基于Xd′计算上海电网短路电流周期分量的研究  

Research on symmetrical short-circuit current calculation of Shanghai electric power grid based on transient reactance

作　　者：肖飞[1] 段开元[2] 靳希[2] 曹炜[2] 杨秀[2] 刘蓓[1] 

机构地区：[1]上海市电力公司,上海200122 [2]上海电力学院,上海200090

出　　处：《华东电力》2009年第10期1735-1739,共5页East China Electric Power

摘　　要：使用PSS/E暂态仿真模块,通过分析外网(华东电网除上海电网以外的部分)发电机对上海电网短路电流周期分量衰减的影响,确定了机电暂态仿真所用的发电机参数和模型,进而对上海电网短路电流周期分量衰减规律进行计算分析。同时,通过计算上海电网基于暂态电抗Xd′的短路电流周期分量,并将其计算结果分别与基于次暂态电抗Xd″的计算结果以及PSS/E机电暂态仿真得出的结果进行比较分析。结果表明,基于暂态电抗Xd′的短路电流周期分量计算方法可在保证有效安全裕度的情况下,一定程度上降低上海电网短路电流计算值。In this paper,the PSS/E dynamic simulation model has been used through analyzing the influence of the decay of the symmetrical short-circuit current caused by the generators of East China power grid except the Shanghai grid.These generators′ parameters and models have been determined through this model.Then these parameters have been used to analyze and calculate the changes of the symmetrical short-circuit current′s decay in Shanghai power grid.And the results have been compared to the symmetrical short-circuit current which is respectively based on and . It can be concluded that the results from the short-circuit current calculation method based on transient reactance can get a smaller short-circuit current than the one from regular calculation method with enough margin. It has somehow reduced the value of the short-circuit current in Shanghai power grid.

关 键 词：短路电流周期分量 次暂态电抗 暂态电抗 PSS/E 

分 类 号：TM713[电气工程—电力系统及自动化]