Active power distribution network fault identification method and system, and computer readable storage medium

An active distribution network, fault identification technology, applied in fault location, system integration technology, information technology support system, etc., can solve problems such as poor identification accuracy

Pending Publication Date: 2021-03-26
GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of poor identification accuracy in the fault identification method in the prior art, the present invention proposes an active distribution network fault identification method

Method used

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  • Active power distribution network fault identification method and system, and computer readable storage medium
  • Active power distribution network fault identification method and system, and computer readable storage medium
  • Active power distribution network fault identification method and system, and computer readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Such as figure 1 As shown, an active distribution network fault identification method includes the following steps:

[0069] S1: Build a measurement data set, select some data in the measurement data set as the online data set and historical data set, and standardize the online data set and historical data set;

[0070] S2: Determine the measurement evaluation index, specifically including steps s21 to s24

[0071] s21: Solve the maximum variance deviation direction of the online data in the online data set relative to the historical data in the historical data set;

[0072] s22: Convert the solution of the maximum variance deviation direction into the solution of the generalized eigenvalue;

[0073] s23: Establish an evaluation index based on the ratio of the largest singular value of the covariance matrix;

[0074] s24: Determine the comprehensive evaluation index of measurement;

[0075] S3: Fault diagnosis: determine the fault location according to whether the d...

Embodiment 2

[0125] An active distribution network fault identification system, including a memory and a processor, the memory includes an active distribution network fault identification method program and transmits the program to the processor, and the processor is used to execute the method in Embodiment 1 according to the instructions in the program Active distribution network fault identification method.

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Abstract

The invention relates to the technical field of power distribution network fault identification, and discloses an active power distribution network fault identification method comprising the followingsteps: S1, constructing a measurement data set, selecting a plurality of data in the measurement data set as an online data set and a historical data set, and performing standardization processing onthe online data set and the historical data set; S2, determining a measurement evaluation index; S3, fault diagnosis: determining a fault position according to whether the measurement comprehensive evaluation index is within an index range, and judging a fault occurrence moment according to whether evaluation results at different moments exceed a limit; and S4, outputting diagnosis results of thefault position and the fault moment in the system. According to the method, analysis and judgment can be performed only based on the measurement data of the [mu]PMU, dependence on a system model is avoided, good practicability is achieved, the suspicious fault position can be effectively and accurately positioned by using the proposed comprehensive evaluation result, troubleshooting is facilitated, and the accuracy of fault identification is effectively improved.

Description

technical field [0001] The present invention relates to the technical field of distribution network fault identification, and more specifically, to a method, system and computer-readable storage medium for active distribution network fault identification. Background technique [0002] With a large number of distributed new power sources connected to the power distribution system, the structure of the power distribution network is becoming more and more complex and presents new characteristics and characteristics. These changes make the fault characteristics of the active distribution network quite different from those in the traditional distribution network, which makes the existing relay protection of the distribution network prone to malfunction and refusal. Accurate identification of fault location and determination of fault time not only effectively narrow the scope of fault location, but also provide support for subsequent fault location, which is one of the important m...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/22Y02E40/70Y02E60/00
Inventor 黄达文游林辉胡峰孙仝陈政张谨立宋海龙王伟光梁铭聪黄志就何彧陈景尚谭子毅冯志华鄢峻雯李志鹏
Owner GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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