The Influence of Three-phase Unbalance Voltage on Open-delta Protection

YAO Cheng1; NIE Shu-qun2

doi:10.14044/j.1674-1757.pcrpc.2010.01.004

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The Influence of Three-phase Unbalance Voltage on Open-delta Protection

更新时间：2024-09-14

- The Influence of Three-phase Unbalance Voltage on Open-delta Protection
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 31, Issue 1, Pages: 9-11(2010)
- 作者机构：
  
  1. 西安西电电力电容器有限责任公司
  2. 广东南电物资有限公司
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2010.01.004
  CLC： TM772
- Published：2010，
- 稿件说明：
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[1]姚成,聂书群.三相电压不平衡对开口三角保护的影响[J].电力电容器与无功补偿,2010,31(01):9-11.

YAO CHENG1, NIE SHU-QUN2. The Influence of Three-phase Unbalance Voltage on Open-delta Protection. [J]. Power capacitor & reactive power compensation, 2010, 31(1): 9-11.
[1]姚成,聂书群.三相电压不平衡对开口三角保护的影响[J].电力电容器与无功补偿,2010,31(01):9-11. DOI： 10.14044/j.1674-1757.pcrpc.2010.01.004.

YAO CHENG1, NIE SHU-QUN2. The Influence of Three-phase Unbalance Voltage on Open-delta Protection. [J]. Power capacitor & reactive power compensation, 2010, 31(1): 9-11. DOI： 10.14044/j.1674-1757.pcrpc.2010.01.004.

摘要

目前大量采用开口三角保护作为10 kV并联电容器成套装置的不平衡保护

本文分析开口三角保护与电源三相不平衡的关系

主要通过对开口三角保护公式的推导计算

表明只有当电容器装置的三相阻抗不平衡时才能产生开口三角保护电压。当三相阻抗不平衡时

三相电压不平衡可能引起开口三角电压放大。

Abstract

At present

open-delta protection is adopted widely as the unbalance protection of 10 kV shunt capacitor complete set.This paper mainly analyzes the relation between open-delta protection and Three-phase unbalanced power supply.The result

throughout deduced calculation of the open-delta protection formula

shows that open-delta protection voltage occurs only in case of unbalance of the three-phase impedance and

in this case

unbalance of three-phase voltage may cause Open-delta voltage to amplify.

关键词

电容器成套装置开口三角保护三相电压不平衡负序分量内熔丝

Keywords

shunt capacitor complete setopen-delta protectionunbalance of three-phase voltagenegative sequence componentinternal fuse

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Related Institution

西安电力电容器研究所陕西西安710082

Xi’an Power Capacitor Research Insitute

西安电力电容器研究所西安710082

Central south China Transmission and Distribution Equipment Corporation, Ltd. Hainan Branch

NISSIN Electric Wuxi Power Capacitor Company Limited

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