Start control method, system and equipment of pumped storage power station unit and medium

Abstract

The invention provides a start control method, system and device for a pumped storage power station unit and a medium. Under the condition that a power grid and a static variable-frequency starting device have faults, in order to normally start a target unit, an auxiliary unit and various data judgment and corresponding modes of the target unit are controlled, operation in a back-to-back dragging mode is utilized, and the target unit is dragged by the auxiliary unit to start; therefore, the target unit is dragged and started to be merged into the power grid to execute the power function of pumped storage, and reliable power service can be provided when needed.

Description

Technical Field

[0001] The present application relates to the field of power control technology, and in particular to a startup control method, system, equipment and medium for a pumped storage power station unit. 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] In conventional startup methods, pumped storage power station units usually rely on static variable frequency starting devices for startup. However, in emergency situations where the power grid and static variable frequency starting devices fail, how to ensure that the units can be started and put into operation quickly and reliably has become an urgent problem to be solved. Summary of the invention

[0004] In view of this, the purpose of the present application is to propose a startup control method, system, equipment and medium for a pumped storage power station unit to solve or partially solve the above-mentioned technical problems.

[0005] Based on the above purpose, the present application provides a start-up control method for a pumped storage power station unit, which is applied to a pumped storage power station control system, including: a target unit and an auxiliary unit are connected together through a bus, the target unit includes: a target neutral point switch, a target excitation system, a target dragged switch, a target commutation switch and a target export switch, and the auxiliary unit includes: an auxiliary neutral point switch, an auxiliary excitation system, an auxiliary drag switch, an auxiliary commutation switch and an auxiliary export switch;

[0006] The method comprises:

[0007] The auxiliary unit disconnects the auxiliary neutral point switch;

[0008] The target unit began to apply mechanical brakes;

[0009] The auxiliary unit separates the auxiliary commutation switch and closes the auxiliary drag switch, and the target unit closes the target commutation switch and closes the target dragged switch;

[0010] The auxiliary excitation system of the auxiliary unit is set to a back-to-back drag mode, and the target excitation system of the target unit is set to a back-to-back drag mode;

[0011] The auxiliary unit began to apply mechanical brakes;

[0012] After the auxiliary unit determines that the speed and voltage of the target unit are both zero, the synchronization device is started and the auxiliary outlet switch is closed;

[0013] After the target unit determines that the auxiliary outlet switch is normally closed, the inflation and water pressure process is performed to adjust the speed governor of the target unit to the phase adjustment mode;

[0014] When the target unit determines that the ball valve of the auxiliary unit is partially opened and the inflation and water pressure process is completed, the mechanical brake is released, and the auxiliary excitation system and the target excitation system are controlled to be opened and put into use;

[0015] After the auxiliary unit determines that the auxiliary excitation system and the target excitation system are put into use, the auxiliary unit performs the mechanical brake release;

[0016] When the target unit determines that the speed proportion of the target unit is greater than the first predetermined speed proportion, and the terminal voltage proportion of the target unit is greater than the predetermined voltage proportion, the target unit switches on the target outlet switch;

[0017] After the auxiliary unit determines that the target outlet switch is closed, separate the auxiliary outlet switch and the auxiliary drag switch to start the shutdown process;

[0018] After the target unit determines that the auxiliary outlet switch of the auxiliary unit is separated, the target dragged knife switch is separated. At this time, the target unit is successfully started and operates in a phase adjustment state.

