一种配变三相负荷不平衡的自动均衡控制方法  

An automatic balancing control method on unbalanced three-phase loads of distribution transformer

作　　者：赵波 胡娟 程怡捷 祁欢欢 ZHAO Bo;HU Juan;CHENG Yijie;QI Huanhuan(School of Automatic, Beijing Information Science and Technology University, Beijing 100192,China;China Electric Power Research Institute, Beijing 100192;State Grid Changsha Power Supply Company, Changsha 410015,China;Global Energy Internet Research Institute Co., Ltd., Beijing 102209,China)

机构地区：[1]北京信息科技大学自动化学院,北京100192 [2]中国电力科学研究院有限公司,北京100192 [3]国网长沙供电公司,湖南长沙410015 [4]全球能源互联网研究院有限公司,北京102209

出　　处：《电力科学与技术学报》2022年第1期41-47,共7页Journal of Electric Power Science And Technology

基　　金：新能源与储能运行控制国家重点实验室开放基金(DGB51201901183)。

摘　　要：配电网中单相负荷的大量接入导致三相负荷不平衡,为解决配电网中三相负荷不平衡带来的一系列危害,首先提出一种配变三相不平衡负荷自动均衡控制方法,以降低配变的三相不平衡度;然后系统地分析换相式不平衡负荷自动均衡控制系统的结构,设计控制流程及其换相策略,并详细说明基于复合式开关的换相单元的断路器和晶闸管的控制流程;最后建立配变三相不平衡的仿真模型,验证控制策略和流程的正确性。The integration of a large number of single-phase loads in distribution networks could lead to the imbalance of three-phase power flow.In order to eliminate a series of hazards caused by the unbalanced three-phase loads in distribution networks,an automatic balance control method is proposed to mitigate the degree of the three-phase unbalance of the distribution transformer.Subsequently,the structure of the commutation type unbalanced load automatic balance control system is systematically analyzed,and the commutation control flow and commutation strategy are further designed.The control flow of the circuit breaker and thyristor of the commutation unit based on the composite switch is elaborated.Finally,a three-phase unbalanced simulation model of the distribution transformer is established to verify the effectiveness of the proposed control strategy and control flow.

关 键 词：三相不平衡负荷 自动均衡控制 换相单元 机械式开关 复合式开关 

分 类 号：TM761[电气工程—电力系统及自动化]