逆变器交流侧等值工频电气量暂态特性分析  

Study on Transient Characteristics of Equivalent Power-frequency Components in AC Side of Inverter

作　　者：袁静 陈林 吴长敏 叶辉 

机构地区：[1]雅砻江流域水电开发有限公司,四川成都610066

出　　处：《四川电力技术》2016年第1期63-65,共3页Sichuan Electric Power Technology

摘　　要：随着交直流混联系统在中国的逐步形成,交流系统的运行环境变得更为复杂。详细分析了逆变器交流侧等值工频电气量暂态特性,分析发现逆变器交流侧等值电流的暂态特性与纯交流系统完全不同,但电压的暂态特性变化不大。并基于暂态特性的分析进一步指出了在交直流互联系统当中,交流侧传统的继电保护可能存在的问题。最后基于PSCAD/EMTDC仿真验证了结论的正确性。With the completion of AC/DC interconnected system in China, the operation environment of AC system becomes more complicated. Firstly, the transient characteristics of equivalent power - frequency components in AC side of inverter are analyzed in detail. Then, the results show that the effect of AC/DC interconnected system on AC voltage is little. On the con- traiT, the power- frequency current is affected by the AC/DC interconnected system significantly. Then, the possible prob- lems of traditional relay protection are presented based on the analysis of the transient characteristics of power - frequency com- ponents. At last, the simulation results based on PSCAD/EMTDC olafform orove the conclusion to be correct.

关 键 词：交直流互联系统 逆变器 低压限流 继电保护 

分 类 号：TM464[电气工程—电器]