Study on Inter-turn Short Circuit Fault Monitoring of Dry-type Air-core Reactor Based on Phase Difference Change

WANG Zhihong; LI Wei; YIN Xu; WU Shibao; ZHU Jiayun; PAN Zhimin; LIAO Jing

doi:10.14044/j.1674-1757.pcrpc.2024.04.010

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Study on Inter-turn Short Circuit Fault Monitoring of Dry-type Air-core Reactor Based on Phase Difference Change

Reactive Power Compensation and Filter | 更新时间：2024-09-15

- Study on Inter-turn Short Circuit Fault Monitoring of Dry-type Air-core Reactor Based on Phase Difference Change
- Power Capacitor & Reactive Power Compensation Vol. 45, Issue 4, Pages: 71-78(2024)
- 作者机构：
  
  1.国网湖南省超高压变电公司，长沙　 410009
  2.变电智能运检国网湖南省电力有限公司实验室，长沙　 410009
  3.中国电力科学研究院有限公司，北京　 100192
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2024.04.010
  CLC：
- Published：2024-08，
  
  Received：13 February 2023，
- 稿件说明：
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WANG ZHIHONG, LI WEI, YIN XU, et al. Study on Inter-turn Short Circuit Fault Monitoring of Dry-type Air-core Reactor Based on Phase Difference Change. [J]. Power capacitor & reactive power compensation, 2024, 45(4): 71-78.
DOI：

WANG ZHIHONG, LI WEI, YIN XU, et al. Study on Inter-turn Short Circuit Fault Monitoring of Dry-type Air-core Reactor Based on Phase Difference Change. [J]. Power capacitor & reactive power compensation, 2024, 45(4): 71-78. DOI： 10.14044/j.1674-1757.pcrpc.2024.04.010.

摘要

干式空心电抗器是电力系统的重要设备之一，其失效破坏形式主要表现为匝间短路，在电抗器匝间短路故障早期，发出有效预警具有重要意义。干式空心电抗器在健康运行时，电压电流相位差为固定值，匝间短路后相位差随之变化，基于此提出一种相位差变化特性的匝间短路在线监测方法。建立匝间短路场-路耦合模型，根据仿真结果整定匝间短路的相位差变化阈值；采用SOGI-PLL结合apFFT算法实时监测相位差的变化特性；搭建匝间短路在线监测系统，并对其性能进行了测试。结果表明：在线监测系统既能灵敏地发现匝间短路，又能精确地测量相位差，满足了灵敏性和可靠性的要求。研究工作验证了基于电压电流相位差变化的匝间短路监测方法的可行性，并为其实现方法提供了参考。

Abstract

Dry-type air-core reactor is one of the important equipment in power system

and its failure mode is mainly inter-turn short circuit. It is therefore of great significance to issue effective warning in the early stage of inter-turn short circuit fault. In case of healthy operation of the dry-type air core reactor

the phase difference of voltage and current is a fixed value

and the phase difference changes after inter-turn short circuit. Based on this

a kind of online monitoring method for inter-turn short circuit with phase difference change characteristics is proposed. The field-circuit coupling model of inter-turn short circuit is set up

and the change threshold of phase difference of inter-turn short circuit is set in accordance with the simulation results; SOGI-PLL combined with apFFT algorithm is used to monitor the change characteristics of phase difference in real time. Then

the on-line monitoring system for inter-turn short circuit is set up and its performance is tested. The result shows that the on-line monitoring system can not only find out inter-turn short circuit sensitively

but also measure the phase difference accurately

which meets the requirements of both sensitivity and reliability. The feasibility of inter-turn short circuit monitoring method based on the phase difference change of voltage and current is verified by the research work and a reference for its implementation method is provided.

关键词

干式空心电抗器匝间短路相位差在线监测SOGI-PLL结合apFFT算法

Keywords

dry-type air-core reactorinter-turn short circuit faultphase differenceonline monitoringSOGI-PLL combined with apFFT algorithm

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