CN-121982855-A - Novel power system oscillation early warning method and device, electronic equipment and storage medium

CN121982855ACN 121982855 ACN121982855 ACN 121982855ACN-121982855-A

Abstract

The application provides a novel power system oscillation early warning method, a device, electronic equipment and a storage medium, wherein the method comprises the steps of setting an initial early warning threshold value, periodically storing various oscillation related characteristic values in a power system, selecting a target value from the characteristic values as a candidate early warning threshold value at an updating time point, enabling the preset time point to be related to a storage period of the oscillation related characteristic values, comparing the candidate early warning threshold value with a current early warning threshold value to determine whether the early warning threshold value is updated according to the candidate early warning threshold value, and carrying out oscillation early warning according to the oscillation related characteristic values and the early warning threshold value. The method has the advantages that through periodically storing various oscillation related characteristic values and dynamically adjusting the early warning threshold value, the early warning threshold value is adjusted in real time according to different working conditions of the power system and the change of the characteristic values, the actual running state of the power system can be accurately determined, potential oscillation risks can be timely captured, and the accuracy of oscillation early warning is improved.

Inventors

LU BIN
DENG FANGZHOU
ZHANG DEBAO
YANG SIYAO
LONG JIAN
HU LIN
SONG HONGLIANG
LI CHANGSHENG
WANG DIANJUN
WU YUJUN
LIU DONG
CHEN YAHAN

Assignees

华能澜沧江水电股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260107

Claims (10)

1. The novel power system oscillation early warning method is characterized by comprising the following steps of: setting an initial early warning threshold value, and periodically storing various oscillation related characteristic values in the power system; selecting a target value from the characteristic values at an updating time point as a candidate early warning threshold value, wherein the preset time point is related to a storage period of the oscillation related characteristic values; comparing the candidate early warning threshold value with a current early warning threshold value to determine whether to update the early warning threshold value according to the candidate early warning threshold value; And carrying out oscillation early warning according to the oscillation related characteristic value and the early warning threshold value.
2. The method of claim 1, wherein the step of determining the initial pre-warning threshold value comprises: According to the historical operation data of the power system, the fluctuation range of the oscillation related characteristic values under different working conditions is statistically analyzed, and the initial early warning threshold value is set by combining the safety and stability operation standard of the power system.
3. The method according to claim 2, wherein selecting the target value from the feature values at the updated time point as the candidate warning threshold value includes: Responding to the time length of the current time point from the updating time point of the last oscillation alarm threshold value, which is equal to the preset updating time length, and determining the current time point as the updating time point; and taking the oscillation related characteristic value between the current updating time point and the adjacent last updating time point as a reference characteristic value, and taking the most value in the reference characteristic value as the candidate early warning threshold value, wherein the updating time length is an integer multiple of the storage period of the oscillation related characteristic value.
4. The method of claim 3, wherein the comparing the candidate early warning threshold value with a current early warning threshold value to determine whether to update the early warning threshold value based on the candidate early warning threshold value comprises any one of: Responding to the candidate early warning threshold value being larger than the current early warning threshold value, wherein the difference value of the candidate early warning threshold value and the current early warning threshold value exceeds a preset first difference value threshold value, and the power system stably operates under the current working condition, and updating the early warning threshold value according to the candidate early warning threshold value; Responding to the candidate early warning threshold value being smaller than the current early warning threshold value, wherein the difference value of the candidate early warning threshold value and the current early warning threshold value exceeds a preset second difference value threshold value, and if the potential oscillation risk exists in the power system under the current working condition, updating the early warning threshold value according to the candidate early warning threshold value; Otherwise, keeping the current early warning threshold value unchanged.
5. The method according to, wherein said performing an oscillation early warning based on said oscillation related characteristic value and said early warning threshold value comprises Determining whether the oscillation related characteristic values are abnormal or not according to the early warning threshold values corresponding to the oscillation related characteristic values; and determining an early warning level according to the number of the abnormal oscillation related characteristic values and the amount that the abnormal oscillation related characteristic values exceed the early warning threshold value.
6. The method according to claim 5, wherein the determining whether the oscillation related feature values are abnormal according to the pre-warning threshold value corresponding to each oscillation related feature value includes any one of the following: determining that the oscillation related characteristic value is abnormal in response to the oscillation related characteristic value being greater than or equal to the early warning threshold value; And responding to the oscillation related characteristic value being smaller than the early warning threshold value, and determining that the oscillation related characteristic value is not abnormal.
7. The method of claim 6, wherein the determining the alert level based on the number of the oscillation-related characteristic values in which the anomaly has occurred and the amount by which the oscillation-related characteristic values in which the anomaly has occurred exceeds the alert threshold value comprises: Responding to that only one oscillation related characteristic value exceeds the oscillation alarm threshold value, and determining that the early warning level is a slight oscillation early warning when the difference value between the oscillation related characteristic value and the early warning threshold value is within a preset first exceeding range; Responding to 2 or 3 oscillation related characteristic values exceeding the oscillation alarm threshold value, wherein the difference value between the oscillation related characteristic values and the early warning threshold value is within a preset first exceeding range, or only one oscillation related characteristic value exceeds the oscillation alarm threshold value, and the difference value between the oscillation related characteristic values and the early warning threshold value is within a preset second exceeding range, and determining that the early warning level is a moderate oscillation early warning; And in response to at least 3 oscillation related characteristic values exceeding the oscillation alarm threshold value or at least one oscillation related characteristic value and the early warning threshold value within a preset third exceeding range, determining that the early warning level is serious oscillation early warning.
8. An oscillation early warning device of an electric power system is characterized by comprising: the acquisition module is used for setting an initial early warning threshold value and periodically storing various oscillation related characteristic values in the power system; The candidate threshold determining module is used for selecting a target value from the characteristic values at an updating time point as a candidate early warning threshold value, and the preset time point is related to the storage period of the oscillation related characteristic values; The updating module is used for comparing the candidate early warning threshold value with the current early warning threshold value to determine whether to update the early warning threshold value according to the candidate early warning threshold value; And the early warning module is used for carrying out oscillation early warning according to the oscillation related characteristic value and the early warning threshold value.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method according to any of the preceding claims 1-7 when executing the program.
10. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed by a processor, implements the method according to any of the preceding claims 1-7.

