unit to be successfully started once and connected to the power grid at the fastest speed, without changing the pipeline connection method. Only by changing the starting method can the safe and stable operation of the unit be ensured, and the cost is low. The method and related equipment for the first start-up of the pumped-storage power station unit after the flood peak are simple and convenient, and can quickly and effectively restore the stable operation of the unit and avoid equipment blockage or damage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 It is a schematic diagram of the execution logic of the unit startup method in the related art;

[0020] Figure 2 It is a schematic diagram of the module structure of the unit control system;

[0021] Figure 3 This is a schematic diagram of the piping connection of the unit control system;

[0022] Figure 4 A schematic flow chart of a method for starting a pumped-storage power station unit for the first time after a flood peak in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the execution logic of a method for starting a pumped-storage power station unit for the first time after a flood peak in an embodiment of the present application;

[0024] Figure 6 This is a structural schematic diagram of a device for first starting a pumped-storage power station unit after a flood peak in an embodiment of the present application;

[0025] Figure 7 It is a schematic diagram of the structure of an electronic device in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be understood by people with ordinary skills in the field to which the present application belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0028] Pumped storage is the use of electricity during the low load period to pump water to the upper reservoir, and then release the water stored in the upper reservoir to the lower reservoir for power generation during the peak load period, also known as energy storage power generation. It can convert the excess electricity during the low load period of the power grid into high-value electricity during the high load period of the power grid, suitable for frequency and phase modulation, can be used to stabilize the frequency and voltage of the power system, and is suitable for emergency standby, 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 impact on electricity. With the long-term operation of pumped-storage power stations, it is found that after the flood peak in the flood season, restarting the unit will cause serious blockage and equipment damage, resulting in the unit being unable to operate normally. Therefore, there is an urgent need for a method for the first start-up of a pumped-storage power station unit after the flood peak that can quickly restore the stable operation of the unit.

[0030] When a pumped storage power station experiences heavy rainfall, sediment may cross the sediment barrier and enter the reservoir, resulting in a high sediment content. At this time, the turbine unit generally needs to stop running to avoid sand damage to the unit equipment. Wait until the rainfall ends and the flood peak passes before continuing to operate. Figure 2 and Figure 3 The unit control system shown starts the unit. The usual starting method is as follows: Figure 1 As shown, first start all auxiliary systems, and after the auxiliary systems and technical water supply are normal, switch to the power generation state, enter the rotating standby state, and complete the startup.

[0031] However, when the technical water supply filter was cleaned after the flood, it was found that the silt after sedimentation was as much as 1 / 3 of the filter volume. It is speculated that there is a lot of silt in the tailwater pipe, such as Figure 3 As shown, the technical water supply intake is located at the bottom of the tailwater pipe elbow section outlet, where a large amount of silt will accumulate. If the power generation is started directly, the silt will be brought into the unit's coolers and flow components after the technical water supply system is started, causing more serious blockage or equipment damage, resulting in the unit being unable to operate stably.

[0032] For example: when the unit is running, the main shaft seal water source is taken from the lower reservoir. The water supply has a high sand content, which will greatly increase the wear of the main shaft seal when the unit is running, causing the turbine to lose its seal and leak, and even cause the water in the flow channel to enter the turbine pit through the runner through the main shaft seal, causing flooding of the plant. The cooling water source for the main transformer, generator, guide bearing and other components is taken from the lower reservoir. The sediment accumulation can easily cause the cooler to be blocked, affecting the cooling effect. Sediment particles with a diameter greater than 0.025mm will cause surface grinding to the turbine flow components such as fixed guide vanes, movable guide vanes, and runners, and aggravate cavitation. When the sediment-containing water flow produces cavitation bubbles, the pressure is 10%-15% higher than that of clean water. The cavitation caused by the combined action of cavitation and wear is more serious, which will cause great harm to the unit. Due to the high sediment content in the lower reservoir, the technical water supply pump and the main shaft seal booster pump shaft seal are easily damaged, and the leakage is large. At the same time, the pressure difference of each auxiliary machine filter is too large, and the filter screen is blocked, affecting the filtering performance.

[0033] Below, through specific embodiments and combined Figures 2 to 7 To describe the technical solution of this application in detail.

[0034] Some embodiments of the present application provide a method for starting a pumped storage power station unit for the first time after a flood peak, which is applied to a unit control system, such as Figure 2 As shown in the figure, it is a schematic diagram of the module structure of the unit control system. The unit control system includes auxiliary system and some electrical systems, such as Figure 3 As shown in the figure, it is a schematic diagram of the piping connection of the unit control system. The large structure in the middle of the figure is the unit. The unit is equipped with an upper guide, a lower guide and a water guide. The side of the unit is connected to a water inlet valve, which is connected to the upper reservoir of the power station. The trumpet-shaped elbow pipe connected to the bottom of the unit is the tailwater pipe, which is connected to the lower reservoir of the power station. SFC (Static Frequency Converter) is a static frequency converter. Some electrical systems and auxiliary systems are omitted in the figure.

