A method for pumping phase modulation starting and pumped storage unit

Abstract

The application provides a pumping phase modulation starting method and a pumped storage unit, and relates to the technical field of pumped storage; a specific technical scheme is as follows: information interaction is performed between a driving machine and a driven machine to realize that the driving machine drives the driven machine to start pumping phase modulation; firstly, a loop between the driving machine and the driven machine is closed to establish electrical connection; then, excitation is synchronously input, the driving machine is accelerated, the driven machine is immediately accelerated in response to the rotating magnetic field of the driving machine to drive the driven machine to synchronously rotate, and when the rotating speed of the driven machine reaches a preset rotating speed threshold, synchronization and grid connection are performed to enter a stable operation state of pumping phase modulation. The scheme can improve the operation synchronization between the driving machine and the driven machine, effectively improve the success rate of back-to-back driving pumping phase modulation starting, shorten the starting time, and prevent equipment damage.

Description

Technical Field

[0001] This application relates to the field of pumped storage technology, and in particular to a pumped phase-adjustment start-up method and a pumped storage unit. Background Technology

[0002] Pumped storage units need to quickly enter the pumping phase regulation mode to provide voltage support to the power grid during startup. Back-to-back driving method for pumping phase regulation startup is a typical startup method for pumped storage units.

[0003] Back-to-back operation refers to a process where one unit acts as the driven unit in the pumping phase-shifting startup procedure, while the other unit acts as the driving unit in the power generation procedure. Specifically, the driving unit sends a variable frequency current with a gradually increasing frequency to the driven unit, causing the driven unit to generate a rotating magnetic field with a synchronously increasing frequency. Under the action of the variable frequency rotating magnetic field, the rotor of the driven unit gradually accelerates to its rated speed and is simultaneously connected to the grid, thus achieving the pumping phase-shifting operation.

[0004] The back-to-back start-up process of pumped storage units involves numerous devices in both units, requiring coordination and synchronization between them. However, existing technologies for back-to-back start-up of pumped storage units suffer from problems such as improper signal exchange between units and asynchronous startup and operation of related equipment. This leads to slow or unsuccessful start-up of the back-to-back pumped phase adjustment process, or even damage to the units. Summary of the Invention

[0005] This application provides a pumping phase-adjustment start-up method and a pumped storage unit, which can enable the equipment to rotate synchronously, improve the success rate of back-to-back pumping phase-adjustment start-up, shorten the start-up time, and save production resources.

[0006] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0007] Firstly, a pumped-storage phase-shifting start-up method is provided, applied to a pumped-storage system including a control terminal and multiple pumped-storage units. The method is applied to the first unit among the multiple pumped-storage units. The method includes: the first unit receiving a first back-to-back drive start-up command from the control terminal; wherein the first back-to-back drive start-up command instructs the first unit to act as the driven unit, with the second unit among the multiple pumped-storage units acting as the driven unit, to perform pumped-storage phase-shifting start-up in a back-to-back drive mode; the first unit starts a thrust high-pressure oil jacking DC pump test, and if both the thrust high-pressure oil jacking DC pump tests of the first and second units are normal, the relevant auxiliary systems of the unit are started, and the main transformer water supply valve is switched from no-load to load; the first unit determines that the first unit and the second unit are connected via a bus... Line connection; the first unit sets the operating status of multiple devices in the first unit; the setting of the operating status of multiple devices in the first unit includes: closing the pumping direction phase reversal isolation switch, closing the unit start isolation switch, switching the governor operating condition selection solenoid valve to the pumping condition position, setting the excitation to back-to-back drive mode, setting the unit protection device to pumping phase adjustment mode, opening the upper and lower leak-proof ring cooling water supply valves, setting the governor to phase adjustment mode, setting the governor to water pump start mode, and engaging mechanical braking; after the first unit closes the outlet circuit breaker (Generator Circuit Breaker, GCB) of the second unit and the operating status of multiple devices in the first unit is set, the first unit starts the air-pressurization water sub-process and the pressurization water holding program, and instructs the second unit to open the water inlet valve; the second unit's GCB closes after the first unit's start isolation switch is closed; after the first unit opens the water inlet valve of the second unit to the preset intermediate opening degree, the mechanical braking is disengaged and the driven machine excitation is engaged. After the first unit disengages its mechanical brake and engages the driven turbine excitation, it sends an acceleration command to the second unit. The acceleration command instructs the second unit to disengage its mechanical brake, engage the driven turbine excitation, and start the speed governor to drive the first unit to start pumping phase regulation in the driven turbine excitation mode.

[0008] In this scheme, the first and second generating units interact via information exchange, enabling synchronized operation of the equipment before both units begin to rotate. The excitation of the first generating unit is activated first, followed by the excitation of the second generating unit, which then disengages its mechanical brake. This ensures that the second generating unit drives the first generating unit to rotate synchronously when it begins to rotate. This improves the synchronization between the generating units, shortens start-up time, and effectively increases the success rate of back-to-back pumping phase-adjustment start-up.

[0009] In one possible implementation of the first aspect, after the first unit sends an acceleration command to the second unit, the method further includes: the first unit, in the driven motor excitation mode, accelerates in response to the rotating magnetic field of the second unit, and when the motor speed of the first unit reaches a preset speed threshold, sets the excitation automatic voltage regulator (AVR) mode and engages the synchronization circuit; after the relevant parameters of the motor match the grid, the first unit automatically synchronizes and connects to the grid, closes the first unit's GCB, and notifies the second unit; wherein the relevant parameters of the motor include voltage, frequency, and phase; after the second unit's GCB is disconnected, the first unit disconnects the starting isolation switch of the first unit, resets the synchronization device and circuit of the first unit, and resets the back-to-back drive mode of the first unit; wherein the second unit's GCB is disconnected after the first unit's GCB is closed; the first unit enters the pumping phase adjustment operation mode.

[0010] After the second unit accelerates, the first unit accelerates synchronously in response to the rotating magnetic field of the second unit. This reduces the waiting and adjustment process caused by the equipment not rotating at the same time, and speeds up the entire pumping and phasing start-up process. The first unit is connected to the grid synchronously after reaching the preset speed threshold, which avoids the impact of asynchronous grid connection and improves safety.

[0011] In another possible implementation of the first aspect, the aforementioned first back-to-back towing start command includes the unit identifier of the second unit. The method further includes: the first unit, in response to receiving the first back-to-back towing start command, sending a towing start command to the second unit; wherein the towing start command instructs the second unit to initiate a thrust high-pressure oil jacking DC pump test; the first unit receives a first feedback signal from the second unit; wherein the first feedback signal indicates that the thrust high-pressure oil jacking DC pump test of the second unit is normal.

[0012] After the pumped storage unit passes the thrust high-pressure oil jacking DC pump test, it can spray high-pressure oil onto the thrust bearing surface during unit startup and shutdown, forming a high-pressure static oil film to avoid wear during unit rotation and prevent equipment damage.

[0013] In another possible implementation of the first aspect, after the first unit sends the motor start command to the second unit, the method further includes: the first unit receiving a motor start signal from the second unit; wherein the motor start signal is used to indicate that the second unit has started.

[0014] The first unit receives a start signal from the second unit's drive motor, enabling the first unit to know the execution result of the start command and avoid misjudgment or repeated operation due to the inability to confirm the execution status.

[0015] In another possible implementation of the first aspect, after the first unit starts the thrust high-pressure oil jacking DC pump test, the method further includes: the first unit sending a second feedback signal to the second unit; wherein the second feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the first unit is normal.

[0016] After the first unit reports to the second unit that the high-pressure oil lifting DC pump test of the first unit is normal, the second unit can then carry out subsequent operations to provide safe conditions for system operation and avoid equipment damage such as dry friction of the thrust bearing due to failure of the high-pressure oil lifting DC pump.

[0017] In another possible implementation of the first aspect, the first unit is determined to be connected to the second unit via a bus, including: if there are other pumped-storage units between the first and second units, the first unit sends a control command to the common LCU of the units, the control command instructing the common LCU to close the bus connection switch between the first and second units. After the common LCU closes the bus connection switch, the first unit sets the operating status of multiple devices within the first unit. After resetting the back-to-back drive mode of the first unit, the method further includes: the first unit disconnecting the start bus connection switch between the first and second units.

[0018] Starting the bus tie switch allows the first and second generating units to connect via the bus. During the rotation of the second generating unit, the variable frequency stator current generated can be transmitted to the stator of the first generating unit through the starting bus, causing the rotating magnetic field generated by the first generating unit to drive the rotor of the second generating unit. This allows the rotating magnetic field generated after the first generating unit is put into operation to directly act on the second generating unit through the stator current, enabling the second generating unit to quickly establish synchronous rotation conditions and shortening the start-up time.

