CN-122026356-A - Power control method, device, equipment, system and medium

CN122026356ACN 122026356 ACN122026356 ACN 122026356ACN-122026356-A

Abstract

The application relates to a power control method, a device, equipment, a system and a medium, wherein the method comprises the steps of obtaining a control instruction of electric equipment, adjusting the power generation power of power generation equipment according to the shutdown power change characteristic of the electric equipment when the control instruction of the electric equipment is obtained as a shutdown instruction, detecting whether the parallel point has abnormal power fluctuation or not, and carrying out reverse power processing according to the total active power of the parallel point and the shutdown power change characteristic when the parallel point has abnormal power fluctuation, so that the reverse power of the parallel point can be quickly eliminated, the control precision is improved while the stability of the system operation is improved, and the problems of poor system operation stability, low control precision and the like caused by the fact that the transient power fluctuation of a high-power load in shutdown cannot be identified in the prior art are solved.

Inventors

SUN XIAOHUI
LI WEIJIN
REN PENG
WEN WU
WANG HAONAN
HUANG HUIJUAN

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260512
Application Date: 20251231

Claims (11)

1. A method of power control, the method comprising: Acquiring a control instruction of electric equipment; under the condition that the control instruction is a shutdown instruction, regulating the power generation power of the power generation equipment according to the shutdown power change characteristic of the electric equipment, and detecting whether abnormal power fluctuation occurs in a grid-connected point; And if abnormal power fluctuation occurs in the grid-connected point, performing reverse power processing according to the total active power of the grid-connected point and combining the shutdown power change characteristics to obtain a reverse power processing result.
2. The method of claim 1, wherein the adjusting the generated power of the power generation device according to the power change characteristic of the electric device, and detecting whether the abnormal power fluctuation occurs in the point of connection, comprises: based on the shutdown power change characteristics, determining each power change process and the corresponding inverse power change quantity of each power change process when the electric equipment is shut down; Adopting the reverse power variation to reduce and regulate the power generation power of the power generation equipment, and detecting whether the power fluctuation quantity of the grid-connected point exceeds a preset normal fluctuation range in the reducing and regulating process; and if the power fluctuation quantity exceeds the normal fluctuation range, determining that abnormal power fluctuation occurs at the grid-connected point.
3. The method of claim 2, wherein detecting whether the power fluctuation amount of the grid-connected point is beyond a preset normal fluctuation range comprises: Performing power detection on the grid-connected point to obtain total active power detection information, wherein the total active power detection information comprises the total active power of the grid-connected point and the detection time corresponding to the total active power of the grid-connected point; determining the power difference of adjacent time points by adopting the total active power of the grid-connected points and the detection time; Judging whether the power fluctuation value of the grid-connected point is larger than a fluctuation threshold corresponding to the normal fluctuation range or not based on the power difference; And if the power fluctuation value is larger than the fluctuation threshold value, determining that the power fluctuation quantity exceeds the normal fluctuation range.
4. The power control method according to claim 1, wherein the performing the inverse power processing according to the total active power of the point of connection and in combination with the shutdown power variation feature to obtain an inverse power processing result includes: Acquiring total active power of a grid-connected point; Performing inverse power calculation according to the total active power of the grid-connected point to obtain initial inverse power; determining an inverse power variation based on the shutdown power variation characteristics; superposing the initial reverse power and the reverse power variation to obtain a reverse power control quantity corresponding to the shutdown process; adjusting the power generated by the power generation equipment according to the inverse power control quantity to obtain a power adjustment result corresponding to the power generation equipment; And determining an inverse power processing result based on the power adjustment result.
5. The power control method according to claim 1, wherein before the control instruction of the electric device is acquired, the method further comprises: and acquiring the shutdown power change characteristics of the electric equipment.
6. The power control method of claim 5, further comprising: Collecting power change history information in the shutdown process of the electric equipment; And determining the shutdown power change characteristic according to the power change history information.
7. The power control method according to any one of claims 1 to 6, characterized in that the method further comprises, after obtaining the control instruction of the electric device: judging whether the control instruction is a shutdown instruction of the power generation equipment; And if the control instruction is not a shutdown instruction, performing reverse power processing according to the total active power of the grid-connected point to obtain a reverse power processing result.
8. A power control apparatus, comprising: The instruction acquisition module is used for acquiring a control instruction of the electric equipment; The power-off adjusting module is used for adjusting the power generation power of the power generation equipment according to the power-off power change characteristic of the electric equipment under the condition that the control instruction is a power-off instruction, and detecting whether abnormal power fluctuation occurs in a grid-connected point or not; And the reverse power processing module is used for carrying out reverse power processing according to the total active power of the grid-connected point and the shutdown power change characteristic to obtain a reverse power processing result when abnormal power fluctuation occurs at the grid-connected point.
9. The power control device is characterized by comprising a processor, a communication module, a memory and a communication bus, wherein the processor, the communication module and the memory are communicated with each other through the communication bus; the memory is used for storing a computer program; the processor being adapted to carry out the steps of the power control method according to any one of claims 1-7 when executing a computer program stored in the memory.
10. An energy system comprising a power control device, a power generation device and a powered device, the power control device being electrically connected to the power generation device and the powered device, respectively, the power control device being configured to implement the power control method of any of claims 1-7.
11. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the power control method according to any of claims 1-7.

