摘要
电压不平衡度是用于描述三相电压不平衡程度的重要指标,对于如何准确反映这一指标,不同国家和地区的相关标准中提出了多种计算方法。为了便于工程技术人员选择合适的电压不平衡度计算方法,文中详细介绍了8种电压不平衡度计算方法,并用其中5种常用方法计算了多种电压不平衡状态下的电压不平衡度,通过对比计算结果得出各种计算方法的优缺点,最后提出三相三线制系统中电压不平衡度计算公式的选取方法。
Unbalance is an important index to describe unbalance level of three-phase voltage,however,there are various method to calculate the unbalance in relevant standards of different countries and regions.This paper introduces in detail eight methods for unbalance calculating,calculates the unblance under a variety of voltage unbalance by five commonly formulas,and gives the advantages and disadvantages of each formula.Finally,the paper proposes selection method of calculation formula for voltage unbalance in three-phase three-wire systems.
出处
《陕西电力》
2010年第12期55-58,共4页
Shanxi Electric Power
关键词
三相电压不平衡
正序电压
负序电压
相电压
线电压
three-phase voltage unbalance
positive sequence voltage
negative sequence voltage
phase voltage
line voltage