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

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

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

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

[0039] The control electrical system is switched to the power generation condition, and the tailwater pipe is cleaned using the water pressure and flow of the unit's no-load operation to reduce the impact on the unit's technical water supply and main shaft seal, while flushing the silt at the unit's inlet and outlet away from the inlet and outlet areas.

[0040] S3. After the preset flushing time, the water pump of the technical water supply system in the auxiliary system and the booster pump of the main shaft seal water supply system are turned on, and the drain valve of the transformer no-load cooling system is closed.

[0041] The preset time is greater than or equal to 300s. After flushing for a period of time, the technical water supply system starts, takes water from the tailwater pipe, pressurizes it, and then provides cooling water to the three-guide and air cooling; the main shaft seal water supply system starts for lubrication to prevent the top cover of the water guide from being lifted up and causing water to flow back; close the drain valve of the transformer no-load cooling system to ensure that the cooling water is provided by the technical water supply system, open the technical water supply system first and then close the transformer no-load cooling system 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 the auxiliary systems are operating normally, and the technical water supply flow rate meets the working flow rate, such as 85% to 95% of the rated flow rate. At this time, the unit returns to the normal rotating standby state and can be synchronously connected to the grid to complete the first start-up of the unit.

[0044] By starting the auxiliary system in batches, the tailwater pipe of the unit can be flushed first to flush the silt away from the water inlet and outlet, reducing the impact on the technical water supply and the main shaft seal. After testing, this method can enable the unit to be successfully started at one time and connected to the power grid at the fastest speed. There is no need to change the pipeline connection method. Only by changing the starting method can the unit be ensured to operate safely and stably, with low cost.

[0045] The initial startup method of the pumped-storage power station unit after the flood peak is simple and convenient, which can quickly and effectively restore the stable operation of the unit and avoid equipment blockage or damage.

[0046] In some embodiments, step S1 includes:

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

[0048] Turn on the on-site PLC (Programmable Logic Controller) of the oil pressure control system to control the opening and closing of the pump, 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 net plate and thrust bearing of the lower guide; turn on the oil mist separation system to balance the pressure; energize the solenoid valve of the governor emergency shutdown system to prevent emergencies.

[0049] In some embodiments, step S1 includes:

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

[0051] Part of the unit has started to generate heat during operation, so the wind tunnel heater is turned off to improve energy utilization.

[0052] S103, controlling the mechanical brake system in the auxiliary system to be engaged and then exit.

[0053] The mechanical brake system is put into operation and then withdrawn, that is, the mechanical brake is tested to ensure that the unit can be shut down at any time.

[0054] S104, controlling 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 the unit is started again, the guide vane hydraulic locking system needs to be exited.

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

[0057] S201, controlling the reversing switch in the control system of the unit to a power generation mode.

[0058] Close the reversing switch to generating mode.

[0059] S202, controlling the excitation system in the control system of the unit to be in power generation mode.

[0060] S203, opening the water inlet valve in the control system of the unit.

[0061] Open the water inlet valve and the water from the upper reservoir enters the unit.

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

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

[0064] The preset opening is, for example, 40%. After the water inlet valve is partially opened, the flow path is unblocked. To increase the startup speed, the startup process can be executed downwards to improve the startup efficiency.

[0065] The speed control system switches to power generation mode, causing the guide vanes to start rotating. The pressurized water from the upper reservoir is used to flush away the silt near the tailwater pipe and the unit outlet. The technical water supply and main shaft seal are then opened to ensure that the water quality entering each component is good.

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

[0067] S301. When the speed measuring device of the speed control system operates 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 closed and the excitation system is opened.

[0068] The monitoring system receives a feedback signal that the speed measuring device is operating normally. The preset speed is, for example, 95% of the rated speed. 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 automatically maintained, and no more oil injection is required. The high-pressure oil injection system is closed, the excitation system is turned on, and power generation begins.

[0069] In some embodiments, completing the first 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 300s.

[0073] During the no-load flushing operation of the unit, the temperature rise of each guide bearing and generator cannot exceed the allowable value, the thrust bearing temperature is controlled below 70°C, and the guide bearing temperature is controlled below 55°C. When it approaches this temperature, it is necessary to shut down. While meeting the temperature limit conditions, the flushing time should be increased as much as possible to ensure that the mud and sand are flushed away.

[0074] Example 1

[0075] Unit 1 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 120s. It was found that a large amount of muddy water gushed out from the mechanical seal of the pump shaft after about 60s, and the current and pressure returned to normal values, indicating that the flushing time of 120s was too short and was not enough to flush the mud in the tailwater pipe clean.

[0076] Example 2

[0077] The No. 2 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 in the manner shown. The preset time was 300s. It was found that the guide shaft temperature rose close to the control temperature after about 300s. 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 manual sewage discharge from the filter was relatively clear. With the addition of cooling water, the temperature of each bearing rose slowly, gradually approaching the normal value of daily operation.

[0078] Example 3

[0079] After a rainfall peak, four units of a pumped storage power station in Hebei were Figure 5 The pumped-storage power station units were started for the first time after the flood peak in the manner shown. The four units were successfully started at one time, connected to the grid at the fastest speed, and resumed normal operation.

