交直流混联系统直流功率转移对交流电压的影响  

Study on Influence of DC Power Transfer on AC Voltages in Hybrid AC/DC System

作　　者：陈湘[1] 刘兵[2] 任大江[3] 徐友平[2] 唐晓骏[1] 刘志成[2] 马世英[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192 [2]国家电网公司华中分部,湖北省武汉市430077 [3]国网宁夏电力公司经济技术研究院,宁夏回族自治区银川市750001

出　　处：《电网技术》2016年第7期1957-1961,共5页Power System Technology

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.

关 键 词：交直流混联系统 功率转移 电压下降 影响因素 

分 类 号：TM72[电气工程—电力系统及自动化]