[0019] In another possible implementation of the first aspect, after the first unit sets the operating status of multiple devices in the first unit, the method further includes: the first unit sending a third feedback signal to the second unit; wherein the third feedback signal is used to indicate that the start-up isolation switch of the first unit has been closed.

[0020] The closing of the starting isolating switch for the first unit establishes an electrical connection path, ensuring the integrity of the starting circuit and providing the necessary power supply for the start-up of the first unit. It also provides a safe environment for the starting operation, preventing electrical accidents such as arcing and short circuits.

[0021] In another possible implementation of the first aspect, the method further includes: the first unit receiving a fourth feedback signal from the second unit; wherein the fourth feedback signal is used to indicate that the GCB of the second unit has been closed.

[0022] The second unit's GCB closes first, then triggers the driven motor's air-pressurization and water-holding sub-process and water-holding procedure. This prevents startup failure or equipment malfunction caused by starting the air-pressurization and water-holding sub-process and water-holding procedure when the power supply is not established.

[0023] In another possible implementation of the first aspect, the method further includes: after the GCB of the second unit is closed, the first unit sends an inlet valve opening command to the second unit; wherein the inlet valve opening command is used to instruct the second unit to open the inlet valve of the second unit; the first unit receives a fifth feedback signal from the second unit; wherein the fifth feedback signal is used to feed back the inlet valve of the second unit to a preset intermediate opening degree.

[0024] By opening the inlet valve of the second unit to a preset intermediate opening and then increasing the speed, the second unit can output a sufficiently large initial electromagnetic torque, allowing the first and second units to maintain the same speed. The intermediate opening allows the speed governor to enter a closed loop, and the speed smoothly increases to the preset speed threshold, ensuring that the entire process is both fast and stable.

[0025] In another possible implementation of the first aspect, after the first unit sends an acceleration command to the second unit, the method further includes: the first unit receiving speed information from a speed sensor; wherein the speed information is used to provide feedback that the motor speed of the first unit has reached a preset speed threshold.

[0026] Once the first generating unit receives an indication that the motor speed has reached the preset speed threshold, it can proceed with the subsequent grid connection operation. This avoids the problem of impacting the power grid system and damaging the generating unit equipment if the grid connection operation is performed before the required speed is reached.

[0027] In another possible implementation of the first aspect, after the first unit closes its GCB, the method further includes: the first unit sending a sixth feedback message to the second unit; wherein the sixth feedback message is used to indicate that the first unit's GCB has been closed. The second unit (i.e., the driven unit) then stops after the first unit (i.e., the driven unit) closes its GCB, ensuring that the driven unit is connected to the grid and stable before stopping, thus avoiding power backflow or mechanical shock.

[0028] In another possible implementation of the first aspect, after the first unit disconnects the GCB of the second unit, the method further includes: the first unit receiving a seventh feedback signal from the second unit; wherein the seventh feedback signal is used to indicate that the GCB of the second unit has been disconnected.

[0029] The GCB disconnection feedback signal of the second unit can instruct the first unit to perform subsequent operations. Disconnecting the unit start isolation switch and the bus tie switch can eliminate the risk of reverse power transmission. Resetting the synchronization device and circuit can avoid the impact caused by asynchronous grid connection. Then, it enters the steady-state operation of pumping phase adjustment.

[0030] Secondly, a pumped-storage phase-shifting start-up method is provided, applied to a pumped-storage system. This system includes a control terminal and multiple pumped-storage units. The method is applied to the second unit among the multiple pumped-storage units. The method includes: the second unit receiving a drive motor start-up command from the first unit, starting a thrust high-pressure oil jacking DC pump test, and, if both the thrust high-pressure oil jacking DC pump tests of the first and second units are normal, starting the unit's relevant auxiliary systems; wherein, the drive motor start-up command is sent by the first unit after receiving a first back-to-back drive start-up command from the control terminal, the first back-to-back drive start-up command instructing the first unit to act as the driven unit, with the second unit among the multiple pumped-storage units acting as the drive motor, to perform pumped-storage phase-shifting start-up in a back-to-back drive mode; and, with the second unit and the first unit connected via a busbar, setting the operating status of multiple devices in the second unit; wherein, setting the operating status of the second unit... The operating states of multiple devices in the group include: closing the drive disconnect switch, opening the unit neutral point disconnect switch, switching the governor operating condition selection solenoid valve to the generator operating condition position, setting the excitation to back-to-back drive mode, setting the governor to back-to-back drive mode, opening the governor hydraulic circuit emergency stop solenoid valve, and engaging the mechanical brake; after the drive disconnect switch of the first unit is closed, the second unit closes the second unit's GCB; in response to the instruction of the first unit, the second unit opens its water inlet valve; the second unit receives the speed-up command from the first unit, exits the mechanical brake, engages the drive excitation start governor, and drives the first unit to start pumping phase adjustment in the driven motor excitation mode; wherein, the speed-up command is sent by the first unit after the second unit's water inlet valve is opened to a preset intermediate opening; after the first unit's GCB is closed, the second unit stops the second unit's governor, disconnects the second unit's GCB, and continues to execute subsequent shutdown steps.

[0031] In this scheme, the first and second units can achieve synchronous excitation through information exchange, thereby driving the two units to rotate synchronously. This improves the synchronization between the units, effectively increases the success rate of back-to-back pumping phase-adjustment startup, and shortens the startup time. The second unit first opens its inlet valve to a preset intermediate opening before accelerating, allowing the drive motor to output a sufficiently large initial electromagnetic torque, keeping both units at the same speed. The intermediate opening allows the speed governor to enter a closed loop, smoothly increasing the speed to the preset speed threshold, ensuring the entire process is both fast and stable.

[0032] In one possible implementation of the second aspect, before the aforementioned test of starting the thrust high-pressure oil jacking DC pump, the method further includes: the second unit receiving a second back-to-back drag start command from the control terminal; wherein the second back-to-back drag start command is used to instruct the second unit as the tractor to drag the first unit as the driven unit in a back-to-back drag manner to start; wherein the second back-to-back drag start command includes the unit identifier of the first unit.

[0033] The second back-to-back start command instructs the first unit to be the driven unit and the second unit to be the driven unit. The second unit, acting as the driven unit, pulls the first unit, which is the driven unit, to start in a back-to-back manner. This enables the functional role configuration of the two units, transforming them from independent operations into a coordinated and communicative unit, thus laying the foundation for subsequent communication and collaboration between the units.

[0034] In another possible implementation of the second aspect, after the second unit receives the motor start command from the first unit, the method further includes: the second unit sending a motor start signal to the first unit; wherein the motor start signal is used to indicate that the second unit has started.

[0035] The second unit sends a signal that the drive unit has started to the first unit, which enables the first unit to receive feedback that the unit has started, thus avoiding misjudgment or repeated operation caused by the first unit's inability to confirm the execution status.

[0036] In another possible implementation of the second aspect, after the thrust high-pressure oil jacking DC pump test is initiated, the method further includes: the second unit sending a first feedback signal to the first unit; wherein the first feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the second unit is normal; the second unit receiving a second feedback signal from the first unit; wherein the second feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the first unit is normal.

[0037] After the second unit receives the feedback signal that the high-pressure oil jacking DC pump of the first unit has passed the test, subsequent operations can provide safe conditions for system operation and avoid equipment damage such as dry friction of the thrust bearing due to failure of the high-pressure oil jacking DC pump.

[0038] In another possible implementation of the second aspect, the method further includes: the second unit receiving a third feedback signal from the first unit; wherein the third feedback signal is used to indicate that the start-up isolation switch of the first unit has been closed.

[0039] The closing of the starting isolating switch for the first unit establishes an electrical connection path, ensuring the integrity of the starting circuit and providing the necessary power supply for the start-up of the first unit. It also provides a safe environment for the starting operation, preventing electrical accidents such as arcing and short circuits.

[0040] In another possible implementation of the second aspect, the method further includes: the second unit sending a fourth feedback signal to the first unit; wherein the fourth feedback signal is used to indicate that the GCB of the second unit has been closed.

[0041] The second unit's GCB closes first, then triggers the first unit's air-pressurization and pressurization water holding procedures. This provides power assurance for the first unit, preventing startup failure or equipment malfunction if the air-pressurization and pressurization water holding procedures are not started before power is available.

[0042] In another possible implementation of the second aspect, the method further includes: the second unit receiving an inlet valve opening command from the first unit; wherein the inlet valve opening command is sent by the first unit after the GCB of the second unit is closed, and the inlet valve opening command is used to instruct the second unit to open the inlet valve of the second unit; the second unit sending a fifth feedback signal to the first unit; wherein the fifth feedback signal is used to feed back the inlet valve of the second unit to a preset intermediate opening degree.

