Lecture Five Standards of Three-phase Voltage Unbalance

Lin Haixue（China Electric Power Research Institute，Beijing 100085，China）

 

作者信息

林海雪，男，中国电力科学研究院，教授级高级工程师。

 

    Abstract This paper describes the main factors that result in three-phase voltage unbalance and its harm，introduces the method for calculation of three-phase voltage unbalance，and elaborates the content and scope of application of the national standard GB　/ T 15543 - 2008 Power Quality — Three-phase Voltage Unbalance，allowable voltage unbalance values，unbalance factor measurement as well as measures for improving three-phase voltage unbalance.

    Key words　National standard　Power quality Voltage unbalance　Point of common coupling（PCC）

    摘　要　阐述引起三相电压不平衡的主要因素及危害，介绍三相不平衡度的计算方法。对国家标准 GB / T 15543 - 2008《电能质量　三相电压不平衡》的内容、适用范围、电压不平衡度的允许值、不平衡度的测量和取值及改善三相不平衡的措施等进行解读。

    关键词　国家标准　电能质量 电压不平衡 公共连接点（PCC）