[0019] Based on the same inventive concept, the present application also provides a pumped storage power station control system, comprising: a target unit and an auxiliary unit connected together through a busbar, the target unit comprising: a target neutral point switch, a target excitation system, a target dragged switch, a target commutation switch and a target export switch, the auxiliary unit comprising: an auxiliary neutral point switch, an auxiliary excitation system, an auxiliary drag switch, an auxiliary commutation switch and an auxiliary export switch;

[0020] An auxiliary unit, configured to separate the auxiliary neutral point switch;

[0021] The target unit is configured to start applying mechanical brakes;

[0022] The auxiliary unit is configured to separate the auxiliary commutation knife switch and close the auxiliary drag knife switch, and the target unit is configured to close the target commutation knife switch and close the target drag knife switch;

[0023] The auxiliary unit is configured to set the auxiliary excitation system to a back-to-back drag mode, and the target unit is configured to set the target excitation system to a back-to-back drag mode;

[0024] The auxiliary unit is configured to start applying mechanical brakes;

[0025] The auxiliary unit is configured to start the synchronization device and close the auxiliary outlet switch after determining that the speed and voltage of the target unit are both zero;

[0026] The target unit is configured to perform an air-filling and water-pressurizing process to adjust the speed governor of the target unit to a phase-adjusting mode after determining that the auxiliary outlet switch is normally closed;

[0027] The target unit is configured to perform mechanical brake release after determining that the ball valve of the auxiliary unit is partially opened and the air and water pressure process is completed, and control the auxiliary excitation system and the target excitation system to be opened and put into use;

[0028] The auxiliary unit is configured to execute a mechanical brake after the auxiliary excitation system and the target excitation system are determined to be in use;

[0029] The target unit is configured to turn on the target output switch of the target unit when the rotation speed ratio of the target unit is greater than the first predetermined rotation speed ratio and the terminal voltage ratio of the target unit is greater than the predetermined voltage ratio;

[0030] The auxiliary unit is configured to separate the auxiliary outlet switch and the auxiliary drag knife switch after determining that the target outlet switch is closed, and start the shutdown process;

[0031] The target unit is configured to separate the target dragged knife switch after determining that the auxiliary outlet switch of the auxiliary unit is separated. At this time, the target unit is successfully started and operates in a phase adjustment state.

[0032] Based on the same inventive concept, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method as described above when executing the computer program.

[0033] Based on the same inventive concept, the present application also provides a non-transitory computer-readable storage medium, which stores computer instructions, and the computer instructions are used to enable a computer to execute the method as described above.

[0034] From the above, it can be seen that the startup control method, system, equipment and medium of the pumped-storage power station unit provided by the present application, in the event of a failure of the power grid and the static frequency conversion starting device, in order to be able to start the target unit normally, will control the various data judgments and corresponding modes of the auxiliary unit and the target unit, and utilize the back-to-back dragging mode to drag the target unit to start, thereby realizing the dragging and starting of the target unit and integrating it into the power grid to perform the power function of pumped storage, ensuring that power services can be reliably provided when needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] Figure 1 A flowchart of a startup control method for a pumped-storage power station unit according to an embodiment of the present application;

[0037] Figure 2 This is a structural block diagram of a pumped storage power station control system according to an embodiment of the present application;

[0038] Figure 3 A circuit structure diagram of a pumped storage power station control system according to an embodiment of the present application;

[0039] Figure 4 A schematic diagram of the structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] 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.

[0041] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover 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 can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The startup problem of pumped-storage power stations occupies an important position in the daily operation process. Generally, static variable frequency starting devices are used for startup. Static variable frequency starting devices are key equipment for starting the units of pumped-storage power stations. Once a failure occurs in the static variable frequency starting device, the unit cannot be put into operation in time.

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] The startup control method of the pumped-storage power station unit in the embodiment of the present application is applied to the control system of the pumped-storage power station, including: the target unit and the auxiliary unit are connected together through a bus, the target unit includes: a target neutral point switch, a target excitation system, a target dragged switch, a target commutation switch and a target export switch, and the auxiliary unit includes: an auxiliary neutral point switch, an auxiliary excitation system, an auxiliary dragging switch, an auxiliary commutation switch and an auxiliary export switch.

[0045] The method starts the unit of the pumped storage power station (i.e., the target unit) after determining that the commonly used static variable frequency starting device has failed. The execution process is as follows: Figure 1 As shown, including:

[0046] Step 101: the auxiliary unit disconnects the auxiliary neutral point switch.

