摘要
通过电磁暂态仿真程序建立了电网中实际运行的直流输电系统的详细模型,分析了直流输电系统换相失败过程中电气量的详细变化过程、换相失败的持续时间、对交流电网的影响,以及换相失败引起直流闭锁的情况,并对落点上海的直流输电系统在实际运行中的换相失败情况进行统计分析。研究结果表明,换相失败会导致直流电流、电压、功率等电气量发生剧烈波动,但持续时间通常不超过100 ms,对交流系统的冲击较为短暂,同时换相失败造成直流闭锁的概率很低。
By means of electromagnetic transient simulation program a detailed model of HVDC power transmission system actually operated in current power grids is built, and detailed variation of electric quantities during the commutation failure process in HVDC power transmission system, the duration of commutation failure and its impacts on AC power transmission grid as well as DC block caused by commutation failure are analyzed. The statistical analysis on commutation failure in HVDC power transmission system with receiving end in Shanghai is performed. Research results show that commutation failure leads to severe fluctuation of such electrical quantities as DC current, DC voltage and DC power, however the duration of the fluctuations usually is not longer than lOOms, so its impact on AC power system is transitory, meanwhile the there is low probability of DC block caused by commutation failure.
出处
《电网技术》
EI
CSCD
北大核心
2012年第6期266-271,共6页
Power System Technology
关键词
电磁暂态仿真
直流详细模型
换相失败
直流闭锁
运行情况
统计分析
electromagnetic transient simulation
detailedmodel of HVDC power transmission system
commutationfailure
DC block
operation condition
statistical analysis
