CN117318070B - Load shedding control method and device for power equipment of pumping and accumulating plant and load shedding control equipment - Google Patents

Abstract

The present application relates to the technical field of power control for pumped storage plants, and provides a load shedding control method, device and load shedding control device for power equipment in pumped storage plants. The method comprises: monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage; if the high-voltage bus loses voltage, starting the first load shedding control, enabling the high-voltage backup power supply to supply power to important power equipment associated with each low-voltage main power supply, and not supply power to non-important power equipment; if the high-voltage bus does not lose voltage, monitoring whether the low-voltage bus between each low-voltage main power supply and its associated power equipment loses voltage; if any low-voltage bus loses voltage, obtaining the startup status of the low-voltage backup power supply associated with any low-voltage main power supply; if the low-voltage backup power supply does not start, starting the second load shedding control, enabling the power supply of non-pumped storage plants to supply power to important power equipment associated with any low-voltage main power supply, and not supply power to non-important power equipment. The use of this method can ensure the power supply of important power equipment when the backup power supply is enabled.

Description

Load reduction control method, device and load reduction control device for pumped storage power plant equipment

Technical Field

The present application relates to the technical field of pumped-storage plant power control, and in particular to a method and device for load shedding control of pumped-storage plant power equipment, a load shedding control device for pumped-storage plant power equipment, a storage medium and a computer program product.

Background Art

When the main power supply of a pumped storage plant is lost due to equipment failure, distribution system failure, unexpected events, etc., and cannot supply power to the power equipment of the pumped storage plant, the backup power supply can be activated to supply power to the power equipment of the pumped storage plant.

At present, when the backup power supply is activated, the backup power supply is used to supply power to all electrical equipment in the pumped storage plant, which is insufficient to provide protection for important electrical equipment.

Summary of the invention

Based on this, it is necessary to provide a load shedding control method and device for pumped-storage plant power equipment, a load shedding control device for pumped-storage plant power equipment, a computer-readable storage medium and a computer program product to address the above technical problems.

In a first aspect, the present application provides a load shedding control method for power equipment in a pumped storage plant, wherein a high-voltage main power supply is converted into multiple low-voltage main power supplies through a transformer, and each low-voltage main power supply supplies power to power equipment associated with itself; the method comprises:

Monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage;

If the high-voltage bus loses voltage, the first load shedding control is started. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important power-consuming equipment associated with each of the low-voltage main power supplies, and non-important power-consuming equipment is not supplied with power.

If the high-voltage busbar has not lost pressure, monitor whether the low-voltage busbar between each low-voltage main power source and its associated electrical equipment has lost pressure;

If any low-voltage bus loses voltage, the startup status of the low-voltage backup power supply associated with any low-voltage main power supply is obtained;

If the low-voltage backup power supply is not started, the second load reduction control is started. Under the second load reduction control, the power supply outside the pumped storage plant is enabled to supply power to important electrical equipment associated with any low-voltage main power supply, and non-important electrical equipment is not supplied.

In one embodiment, monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage includes:

Obtaining the action status of the high-voltage relay associated with the high-voltage bus;

Whether the high-voltage bus loses pressure is determined according to the operation of the high-voltage relay.

In one embodiment, judging whether the high-voltage bus loses pressure according to the operation of the high-voltage relay includes:

When the high-voltage relay is in a demagnetized state, determining that the high-voltage bus loses pressure;

When the high-voltage relay is in an energized state, it is determined that the high-voltage bus has not lost pressure.

In one embodiment, monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage includes:

Monitor whether the high-voltage main bus between the high-voltage main power supply and the transformer loses voltage;

If the high-voltage main bus loses voltage, monitor whether the high-voltage standby bus between the high-voltage main power supply and the transformer loses voltage;

Whether the high-voltage bus loses pressure is determined based on whether the high-voltage standby bus loses pressure.

In one embodiment, the monitoring of whether the low-voltage bus between each low-voltage main power supply and its associated electrical equipment loses voltage includes:

Obtaining the action status of the low-voltage relay associated with the low-voltage bus;

Whether the low-voltage bus loses pressure is determined according to the operation of the low-voltage relay.