[0047] In specific implementation, the purpose of separating the auxiliary neutral point switch of the auxiliary unit is to prevent erroneous operation of the stator grounding protection of the auxiliary unit.

[0048] Step 102: The target unit starts to apply mechanical brakes.

[0049] Step 103, the auxiliary unit separates the auxiliary commutation switch and closes the auxiliary drag switch, and the target unit separates the target commutation switch and closes the target dragged switch.

[0050] In specific implementation, the auxiliary unit opens the auxiliary commutation switch and closes the auxiliary drag switch to make the auxiliary unit perform the drag function mode. The target unit closes the target commutation switch and the appropriate target drag switch to make the target unit perform the passive function mode.

[0051] Step 104 , the auxiliary excitation system of the auxiliary unit is set to a back-to-back drag mode, and the target excitation system of the target unit is set to a back-to-back drag mode.

[0052] During specific implementation, in order to ensure the normal operation of the subsequent back-to-back dragging function, both the auxiliary excitation system and the target excitation system will be adjusted to the back-to-back mode.

[0053] The target unit further includes: a target protection system, and the auxiliary unit further includes: an auxiliary protection system, and the auxiliary protection system and the auxiliary excitation system are simultaneously set to a back-to-back drag mode.

[0054] Step 105: The auxiliary unit starts to apply mechanical brakes.

[0055] In some embodiments, after step 105 and before step 106, the method further includes:

[0056] Step A1, the target unit determines whether the status of the target neutral point switch, the target commutation switch, the target drag switch and the target outlet switch is normal, and determines whether the status of the target excitation system is normal, and determines whether the status of the target protection system is normal.

[0057] Step A2, the auxiliary unit determines whether the status of the auxiliary neutral point switch, auxiliary commutation switch, auxiliary drag switch and auxiliary output switch is normal, and determines whether the status of the auxiliary excitation system is normal, and determines whether the status of the auxiliary protection system is normal.

[0058] Step A3: After the target unit is determined to be normal and the auxiliary unit is determined to be normal, the auxiliary unit obtains the speed and voltage of the target unit for judgment.

[0059] In specific implementation, the target unit and the auxiliary unit will each judge the status of each switch knife to determine whether it is normal. After all are normal, the auxiliary unit will judge the speed and voltage of the target unit, and then execute step 106. In this way, the normal operation of each device of the target unit and the auxiliary unit can be guaranteed.

[0060] The auxiliary unit judges the state of the auxiliary neutral switch to prevent the stator grounding protection from erroneous operation due to the auxiliary neutral switch not being separated. The auxiliary commutation switch of the auxiliary unit is judged to be normally separated, the auxiliary drag switch is normally closed, and the target commutation switch of the target unit is normally closed, and the target dragged switch is normally closed, in order to determine whether the electrical shaft between the auxiliary unit and the target unit is established. If all are normal, it means that the electrical shaft is established.

[0061] It is determined whether the auxiliary excitation system, the target excitation system and the target protection system are normally switched to the back-to-back dragging mode. The back-to-back dragging mode is different from the conventional mode and can only be switched to the back-to-back dragging mode after all of them are normally switched to ensure that the subsequent steps 106 to 112 can be executed smoothly.

[0062] Step 106, after the auxiliary unit determines that the speed and voltage of the target unit are both zero, the synchronization device is started and the auxiliary outlet switch is closed.

[0063] In specific implementation, the synchronization device is an indication, monitoring and control device used when the auxiliary unit and the target unit are connected to the grid. It can detect whether the grid frequency, voltage amplitude and voltage phase on both sides of the connection point meet the predetermined conditions, and then realize the auxiliary monitoring device for automatic and manual grid connection of the auxiliary unit and the target unit.

[0064] The monitoring system is equipped with a synchronization device on the ground cabinet. The internal program can send commands to the synchronization device through PLC, output boards and cables. After receiving the command, the synchronization device can execute the closing of the auxiliary outlet switch.

