Inter-turn Short Circuit Current Analysis for 110 kV Reactor in UHV Substation and Its Protection Improvement

LI Xianpeng; GU Yongdi; TANG Zhiwei; MAO Haibo; JIANG Tao; CHENG Xingmin; ZHU Jianxiong

doi:10.14044/j.1674-1757.pcrpc.2018.03.020

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Inter-turn Short Circuit Current Analysis for 110 kV Reactor in UHV Substation and Its Protection Improvement

更新时间：2024-09-14

- Inter-turn Short Circuit Current Analysis for 110 kV Reactor in UHV Substation and Its Protection Improvement
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 39, Issue 3, Pages: 106-110(2018)
- 作者机构：
  
  国网浙江省电力公司检修分公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2018.03.020
  CLC： TM47
- Published：2018，
- 稿件说明：
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[1]李显鹏,顾用地,唐志伟,毛海波,姜涛,程兴民,朱建雄.特高压站用110 kV低抗匝间短路电流分析及其保护改进[J].电力电容器与无功补偿,2018,39(03):106-110.

LI XIANPENG, GU YONGDI, TANG ZHIWEI, et al. Inter-turn Short Circuit Current Analysis for 110 kV Reactor in UHV Substation and Its Protection Improvement. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 106-110.
[1]李显鹏,顾用地,唐志伟,毛海波,姜涛,程兴民,朱建雄.特高压站用110 kV低抗匝间短路电流分析及其保护改进[J].电力电容器与无功补偿,2018,39(03):106-110. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.020.

LI XIANPENG, GU YONGDI, TANG ZHIWEI, et al. Inter-turn Short Circuit Current Analysis for 110 kV Reactor in UHV Substation and Its Protection Improvement. [J]. Power capacitor & reactive power compensation, 2018, 39(3): 106-110. DOI： 10.14044/j.1674-1757.pcrpc.2018.03.020.

摘要

分析发现某110 k V干式空心电抗器存在运行隐患

单台出现严重的匝间短路、完全烧毁

其保护也可能不动作。保护死区过大是系统中并联干式空心电抗器保护的普遍问题

本文分析了匝间故障时短路电流的影响因素

确定短路电流倍数仅与剩余电抗比和工作电压相关。提出一种基于剩余电抗比的过流保护

保护死区小

能反应轻微匝间短路。新建和改造便利

对各电压等级空心电抗器均适用。在未改造前

可在监控后台设置剩余电抗比虚遥测限额

轻微匝间短路时能及时发出报警信息

提醒运维人员检查处理。

Abstract

It is found that certain 110 k V dry-type air core reactor has hidden trouble in operation.Single unit has such problem as severe inter-turn short circuit

complete burn and no operation of its protection.Excessive protection dead zone is a common problem for shunt dry-type reactor over-current protection in system.The influence factor of short circuit current in case of inter-turn fault is analyzed

and the relationship among short circuit current factor only and residual reactance ratio and operation voltage is defined.A kind of over current protection based on residual reactance ratio with small protection dead zone and reflecting slight inter-turn short circuit.The convenience of upgrade and innovation can be applicable for air core reactor at various voltages.Before innovation

corresponding limit can be set in the substation monitoring system.Alarm information can be sent out in time to remind the operator to check and handle in case of slight inter-turn short circuit.

关键词

特高压干式空心电抗器匝间短路剩余电抗比

Keywords

ultra high voltagedry-type air core reactorinter-turn short circuitresidual reactance ratio

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Research on Magnetic Field Detection of Inter-turn Short Circuit of Dry-type Air-core Reactor Based on Reluctance Effect

Fault Prevention Measures of Outdoor Dry-type Air-core Reactor

Safe Operation and Maintenance of Dry-type Air-core Reactor

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Related Institution

State Grid Liaocheng Power Supply Company

Institute of Electrical Engineering, Chinese Academy of Sciences

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