Review of Breakdown Fault Research in Potential Transformer (PT)of Distribution Network and Prospect for Operation and Maintenance Technologies

ZHAO Shutao; ZHOU Ziyu

doi:10.13296/j.1001-1609.hva.2026.01.013

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Review of Breakdown Fault Research in Potential Transformer (PT)of Distribution Network and Prospect for Operation and Maintenance Technologies

Research & Analysis | 更新时间：2026-04-13

- Review of Breakdown Fault Research in Potential Transformer (PT)of Distribution Network and Prospect for Operation and Maintenance Technologies
- High Voltage Apparatus Vol. 62, Issue 1, Pages: 103-111(2026)
- 作者机构：
  
  华北电力大学电气与电子工程学院，河北保定　071003
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.01.013
  CLC：
- Received：11 July 2025，
  
  Revised：2025-10-07，
  
  Published：16 January 2026
- 稿件说明：
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ZHAO Shutao, ZHOU Ziyu. Review of Breakdown Fault Research in Potential Transformer (PT)of Distribution Network and Prospect for Operation and Maintenance Technologies[J]. High Voltage Apparatus, 2026, 62(1): 103-111.
DOI：

ZHAO Shutao, ZHOU Ziyu. Review of Breakdown Fault Research in Potential Transformer (PT)of Distribution Network and Prospect for Operation and Maintenance Technologies[J]. High Voltage Apparatus, 2026, 62(1): 103-111. DOI： 10.13296/j.1001-1609.hva.2026.01.013.

摘要

现代电网以消纳冲击性新能源、接入大功率非线性负荷为背景，冲击和谐波对PT安全运行提出更严峻考验。深入研究当前PT击穿故障成因刻不容缓，针对近年来配网PT击穿及爆炸事故频发、故障机理研究不深现状，从配网PT电路模型出发，详细剖析PT劣化缺陷诱因及防护措施的研究成果，归纳总结目前PT故障研究瓶颈，指出解决问题的新思路——挖掘PT缺陷底层逻辑，研究现代电网对PT端口的影响及PT冲击极端条件，结合数字化网络化技术提高PT自身振荡防护能力以适应现代电力设备智慧运维要求。

Abstract

Modern power grids

characterized by the integration of intermittent renewable energy sources and highpower nonlinear loads

face increasingly severe challenges from surges and harmonics

which impose stricter demands on the safe operation of potential transformer (PT) . It is urgent to conduct in-depth research on the causes of current PT breakdown faults. In view of the frequent occurrence of PT breakdown and explosion accidents in the distribution network in recent years and the lack of in-depth research on the fault mechanism

the research results of the PT defect causes and protective measures are conducted in detail based on the PT circuit model of the distribution network

the current research bottlenecks of PT faults are summarized and concluded

and the new ideas to solve the problem is pointed out

that is

mining the underlying logic of PT defects

studying the impact of modern power grids on PT terminal and impact extreme conditions of the PT terminal

combining digital network technology to improve PT's own oscillation protection capability so to adapt to the requirements of intelligent operation and maintenance of modern power equipment.

关键词

Keywords

references

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