In one of the embodiments, after starting the first load reduction control, the method further includes:

In the case where there are multiple sections of the high-voltage busbars, when the multiple sections of the high-voltage busbars are all powered on, the power supply to the non-important electrical equipment associated with each of the low-voltage main power supplies is restored based on the high-voltage main power supply.

In one of the embodiments, after starting the second load reduction control, the method further includes:

In the case where there are multiple sections of the low-voltage bus, when any section of the low-voltage bus is powered on, power supply to non-important electrical equipment associated with any low-voltage main power supply is restored based on any low-voltage main power supply.

In the second aspect, the present application also provides a load reduction control device for pumped storage power plant power equipment, wherein a high-voltage main power supply is converted into multiple low-voltage main power supplies through a transformer, and each low-voltage main power supply supplies power to the power equipment associated with itself; the device comprises:

A high-voltage bus monitoring module, used to monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage;

A first load shedding control module is used to start a first load shedding control if the high-voltage bus loses voltage. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important electrical equipment associated with each of the low-voltage main power supplies, and non-important electrical equipment is not supplied with power;

A low-voltage bus monitoring module is used to monitor whether the low-voltage bus between each low-voltage main power supply and its associated electrical equipment loses voltage if the high-voltage bus does not lose voltage;

A startup status acquisition module is used to acquire the startup status of a low-voltage backup power supply associated with any low-voltage main power supply if any low-voltage bus loses voltage;

The second load shedding control module starts the second load shedding control if the low-voltage backup power supply is not started. Under the second load shedding control, the power supply outside the pumped storage plant is enabled to supply power to important electrical equipment associated with any low-voltage main power supply, and non-important electrical equipment is not supplied with power.

In a third aspect, the present application further provides a load shedding control device for pumped storage power plant power equipment. The load shedding control device for pumped storage power plant power equipment comprises a memory and a processor, the memory stores a computer program, and the processor executes the above method.

In a fourth aspect, the present application further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and the computer program is executed by a processor to execute the above method.

In a fifth aspect, the present application further provides a computer program product, wherein the computer program product comprises a computer program, and the computer program is executed by a processor to execute the above method.

The load shedding control method, device, load shedding control device, storage medium and computer program product of the pumped storage plant power equipment monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage; if the high-voltage bus loses voltage, the first load shedding control is started, and under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important power equipment associated with each low-voltage main power supply, and not to non-important power equipment; if the high-voltage bus does not lose voltage, the low-voltage bus between each low-voltage main power supply and its associated power equipment is monitored to see whether it loses voltage; if any low-voltage bus loses voltage, the startup status of the low-voltage backup power supply associated with any low-voltage main power supply is obtained; if the low-voltage backup power supply is not started, the second load shedding control is started, and under the second load shedding control, the power supply outside the pumped storage plant is enabled to supply power to important power equipment associated with any low-voltage main power supply, and not to non-important power equipment. This scheme selectively supplies power to important power equipment and does not supply power to non-important power equipment, ensuring the effective supply of the backup power supply, and ensuring the power supply of important power equipment when the backup power supply is enabled.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 is an application environment diagram of a load reduction control method for pumped-storage power plant equipment in one embodiment;

FIG2 is a flow chart of a method for controlling load shedding of pumped storage power plant equipment in one embodiment;

FIG3 is a schematic diagram of a process for determining whether a high-voltage bus loses pressure in one embodiment;

FIG4 is a structural block diagram of a load shedding control device for pumped storage power plant equipment in one embodiment;

FIG5 is a diagram showing the internal structure of a load shedding control device for a pumped-storage power plant in one embodiment.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

The load shedding control method for pumped storage power plant equipment provided in the embodiment of the present application can be applied in the application environment as shown in Figure 1. The load shedding control device of the pumped storage power plant equipment monitors whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage; if the high-voltage bus loses voltage, the first load shedding control is started. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important power equipment associated with each low-voltage main power supply, and non-important power equipment is not powered; if the high-voltage bus does not lose voltage, the low-voltage bus between each low-voltage main power supply and its associated power equipment is monitored to see whether it loses voltage; if any low-voltage bus loses voltage, the startup status of the low-voltage backup power supply associated with any low-voltage main power supply is obtained; if the low-voltage backup power supply is not started, the second load shedding control is started. Under the second load shedding control, the power supply outside the pumped storage plant is enabled to supply power to important power equipment associated with any low-voltage main power supply, and non-important power equipment is not powered.