[0043] By opening the inlet valve of the second unit to a preset intermediate opening and then increasing the speed, the second unit can output a sufficiently large initial electromagnetic torque, allowing the first and second units to maintain the same speed. The intermediate opening allows the speed governor to enter a closed loop, and the speed smoothly increases to the preset speed threshold, ensuring that the entire process is both fast and stable.

[0044] In another possible implementation of the second aspect, after receiving the speed-up command from the first unit, the method further includes: the second unit responding to the speed-up command to increase its speed and receiving speed information from the speed sensor; wherein the speed information is used to provide feedback that the motor speed of the second unit has reached a preset speed threshold.

[0045] The second unit accelerates, driving the first unit to synchronously accelerate to the preset speed before performing subsequent grid connection operations. This avoids the problem of the first unit failing to reach the required speed before performing grid connection operations, which could impact the power grid system and damage the unit equipment.

[0046] In another possible implementation of the first aspect, after the second unit closes the GCB of the first unit, the method further includes: the second unit receiving a sixth feedback signal from the first unit; wherein the sixth feedback signal is used to indicate that the GCB of the first unit has been closed.

[0047] The drive motor stops only after receiving the closed GCB from the driven motor. This ensures that the driven motor is connected to the grid and stable. Only then does the drive motor stop, which can avoid power backflow or mechanical shock.

[0048] In another possible implementation of the second aspect, after disconnecting the GCB of the second unit, the method further includes: the second unit sending a seventh feedback signal to the first unit; wherein the seventh feedback signal is used to indicate that the GCB of the second unit has been disconnected.

[0049] The GCB disconnection feedback signal of the second unit can instruct the first unit to perform subsequent operations. Disconnecting the unit start isolation switch and the bus tie switch can eliminate the risk of reverse power transmission. Resetting the synchronization device and circuit can avoid the impact caused by asynchronous grid connection. Then, it enters the steady-state operation of pumping phase adjustment.

[0050] Thirdly, a pumping phase-adjusting start-up device is provided, which corresponds to the first unit. The pumping phase-adjusting start-up device includes: a receiving module, a first start-up module, a first setting module, a second start-up module, and a synchronous rotation module.

[0051] The receiving module is used to receive a first back-to-back drag start command from the control terminal; wherein, the first back-to-back drag start command is used to instruct the first unit as the driven unit and the second unit among multiple pumped storage units as the driven unit to start pumping phase adjustment in a back-to-back drag mode.

[0052] The first startup module is used to start the thrust high-pressure oil jacking DC pump test, and after the thrust high-pressure oil jacking DC pump tests of the first unit and the second unit are normal, it starts the relevant auxiliary systems of the unit and switches the main transformer water supply valve from no-load to load; the first unit determines that the first unit and the second unit are connected through the bus.

[0053] The first setting module is used to set the operating status of multiple devices in the first unit. Setting the operating status of multiple devices in the first unit includes: closing the pumping direction phase reversal isolation switch, closing the unit start isolation switch, switching the governor operating condition selection solenoid valve to the pumping operating condition position, setting the excitation to back-to-back drag mode, setting the unit protection device to pumping phase adjustment mode, opening the upper and lower leak-proof ring cooling water supply valves, setting the governor to phase adjustment mode, setting the governor to water pump start mode, and engaging the mechanical brake.

[0054] The second start-up module is used to start the air-pressurization sub-process and pressurization holding program and instruct the second unit to open the inlet valve after the GCB of the second unit is closed; wherein, the GCB of the second unit is closed after the start-up isolation switch of the first unit is closed.

[0055] The synchronous rotation module is used to instruct the first unit to disengage its mechanical brake and engage the driven turbine's excitation after the inlet valve of the second unit opens to a preset intermediate opening. After the first unit disengages its mechanical brake and engages the driven turbine's excitation, it sends an acceleration command to the second unit. The acceleration command instructs the second unit to disengage its mechanical brake, engage the driven turbine's excitation, and start the speed governor to drive the first unit to start pumping phase regulation in the driven turbine's excitation mode.

[0056] Fourthly, a pumping phase-adjusting starting device is provided, which includes: a receiving module, a starting module, a first setting module, a control module, and an excitation speed regulation module.

[0057] The receiving module is used to receive the start command of the drive motor from the first unit.

[0058] The start-up module is used to start the thrust high-pressure oil jacking DC pump test, and to start the relevant auxiliary systems of the unit after the thrust high-pressure oil jacking DC pump tests of the first unit and the second unit are normal. The drive motor start command is sent by the first unit after receiving the first back-to-back drive start command from the control terminal. The first back-to-back drive start command is used to instruct the first unit to act as the driven motor and the second unit among multiple pumped storage units to act as the drive motor to start pumping phase adjustment in a back-to-back drive mode.

[0059] The first setting module is used to set the operating status of multiple devices in the second unit when the second unit is connected to the first unit via a busbar. Setting the operating status of multiple devices in the second unit includes: closing the drive disconnect switch, opening the unit neutral point disconnect switch, switching the governor operating condition selection solenoid valve to the generator operating condition position, setting the excitation to back-to-back drive mode, setting the governor to back-to-back drive mode, opening the governor hydraulic circuit emergency stop solenoid valve, and engaging the mechanical brake.

[0060] The control module is used to close the GCB of the second unit after the drive isolating switch of the first unit is closed; and to open the inlet valve of the second unit in response to the instruction of the first unit.

[0061] The excitation speed control module is used to receive the speed-up command from the first unit, disengage the mechanical brake, and engage the drive excitation start speed controller to drive the first unit to start pumping phase adjustment in the driven unit excitation mode; wherein, the speed-up command is sent by the first unit after the water inlet valve of the second unit is opened to the preset intermediate opening degree.

[0062] The control module is also used to, after the GCB of the first unit is closed, to stop the governor of the second unit, disconnect the GCB of the second unit, and continue to execute the subsequent shutdown procedures.

[0063] Fifthly, a pumped-storage unit is provided, which is the first unit among a plurality of pumped-storage units. The first unit, as the driven unit, is started by a second unit among the plurality of pumped-storage units as the driven unit in a back-to-back driven mode. The first unit includes: a memory and at least one processor, and also includes related devices / equipment for pumping phase-adjustment starting in the pumped-storage unit. The memory is communicatively connected to the processor; the memory is used to store computer program code, which includes computer instructions; when the processor executes the computer instructions, it causes the first unit to perform the method as described in the first aspect and any possible implementation thereof.

[0064] Sixthly, a pumped-storage unit is provided, which is the second unit among a plurality of pumped-storage units. The second unit acts as a drive unit, driving the first unit (which is the driven unit) in a back-to-back drive mode to start. The second unit includes a memory and at least one processor, and also includes related devices / equipment for pumping and phase-shifting startup within the pumped-storage unit. The memory is communicatively connected to the processor; the memory stores computer program code, including computer instructions; when the processor executes the computer instructions, it causes the second unit to perform the method described in the second aspect and any possible implementation thereof.

[0065] In a seventh aspect, embodiments of this application provide a computer-readable storage medium storing computer instructions. When executed by a processor, these computer instructions are used to implement methods as described in the first aspect or the second aspect, and any possible implementation thereof.

[0066] Eighthly, embodiments of this application provide a computer program product that, when running on a computer / executed by a computer's processor, implements a method as described in the first aspect or the second aspect, or any possible design thereof. The computer may be a first unit in the first aspect and any possible implementation thereof, or a second unit in the second aspect and any possible implementation thereof.

[0067] Understandably, the beneficial effects that can be achieved by the pumping phase-regulating start-up device of the third and fourth aspects, the pumped storage unit of the fifth and sixth aspects, the computer-readable storage medium of the seventh aspect, and the computer program product of the eighth aspect can be referred to as the beneficial effects of the first and second aspects and any possible implementation thereof, which will not be repeated here. Attached Figure Description

[0068] Figure 1 A schematic diagram of a pumped storage system provided in an embodiment of this application;

[0069] Figure 2An electrical connection diagram of a drive machine and a driven machine provided for an embodiment of this application;

[0070] Figure 3 This application provides a schematic flowchart of a pumping phase adjustment start-up method.

[0071] Figure 4 A schematic diagram of an interface for selecting a driving machine and a driven machine, provided for an embodiment of this application;

[0072] Figure 5 A schematic diagram of a pumping phase-adjusting start-up device provided in an embodiment of this application;

[0073] Figure 6 A schematic diagram of another pumping phase-adjusting start-up device provided in an embodiment of this application;

[0074] Figure 7 This is a schematic diagram of the internal structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0075] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this embodiment, unless otherwise stated, "a plurality of" means two or more.

[0076] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0077] It should be noted that in the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, it does not mean that the applicant has used or necessarily used the solution.

