母线电压不平衡问题暂态分析方法研究  

Research on Transient Analysis Method for Bus Voltage Unbalance

作　　者：黎宏飞 高宗宝 吴达 吕银 LI Hongfei;GAO Zongbao;WU Da;LU Yin(China Energy Science and Technology Research Institute Co.,Ltd.,Chengdu 610000,China)

机构地区：[1]国家能源集团科学技术研究院有限公司,四川成都610000

出　　处：《电工技术》2023年第7期137-141,共5页Electric Engineering

摘　　要：近年来,配电网系统经常出现母线电压不平衡问题,其中由谐振造成电压不平衡的问题严重威胁系统的安全运行,而常规测试和分析不能有效判断电压不平衡问题产生的根本原因,因此提出了一套暂态测试方法。通过对一起电磁式PT谐振引起的电压不平衡问题进行实测和分析,提出了解决对策。实践证明该测试方法可为配电网系统过电压、PT保险频繁熔断、电压不平衡问题的分析提供可靠、有效的数据支撑。In recent years,bus voltage imbalance often occurs in power grid system,among which the voltage imbalance caused by resonance seriously threatens the safe operation of the system.Through routine testing and analysis,the root cause of voltage imbalance cannot be effectively judged.Therefore,a set of transient test methods is proposed.By measuring and analyzing the voltage imbalance problem caused by electromagnetic PT resonance,a countermeasure is proposed.Practice has proved that this test method can provide reliable and effective data support for the analysis of overvoltage,frequent fusing of PT insurance and voltage imbalance in distribution network system.

关 键 词：电压不平衡 铁磁谐振 电磁式PT 过电压 

分 类 号：TM591[电气工程—电器] TM835