In an exemplary embodiment, as shown in FIG2 , a method for load shedding control of pumped-storage power plant equipment is provided, which is described by taking the method applied to the load shedding control device of the pumped-storage power plant equipment in FIG1 as an example, and includes the following steps S201 to S205 .

Step S201, monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage.

The high-voltage busbar supplies power to the power equipment of the pumped storage plant. The high-voltage busbar between the high-voltage main power supply and the transformer can have multiple sections, and each section of the high-voltage busbar can be divided into multiple sections. When the high-voltage busbar loses pressure, it indicates that the high-voltage main power supply cannot normally supply power to the power equipment associated with the low-voltage main power supply. When the high-voltage busbar does not lose pressure, it indicates that the high-voltage main power supply can normally supply power to the power equipment associated with the low-voltage main power supply.

In this step, the load reduction control device of the pumped storage plant power equipment monitors whether the high-voltage bus between the high-voltage main power supply and the transformer has lost voltage, and determines whether the high-voltage main power supply can normally supply power to the power equipment associated with the low-voltage main power supply according to the voltage loss situation of the high-voltage bus.

Step S202: If the high-voltage bus loses voltage, the first load shedding control is started. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important electrical equipment associated with each low-voltage main power supply, and non-important electrical equipment is not supplied.

When the high-voltage bus loses voltage, it indicates that the high-voltage main power supply, such as the 6KV main power supply, cannot normally supply power to the power equipment of the pumped storage plant. At this time, it is necessary to enable the high-voltage backup power supply, such as the 6KV emergency diesel generator, to supply power to the power equipment of the pumped storage plant. In order to ensure the power supply of important power equipment, the load of the power supply to the power equipment can be reduced after the high-voltage backup power supply is enabled. Specifically, the important power equipment associated with each low-voltage main power supply can be powered, and the non-important power equipment associated with each low-voltage main power supply cannot be powered. In order to distinguish it from the load reduction control when the low-voltage bus loses voltage, the load reduction control when the high-voltage bus loses voltage can be called the first load reduction control.

In this step, when the high-voltage bus loses voltage, the first load reduction control is started. Under the first load reduction control, the high-voltage backup power supply is enabled to supply power to important electrical equipment associated with each low-voltage main power supply, and non-important electrical equipment is not supplied, thereby ensuring the power supply to important electrical equipment.

Step S203: If the high-voltage busbar has not lost voltage, monitor whether the low-voltage busbar between each low-voltage main power source and its associated electrical equipment has lost voltage.

When the high-voltage bus has not lost voltage, it indicates that the high-voltage main power supply can normally supply power to the electrical equipment associated with each low-voltage main power supply. If at this time there is still a situation where the low-voltage main power supply, such as the 400V main power supply, cannot normally supply power to its associated electrical equipment, it is also necessary to monitor whether the low-voltage bus between each low-voltage main power supply and its associated electrical equipment has lost voltage. Based on whether the low-voltage bus has lost voltage, it is determined whether each low-voltage main power supply can normally supply power to its associated electrical equipment.

In this step, when the high-voltage bus has not lost pressure, the load reduction control device of the pumped storage plant power equipment monitors whether the low-voltage bus between each low-voltage main power supply and its associated power equipment has lost pressure, and determines whether each low-voltage main power supply can normally supply power to its associated power equipment based on the pressure loss of the low-voltage bus.

Step S204: if any low-voltage bus loses voltage, then the startup status of a low-voltage backup power supply associated with any low-voltage main power supply is obtained.

When any low-voltage bus loses voltage, it means that the low-voltage main power supply corresponding to the bus cannot normally supply power to its associated electrical equipment. At this time, the low-voltage backup power supply associated with the low-voltage main power supply, such as a 400V emergency diesel generator, will generally be started to supply power to the electrical equipment associated with the low-voltage main power supply.