[0065] Step 107, after the target unit determines that the auxiliary outlet switch is normally closed, the inflation and water pressure process is performed to adjust the speed governor of the target unit to the phase adjustment mode.

[0066] During specific implementation, after the auxiliary outlet switch is closed, the auxiliary unit starts and executes the air inflation and water compression process. Then the speed governor in the target unit executes the phase adjustment mode. In the phase adjustment mode, the guide vanes of the target unit are closed, which can optimize the starting characteristics of the target unit.

[0067] Step 108, after the target unit determines that the ball valve of the auxiliary unit is partially opened and the inflation and water pressure process is completed, the mechanical brake is released, and the auxiliary excitation system and the target excitation system are controlled to be turned on and put into use.

[0068] In some embodiments, determining that the ball valve of the auxiliary unit is partially opened in the target unit in step 108 includes:

[0069] The auxiliary unit opens the auxiliary unit ball valve, and after the auxiliary unit ball valve is controlled to open 40%, the target unit determines whether the auxiliary unit ball valve has completed the 40% opening. If it is, it determines that the auxiliary unit ball valve is partially opened. Then it will determine whether the inflation and water pressure process is completed. If the inflation and water pressure process is completed, the target unit will execute the exit mechanical brake operation, and then the target excitation system will start and be put into use.

[0070] Step 109, after the auxiliary unit determines that the auxiliary excitation system and the target excitation system are put into use, the auxiliary unit performs mechanical braking.

[0071] After the auxiliary excitation system is turned on and put into use, the auxiliary unit will also determine that the target excitation system is put into use, so that the auxiliary unit and the target unit are put into excitation at the same time, and the two excitation systems input excitation current, so that the auxiliary unit and the target can continue to establish a stable magnetic field. Turning on the excitation at the same time can ensure that the auxiliary unit and the target unit establish the magnetic field at the same time to maintain the consistency of the magnetic field.

[0072] In some embodiments, after step 109, the method further includes:

[0073] Step B: the speed governor of the auxiliary unit is adjusted to the power generation mode, and the guide vanes of the auxiliary unit are opened to increase the guide vane speed.

[0074] In some embodiments, after step B, the method further includes:

[0075] Step C, determining the rotational speed of the auxiliary unit and the rotational speed of the target unit. When the difference between the rotational speed of the auxiliary unit and the rotational speed of the target unit is greater than or equal to the second predetermined rotational speed, it is determined that an electrical accident exists between the auxiliary unit and the target unit, and both the auxiliary unit and the target unit execute a shutdown process.

[0076] In some embodiments, the second predetermined rotation speed accounts for 10%.

[0077] Through the above scheme, the stable operation of the auxiliary unit and the target unit can be guaranteed. Once an electrical fault is found, the unit will be shut down to avoid the loss caused by the electrical fault.

[0078] Step 110, when the target unit determines that the speed proportion of the target unit is greater than the first predetermined speed proportion, and the terminal voltage proportion of the target unit is greater than the predetermined voltage proportion, the target unit switches on the target outlet switch.

[0079] In some embodiments, step 110 includes:

[0080] Step 1101, when the target unit determines that the speed proportion of the target unit is greater than 95% and the terminal voltage proportion of the target unit is greater than 80%, the target unit will determine whether the voltage and frequency on both sides of the target outlet switch are equal, and whether the phase sequence and phase are the same.

[0081] Step 1102: When the target unit determines that the voltage and frequency on both sides of the target outlet switch are equal, and the phase sequence and phase are the same, the target outlet switch is closed.

[0082] In specific implementation, the process corresponding to the above step 1102 is synchronous closing, which can ensure that there is no impact current.

[0083] Step 111, after the auxiliary unit determines that the target outlet switch is closed, separate the auxiliary outlet switch and separate the auxiliary drag knife switch to start the shutdown process.

