Calculation of Impulse Coefficient of short-Circuit Current in Case of Non-simultaneous Short-Circuit in three Phase A.C. Circuit

Shang Zhengqiu

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Calculation of Impulse Coefficient of short-Circuit Current in Case of Non-simultaneous Short-Circuit in three Phase A.C. Circuit

更新时间：2025-05-17

- Calculation of Impulse Coefficient of short-Circuit Current in Case of Non-simultaneous Short-Circuit in three Phase A.C. Circuit
- High VoltageApparatus Issue 6, Pages: 22-26(1987)
- 作者机构：
  
  西安交通大学
- 作者简介：
- 基金信息：
- DOI：
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- Published：1987
- 稿件说明：
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[1]尚振球.三相交流电路非同期短路时短路电流冲击系数的计算[J].高压电器,1987(06):22-26.

Shang Zhengqiu. Calculation of Impulse Coefficient of short-Circuit Current in Case of Non-simultaneous Short-Circuit in three Phase A.C. Circuit[J]. High voltageapparatus, 1987, (6): 22-26.
[1]尚振球.三相交流电路非同期短路时短路电流冲击系数的计算[J].高压电器,1987(06):22-26. DOI：

Shang Zhengqiu. Calculation of Impulse Coefficient of short-Circuit Current in Case of Non-simultaneous Short-Circuit in three Phase A.C. Circuit[J]. High voltageapparatus, 1987, (6): 22-26. DOI：

摘要

理论分析表明

三相交流电路非同期短路时短路电流的冲击系数Kc

是首先短路两相中短路瞬间领先相的电压相位角、随后短路相的时延以及时间的函数。通过计算机对此三变量函数求极值后

得出首先短路两相中领先相的冲击系数最大。当电路时间常数为45ms时

Kc=2.107

它为三相同期短路时的1.17倍。

Abstract

Theoretical analysis shows that

the impulse coefficient Kc of short circuit current in case of non-simultaneous short circuit in three phase A.C.circuit is a function of three variable.It is obtained by means of computer

Kc of lead phase circuit in two first short circuit phase has maximum.If the time constant of the circuit is 45ms

Kc=2.107

which is 1.17 times the valae in case of three simultaneous short circuit.

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