Therefore, in this step, when any low-voltage bus loses voltage, the startup status of the low-voltage backup power supply associated with the low-voltage main power supply is obtained to determine whether the power supply to the electrical equipment associated with the low-voltage main power supply is normal.

Step S205, if the low-voltage backup power supply is not started, the second load reduction control is started. Under the second load reduction control, the power supply outside the pumped storage plant is enabled to supply power to any important power equipment associated with the low-voltage main power supply, and non-important power equipment is not supplied.

When the low-voltage backup power supply is not started, it indicates that the power supply to the power-consuming equipment associated with the low-voltage main power supply is abnormal. At this time, the power supply to the power-consuming equipment can be reduced, and the important power-consuming equipment associated with the low-voltage main power supply is powered, and the non-important power-consuming equipment associated with the low-voltage main power supply is not powered, so that the power supply to the important power-consuming equipment associated with the low-voltage main power supply can be guaranteed. In order to distinguish it from the load reduction control when the high-voltage bus loses pressure, the load reduction control when the low-voltage bus loses pressure can be called the second load reduction control.

In the above-mentioned load reduction control method for pumped storage plant power equipment, power is selectively supplied to important power equipment and non-important power equipment, thereby ensuring the effective supply of backup power and guaranteeing the power supply to important power equipment when the backup power is enabled.

In one of the embodiments, the high-voltage bus between the high-voltage main power supply and the transformer is monitored for voltage loss. The specific steps are as follows: obtaining the action status of the high-voltage relay associated with the high-voltage bus; and judging whether the high-voltage bus is voltage loss based on the action status of the high-voltage relay.

The action of the high-voltage relay associated with the high-voltage bus can reflect the pressure loss of the high-voltage bus. When the high-voltage relay is in a demagnetized state, it can be determined that the high-voltage bus has lost pressure. When the high-voltage relay is in an energized state, it can be determined that the high-voltage bus has not lost pressure. The load reduction control equipment of the power equipment of the pumped storage plant can monitor the pressure loss of the high-voltage bus by monitoring the action of the high-voltage relay.

In one of the embodiments, whether the high-voltage bus loses pressure is determined based on the operation of the high-voltage relay, and the specific steps are as follows: when the high-voltage relay is in a demagnetized state, it is determined that the high-voltage bus loses pressure; when the high-voltage relay is in an energized state, it is determined that the high-voltage bus does not lose pressure.

When there are multiple sections of high-voltage busbars, a total high-voltage relay can be set to reflect the pressure loss of the high-voltage busbar. When the high-voltage relays corresponding to the multiple sections of high-voltage busbars are all demagnetized, the total high-voltage relay is demagnetized, and it can be determined that the high-voltage busbar has lost pressure; when the high-voltage relay corresponding to any section of the high-voltage busbar is energized, the total high-voltage relay is energized, and it can be determined that the high-voltage busbar has not lost pressure.

In one of the embodiments, it is monitored whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage. The specific steps are shown in Figure 3. Step S301, monitor whether the high-voltage main bus between the high-voltage main power supply and the transformer loses voltage; Step S302, if the high-voltage main bus loses voltage, monitor whether the high-voltage standby bus between the high-voltage main power supply and the transformer loses voltage; Step S303, judge whether the high-voltage bus loses voltage based on whether the high-voltage standby bus loses voltage.

When the high-voltage bus between the high-voltage main power supply and the transformer includes a high-voltage main bus and a high-voltage standby bus, when the high-voltage main bus between the high-voltage main power supply and the transformer loses voltage, it indicates that the high-voltage main bus cannot normally supply power to the electrical equipment associated with the low-voltage main power supplies. At this time, the high-voltage standby bus can also be used to normally supply power to the electrical equipment associated with the low-voltage main power supplies. Therefore, when the high-voltage main bus loses voltage, it is possible to further monitor whether the high-voltage standby bus loses voltage. If the high-voltage standby bus loses voltage, it indicates that the high-voltage standby bus cannot normally supply power to the electrical equipment associated with the low-voltage main power supplies, and it can be determined that the high-voltage bus has lost voltage.