[0084] During the specific implementation, after the target export switch is closed, it proves that the target unit has been dragged to the grid. At this time, the auxiliary unit is no longer needed. The target unit can absorb energy from the grid side, so it is necessary to separate the auxiliary export disconnection and auxiliary dragging knife switch, and the auxiliary unit starts the shutdown process.

[0085] Step 112, after the target unit determines that the auxiliary outlet switch of the auxiliary unit is disconnected, the target dragged switch is disconnected. At this time, the target unit is successfully started and is running in a phase adjustment state.

[0086] In specific implementation, after the target unit determines that the auxiliary outlet switch is separated, the target dragged knife switch is no longer needed, and the target dragged knife switch will be separated, and then the target unit is successfully connected to the grid side. The target unit is now in phase adjustment state, and the above back-to-back dragging process is over.

[0087] Through the above scheme, in order to start the target unit normally when the power grid and the static frequency conversion starting device fail, the data judgment and corresponding modes of the auxiliary unit and the target unit will be controlled, and the back-to-back dragging mode will be used to drag the target unit to start, thereby realizing the power function of dragging the target unit to start and integrate it into the power grid to perform pumped storage, ensuring that power services can be provided reliably when needed.

[0088] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0089] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0090] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a pumped-storage power station control system.

[0091] refer to Figure 2 and Figure 3The system includes: a target unit 201 and an auxiliary unit 202 are connected together through a bus, and a main transformer 203 is used to supply energy to the target unit 201 or the auxiliary unit 202. The target unit 201 includes: a target neutral point switch 2011, a target excitation system 2012, a target drag switch 2013, a target dragged switch 2014, a target commutation switch 2015, a target export switch 2016 and a target excitation transformer 2017. The auxiliary unit 202 includes: an auxiliary neutral point switch 2021, an auxiliary excitation system 2022, an auxiliary drag switch 2023, an auxiliary dragged switch 2024, an auxiliary commutation switch 2025, an auxiliary export switch 2026 and an auxiliary excitation transformer 2027.

[0092] Auxiliary unit 202, configured to separate the auxiliary neutral point switch 2021;

[0093] The target unit 201 is configured to start applying mechanical brakes;

[0094] The auxiliary unit 202 is configured to separate the auxiliary commutation knife gate 2025 and close the auxiliary drag knife gate 2023, and the target unit 201 is configured to close the target commutation knife gate 2015 and close the target dragged knife gate 2014; (Since the auxiliary unit 202 drags the target unit 201, the auxiliary unit 202 selects to separate the auxiliary dragged knife gate 2024 and close the auxiliary drag knife gate 2023, and the target unit 201 selects to separate the target drag knife gate 2013 and close the target dragged knife gate 2014)

[0095] The auxiliary unit 202 is configured to set the auxiliary excitation system 2022 to a back-to-back drag mode, and the target unit 201 is configured to set the target excitation system 2012 to a back-to-back drag mode;

[0096] The auxiliary unit 202 is configured to start applying mechanical brakes;

[0097] The auxiliary unit 202 is configured to start the synchronization device and close the auxiliary output switch 2026 after determining that the speed and voltage of the target unit 201 are both zero;

[0098] The target unit 201 is configured to perform an air-filling and water-pressurizing process to adjust the speed governor of the target unit 201 to a phase-adjusting mode after determining that the auxiliary outlet switch 2026 is normally closed;

[0099] The target unit 201 is configured to perform mechanical brake release after determining that the ball valve of the auxiliary unit 202 is partially opened and the air-filling and water-pressurizing process is completed, and control the auxiliary excitation system 2022 and the target excitation system 2012 to be turned on and put into use. It is necessary to perform voltage transformation through the auxiliary excitation transformer 2027 and the target excitation transformer 2017 to respectively supply energy to the auxiliary excitation system 2022 and the target excitation system 2012;

[0100] The auxiliary unit 202 is configured to perform mechanical braking after determining that the auxiliary excitation system 2022 and the target excitation system 2012 are put into use;