[0078] In addition to using a static frequency converter (SFC) for pumped storage unit pumping phase-shifting startup, a back-to-back drive method can also be used. The so-called back-to-back drive method for pumping phase-shifting startup refers to one unit acting as the driven unit in the pumping phase-shifting startup process, while the other unit acts as the driving unit in the power generation process. An electrical connection can be established between the stators of the driven and driving units. The driving unit sends a variable frequency current with gradually increasing frequency to the driven unit. Responding to the gradually increasing frequency current, the driven unit generates a rotating magnetic field with a synchronously increasing frequency. Under the action of this rotating magnetic field, the rotor of the driven unit gradually accelerates to its rated speed and connects to the grid synchronously, achieving the pumping phase-shifting operation process.

[0079] This application provides a pumped-storage system with phase-adjustment startup method, which can be applied to a pumped-storage system 100. For example... Figure 1 As shown, the pumped storage system 100 includes a control terminal 110 and multiple pumped storage units (such as pumped storage unit 121, pumped storage unit 122, pumped storage unit 123, and pumped storage unit 124).

[0080] In this system, one of the multiple pumped storage units (such as pumped storage unit 124) can act as the driving unit, referred to as the second unit; another pumped storage unit (such as pumped storage unit 122) can act as the driven unit, referred to as the first unit. The second unit, acting as the driving unit, drives the driven unit of the first unit, which acts as the driving unit, to start pumping and phase adjustment in a back-to-back driving manner.

[0081] For example, please refer to Figure 2 It shows a schematic diagram of the electrical connection between a drive machine (i.e., the second unit) 124 and a driven machine (i.e., the first unit) 122 provided in an embodiment of this application.

[0082] Among them, such as Figure 1 As shown, the second unit 124 and the first unit 122 are connected across units, such as the first unit 122 and the second unit 124 being directly connected across the pumped storage unit 123. Therefore, as... Figure 2 As shown, the first unit 122 and the second unit 124 are connected across units via a bus tie switch. Of course, the first unit and the second unit may not need to be connected across units. For example, if... Figure 1 When the pumped storage unit 123 shown is used as the second unit, it does not need to be connected to the first unit 122. If the first unit and the second unit are not connected, they do not need to be connected via the start bus tie switch (not shown in the attached figure).

[0083] like Figure 2As shown, one end of the first unit 122 is grounded through the neutral point disconnect switch -1, and the other end of the first unit 122 is connected to one end of the starting disconnect switch -1 and one end of the first unit's GCB (such as GCB-1). The other end of GCB-1 is connected to one end of the driving disconnect switch -1, and the other end of the driving disconnect switch -1 is connected to the other end of the starting disconnect switch -1 and one end of the starting bus tie switch. The other end of GCB-1 and the end of the driving disconnect switch -1 are also connected in parallel to the generator direction commutation disconnect switch -1 and the pumping direction commutation disconnect switch -1.

[0084] like Figure 2 As shown, one end of the second unit 124 is grounded through the neutral point disconnect switch -2, and the other end of the second unit 124 is connected to one end of the starting disconnect switch -2 and one end of the GCB (such as GCB-2) of the second unit. The other end of GCB-2 is connected to one end of the driving disconnect switch -2, and the other end of the driving disconnect switch -2 is connected to the other end of the starting disconnect switch -2 and the other end of the starting bus tie switch. The other end of GCB-2 and the other end of the driving disconnect switch -2 are also connected in parallel to the generator direction commutation disconnect switch -2 and the pumping direction commutation disconnect switch -2.

[0085] The following combination Figure 1 and Figure 2 This describes the specific method and process for starting up the second unit 124 and the first unit 122 using a back-to-back pumping and phase-adjustment method. For example... Figure 3 As shown, the pumping phase adjustment start-up method may include: S301-S319.

[0086] S301, Control terminal 110 sends a first back-to-back drag start command to the first unit 122.

[0087] The first back-to-back towing start command is used to instruct the first unit 122, as the driven unit, to start pumping water and adjusting phases by the second unit 124, as the driven unit, in a back-to-back towing manner.

[0088] In some embodiments, the first back-to-back towing start command may include a unit identifier for the second unit 124, which serves as the drive unit among two pumped-storage units that are started in a back-to-back towing manner. The unit identifier of the second unit 124 included in the first back-to-back towing start command is used by the first unit 122 to identify which of the plurality of pumped-storage units serves as the drive unit for the first unit 122. Thus, in response to the first back-to-back towing start command, the first unit 122 can send a drive unit start command to the second unit 124 based on the unit identifier of the second unit 124.

[0089] In other embodiments, the aforementioned first back-to-back towing start command may include not only the unit identifier of the second unit 124, which serves as the driving unit among the two pumped-storage units used for back-to-back towing start, but also the unit identifier of the first unit 122, which serves as the driven unit. The unit identifier of the first unit 122 in the first back-to-back towing start command is used by the first unit 122 to determine that it can serve as the driven unit.

[0090] In some embodiments, the first unit 124 as the driving unit and the second unit 122 as the driven unit can be selected by the control terminal 110. Specifically, before S301, the method of this application embodiment may further include: the control terminal selecting the second unit 124 as the driving unit and the first unit 122 as the driven unit among a plurality of pumped storage units.

[0091] like Figure 4 As shown, the control terminal selects unit 124 as the driven unit among multiple pumped storage units, namely the second unit 124; and selects unit 122 as the driven unit among multiple pumped storage units, namely the first unit 122.

[0092] Following S301, the first unit 122 receives the first back-to-back drag start command and can then set the back-to-back drag mode. In this back-to-back drag mode, the first unit 122 can execute the following procedure to interact with the second unit 124 in the back-to-back drag mode for pumping and phase adjustment start-up.

[0093] S302, in response to the first back-to-back towing start command, the first unit 122 sends a towing motor start command to the second unit 124.

[0094] The tractor start command is used to instruct the second unit 124 to start the thrust high-pressure oil jacking DC pump test.

[0095] After receiving the start command from the tractor, Unit S303 and Unit 124 of the second unit start the thrust high-pressure oil jacking DC pump test.

[0096] If the test of the thrust high-pressure oil lifting DC pump of the pumped storage unit is normal, the pumped storage unit can spray high-pressure oil on the surface of the thrust bearing during unit startup and shutdown, forming a high-pressure static oil film to avoid wear during unit rotation.

[0097] In some embodiments, after receiving a drive start command from the first unit 122, the second unit 124 may send a feedback drive start signal to the first unit 122. This drive start signal indicates that the second unit 124 has started, that is, the drive process has started.

[0098] In other embodiments, the control terminal 110 can send back-to-back drag start commands (i.e., first back-to-back drag start commands) not only to the first unit 122, but also to the second unit 124 (i.e., second back-to-back drag start commands). Optionally, such as Figure 3 As shown, prior to S303, the method in this embodiment may further include S301':

[0099] S301', Control terminal 110 sends a second back-to-back drag start command to the second unit 124.

[0100] The second back-to-back drag start command is used to instruct the second unit 124 to act as the tractor and drag the first unit 122 as the driven unit in a back-to-back drag manner to start pumping and adjusting the phase.

[0101] In this embodiment, after receiving the second back-to-back towing start command sent in S301', the second unit 124 can wait to receive a drive start command from the first unit 122; and after receiving the drive start command, it can start the thrust high-pressure oil jacking DC pump test. The second back-to-back towing start command may include the unit identifier of the first unit 122, which is the driven unit. Thus, after receiving the drive start command, the second unit 124 can determine whether the drive start command was sent by the first unit 122, which is the driven unit, as indicated in the second back-to-back towing start command. If so, the second unit 124 can start the thrust high-pressure oil jacking DC pump test; if not, the second unit 124 will not start the thrust high-pressure oil jacking DC pump test.

[0102] In some embodiments, the control terminal 110 can execute S301 and S301' simultaneously. After S301, the first unit 122 can execute S302, and then execute S304 after receiving a drive motor start signal. After S301', the second unit 124 can receive the drive motor start command described in S302 and send a drive motor start signal back to the first unit 122; afterwards, the second unit 124 can execute S303. This application embodiment does not restrict the order in which S303 and S304 are executed. For example, S303 and S304 can be executed simultaneously.

[0103] In this embodiment, steps S303 and S304 are executed simultaneously, and the second unit 124 and the first unit 122 simultaneously start the thrust high-pressure oil jacking DC pump test. Starting the thrust high-pressure oil jacking DC pump test is the first step in the startup process of the second unit 124 and the first unit 122; that is, in this embodiment, the first unit 122 and the second unit 124 can start simultaneously. Simultaneous startup of the first unit 122 and the second unit 124 saves startup time.

[0104] In some embodiments, the first unit 122 does not need to send a drive start command to the second unit 124. The second unit 124 can start the thrust high-pressure oil jacking DC pump test after receiving the second back-to-back drive start command sent in S301′.

