基于无功有效短路比的交直流交互影响分析.pdfVIP

第 40 卷 第 6 期 电力系统保护与控制 Vol.40 No.6 2012 年 3 月 16 日 Power System Protection and Control Mar. 16, 2012 基于无功有效短路比的交直流交互影响分析 1 1 1 1 2 1 王鹏飞 ，张英敏 ，李兴源 ，陈 虎 ，李斯斯 ，向 月 (1.四川大学电气信息学院，四川 成都 610065；2. 四川电力公司成都电业局, 四川 成都 610021) 摘要：到 2015 年，西南水电基地超特高压直流外送通道将增至 4 个。这些外送直流系统的换流站均存在落点集中、耦合紧 密的特点，复杂的交直流交互影响亟待分析。在多馈入直流量化指标的基础上，考虑换流站的无功消耗，推广定义了多馈入 无功有效短路比，并给出利用其判断系统强弱的标准。针对 2015 年西南水电基地 4 条外送直流丰大运行方式，运用无功有 效短路比进行交互影响分析。仿真结果表明采用改进指标评估多直流系统交互影响的合理性，以及对电网规划具有更准确的 指导意义。 关键词：超特高压；外送直流；交互影响；多馈入直流量化指标；多馈入无功有效短路比 Interaction analysis of AC/DC systems based on multi-infeed effective short circuit ratio 1 1 1 1 2 1 WANG Peng-fei , ZHANG Ying-min , LI Xing-yuan , CHEN Hu , LI Si-si ，XIANG Yue (1. School of Electrical Engineering and Information, Sichuan University, Chengdu 610065, China; 2. Chengdu Electric Power Bureau, Sichuan Electric Power Co., Chengdu 610021, China) Abstract ：Until 2015, the ultra-high voltage DC delivery channels of hydropower base in southwest of China will be increased to four. The converter stations of these delivery DC systems have the characteristics of focused placement and tight coupling. Complex interaction needs to be urgently analyzed. Based on the multi-infeed DC indices, considering the converter station reactive power consumption, this paper generalizes the definition of multi-infeed effective short circuit ratio, and gives the standard to judge the strength of the system. Based on the high water level peak load operation mode of four delivery DC systems in southwest China hydropower base in 2015, it us