多馈入直流系统交互作用因子的影响因素分析  

Analysis of Influencing Factors of Multi-Infeed HVDC System Interaction Factor

作　　者：邵瑶[1] 汤涌[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100192

出　　处：《电网技术》2013年第3期794-799,共6页Power System Technology

基　　金：国家电网公司重大专项项目(SGCC-MPLG001-2012)~~

摘　　要：多馈入交互作用因子(multi-feed interaction factor,MIIF)是一种能有效衡量多馈入交直流系统中直流系统间相互作用大小的指标。理论分析了直流落点间电气距离、受端交流系统等值阻抗对MIIF的影响,详细研究了MIIF与受端交流系统强弱评估指标—多馈入短路比(multi-infeed shortcircuit ratio,MISCR)的关系。研究结果表明,MIIF随直流落点间电气距离的减小而增大;其他回直流对某一回直流的MIIF随该回直流逆变侧交流系统等值阻抗的增大而增大;保持直流落点距离不变,MIIF与MISCR成反比关系;保持交流系统等值阻抗不变,直流i、j间的MIIF与第i回直流的MISCR成反比关系,与第j回直流的MISCR成正比关系。两馈入交直流算例系统的分析结果验证了所得结论的正确性。Multi-feed interaction factor（MIIF） is an effective index of measuring interactions between DC systems in multi-infeed AC/DC system.The impact of the electrical distance between DC placements and the equivalent impedance of receiving-end AC system to MIIF are analyzed respectively.The relationship between MIIF and multi-infeed short circuit ratio（MISCR） which is an effective indicator evaluating the strength of receiving-end AC system is studied.The results show that,MIIFs increase with the decrease of the electrical distances between DC placements;MIIFs of other DCs to a certain DC increase with the growth of the DC’s equivalent impedance of receiving-end AC system.With the electrical distance between DC placements unchanged,MIIF and MISCR is an inversely proportional relationship.If the equivalent impedances of receiving-end AC systems are unchanged,MIIF between DC i and j is inversely proportional to the MISCR of DC i,and proportional to the MISCR of DC j.The analysis results of two-infeed DC test system have verified the correctness of the conclusions.

关 键 词：多馈入直流输电系统 多馈入交互作用因子 多馈入短路比 

分 类 号：TM744[电气工程—电力系统及自动化]