摘要
针对交直流混联系统中,直流输送功率下降或发生闭锁故障情况下,其盈余功率通过交流通道转移时,交流通道上电压稳定薄弱点的电压下降幅度进行了理论推导和仿真分析,明确了直流功率转移对交流通道电压下降幅度影响的主要因素:直流功率变化与交流母线电压之间的耦合程度以及交流母线自身的电压稳定强度,提出了能够识别交流系统中受到电压稳定限制抵御直流功率转移能力最弱母线的判定指标,并在我国华中电网这一实际电网系统中进行了仿真验证,结果与理论分析完全相符。
In hybrid AC/DC system, AC bus voltage would drop due to power transfer caused by DC blocked or other faults. This article pointed out followingmajor factors of DC power transfer influencing AC bus voltages droop： coupling degree between DC power variation and AC bus voltage and voltage stability strength of AC bus itself. Then an index for finding the weakest AC bus in resisting DC power transfer was proposed. Finally, for a real hybrid AC/DC system in Central China power grid, simulation results completely conformedto theoretical analysis.
出处
《电网技术》
EI
CSCD
北大核心
2016年第7期1957-1961,共5页
Power System Technology