[0080] Comparative Example 1

[0081] After the peak rainfall in the same period as in Example 3, the units of a pumped storage power station in Jilin were Figure 1 The pumped-storage power station unit was started for the first time after the flood peak in the manner shown. The unit was put into standby for about 17 days, the equipment was severely damaged, and the loss was huge.

[0082] It is understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0083] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0084] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

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

[0086] In some embodiments of the present application, a device for starting a pumped storage power station unit for the first time after a flood peak is provided, such as Figure 6 As shown, it includes: a first starting module 61, which is configured to start some auxiliary systems in the unit control system; a working condition switching module 62, which is configured to switch the unit working condition of the unit control system to the power generation condition, and perform no-load flushing of the unit; a second starting module 63, which is 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 system after a preset flushing time, and close the drain valve of the transformer no-load cooling system; a starting judgment module 64, which is 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 device of the above embodiment is used to implement the corresponding method of starting the pumped storage power station unit for the first time after the flood peak in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0088] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method for starting a pumped-storage power station unit for the first time after the flood peak described in any of the above embodiments is implemented.

[0089] Figure 7 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040 and a bus 1050. It is characterized in that the processor 1010, the memory 1020, the input / output interface 1030 and the communication interface 1040 realize communication connection with each other inside the device through the bus 1050.

[0090] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an 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 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0092] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured as a component in the device (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. It is characterized in that the input device can include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device can include a display, a speaker, a vibrator, an indicator light, etc.

[0093] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0094] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0095] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0096] The electronic device of the above embodiment is used to implement the corresponding method of starting the pumped storage power station unit for the first time after the flood peak in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be repeated here.

[0097] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable 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 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, modules of programs, or other data. Examples of storage media for computers 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 technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0099] The computer instructions stored in the storage medium of the above embodiment are used to enable the computer to execute the method for starting the pumped-storage power station unit for the first time after the 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 any of the above-mentioned embodiment methods, the present application also provides a computer program product, including computer program instructions. When the computer program instructions are run on a computer, the computer executes the method for starting a pumped-storage power station unit for the first time after the 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 illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0102] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the device can be shown in the form of a block diagram, so as to avoid making the embodiments of the present application difficult to understand, and this also takes into account the following fact, that is, the details of the implementation method of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details to describe the exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

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

[0104] The embodiments of the present 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 the present application should be included in the scope of protection of the present application.

Claims

1. A method for starting a pumped storage power station unit for the first time after a flood peak, applied to a unit control system, characterized in that: include: Starting some auxiliary systems in the control system of the unit; Switching the unit operating condition of the unit control system to the power generation condition to perform no-load flushing of the unit; After the preset flushing time, the water pump of the technical water supply system in the auxiliary system and the booster pump of the main shaft seal water supply system are turned on, and the drain valve of the transformer no-load cooling system is closed; 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.

2. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 1, characterized in that: The step of starting some auxiliary systems in the control system of the unit includes: The oil pressure control system, the water-guided bearing cooling system, the high-pressure oil injection system and the oil mist separation system in the auxiliary system are turned on, and the solenoid valve of the governor emergency stop system in the auxiliary system is excited.

3. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 2, characterized in that: The step of starting part of the auxiliary systems in the control system of the unit includes: Turning off the wind tunnel heater in the auxiliary system; Controlling the mechanical brake system in the auxiliary system to be engaged and then exit; Control the guide vane hydraulic locking system in the auxiliary machine system to exit.

4. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 3, characterized in that: The step of switching the unit operating state of the unit control system to a power generation state includes: Controlling the reversing switch in the control system of the unit to a power generation mode; Controlling the excitation system in the control system of the unit to a power generation mode; Open the water inlet valve in the control system of the unit.

5. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 4, characterized in that: The no-load flushing of the unit includes: When the opening of the water inlet valve is greater than or equal to the preset opening, the speed regulating system in the control system of the unit is controlled to be in the power generation mode to perform no-load flushing of the unit.

6. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 5, characterized in that: The unit no-load flushing includes: When the speed measuring device of the speed control system operates 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 closed and the excitation system is opened.

7. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 6, characterized in that: The first start-up of the unit is completed, including: 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.

8. The method for starting a pumped storage power station unit for the first time after a flood peak according to claim 7, characterized in that: The preset time is 300s, the preset opening is 40%, the preset speed is 95% of the rated speed, and the preset voltage is 85% of the rated voltage.

9. A device for starting a pumped storage power station unit for the first time after a flood peak, characterized in that: include: A first start-up module is configured to start a part of the auxiliary systems in the unit control system; A working condition switching module is configured to switch the unit working condition of the unit control system to the power generation condition to perform no-load flushing of the unit; The second start-up module is 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 machine system after the preset flushing time, and close the drain valve of the transformer no-load cooling system; The startup judgment module is configured to complete the first startup of the unit when all the auxiliary systems are operating normally and the technical water supply flow rate meets the working flow rate.

10. 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. When the processor executes the computer program, it implements the method for first starting a pumped-storage power station unit after a flood peak as described in any one of claims 1 to 8.

Images