[0105] S304, First Unit 122 Start-up Thrust High-Pressure Oil Jacking DC Pump Test.

[0106] In some embodiments, the first unit 122 can execute S304 after executing S302-S303. In this embodiment, S304 can be executed first, followed by S302-S303; or S302-S303 can be executed first, followed by S304; or S303 and S304 can be executed simultaneously. This embodiment does not restrict the execution order of S303 and S304.

[0107] S305. If the thrust high-pressure oil jacking DC pump tests of the first unit 122 and the second unit 124 are normal, start the relevant auxiliary systems of the first unit 122, switch the main transformer water supply valve from no-load to load, and confirm that the first unit 122 and the second unit 124 are connected by the bus.

[0108] In some embodiments, the second unit 124 can send a first feedback signal to the first unit 122 if the thrust high-pressure oil jacking DC pump test is normal. This first feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the second unit 124 is normal. Upon receiving the first feedback signal, the first unit 122 can confirm that the thrust high-pressure oil jacking DC pump test of the second unit 124 is normal.

[0109] In the embodiments of this application, such as Figure 1 As shown, the second unit 124 and the first unit 122 are connected across units. In this case, as... Figure 2As shown, a start-up bus tie switch is installed between the first unit 122 and the second unit 124. In step S305, determining that the first unit 122 and the second unit 124 are connected via the bus may include: the first unit 122 issuing a start-up bus tie switch closing command to the unit's local control unit (LCU). This command includes the identification identifiers of the first unit 122 and the second unit 124, instructing the common LCU to close the bus tie switch between the first and second units. Upon receiving this command, the common LCU closes the start-up bus tie switch between the first unit 122 and the second unit 124 and sends feedback signals indicating that the start-up bus tie switch is closed to both units. The next step is only performed after receiving the feedback signal from the common LCU indicating that the start-up bus tie switch is closed. This ensures the safe operation of the electrical switches related to the start-up bus, protects the unit equipment, and prevents accidents caused by misoperation of the start-up bus switches that could damage the units.

[0110] In other embodiments, it is assumed that Figure 1 The pumped storage unit 123 shown is the second unit, and this second unit does not need to be connected to the first unit 122. If the first unit and the second unit are not connected, it is not necessary to close the start-up bus tie switch between the first unit and the second unit.

[0111] S306. If the thrust high-pressure oil jacking DC pump tests of the first unit 122 and the second unit 124 are both normal, start the relevant auxiliary systems of the second unit 124.

[0112] In some embodiments, the first unit 122 can send a second feedback signal to the second unit 124 if the thrust high-pressure oil jacking DC pump test is normal. This second feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the first unit 122 is normal. Upon receiving the second feedback signal, the second unit 124 can confirm that the thrust high-pressure oil jacking DC pump test of the first unit 122 is normal.

[0113] In this embodiment, S306 can be executed first, followed by S305; or S305 can be executed first, followed by S306; or S305 and S306 can be executed simultaneously. This embodiment does not restrict the execution order of S305 and S306.

[0114] It should be noted that both Unit 122 and Unit 124 will only proceed to the next step (such as starting the relevant auxiliary systems of Unit 122 and Unit 124) after both units have successfully completed the thrust high-pressure oil jacking DC pump tests. It should be understood that if the thrust high-pressure oil jacking DC pump test of one unit is successful, but the test of the thrust high-pressure oil jacking DC pump of the other unit fails, and the unit on this side still proceeds to the next step, resources will be wasted because the other unit cannot cooperate with the unit on this side. In summary, by adopting this scheme, Unit 122 and Unit 124 will only proceed to the next step after both units have successfully completed the thrust high-pressure oil jacking DC pump tests, which reduces resource waste and improves the success rate of pumped storage system pumped phase adjustment startup.

[0115] S307, First unit 122 sets the working status of multiple devices in the first unit 122.

[0116] The above-mentioned settings include the following operating states for multiple components in the first unit 122: closing the pumping direction phase-reversing isolation switch-1, closing the unit start isolation switch-1, switching the governor's operating condition selection solenoid valve to the pumping operating condition position, setting the excitation to back-to-back drive mode, setting the unit protection device to pumping phase-adjustment mode, opening the upper and lower leak-proof ring cooling water supply valves, setting the governor to phase-adjustment mode, setting the governor to water pump start mode, and engaging the mechanical brake. The first unit 122 is set to back-to-back drive mode for excitation; this back-to-back drive mode can also be referred to as the back-to-back drive motor mode.

[0117] S308, Second Unit 124 sets the operating status of multiple devices in the second unit.

[0118] The above-mentioned settings include the working states of multiple devices in the second unit 124, such as: closing the drive isolation switch-2, opening the unit neutral point isolation switch-2, switching the governor operating condition selection solenoid valve to the power generation operating condition position, setting the excitation to back-to-back drive mode, opening the governor hydraulic circuit emergency stop solenoid valve, and engaging the mechanical brake.

[0119] In this embodiment, S307 can be executed first, followed by S308; or S308 can be executed first, followed by S307; or S307 and S308 can be executed simultaneously. This embodiment does not restrict the execution order of S307 and S308.

[0120] S309. After the start-up isolation switch-1 of the first unit 122 is closed, the second unit 124 closes GCB-2.

[0121] In some embodiments, after the first unit 122 closes the start-up isolating switch-1, it can send a third feedback signal to the second unit 124. The third feedback signal is used to indicate that the start-up isolating switch-1 of the first unit 122 has been closed.

[0122] S310, after the GCB-2 of the second unit 124 is closed and the working status of multiple devices in the first unit 122 is set, the first unit 122 starts the air-pressurization sub-process and the pressurization holding program and instructs the second unit 124 to open the water inlet valve.

[0123] The initiation of the air-pressurization process and the pressurization maintenance procedure can ensure that the driven machine (i.e., the first unit 122) can obtain sufficient water pressure and water volume when it starts up, and maintain a certain water pressure level during the operation of the unit, so as to avoid the unit from becoming unstable or damaged due to unstable water pressure.

[0124] It should be noted that since the execution of S310, which initiates the air-charging and pressurized water sub-process and the pressurized water holding procedure, and the subsequent opening of the inlet valve by the second unit 124, both consume a significant amount of oil, water, and gas resources, this solution aims to prevent a process failure on one side from causing a process malfunction while the other side has already wasted oil, water, and gas resources. Before executing S310 and the subsequent S311 operation, this solution simultaneously verifies that the critical operations S307 and S309 have been successfully completed. Only then can the first unit 122 execute S310 to initiate the air-charging and pressurized water sub-process and the pressurized water holding procedure, and instruct the second unit 124 to perform the subsequent operation. This solution avoids the waste of oil, water, and gas resources by the units.

[0125] In some embodiments, after the second unit 124 closes its GCB-2, it can send a fourth feedback message to the first unit 122. This fourth feedback message is used to indicate that the GCB-2 of the second unit 124 has been closed.

[0126] S311, the second unit 124 responds to the instruction of the first unit 122 and opens the water inlet valve.

[0127] S312: After the inlet valve of the first unit 122 is opened to the preset intermediate opening degree, the mechanical brake is disengaged and the driven turbine is energized. After the first unit disengages the mechanical brake and the driven turbine is energized, it sends an acceleration command to the second unit 124.

[0128] It should be noted that in this scheme, after the inlet valve of the second unit 124 is opened to the preset intermediate opening, the first unit first disengages its mechanical brake and engages the driven motor excitation. Only after the mechanical brake of the first unit has disengaged and the excitation is engaged is a speed-up command sent to the second unit 124. Only after receiving the speed-up command can the second unit 124 execute the next operation, disengaging its mechanical brake and engaging its excitation. This ensures that when the second unit 124 begins to creep due to the disengagement of its mechanical brake, the first unit 122 also begins to rotate synchronously due to the established rotating magnetic field. If the inlet valve of the second unit 124 is open and the mechanical brake is disengaged, causing water leakage that impacts the creeping of the unit, and the first unit 122 fails to disengage its mechanical brake in time or its excitation has not yet started, this could lead to an excessively large speed difference between the first unit 122 and the second unit 124 when the rotating magnetic field of the first unit 122 is established, triggering the synchronous overcurrent protection trip of the first unit 122. The aforementioned speed-up command is used to instruct the second unit 124 to disengage from the mechanical brake and engage the drive motor excitation start speed governor, so as to drive the first unit 122 to start pumping phase adjustment in the driven motor excitation mode.

[0129] The process of increasing the speed after the inlet valve reaches a preset intermediate opening allows the second unit 124 to output a sufficiently large initial electromagnetic torque, ensuring that the first unit 122 and the second unit 124 maintain the same speed. The intermediate opening allows the speed controller to enter a closed loop, smoothly increasing the speed to the preset speed threshold, ensuring that the entire process is both fast and stable.