In this embodiment, the high-voltage main bus between the high-voltage main power supply and the transformer is first monitored to see whether it has lost voltage. If the high-voltage main bus has lost voltage, the high-voltage standby bus between the high-voltage main power supply and the transformer is monitored to see whether it has lost voltage. Finally, based on whether the high-voltage standby bus has lost voltage, it is determined whether the high-voltage bus has lost voltage, thereby optimizing the load shedding control logic of the pumped-storage plant power equipment.

In one of the embodiments, the low-voltage bus between each low-voltage main power supply and its associated electrical equipment is monitored for voltage loss. The specific steps are as follows: obtaining the operating status of the low-voltage relay associated with the low-voltage bus; and judging whether the low-voltage bus has voltage loss based on the operating status of the low-voltage relay.

The action of the low-voltage relay associated with the low-voltage bus can reflect the pressure loss of the low-voltage bus. When the low-voltage relay is in a demagnetized state, it can be determined that the low-voltage bus has lost pressure. When the low-voltage relay is in an energized state, it can be determined that the low-voltage bus has not lost pressure. The load reduction control equipment of the power equipment of the pumped storage plant can monitor the pressure loss of the low-voltage bus by monitoring the action of the low-voltage relay.

In one of the embodiments, after starting the first load reduction control, the method provided in the present application also includes: in the case where there are multiple sections of high-voltage busbars, when the multiple sections of high-voltage busbars are all restored to power, based on the high-voltage main power supply, the power supply to non-important electrical equipment associated with each low-voltage main power supply is restored.

When there are multiple sections of high-voltage busbars, when all the sections of high-voltage busbars are restored to power, it indicates that the high-voltage main power supply can normally supply power to the electrical equipment associated with each low-voltage main power supply. At this time, the first load reduction control can be stopped, and the high-voltage main power supply can be enabled to supply power to the electrical equipment associated with each low-voltage main power supply. After different delays, the power supply to non-important electrical equipment associated with each low-voltage main power supply can be restored.

In one of the embodiments, after starting the second load reduction control, the method provided by the present application also includes: in the case where there are multiple low-voltage bus sections, when any section of the low-voltage bus is restored to power, based on any low-voltage main power supply, restoring power to non-critical electrical equipment associated with any low-voltage main power supply.

When there are multiple sections of low-voltage busbars, when any section of the low-voltage busbars is restored to power, it indicates that the low-voltage main power supply can normally supply power to the associated electrical equipment. At this time, the second load reduction control can be stopped, and the low-voltage main power supply can be enabled to supply power to the associated electrical equipment. After different delays, the power supply to non-important electrical equipment associated with the low-voltage main power supply can be restored.

It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application also provides a load shedding control device for pumped-storage power plant equipment for implementing the load shedding control method for pumped-storage power plant equipment involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the load shedding control device embodiments of one or more pumped-storage power plant equipment provided below can refer to the limitations of the load shedding control method for pumped-storage power plant equipment above, and will not be repeated here.

In an exemplary embodiment, as shown in FIG4 , a load shedding control device for a pumped storage power plant is provided, wherein:

A high-voltage bus monitoring module 401 is used to monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage;

A first load shedding control module 402 is used to start a first load shedding control if the high-voltage bus loses voltage. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important electrical equipment associated with each low-voltage main power supply, and non-important electrical equipment is not supplied power;

The low-voltage bus monitoring module 403 is used to monitor whether the low-voltage bus between each low-voltage main power supply and its associated electrical equipment loses pressure if the high-voltage bus does not lose pressure;

The startup status acquisition module 404 is used to acquire the startup status of the low-voltage backup power supply associated with any low-voltage main power supply if any low-voltage bus loses voltage;

The second load shedding control module 405 starts the second load shedding control if the low-voltage backup power supply is not started. Under the second load shedding control, the power supply in the non-pumped storage plant is enabled to supply power to the important power-consuming equipment associated with any of the low-voltage main power supplies, and does not supply power to non-important power-consuming equipment.