[0101] The target unit 201 is configured to close the target outlet switch 2016 when determining that the rotation speed proportion of the target unit 201 is greater than the first predetermined rotation speed proportion and the terminal voltage proportion of the target unit 201 is greater than the predetermined voltage proportion;

[0102] The auxiliary unit 202 is configured to separate the auxiliary outlet switch 2026 and the auxiliary drag knife switch 2023 after determining that the target outlet switch 2016 is closed, and start the shutdown process;

[0103] The target unit 201 is configured to separate the target dragged knife switch 2014 after determining that the auxiliary outlet switch 2026 of the auxiliary unit 202 is separated. At this time, the target unit 201 is started successfully (specifically, the main transformer 203 is connected to the power grid through the outgoing line for energy supply) and is in a phase adjustment state for operation.

[0104] In some embodiments, the target unit 201 further includes: a target protection system, the auxiliary unit 202 further includes: an auxiliary protection system, and the auxiliary protection system and the auxiliary excitation system 2022 are simultaneously set to a back-to-back drag mode;

[0105] After the auxiliary unit 202 determines that the speed and voltage of the target unit 201 are both zero, the synchronization device is started, and before the auxiliary output switch 2026 is closed:

[0106] The target unit 201 is configured to determine whether the states of the target neutral point switch 2011, the target commutation switch 2015, the target drag switch 2014 and the target outlet switch 2016 are normal, and whether the state of the target excitation system 2012 is normal, and whether the state of the target protection system is normal;

[0107] The auxiliary unit 202 is configured to determine whether the status of the auxiliary neutral switch 2021, the auxiliary commutation switch 2025, the auxiliary drag switch 2023 and the auxiliary output switch 2026 are normal, and determine whether the status of the auxiliary excitation system 2022 is normal, and determine whether the status of the auxiliary protection system is normal;

[0108] After the target unit 201 is determined to be all normal and the auxiliary unit 202 is determined to be all normal, the auxiliary unit 202 is configured to obtain the rotation speed and voltage of the target unit 201 for judgment.

[0109] In some embodiments, the auxiliary unit 202 is configured to open the ball valve of the auxiliary unit 202. After the ball valve of the auxiliary unit 202 is controlled to open by 40%, the target unit 201 determines whether the ball valve of the auxiliary unit 202 has completed the opening of 40%. If so, it determines that the ball valve of the auxiliary unit 202 is partially opened.

[0110] In some embodiments, after the auxiliary unit 202 performs mechanical braking, the auxiliary unit 202 is configured to adjust the speed regulator to the power generation mode and open the guide vanes of the auxiliary unit 202 to increase the guide vane speed.

[0111] In some embodiments, after the speed regulator of the auxiliary unit 202 is adjusted to the power generation mode and the guide vanes of the auxiliary unit 202 are opened to increase the guide vane speed, the speed of the auxiliary unit 202 is determined, and the speed of the target unit 201 is determined. When the difference ratio between the speed of the auxiliary unit 202 and the speed of the target unit 201 is greater than or equal to the second predetermined speed ratio, it is determined that an electrical accident exists between the auxiliary unit 202 and the target unit 201, and both the auxiliary unit 202 and the target unit 201 execute a shutdown process.

[0112] In some embodiments, the second predetermined rotation speed accounts for 10%.

[0113] In some embodiments, the target unit 201 is configured to determine that when the rotation speed proportion of the target unit 201 is greater than 95% and the terminal voltage proportion of the target unit 201 is greater than 80%, the target unit 201 determines whether the voltage and frequency on both sides of the target outlet switch 2016 are equal, and whether the phase sequence and phase are the same;

[0114] The target unit 201 is configured to close the target outlet switch 2016 when the voltage and frequency on both sides of the target outlet switch 2016 are equal, and the phase sequence and phase are the same.

[0115] For the convenience of description, the above device is described in terms of functions divided into various modules. Of course, when implementing the present application, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0116] The device of the above embodiment is used to implement the corresponding method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0117] 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 the processor implements the method described in any of the above embodiments when executing the program.