Description

Novel power system oscillation early warning method and device, electronic equipment and storage medium Technical Field The present application relates to the field of power technologies, and in particular, to a novel power system oscillation early warning method, apparatus, electronic device, and storage medium. Background In the operation process of the power system, the method accurately detects the abnormal change of the key electric quantity and timely sends out early warning, which is important to guaranteeing the safe and stable operation of the power system. The oscillation phenomenon may cause instability of the power system and even cause a power failure accident. The traditional electrical quantity detection threshold value setting method may lack a dynamic adjustment mechanism and cannot adapt to complex and changeable operation conditions of the power system. Disclosure of Invention The present application aims to solve at least one of the technical problems in the related art to some extent. To this end, the application proposes a method, an apparatus, an electronic device and a storage medium. In one aspect, an embodiment of the present application provides a novel power system oscillation early warning method, including: setting an initial early warning threshold value, and periodically storing various oscillation related characteristic values in the power system; selecting a target value from the characteristic values at an updating time point as a candidate early warning threshold value, wherein the preset time point is related to a storage period of the oscillation related characteristic values; comparing the candidate early warning threshold value with a current early warning threshold value to determine whether to update the early warning threshold value according to the candidate early warning threshold value; And carrying out oscillation early warning according to the oscillation related characteristic value and the early warning threshold value. Optionally, the step of determining the initial pre-warning threshold value includes: According to the historical operation data of the power system, the fluctuation range of the oscillation related characteristic values under different working conditions is statistically analyzed, and the initial early warning threshold value is set by combining the safety and stability operation standard of the power system. Optionally, selecting the target value from the feature values at the updated time point as the candidate early warning threshold value includes: Responding to the time length of the current time point from the updating time point of the last oscillation alarm threshold value, which is equal to the preset updating time length, and determining the current time point as the updating time point; and taking the oscillation related characteristic value between the current updating time point and the adjacent last updating time point as a reference characteristic value, and taking the most value in the reference characteristic value as the candidate early warning threshold value, wherein the updating time length is an integer multiple of the storage period of the oscillation related characteristic value. Optionally, the comparing the candidate early warning threshold value with the current early warning threshold value to determine whether to update the early warning threshold value according to the candidate early warning threshold value includes any one of the following: Responding to the candidate early warning threshold value being larger than the current early warning threshold value, wherein the difference value of the candidate early warning threshold value and the current early warning threshold value exceeds a preset first difference value threshold value, and the power system stably operates under the current working condition, and updating the early warning threshold value according to the candidate early warning threshold value; Responding to the candidate early warning threshold value being smaller than the current early warning threshold value, wherein the difference value of the candidate early warning threshold value and the current early warning threshold value exceeds a preset second difference value threshold value, and if the potential oscillation risk exists in the power system under the current working condition, updating the early warning threshold value according to the candidate early warning threshold value; Otherwise, keeping the current early warning threshold value unchanged. Optionally, the performing oscillation early warning according to the oscillation related characteristic value and the early warning threshold value includes Determining whether the oscillation related characteristic values are abnormal or not according to the early warning threshold values corresponding to the oscillation related characteristic values; and determining an early warning level according to the number of the abnormal oscillation