电流互感器饱和对单元件横差保护影响的仿真分析  

Influence of Current Transformer Saturation on Unit-Transverse Differential Protection and Its Countermeasures

作　　者：邰能灵[1] 侯志俭[1] 李晓华[2] 尹项根[2] 陈德树[2] 

机构地区：[1]上海交通大学电力学院,上海200030 [2]华中科技大学电力工程系,武汉430074

出　　处：《上海交通大学学报》2002年第2期259-262,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目 ( 5 0 10 70 0 7)

摘　　要：针对电流互感器 (CT)严重饱和会影响单元件横差保护的动作性能问题 .采用 ATP(Alternative Transients Program)仿真程序对 CT的饱和问题进行了研究 ,分析比较在不同条件下CT饱和的行为特征及其对单元件横差保护的影响 .研究表明 ,在各种防止 CT饱和的方法中 ,增大CT变比是最直接有效的 .在此基础上 ,给出了巨型发电机组单元件横差保护用电流互感器变比的选择方案以及几种提高电流互感器传变特性的方法 .The current transformer (CT) saturation will affect the unit transverse differential protection performance greatly. The influences of current transformer saturation on the operation of unit transformer differential protection relay under different conditions were analyzed with ATP(Alternative Transients Program). The simulation results show that choosing a large ratio is the most simplest and effective method for preventing current transformer saturation. Based on that, some principles for choosing appropriate transferring ratio and guides for current transformer selection of the huge generator protection were presented.

关 键 词：电流互感器 饱和 单元件横差保护 仿真分析 发电机 

分 类 号：TM31[电气工程—电机]