[0118] Figure 4 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. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0119] 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.

[0120] 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.

[0121] 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 in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0122] 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 a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0123] 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).

[0124] 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.

[0125] The electronic device of the above embodiment is used to implement the corresponding method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0126] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments, 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 described in any of the above embodiments.

[0127] The 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 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 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.

[0128] The computer instructions stored in the storage medium of the above embodiments are used to enable the computer to execute the method described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0129] 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 described in any of the above embodiments, which has the beneficial effects of the corresponding method embodiments and will not be repeated here.

[0130] 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.

[0131] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation 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 (e.g., circuits) to describe 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.

[0132] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.

[0133] 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 startup control method for a pumped storage power station unit, characterized in that: Applied to the control system of a pumped storage power station, comprising: a target unit and an auxiliary unit connected together through a busbar, the target unit comprising: a target neutral point switch, a target excitation system, a target dragged switch, a target commutation switch and a target export switch, the auxiliary unit comprising: an auxiliary neutral point switch, an auxiliary excitation system, an auxiliary drag switch, an auxiliary commutation switch and an auxiliary export switch; The method comprises: The auxiliary unit disconnects the auxiliary neutral point switch; The target unit began to apply mechanical brakes; The auxiliary unit separates the auxiliary commutation switch and closes the auxiliary drag switch, and the target unit closes the target commutation switch and closes the target dragged switch; The auxiliary excitation system of the auxiliary unit is set to a back-to-back drag mode, and the target excitation system of the target unit is set to a back-to-back drag mode; The auxiliary unit began to apply mechanical brakes; After the auxiliary unit determines that the speed and voltage of the target unit are both zero, the synchronization device is started and the auxiliary outlet switch is closed; After the target unit determines that the auxiliary outlet switch is normally closed, the inflation and water pressure process is performed to adjust the speed governor of the target unit to the phase adjustment mode; When the target unit determines that the ball valve of the auxiliary unit is partially opened and the inflation and water pressure process is completed, the mechanical brake is released, and the auxiliary excitation system and the target excitation system are controlled to be opened and put into use; After the auxiliary unit determines that the auxiliary excitation system and the target excitation system are put into use, the auxiliary unit performs the mechanical brake release; When the target unit determines that the speed proportion of the target unit is greater than the first predetermined speed proportion, and the terminal voltage proportion of the target unit is greater than the predetermined voltage proportion, the target unit switches on the target outlet switch; After the auxiliary unit determines that the target outlet switch is closed, separate the auxiliary outlet switch and the auxiliary drag switch to start the shutdown process; After the target unit determines that the auxiliary outlet switch of the auxiliary unit is separated, the target dragged knife switch is separated. At this time, the target unit is successfully started and operates in a phase adjustment state.

2. The method according to claim 1, characterized in that The target unit further includes: a target protection system, and the auxiliary unit further includes: an auxiliary protection system, wherein the auxiliary protection system and the auxiliary excitation system are simultaneously set to a back-to-back drag mode; After the auxiliary unit determines that the speed and voltage of the target unit are both zero, the synchronization device is started, and before the auxiliary outlet switch is closed, the method further includes: The target unit determines whether the states of the target neutral point switch, the target commutation switch, the target drag switch and the target outlet switch are normal, and determines whether the state of the target excitation system is normal, and determines whether the state of the target protection system is normal; The auxiliary unit determines whether the status of the auxiliary neutral point switch, auxiliary phase-changing switch, auxiliary drag switch and auxiliary output switch is normal, whether the status of the auxiliary excitation system is normal, and whether the status of the auxiliary protection system is normal; After the target unit is determined to be all normal and the auxiliary unit is determined to be all normal, the auxiliary unit obtains the speed and voltage of the target unit for judgment.