Description

Power control method, device, equipment, system and medium Technical Field The present application relates to the field of power electronics technologies, and in particular, to a power control method, apparatus, device, system, and medium. Background With the rapid development of new energy, the application range of the distributed energy system as an open energy system is wider and wider. In a distributed energy system, reverse power control is one of important means for ensuring safe and stable operation of a power grid. Specifically, in a distributed energy system such as a photovoltaic grid-connected system, an energy storage system and the like, a centrifugal machine, a screw machine, large industrial production equipment and other high-power loads are often connected, and the high-power loads generate large instantaneous power fluctuation at the closing moment, so that the instantaneous power fluctuation easily causes the grid-connected point to generate large reverse power in a short time, and the power of the grid-connected point is further changed drastically. If the reverse power cannot be eliminated within the preset reverse power protection time of the system, the rigid cut-off logic of the system can be directly triggered, so that the power generation equipment of the whole distributed energy system is disconnected, and the running stability of the system is seriously affected. Disclosure of Invention The application provides a power control method, a device, equipment, a system and a medium, which are used for solving the problem that in the prior art, the system operation stability is poor due to the fact that instantaneous power fluctuation of a high-power load during shutdown cannot be identified. In a first aspect, the present application provides a power control method, including: Acquiring a control instruction of electric equipment; under the condition that the control instruction is a shutdown instruction, regulating the power generation power of the power generation equipment according to the shutdown power change characteristic of the electric equipment, and detecting whether abnormal power fluctuation occurs in a grid-connected point; And if abnormal power fluctuation occurs in the grid-connected point, performing reverse power processing according to the total active power of the grid-connected point and combining the shutdown power change characteristics to obtain a reverse power processing result. Optionally, the adjusting the power generated by the power generating device according to the power variation characteristic of the electric equipment, and detecting whether the grid-connected point has abnormal power fluctuation, includes: based on the shutdown power change characteristics, determining each power change process and the corresponding inverse power change quantity of each power change process when the electric equipment is shut down; Adopting the reverse power variation to reduce and regulate the power generation power of the power generation equipment, and detecting whether the power fluctuation quantity of the grid-connected point exceeds a preset normal fluctuation range in the reducing and regulating process; and if the power fluctuation quantity exceeds the normal fluctuation range, determining that abnormal power fluctuation occurs at the grid-connected point. Optionally, the detecting whether the power fluctuation amount of the grid-connected point is beyond a preset normal fluctuation range includes: Performing power detection on the grid-connected point to obtain total active power detection information, wherein the total active power detection information comprises the total active power of the grid-connected point and the detection time corresponding to the total active power of the grid-connected point; determining the power difference of adjacent time points by adopting the total active power of the grid-connected points and the detection time; Judging whether the power fluctuation value of the grid-connected point is larger than a fluctuation threshold corresponding to the normal fluctuation range or not based on the power difference; And if the power fluctuation value is larger than the fluctuation threshold value, determining that the power fluctuation quantity exceeds the normal fluctuation range. Optionally, the performing inverse power processing according to the total active power of the point of connection and in combination with the shutdown power variation feature to obtain an inverse power processing result includes: Acquiring total active power of a grid-connected point; Performing inverse power calculation according to the total active power of the grid-connected point to obtain initial inverse power; determining an inverse power variation based on the shutdown power variation characteristics; superposing the initial reverse power and the reverse power variation to obtain a reverse power control quantity corresponding to the shutdown process; ad