摘要
借鉴两端直流系统中换相失败的研究结果和熄弧角公式,运用数学和电路基本理论,推导常规控制方式下多端直流(MTDC)系统和多馈入直流(MIDC)系统的熄弧角模型,分析影响换相失败的各种因素,阐述复杂直流输电系统中发生换相失败的一般规律:MTDC系统中,定电压控制的逆变站的参数会对系统中所有逆变站的换相失败产生影响;受影响的逆变站由于自身运行参数、控制方式的变化,可能形成复杂的换相失败故障及故障恢复过程;MIDC系统中,一个逆变站的换相失败除了受自身参数的影响,还受与之相耦合的其他逆变站参数的影响。
Based on the conclusions of commutation failure in HVDC system and extinct-angle formulas of HVDC, this paper deduces extinct-angle formulas of MTDC and MIDC systems in normal control and analyzes the principal factors that might lead to commutation failure. General rules are expatiated. In MTDC system, parameters of certain voltage-controlled inverter may affect all inverters and result in complicated fault and recovery process due to the variety of their running parameters and control modes. In MIDC system, not only parameters of coupling inverters but also self-parameters of inverter may lead it to complicated commutation failure.
出处
《电力系统自动化》
EI
CSCD
北大核心
2005年第11期29-33,共5页
Automation of Electric Power Systems