3. The method according to claim 1, characterized in that The step of determining that the ball valve of the auxiliary unit is partially opened in the target unit includes: The auxiliary unit opens the auxiliary unit ball valve. After the auxiliary unit ball valve is controlled to open 40%, the target unit determines whether the auxiliary unit ball valve has completed the 40% opening. If so, it determines that the auxiliary unit ball valve is partially opened.

4. The method according to claim 1, characterized in that: After the auxiliary unit performs the mechanical brake release, the method further comprises: The speed governor of the auxiliary unit is adjusted to the power generation mode, and the guide vanes of the auxiliary unit are opened to increase the guide vane speed.

5. The method according to claim 4, characterized in that After the speed governor of the auxiliary unit is adjusted to the power generation mode and the guide vanes of the auxiliary unit are opened to increase the guide vane speed, the method further includes: Determine the rotational speed of the auxiliary unit and the rotational speed of the target unit. When the difference between the rotational speed of the auxiliary unit and the rotational speed of the target unit is greater than or equal to the second predetermined rotational speed, it is determined that an electrical accident occurs in the auxiliary unit and the target unit, and both the auxiliary unit and the target unit execute a shutdown process.

6. The method according to claim 5, characterized in that The second predetermined rotation speed accounts for 10%.

7. The method according to claim 1, characterized in that When the target unit determines that the rotation speed proportion of the target unit is greater than the first predetermined rotation speed proportion, and the terminal voltage proportion of the target unit is greater than the predetermined voltage proportion, the target unit switches on the target outlet switch, including: When the target unit determines that the speed proportion of the target unit is greater than 95% and the terminal voltage proportion of the target unit is greater than 80%, the target unit will determine whether the voltage and frequency on both sides of the target outlet switch are equal, and whether the phase sequence and phase are the same; When the target unit determines that the voltage and frequency on both sides of the target outlet switch are equal, and the phase sequence and phase are the same, it closes the target outlet switch.

8. A pumped storage power station control system, characterized in that: include: The target unit and the auxiliary unit are connected together through a busbar, the target unit includes: a target neutral point switch, a target excitation system, a target dragged switch, a target commutation switch and a target outlet switch, and the auxiliary unit includes: an auxiliary neutral point switch, an auxiliary excitation system, an auxiliary drag switch, an auxiliary commutation switch and an auxiliary outlet switch; An auxiliary unit, configured to separate the auxiliary neutral point switch; The target unit is configured to start applying mechanical brakes; The auxiliary unit is configured to separate the auxiliary commutation knife switch and close the auxiliary drag knife switch, and the target unit is configured to close the target commutation knife switch and close the target drag knife switch; The auxiliary unit is configured to set the auxiliary excitation system to a back-to-back drag mode, and the target unit is configured to set the target excitation system to a back-to-back drag mode; The auxiliary unit is configured to start applying mechanical brakes; The auxiliary unit is configured to start the synchronization device and close the auxiliary outlet switch after determining that the speed and voltage of the target unit are both zero; The target unit is configured to perform an air-filling and water-pressurizing process to adjust the speed governor of the target unit to a phase-adjusting mode after determining that the auxiliary outlet switch is normally closed; The target unit is configured to perform mechanical brake release after determining that the ball valve of the auxiliary unit is partially opened and the air and water pressure process is completed, and control the auxiliary excitation system and the target excitation system to be opened and put into use; The auxiliary unit is configured to execute a mechanical brake after the auxiliary excitation system and the target excitation system are determined to be in use; The target unit is configured to turn on the target output switch of the target unit when the rotation speed ratio of the target unit is greater than the first predetermined rotation speed ratio and the terminal voltage ratio of the target unit is greater than the predetermined voltage ratio; The auxiliary unit is configured to separate the auxiliary outlet switch and the auxiliary drag knife switch after determining that the target outlet switch is closed, and start the shutdown process; The target unit is configured to separate the target dragged knife switch after determining that the auxiliary outlet switch of the auxiliary unit is separated. At this time, the target unit is successfully started and operates in a phase adjustment state.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method according to any one of claims 1 to 7 is implemented.

10. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 7.

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