并列运行变压器电压比不一致时无功环流分析与计算  

Analysis and Calculation of Reactive Circulating Current for Inconsistent Voltage Ratio of Parallel-Operation Transformers

作　　者：郭超 石凯萌 马锡良 高竣 邱炜 周波 蔡川 陈星宇 何凯 GUO Chao;SHI Kai-meng;MA Xi-liang;GAO Jun;QIU Wei;ZHOU Bo;CAI Chuan;CHEN Xing-yu;HE Kai(State Grid Sichuan Electric Power Company Chengdu Power Supply Company,Chengdu 610000,China)

机构地区：[1]国网四川省电力公司成都供电公司,四川成都610000

出　　处：《电工电气》2023年第7期27-32,50,共7页Electrotechnics Electric

摘　　要：分析了变压器电压比不一致时无功环流产生的原因,针对三相三绕组变压器两绕组并列运行和三绕组并列运行的两种情况,分别介绍了无功环流计算方法,并通过分析成都电网两起并列运行变压器之间的无功环流异常案例,论证了计算方法的有效性,为后续各供电公司出现类似情况提供了经验参考。The paper first analyzes why the reactive circulating current generates as the transformer voltage ratio is inconsistent.Then,it introduces the calculation methods of reactive circulating current respectively for two-winding parallel operation and three-winding parallel operation of the three-phase three-winding transformer.Thirdly,two abnormal cases of reactive circulating current occurring to parallel-op-eration transformers in Chengdu power grid are analyzed to verify the effectiveness of calculation methods.These calculation methods can provide reference for power supply companies that meet the similar situations.

关 键 词：变压器 电压比 无功环流 

分 类 号：TM401.1[电气工程—电器]