[0130] In some embodiments, after the inlet valve of the second unit 124 opens to a preset intermediate opening degree, a fifth feedback signal can be sent to the first unit 122. This fifth feedback signal is used to indicate that the inlet valve of the second unit has opened to the preset intermediate opening degree.

[0131] S313, Unit 124: Disengage mechanical braking and engage drive motor excitation.

[0132] S314, the second unit 124 issues a generator direction start command to drive the first unit 122 to start pumping phase regulation in the driven motor excitation mode.

[0133] S315. In the driven motor excitation mode, the first unit 122 responds to the rotational magnetic field of the second unit 124 to increase its speed. When the motor speed of the first unit 122 reaches the preset speed threshold, the automatic voltage regulator (AVR) mode is set and the synchronization circuit is activated.

[0134] S316. The first unit 122 automatically synchronizes with the grid, and after the relevant parameters of the motor of the first unit 122 match the grid, the GCB-1 of the first unit 122 is closed and the second unit 124 is notified.

[0135] The relevant parameters of the aforementioned generator include voltage, frequency, and phase.

[0136] S317. After the GCB of the first unit is closed, the governor of the second unit 124 is stopped, the GCB-2 of the second unit 124 is disconnected, and the subsequent stopping steps are continued.

[0137] For example, the second unit 124 can issue a governor shutdown order to shut down the governor of the second unit 124.

[0138] In some embodiments, after the GCB-1 of the first unit 122 is closed, a sixth feedback signal can be sent to the second unit 122. This sixth feedback signal is used to indicate that the GCB-1 of the first unit has been closed.

[0139] S318. After the GCB-2 of the second unit is disconnected, the first unit 122 disconnects the start isolation switch-1 of the first unit 122, resets the synchronization device and circuit of the first unit 122, and resets the back-to-back drive mode of the first unit 122.

[0140] In some embodiments, after the GCB-2 of the second unit 124 is disconnected, a seventh feedback signal can be sent to the first unit 122. This seventh feedback signal is used to indicate that the GCB-2 of the second unit has been disconnected. In other embodiments, such as... Figure 1 As shown, the second unit 124 and the first unit 122 are connected across units. In this case, after S318, the first unit 122 can disconnect the start bus tie switch between the second unit 124 and the first unit 122.

[0141] In other embodiments, it is assumed that Figure 1 The pumped storage unit 123 shown is the second unit, and this second unit does not need to be connected to the first unit 122. In this case, the first unit does not need to disconnect the start bus tie switch.

[0142] S319, Unit 122 has entered the pumping and phase adjustment operation mode.

[0143] This method improves the operational synchronization between the two units through information exchange between the drive and driven units. Both the driven and driven units are simultaneously energized. After the drive unit accelerates, the driven unit immediately responds to the rotating magnetic field of the drive unit and accelerates synchronously, thus driving the driven unit to rotate synchronously. This method reduces the waiting and adjustment time of the units and effectively improves the success rate of back-to-back driven pumping phase-adjustment startup. Furthermore, opening the inlet valve to a middle opening before energizing avoids severe impacts caused by excessive electromagnetic torque, preventing equipment damage.

[0144] This application provides a pumping phase adjustment start-up device, which corresponds to the first unit 122. Figure 5 This is a schematic diagram of a pumping phase-adjusting start-up device 500 provided in an embodiment of this application. Figure 5 As shown, the pumping phase adjustment start device 500 includes: a receiving module 501, a first start module 502, a first setting module 503, a second start module 504, and a synchronous rotation module 505.

[0145] The receiving module 501 is used to receive a first back-to-back drag start command from the control terminal; wherein, the first back-to-back drag start command is used to instruct the first unit as the driven unit and the second unit among the multiple pumped storage units as the driven unit to start pumping phase adjustment in a back-to-back drag mode.

[0146] The first start-up module 502 is used to start the test of the thrust high-pressure oil jacking DC pump, and when the thrust high-pressure oil jacking DC pump tests of the first unit and the second unit are normal, it starts the relevant auxiliary systems of the unit and switches the main transformer water supply valve from no-load to load; the first unit determines that the first unit and the second unit are connected through the bus.

[0147] The first setting module 503 is used to set the working status of multiple devices in the first unit; wherein setting the working status of multiple devices in the first unit includes: closing the pumping direction phase reversal isolation switch, closing the unit start isolation switch, switching the speed governor operating condition selection solenoid valve to the pumping operating condition position, setting the excitation to back-to-back drag mode, setting the unit protection device to pumping phase adjustment mode, opening the upper and lower leak-proof ring cooling water supply valves, setting the speed governor to phase adjustment mode, setting the speed governor to water pump start mode, and engaging the mechanical brake.

[0148] The second start module 504 is used to start the air-pressurization sub-process and the pressurization holding program and instruct the second unit to open the water inlet valve after the GCB of the second unit is closed and the working status of multiple devices in the first unit is set. The GCB of the second unit closes after the start isolation switch of the first unit is closed.

[0149] The synchronous rotation module 505 is used to instruct the first unit to disengage its mechanical brake and engage the driven turbine's excitation after the inlet valve of the second unit is opened to a preset intermediate opening. After the first unit disengages its mechanical brake and engages the driven turbine's excitation, it sends an acceleration command to the second unit. The acceleration command instructs the second unit to disengage its mechanical brake, engage the driven turbine's excitation, and start the speed governor to drive the first unit to start pumping phase regulation in the driven turbine's excitation mode.

[0150] In other embodiments, such as Figure 5As shown, the pumping phase adjustment start-up device 500 may further include: a response module 506, a synchronous grid connection module 507, a reset module 508, and an operation module 509.

[0151] The response module 506 is used to respond to the speed increase of the rotating magnetic field of the second unit in the driven motor excitation mode, and to set the excitation automatic voltage regulator (AVR) mode and engage the synchronization circuit when the generator speed of the first unit reaches the preset speed threshold.

[0152] The synchronous grid connection module 507 is used to automatically synchronize with the grid after the relevant parameters of the motor match the grid, close the GCB of the first unit and notify the second unit; the relevant parameters of the motor include voltage, frequency and phase.

[0153] The reset module 508 is used to disconnect the start isolation switch of the first unit after the GCB of the second unit is disconnected, reset the synchronization device and circuit of the first unit, and reset the back-to-back drive mode of the first unit; wherein, the GCB of the second unit is disconnected after the GCB of the first unit is closed.

[0154] The operation module 509 is used to enter the pumping and phase adjustment operation mode.

[0155] In other embodiments, the first back-to-back drag-and-start command described above includes the unit identifier of the second unit. For example... Figure 5 As shown, the pumping phase adjustment start device 500 may further include: a sending module 510.

[0156] The sending module 510 is used to send a drive motor start command to the second unit in response to receiving the first back-to-back drive start command; wherein the drive motor start command is used to instruct the second unit to start the thrust high-pressure oil jacking DC pump test.

[0157] The aforementioned receiving module 501 is also used to receive a first feedback signal from the second unit; wherein the first feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump of the second unit is tested normally.

[0158] In some other embodiments, the receiving module 501 described above can also be used to receive a drive start signal from the second unit; wherein the drive start signal is used to indicate that the second unit has been started.

[0159] In some other embodiments, the sending module 510 described above can also be used to send a second feedback signal to the second unit; wherein the second feedback signal is used to report that the thrust high-pressure oil jacking DC pump of the first unit is tested normally.

[0160] In other embodiments, such as Figure 5 As shown, the pumping phase adjustment start device 500 may further include a control module 511.

[0161] Control module 511 is used to send control commands to the common LCU of the units when there are other pumped storage units between the first unit and the second unit. The control commands instruct the common LCU to close the bus tie switch between the first unit and the second unit. After the common LCU closes the bus tie switch, the operating status of multiple devices in the first unit is set.

[0162] The aforementioned control module 511 can also be used to disconnect the start bus connection switch between the first unit and the second unit after resetting the back-to-back drag mode of the first unit.

[0163] In other embodiments, the sending module 510 described above can also be used to send a third feedback signal to the second unit after the first unit sets the working status of multiple devices in the first unit; wherein the third feedback signal is used to provide feedback that the start isolation switch of the first unit has been closed.

[0164] In some other embodiments, the receiving module 501 described above can also be used to receive a fourth feedback signal from the second unit; wherein the fourth feedback signal is used to indicate that the GCB of the second unit has been closed.

[0165] In other embodiments, the sending module 510 can also be used to send an inlet valve opening command to the second unit after the GCB of the second unit is closed; wherein the inlet valve opening command is used to instruct the second unit to open the inlet valve of the second unit.

[0166] The aforementioned receiving module 501 can also be used to receive a fifth feedback signal from the second unit; wherein the fifth feedback signal is used to feed back the water inlet valve of the second unit to a preset intermediate opening degree.

