基于PSCAD/EMTDC的MIDC输电系统换相失败的仿真研究  

Commutation Failure Simulation Study of MIDC Transmission System Based on PSCAD/EMTDC

作　　者：孙志媛[1] 孙艳[2] 

机构地区：[1]广西电力试验研究院有限公司,广西南宁530023 [2]广西大学电气工程学院,广西南宁530004

出　　处：《现代电力》2008年第4期20-24,共5页Modern Electric Power

摘　　要：针对使用一个简单的导纳元件来反映多馈入(MIDC)输电系统间的动态响应的不足,首次提出采用一种输电线路模型来模拟MIDC系统中多个逆变站间的耦合关系。在CIGRE HVDC标准测试系统模型的基础上建立了3馈入直流输电系统模型,并在EMTDC电磁暂态环境下,仿真分析了MIDC系统逆变侧交流系统强度、子系统间的电气距离等对弱耦合临界阻抗的影响,得出了MIDC系统多个逆变站同时换相失败的一般规律。Against the deficiency of admittance in reflecting the dynamic response in the multi-infeed direct current （MIDC） system, the transmission line models are applied. Based on the CIGRE HVDC benchmark model, a tri-infeed DC system is established using the transient simulation software EMTDC. The effect of the AC system strength and coupling impedance on the critical weak coupling impedance are analyzed. The common law of all the inverters suffer from simultaneous commutation failures is concluded.

关 键 词：多馈入直流系统 电磁暂态仿真 换相失败 弱耦合临界阻抗 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM743