Influence of Closing Inrush Current of 35 kV Shunt Capacitors Group on CVT Fuse

ZHOU Chunyang; LAI Jie; LIU Kai; YUAN Hai

doi:10.14044/j.1674-1757.pcrpc.2016.04.012

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Influence of Closing Inrush Current of 35 kV Shunt Capacitors Group on CVT Fuse

更新时间：2024-09-14

- Influence of Closing Inrush Current of 35 kV Shunt Capacitors Group on CVT Fuse
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 37, Issue 4, Pages: 58-61(2016)
- 作者机构：
  
  1. 中国南方电网超高压输电公司广州局
  2. 广东技术师范学院天河学院
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2016.04.012
  CLC： TM63;TM563
- Published：2016，
- 稿件说明：
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[1]周春阳,赖劼,刘凯,袁海.35kV并联电容器组合闸涌流对CVT熔断器的影响[J].电力电容器与无功补偿,2016,37(04):58-61.

ZHOU CHUNYANG, LAI JIE, LIU KAI, et al. Influence of Closing Inrush Current of 35 kV Shunt Capacitors Group on CVT Fuse. [J]. Power capacitor & reactive power compensation, 2016, 37(4): 58-61.
[1]周春阳,赖劼,刘凯,袁海.35kV并联电容器组合闸涌流对CVT熔断器的影响[J].电力电容器与无功补偿,2016,37(04):58-61. DOI： 10.14044/j.1674-1757.pcrpc.2016.04.012.

ZHOU CHUNYANG, LAI JIE, LIU KAI, et al. Influence of Closing Inrush Current of 35 kV Shunt Capacitors Group on CVT Fuse. [J]. Power capacitor & reactive power compensation, 2016, 37(4): 58-61. DOI： 10.14044/j.1674-1757.pcrpc.2016.04.012.

摘要

本文通过对35 k V电容式电压互感器（CVT）高压侧熔断器熔断时刻故障录波数据的分析

发现高压熔断器熔断的主要原因不是铁磁谐振产生的过电压。利用Matlab/Simulink仿真平台

建立了35 k V母线CVT仿真模型

对并联电容器组投入时刻CVT一次侧的暂态电压和电流进行了仿真分析。得出结论:电容器组投入时CVT一次侧流过的暂态高频电流是导致熔断器频繁熔断的主要原因

且该电流大小与合闸时刻电压的相位角有关。最后根据工程实践

给出了增大熔断器额定电流或取消熔断器保护的建议。

Abstract

In this paper

through the analysis of the fault record data at the fusing moment in 35 k V CVT HV side

the main reason of fuse of HV fuse has been found that it is not due to the ferroresonance overvoltage. CVT simulation model of 35 k V busbar is set up by way of Matlab/Simulation platform and the transient voltage and current of the primary side of CVT at the switching of capacitor bank is simulated and analyzed. It is concluded that the main reason of frequent fuse of fuse is due to the transient high frequency current passing through the primary side of CVT in the switching of capacitor bank

and the current magnitude is related to the phase angle of voltage at the moment of closing operation. Finally

such suggestion as increase of rated current of fuse or elimination of fuse protection is given in accordance with the engineering practice.

关键词

电容式电压互感器（CVT）高压熔断器暂态电压高频电流相位角

Keywords

capacitor voltage transformer（CVT）high-voltage fusestransient voltagehigh frequency currentphase angle

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