[0167] In some other embodiments, the receiving module 501 described above can also be used to receive rotational speed information from a speed sensor; wherein the rotational speed information is used to provide feedback that the motor speed of the first unit has reached a preset rotational speed threshold.

[0168] In some other embodiments, the sending module 510 described above can also be used to send a sixth feedback message to the second unit; wherein the sixth feedback message is used to indicate that the GCB of the first unit has been closed.

[0169] In some other embodiments, the receiving module 501 described above can also be used to receive a seventh feedback information from the second unit; wherein the seventh feedback information is used to indicate that the GCB of the second unit has been disconnected.

[0170] This application provides another pumping phase adjustment start device, which corresponds to the second unit 124. Figure 6A schematic diagram of another pumping phase-adjusting start-up device 600 provided in an embodiment of this application. Figure 6 As shown, the pumping phase adjustment start device 600 includes: a receiving module 601, a start module 602, a first setting module 603, a control module 604, and an excitation speed regulation module 605.

[0171] The receiving module 601 is used to receive the drive motor start command from the first unit.

[0172] The start-up module 602 is used to start the test of the thrust high-pressure oil jacking DC pump, and to start the relevant auxiliary systems of the unit after the thrust high-pressure oil jacking DC pump tests of the first unit and the second unit are normal. The drive motor start command is sent by the first unit after receiving the first back-to-back drive start command from the control terminal. The first back-to-back drive start command is used to instruct the first unit to act as the driven motor and the second unit among the multiple pumped storage units to act as the drive motor to start pumping phase adjustment in a back-to-back drive mode.

[0173] The first setting module 603 is used to set the operating status of multiple devices in the second unit when the second unit is connected to the first unit via a bus. Setting the operating status of multiple devices in the second unit includes: closing the drive disconnect switch, opening the unit neutral point disconnect switch, switching the governor operating condition selection solenoid valve to the generator operating condition position, setting the excitation to back-to-back drive mode, setting the governor to back-to-back drive mode, opening the governor hydraulic circuit emergency stop solenoid valve, and engaging the mechanical brake.

[0174] The control module 604 is used to close the GCB of the second unit after the drive isolating switch of the first unit is closed; and to open the water inlet valve of the second unit in response to the instruction of the first unit.

[0175] The excitation speed control module 605 is used to receive the speed-up command from the first unit, disengage the mechanical brake and engage the drive excitation start speed controller to drive the first unit to start pumping phase adjustment in the driven unit excitation mode; wherein, the speed-up command is sent by the first unit after the water inlet valve of the second unit is opened to the preset intermediate opening degree.

[0176] The control module 604 is also used to, after the GCB of the first unit is closed, to stop the governor of the second unit, disconnect the GCB of the second unit, and continue to execute the subsequent shutdown steps.

[0177] In other embodiments, the receiving module 601 described above can also be used to receive a second back-to-back drag start command from a control terminal; wherein the second back-to-back drag start command is used to instruct the second unit to act as the driving unit and drag the first unit as the driven unit in a back-to-back drag manner to start. The second back-to-back drag start command includes the unit identifier of the first unit.

[0178] In other embodiments, such as Figure 6 As shown, the pumping phase-adjusting start device 600 may further include a sending module 606. The sending module 606 can be used to send a drive start signal to the first unit after the second unit receives the drive start command from the first unit; wherein the drive start signal is used to feedback that the second unit has started.

[0179] In other embodiments, the sending module 606 described above can also be used to send first feedback information to the first unit after the thrust high-pressure oil jacking DC pump test is started; wherein, the first feedback information is used to report that the thrust high-pressure oil jacking DC pump test of the second unit is normal;

[0180] The aforementioned receiving module 601 can also be used to receive a second feedback signal from the first unit; wherein the second feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump of the first unit is functioning normally.

[0181] In some other embodiments, the receiving module 601 described above can also be used to receive a third feedback signal from the first unit; wherein the third feedback signal is used to indicate that the drive isolation switch of the first unit has been closed.

[0182] In other embodiments, the above-described sending module 606 can also be used to send a fourth feedback signal to the first unit; wherein the fourth feedback signal is used to indicate that the GCB of the second unit has been closed.

[0183] In other embodiments, the receiving module 601 described above can also be used to receive a water inlet valve opening command from the first unit; wherein, the water inlet valve opening command is sent by the first unit after the GCB of the second unit is closed, and the water inlet valve opening command is used to instruct the second unit to open the water inlet valve of the second unit.

[0184] The aforementioned sending module 606 can also be used to send a fifth feedback signal to the first unit; wherein the fifth feedback signal is used to provide feedback on the water inlet valve of the second unit to a preset intermediate opening degree.

[0185] In other embodiments, the receiving module 601 described above can also be used after receiving an acceleration command from the first unit.

[0186] The unit responds to an acceleration command to increase speed and receives speed information from a speed sensor; the speed information is used to provide feedback that the motor speed of the second unit has reached a preset speed threshold. In some embodiments, the receiving module 601 can also be used to receive a sixth feedback signal from the first unit after the GCB of the first unit is closed; the sixth feedback signal is used to provide feedback that the GCB of the first unit has been closed.

[0187] In other embodiments, the sending module 606 described above can also be used to send a seventh feedback signal to the first unit after the GCB of the second unit is disconnected; wherein the seventh feedback signal is used to indicate that the GCB of the second unit has been disconnected.

[0188] The pumping phase-adjusting start-up device 500 provided in this application embodiment can execute the method steps corresponding to the first unit 122 in the method shown in the above method embodiment. Its implementation principle and beneficial effects can be referred to the relevant description in the method embodiment, and will not be repeated here. The pumping phase-adjusting start-up device 600 can execute the method steps corresponding to the second unit 124 in the method shown in the above method embodiment. Its implementation principle and beneficial effects can be referred to the relevant description in the method embodiment, and will not be repeated here.

[0189] Furthermore, each module in the aforementioned pumping phase-adjusting start-up device 500 and pumping phase-adjusting start-up device 600 can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0190] In other embodiments, a computer device is provided. This computer device may be a first unit 122 in the above method embodiments, used to execute the method steps performed by the first unit 122 in the above method flow. Alternatively, the computer device may be a second unit 124 in the above method embodiments, used to execute the method steps performed by the second unit 124 in the above method flow.

[0191] The internal structure of this computer device can be as follows: Figure 7 As shown, it includes a processor, memory, input / output interfaces (I / O), and communication interfaces.

[0192] The processor, memory, and input / output interface are connected via a system bus, and the communication interface is also connected to the system bus via the input / output interface. The processor of this computer device provides computing and control capabilities. The memory of this computer device includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database of this computer device is used to store data. The input / output interface of this computer device is used for exchanging information between the processor and external devices. The communication interface of this computer device is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements a pumping phase-adjustment start-up method.

[0193] The display unit of this computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of this computer device can be a touch layer covering the display screen, or buttons, a trackball, or a touchpad set on the casing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0194] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0195] In some embodiments, a computer device includes a memory, a processor, and a communication interface. The communication interface is used to interact with other devices to send and receive data. For example, in this embodiment, the communication interface can specifically be used to send and receive back-to-back start commands, drive motor start commands, drive motor process start feedback signals, thrust high-pressure oil jacking DC pump test normal signals, bus tie switch closing commands, driven motor isolating switch closing feedback signals, drive motor GCB closing feedback signals, drive motor inlet valve opening commands, drive motor inlet valve opening to intermediate opening feedback signals, drive motor speed-up feedback signals, driven motor GCB closing feedback signals, and drive motor GCB opening feedback signals. The memory is used to store computer program code, which includes computer instructions. The computer instructions run in the above-described computer device to implement the method shown in the above-described method embodiments. For example, the memory may include high-speed random access memory (RAM), and may also include non-volatile memory (NVM), such as at least one disk storage device, and may also be a USB flash drive, portable hard drive, read-only memory, disk, or optical disk, etc.

[0196] The processor can be a general-purpose processor, including a Central Processing Unit (CPU), a network processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The processor can also be other general-purpose processors. A general-purpose processor can be a microprocessor or any conventional processor.

[0197] Memory, communication interfaces, and processor communication connections. For example, memory and communication interfaces can connect to the processor via the system bus and communicate with each other. The system bus can be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, an Industry Standard Architecture (ISA) bus, etc. The system bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus.

[0198] Alternatively, the memory can be either standalone or integrated with the processor. When the memory is set up independently, it is connected to the processor via the system bus.

[0199] This application also provides a chip for executing instructions, which is used to execute a pumping phase adjustment start-up method described in the above embodiments.