In one of the embodiments, the high-voltage bus monitoring module 401 is further used to: obtain the operation status of the high-voltage relay associated with the high-voltage bus; and determine whether the high-voltage bus loses pressure based on the operation status of the high-voltage relay.

In one of the embodiments, the high-voltage bus monitoring module 401 is further used to: determine that the high-voltage bus has lost pressure when the high-voltage relay is in a demagnetized state; and determine that the high-voltage bus has not lost pressure when the high-voltage relay is in an energized state.

In one of the embodiments, the high-voltage bus monitoring module 401 is also used to: monitor whether the high-voltage main bus between the high-voltage main power supply and the transformer loses voltage; if the high-voltage main bus loses voltage, monitor whether the high-voltage standby bus between the high-voltage main power supply and the transformer loses voltage; and determine whether the high-voltage bus loses voltage based on whether the high-voltage standby bus loses voltage.

In one of the embodiments, the low-voltage bus monitoring module 403 is further used to: obtain the operation status of the low-voltage relay associated with the low-voltage bus; and determine whether the low-voltage bus loses pressure based on the operation status of the low-voltage relay.

In one of the embodiments, after starting the first load reduction control, the device also includes a load reduction restoration module, which is used to: when the number of the high-voltage bus is multiple sections, when the multiple sections of the high-voltage bus are all restored to power, based on the high-voltage main power supply, restore the power supply to non-important electrical equipment associated with each of the low-voltage main power supplies.

In one of the embodiments, after starting the second load reduction control, the device also includes a load reduction restoration module, which is used to: when the number of the low-voltage bus bars is multiple, when any section of the low-voltage bus bars is restored to power, based on any low-voltage main power supply, restore power supply to non-important electrical equipment associated with any low-voltage main power supply.

Each module in the load shedding control device of the pumped storage power plant equipment can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of the processor in the load shedding control device of the pumped storage power plant equipment in the form of hardware, or can be stored in the memory of the load shedding control device of the pumped storage power plant equipment in the form of software, so that the processor can call and execute the operations corresponding to each module above.

In an exemplary embodiment, a load shedding control device for a pumped storage plant power equipment is provided, and its internal structure diagram may be shown in FIG5. The load shedding control device for the pumped storage plant power equipment includes a processor, a memory, an input/output interface (Input/Output, referred to as I/O) and a communication interface. The processor, the memory and the input/output interface are connected through a system bus, and the communication interface is connected to the system bus through the input/output interface. The processor of the load shedding control device for the pumped storage plant power equipment is used to provide computing and control capabilities. The memory of the load shedding control device for the pumped storage plant power equipment includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the load shedding control device for the pumped storage plant power equipment is used to store data of the load shedding control device for the pumped storage plant power equipment. The input/output interface of the load shedding control device for the pumped storage plant power equipment is used to exchange information between the processor and an external device. The communication interface of the load shedding control device for the pumped storage plant power equipment is used to communicate with an external terminal through a network connection. When the computer program is executed by a processor, a load reduction control method for pumped-storage power plant equipment is implemented.

Those skilled in the art will understand that the structure shown in FIG5 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the load shedding control device of the pumped-storage plant power equipment to which the scheme of the present application is applied. The specific load shedding control device of the pumped-storage plant power equipment may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

In one embodiment, a load shedding control device for pumped storage power plant equipment is provided, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims (10)

