超高压长线电容电流对差动保护的影响及补偿对策仿真分析  

The emulation analysis for the influence of capacitance current of UHV transmission line on differential current protection and compensating countermeasure

作　　者：李岩[1] 陈德树[1] 张哲[1] 尹项根[1] 

机构地区：[1]华中科技大学电力系,湖北武汉430074

出　　处：《继电器》2001年第6期6-9,共4页Relay

摘　　要：采用ATP软件建立了超高压长线模型 ,分析了超高压长线各种故障情况下 ,分布电容对分相电流差动的影响 ,并对比了采用电容电流补偿和不采用电容电流补偿的相量差动与故障分量差动原理的动作情况。仿真结果表明 ,分相电流差动在原理上完全适用于超高压长输电线路的保护 ,在各种运行工况下 ,采用电容电流补偿可以有效提高差动保护的可靠性和灵敏度 ,在同一工况下 。Basing on the long UHV transmission line model of ATP, this article analysed the influence of capacitance current on current differential protection in various faulted of long UHV transmission line, contrasted the performance diversity between the current phase differential protection and the fault component differential protection with/without capacitance current compensation. The result shows that differential current protection is applicable for UHV transmission line, and capacitance current compensation can improve the security and sensitivity of differential protection , and in any case the fault component differential protections have better distinguishability than current phase differential protection.

关 键 词：超高压长线路 差动保护 电容电流 输电线路 继电保护 仿真 

分 类 号：TM773[电气工程—电力系统及自动化]