换相技术在三相负荷不平衡治理中的应用研究  

Study on the Application of Phasing Rotation Technology in Three-phase Imbalance Control

作　　者：张孝云 张洪波 刘鼎立 单冠华 李建 刘宗振 ZHANG Xiaoyun;ZHANG Hongbo;LIU Dingli;SHAN Guanhua;LI Jian;LIU Zongzhen(Shandong Electrical Engineering & Equipment Group New Energy Technology Co.,Ltd.,Jinan 250101,China)

机构地区：[1]山东电工电气集团新能科技有限公司,济南250101

出　　处：《电力电容器与无功补偿》2019年第2期131-135,159,共6页Power Capacitor & Reactive Power Compensation

摘　　要：配电台区三相负荷不平衡会对配电网的供电安全、供电质量和经济运行产生不良影响,是配电网薄弱环节中亟待解决的问题之一。目前,治理台区三相负荷不平衡最直接、最有效的技术措施就是根据三相负荷不平衡程度动态改变单相负荷接入的相序,将台区三相不平衡控制在规定的范围内。本文构建了换相数学模型,详细分析了换相控制策略,用基于换相控制技术的三相负荷不平衡自动换相装置,进行了过零投切换相实验和配电台区工程化应用实验,实验结果表明,换相控制技术在配电台区三相负荷不平衡治理上是可行的。The three-phase unbalanced load in power distribution area will have adverse effects on power supply safety,power supply quality and economic operation of distribution network is one of the urgent problems to be solved in the weak links of power distribution network.At present,the most direct and effective technical measure for controlling the three-phase imbalance of the area is dynamically changing the phase sequence of single-phase load and controlling the three-phase imbalance within the specified range.In this paper,the mathematical model of phasing rotation is established,the phasing rotation strategy is analyzed in detail and the experiment zero switching phasing and engineering application of distribution area are performed by the use of three-phase load imbalance auto phasing device based on phasing rotation technology.It is shown by the experimental result that the control of phasing rotation control technology to the threephase load imbalance of distribution area is feasible.

关 键 词：三相负荷不平衡 过零投切换相 换相数学模型 换相策略 

分 类 号：TM761[电气工程—电力系统及自动化]