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.
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.
三相电压不平衡对开口三角保护的影响
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.