电力系统电压的不平衡度讨论

Discussion of Voltage Unbalance in Power System

本文讨论了电力系统电压不平衡度的几种工程近似计算方法,对在零序分量取值不同情况下的不平衡度随正、负序分量相位差变化的规律进行了比较,分析了影响各种算法精度和误差的因素,指出各种算法的适用范围。

Some different definitions of voltage unbalance in power system are discussed. The varying relationship between the unbalance and the lagging phase of the negative sequence from the positive is compared according to the various values of the zero sequence. The accuracy and error of the different ways to calculate unbalance are analyzed, and the conditions for these definitions are also presented.