Analysis and Improvement Measures of Inductive Voltage Transformer Fault Caused by Intermittent Grounding

NIU Bo; WU Xutao; ZHANG Guoyong; MA Feiyue; TAN Dongxian; HE Shuai

doi:10.13296/j.1001-1609.hva.2020.10.012

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Analysis and Improvement Measures of Inductive Voltage Transformer Fault Caused by Intermittent Grounding

更新时间：2025-04-26

- Analysis and Improvement Measures of Inductive Voltage Transformer Fault Caused by Intermittent Grounding
- High VoltageApparatus Vol. 56, Issue 10, Pages: 70-74+83(2020)
- 作者机构：
  
  1. 国网宁夏电力有限公司电力科学研究院
  2. 安徽正广电电力技术有限公司
  3. 上海雷博司电气股份有限公司
  4. 国网宁夏电力有限公司吴忠供电公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.10.012
  CLC： TM451
- Published：2020
- 稿件说明：
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[1]牛勃,吴旭涛,张国勇,马飞越,谭东现,何帅.一起系统间歇性接地导致电磁式电压互感器的分析及改进措施[J].高压电器,2020,56(10):70-74+83.

NIU Bo, WU Xutao, ZHANG Guoyong, et al. Analysis and Improvement Measures of Inductive Voltage Transformer Fault Caused by Intermittent Grounding[J]. High voltageapparatus, 2020, 56(10): 70-74+83.
[1]牛勃,吴旭涛,张国勇,马飞越,谭东现,何帅.一起系统间歇性接地导致电磁式电压互感器的分析及改进措施[J].高压电器,2020,56(10):70-74+83. DOI： 10.13296/j.1001-1609.hva.2020.10.012.

NIU Bo, WU Xutao, ZHANG Guoyong, et al. Analysis and Improvement Measures of Inductive Voltage Transformer Fault Caused by Intermittent Grounding[J]. High voltageapparatus, 2020, 56(10): 70-74+83. DOI： 10.13296/j.1001-1609.hva.2020.10.012.

摘要

电磁式电压互感器一次侧用压敏消谐装置串接于一次侧中性点与地之间

通过谐振过程中装置两端施加电压进行铁磁谐振抑制

该种谐振抑制措施在谐振过程易发生保险熔断、互感器炸裂

影响系统稳定运行。文中通过对一起因系统间歇性接地导致电磁式电压互感器炸裂故障原因分析

提出一种基于PTC热敏电阻的电磁式电压互感器一次侧用流敏消谐装置

其通过谐振过程中装置两端通流状态进行铁磁谐振抑制。试验表明

流敏消谐装置在较短的消谐时间内可以将励磁涌流抑制在0.2 A以下

涌流抑制能力较压敏消谐装置优

可以解决因系统间歇性接地导致保险熔断、互感器炸裂的问题。

Abstract

Harmonic eliminator of voltage dependent resistance type is series between the neutral point of the primary side of the inductive voltage transformers and the ground

whichis used to suppress the ferromagnetic resonance by applying a voltage across the device during the resonance process.This resonance suppression measure is prone to insurance fuses and inductive voltage transformers burst during the resonance process.This paper analyzes the cause of a burst failure of the inductive voltage transformers due to the intermittent grounding of the system

and proposes a PTC thermistor-based harmonic eliminator of current dependent resistance type device for the primary side of the inductive voltage transformers

and ferromagnetic resonance suppression is performed in the through-current state.Tests show that the harmonic eliminator of current dependent resistance type can suppress the excitation inrush current under 0.2 A in a short resonance elimination time

and the surge suppression ability is better than the harmonic eliminator of voltage dependent resistance type

which can solve the insurance fuses and inductive voltage transformers burst caused by the intermittent grounding of the system.

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