1. A load shedding control method for power equipment in a pumped storage plant, characterized in that a high-voltage main power supply is converted into multiple low-voltage main power supplies through a transformer, and each low-voltage main power supply supplies power to the power equipment associated with itself; the method comprises: Monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage; If the high-voltage bus loses voltage, the first load shedding control is started. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important power-consuming equipment associated with each of the low-voltage main power supplies, and non-important power-consuming equipment is not supplied with power. If the high-voltage busbar has not lost voltage, monitor whether the low-voltage busbar between each low-voltage main power supply and its associated electrical equipment has lost voltage, so as to determine whether each low-voltage main power supply can normally supply power to its associated electrical equipment; If any low-voltage bus loses voltage, indicating that the low-voltage main power supply corresponding to any low-voltage bus cannot normally supply power to its associated electrical equipment, then the startup status of the low-voltage backup power supply associated with any low-voltage main power supply is obtained to determine whether the power supply to the electrical equipment associated with the low-voltage main power supply is normal; If the low-voltage backup power supply is not started, indicating that the power supply to the electrical equipment associated with the low-voltage main power supply is abnormal, the second load reduction control is started. Under the second load reduction control, the power supply outside the pumped storage plant is enabled to supply power to the important electrical equipment associated with any low-voltage main power supply, and non-important electrical equipment is not supplied. 2. The method according to claim 1, characterized in that the step of monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage comprises: Obtaining the action status of the high-voltage relay associated with the high-voltage bus; Whether the high-voltage bus loses pressure is determined according to the operation of the high-voltage relay. 3. The method according to claim 2, characterized in that judging whether the high-voltage bus loses pressure according to the action of the high-voltage relay comprises: When the high-voltage relay is in a demagnetized state, determining that the high-voltage bus loses pressure; When the high-voltage relay is in an energized state, it is determined that the high-voltage bus has not lost pressure. 4. The method according to claim 1, characterized in that the step of monitoring whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage comprises: Monitor whether the high-voltage main bus between the high-voltage main power supply and the transformer loses voltage; If the high-voltage main bus loses voltage, monitor whether the high-voltage standby bus between the high-voltage main power supply and the transformer loses voltage; Whether the high-voltage bus loses pressure is determined based on whether the high-voltage standby bus loses pressure. 5. The method according to claim 1, characterized in that the step of monitoring whether the low-voltage bus between each low-voltage main power source and its associated electrical equipment loses voltage comprises: Obtaining the action status of the low-voltage relay associated with the low-voltage bus; Whether the low-voltage bus loses pressure is determined according to the operation of the low-voltage relay. 6. The method according to claim 1, characterized in that, after starting the first load reduction control, the method further comprises: In the case where there are multiple sections of the high-voltage busbars, when the multiple sections of the high-voltage busbars are powered on, the power supply to the non-important electrical equipment associated with each of the low-voltage main power supplies is restored based on the high-voltage main power supply. 7. The method according to claim 1, characterized in that, after starting the second load reduction control, the method further comprises: In the case where there are multiple sections of the low-voltage bus, when any section of the low-voltage bus is powered on, power supply to non-important electrical equipment associated with any low-voltage main power supply is restored based on any low-voltage main power supply. 8. A load shedding control device for power equipment in a pumped storage plant, characterized in that a high-voltage main power supply is converted into a plurality of low-voltage main power supplies through a transformer, and each low-voltage main power supply supplies power to the power equipment associated with itself; the device comprises: A high-voltage bus monitoring module, used to monitor whether the high-voltage bus between the high-voltage main power supply and the transformer loses voltage; A first load shedding control module is used to start a first load shedding control if the high-voltage bus loses voltage. Under the first load shedding control, the high-voltage backup power supply is enabled to supply power to important electrical equipment associated with each of the low-voltage main power supplies, and non-important electrical equipment is not supplied with power; A low-voltage bus monitoring module is used to monitor whether the low-voltage bus between each low-voltage main power supply and its associated electrical equipment loses voltage if the high-voltage bus does not lose voltage, so as to determine whether each low-voltage main power supply can normally supply power to its associated electrical equipment; A startup status acquisition module is used to obtain the startup status of a low-voltage backup power supply associated with any low-voltage main power supply if any low-voltage bus loses voltage, indicating that the low-voltage main power supply corresponding to any low-voltage bus cannot normally supply power to its associated electrical equipment, so as to determine whether the power supply to the electrical equipment associated with the low-voltage main power supply is normal; The second load shedding control module starts the second load shedding control if the low-voltage backup power supply is not started, indicating that the power supply to the power-consuming equipment associated with the low-voltage main power supply is abnormal. Under the second load shedding control, the power supply outside the pumped storage plant is enabled to supply power to the important power-consuming equipment associated with any of the low-voltage main power supplies, and does not supply power to non-important power-consuming equipment. 9. A load shedding control device for pumped storage power plant equipment, comprising a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the computer program. 10. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.