摘要
换相失败是HVDC系统最常见的故障之一。通过分析换流器换相失败的机理,归纳了HVDC换相失败的影响因数及判据。以南方电网2010年数据为基础,采用PSCAD/EMTDC对云广±800 kV特高压直流输电系统建立了详细的电磁暂态仿真模型,并分析了一次系统和控制系统的具体结构。对该直流输电系统逆变侧换流母线发生三相接地短路和单相接地短路故障的情况进行了仿真分析。仿真结果表明,云广特高压直流输电系统故障后发生换相失败,但由于该系统的高度可控性,故障切除后系统从换相失败中恢复性能良好。
Commutation failures are very dynamic events in HVDC transmission systems. The influencing factors and criterion of HVDC commutation failure are concluded based on the analysis of the mechanism of commutation failure. According to the data of CSG in 2010, a detailed electromagnetic transient model of Yun - Guang UHVDC transmission system is established u- sing PSCAD/EMTDC, and the structures of primary, system and control system are analyzed. The three - phase and single - phase grounding faults of inverter commutation bus are simulated. The simulation results show that the commutation failure occurs when there is fault in Yun - Guang UHVDC transmission system, but it recovers from commutation failure effectively after the fault is cleared due to the high controllability of the system.
出处
《四川电力技术》
2009年第1期1-4,90,共5页
Sichuan Electric Power Technology
基金
国家重点基础研究专项经费资助项目(2004CB217907)
国家自然科学基金项目(50595412)
国家科技支撑计划(2008BAA13B01)
关键词
云广特高压
换相失败
恢复
仿真
Yun - Guang UHVDC
commutation failure
recovery
simulation