[0200] This application also provides a computer-readable storage medium storing computer instructions. When the computer instructions are executed by a processor, they are used to implement the technical solution of the pumped-storage unit with phase-shifting startup method described in the above embodiments. Specifically, when the computer instructions are executed by the processor, the pumped-storage unit (such as the first unit 122 or the second unit 124) can execute the technical solution of the pumped-storage unit with phase-shifting startup method described in the above embodiments.

[0201] This application also provides a computer program product, which includes a computer program stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium. When the at least one processor executes the computer program, it can implement the technical solution of the pumping phase adjustment start-up method in the above embodiments.

[0202] The aforementioned computer-readable storage media can be implemented using any type of volatile or non-volatile storage device or a combination thereof. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), etc.

[0203] Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can take many forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). Computer-readable storage media may be any available medium accessible to general-purpose or special-purpose computers.

[0204] An exemplary computer-readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the storage medium. Of course, the computer-readable storage medium can also be a component of the processor. The processor and the computer-readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the computer-readable storage medium can exist as discrete components in an electronic control unit or main control device; this application does not limit this.

[0205] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or modules, and may be electrical, mechanical, or other forms.

[0206] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to implement the solution of this embodiment according to actual needs.

[0207] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one unit. The unit composed of the above modules can be implemented in hardware or in the form of hardware plus software functional units.

[0208] The integrated modules described above, implemented as software functional modules, can be stored in a computer-readable storage medium. These software functional modules, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of this application.

[0209] It should be understood that the steps of the method disclosed in the embodiments of this application can be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor.

[0210] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0211] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification. The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application's patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

[0212] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A method for starting up a pumped water system with phase adjustment, characterized in that, The method is applied to a pumped-storage system, which includes a control terminal and multiple pumped-storage units. The method is applied to a first unit among the multiple pumped-storage units, and includes: The first unit receives a first back-to-back drag start command from the control terminal; wherein, the first back-to-back drag start command is used to instruct the first unit as the driven unit to start pumping phase adjustment in a back-to-back drag mode by the second unit among the plurality of pumped storage units as the driven unit. The first unit starts the thrust high-pressure oil jacking DC pump test, and after the thrust high-pressure oil jacking DC pump tests of the first unit and the second unit are normal, the relevant auxiliary systems of the unit are started, and the main transformer water supply valve is switched from no-load to load; the first unit confirms that the first unit and the second unit are connected by the bus. The first unit sets the operating status of multiple components in the first unit; wherein, setting the operating status of multiple components in the first unit includes: closing the pumping direction phase reversing isolation switch, closing the unit start isolation switch, switching the speed governor operating condition selection solenoid valve to the pumping operating condition position, setting the excitation to back-to-back drag mode, setting the unit protection device to pumping phase adjustment mode, opening the upper and lower leak-proof ring cooling water supply valves, setting the speed governor to phase adjustment mode, setting the speed governor to water pump start mode, and engaging the mechanical brake; After the GCB of the second unit is closed and the working status of multiple devices in the first unit is set, the first unit starts the air-pressurization water sub-process and the water-pressurization holding program and instructs the second unit to open the water inlet valve; wherein, the GCB of the second unit closes after the start isolation switch of the first unit is closed; After the water inlet valve of the second unit is opened to a preset intermediate opening, the first unit disengages the mechanical brake and engages the driven motor for excitation. After the first unit disengages its mechanical brake and engages the driven turbine excitation, it sends an acceleration command to the second unit. The acceleration command instructs the second unit to disengage its mechanical brake, engage the driven turbine excitation, and start the speed governor to drive the first unit to start pumping phase regulation in the driven turbine excitation mode.

2. The method according to claim 1, characterized in that, After the first unit sends an acceleration command to the second unit, the method further includes: Under the excitation of the driven machine, the first unit accelerates in response to the rotating magnetic field of the second unit, and when the motor speed of the first unit reaches a preset speed threshold, the excitation automatic voltage regulator (AVR) mode is set and the synchronization circuit is engaged. After the relevant parameters of the motor are in line with the power grid, the first unit automatically synchronizes with the grid, closes the first unit's GCB, and notifies the second unit; wherein, the relevant parameters of the motor include voltage, frequency, and phase; After the GCB of the second unit is disconnected, the first unit disconnects the start isolation switch of the first unit, resets the synchronization device and circuit of the first unit, and resets the back-to-back drive mode of the first unit; wherein, the GCB of the second unit is disconnected after the GCB of the first unit is closed. The first unit enters the pumping and phase adjustment operation mode.

3. The method according to claim 1 or 2, characterized in that, The first back-to-back drag-and-start command includes the unit identifier of the second unit; the method further includes: In response to receiving the first back-to-back towing start command, the first unit sends a towing start command to the second unit; wherein the towing start command is used to instruct the second unit to start the thrust high-pressure oil jacking DC pump test; The first unit receives a first feedback signal from the second unit; wherein, the first feedback signal is used to indicate that the thrust high-pressure oil jacking DC pump test of the second unit is normal.

4. The method according to claim 2, characterized in that, The first unit determines that the first unit and the second unit are connected via a bus, including: If there are other pumped storage units between the first unit and the second unit, the first unit sends a control command to the common LCU of the units. The control command is used to instruct the common LCU of the units to close the bus tie switch between the first unit and the second unit. Wherein, after the common LCU of the first unit closes the bus tie switch, the operating status of multiple devices in the first unit is set; After resetting the back-to-back drag mode of the first unit, the method further includes: The first unit disconnects the start-up bus connection switch between the first unit and the second unit.

5. A method for starting up a pumped water system with phase adjustment, characterized in that, The method is applied to a pumped-storage system, which includes a control terminal and multiple pumped-storage units. The method is applied to a second unit among the multiple pumped-storage units, and includes: The second unit receives a drive start command from the first unit, initiates a thrust high-pressure oil jacking DC pump test, and, if both the first and second units' thrust high-pressure oil jacking DC pump tests are normal, starts the unit's relevant auxiliary systems; wherein, the drive start command is sent by the first unit after receiving a first back-to-back drive start command from the control terminal, the first back-to-back drive start command being used to instruct the first unit, as the driven unit, to be driven by the second unit among the plurality of pumped storage units, in a back-to-back drive mode for pumping phase adjustment start; When the second unit is connected to the first unit via a busbar, the operating status of multiple devices in the second unit is set; wherein, setting the operating status of multiple devices in the second unit includes: closing the drive disconnect switch, opening the unit neutral point disconnect switch, switching the governor operating condition selection solenoid valve to the generator operating condition position, setting the excitation to back-to-back drive mode, setting the governor to back-to-back drive mode, opening the governor hydraulic circuit emergency stop solenoid valve, and engaging the mechanical brake; After the drive disconnect switch of the first unit is closed, the second unit closes the GCB of the second unit; The second unit responds to the instruction of the first unit by opening the water inlet valve of the second unit; The second unit receives an acceleration command from the first unit, disengages the mechanical brake, engages the drive motor excitation start speed regulator, and drives the first unit to start pumping phase adjustment in the driven motor excitation mode; wherein, the acceleration command is sent by the first unit after the water inlet valve of the second unit is opened to a preset intermediate opening degree; After the GCB of the first unit is closed, the second unit stops its governor, disconnects its GCB, and continues with subsequent shutdown procedures.

6. The method according to claim 5, characterized in that, Before the start-up test of the high-pressure oil jacking DC pump, the method further includes: The second unit receives a second back-to-back drag start command from the control terminal; wherein, the second back-to-back drag start command is used to instruct the second unit, as the dragger, to drag the first unit, as the dragged unit, in a back-to-back drag manner to start; The second back-to-back drag start command includes the unit identifier of the first unit.

7. A pumped-storage unit, characterized in that, The pumped storage unit is the first unit among a plurality of pumped storage units. The first unit is driven by the second unit among the plurality of pumped storage units in a back-to-back driving mode. The first unit includes: a memory and at least one processor, and also includes related devices / equipment for pumping phase adjustment and starting in the pumped storage unit. The memory is communicatively connected to the processor; the memory is used to store computer program code, the computer program code including computer instructions; when the processor executes the computer instructions, it causes the first unit to perform the method as described in any one of claims 1-4.

8. A pumped-storage unit, characterized in that, The pumped storage unit is the second unit among multiple pumped storage units. The second unit acts as a drive unit to start the first unit among the multiple pumped storage units as the driven unit in a back-to-back drive mode. The second unit includes: a memory and at least one processor, and also includes related devices / equipment for pumping phase adjustment and starting in the pumped storage unit. The memory is communicatively connected to the processor; the memory is used to store computer program code, the computer program code including computer instructions; when the processor executes the computer instructions, it causes the second unit to perform the method as described in any one of claims 5-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, are used to implement the method as described in any one of claims 1-6.

10. A computer program product, characterized in that, When the computer program product is run on a computer / executed by the computer's processor, it implements the method as described in any one of claims 1-6.

Images