计算电网中电压元件保护范围的新方法  

A New Method for Computing Protection Coverage of Voltage Element in Power Network

作　　者：罗长亮[1] 吕飞鹏[1] 廖小君[2] 蒋科[1] 郭亮[1] 

机构地区：[1]四川大学电气信息学院,四川省成都市610065 [2]四川电力职业技术学院,四川省成都市610072

出　　处：《电力系统自动化》2009年第1期66-69,共4页Automation of Electric Power Systems

基　　金：四川省应用基础研究项目(2007JY085)~~

摘　　要：基于线路短路故障通用计算模型,利用正序网节点阻抗矩阵,根据电压元件保护范围末端相间短路时,保护安装处母线电压与电压元件定值相等的特点,提出了通过求解一元二次方程直接计算电压元件保护范围的新方法。该方法适用于各种接线形式的复杂网络,具有通用性强、计算量小、结果精确、易于编程实现等特点。In accordance with that setting value of a voltage element is equal to bus voltage on installation location of protection during phase-to-phase fault on the protection coverage end, based on the node impedance matrix of positive sequence network and general computation model for short circuit fault on the power line, a new method is proposed to directly obtain the protection coverage of voltage element by solving a unary quadratic equation. This method is suitable for all kinds of complex power network structures with such advantages as general-purpose, less computation burden, accurate results and easy to program, etc.

关 键 词：整定计算 保护范围 电流电压保护 

分 类 号：TM773[电气工程—电力系统及自动化]