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.
出处
《现代电力》
2008年第4期20-24,共5页
Modern Electric Power
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
multi-infeed direct current system
electromagnetic transient simulation
commutation failures
critical weak coupling impedance
