微机发变组保护中反时限保护整定计算  

Setting of Microprocessor-Based Inverse Time Protection for Generator and Transformer

作　　者：张惠芳 思晓兰 

机构地区：[1]青海电力调度通信局,青海西宁810008

出　　处：《电力自动化设备》2001年第11期64-65,共2页Electric Power Automation Equipment

摘　　要：结合实际工作 ,改进了原发变组反时限保护的整定计算原则 ,将原来以发电机额定电流为基准的发变组反时限保护动作特性 ,变成以任意值为基准的发变组反时限保护动作特性 ,但并没有改变发变组反时限保护动作特性曲线。该整定计算原则已应用于桥头电厂六期微机发变组保护中 ,实际应用表明 ,经改进后新的整定计算原则有助于电网整定计算 ,具有较高的推广应用价值。According to actual work,the old setting calculation principle of inverse time protection for generator and transformer is improved,which takes freewill value,instead of the rated current of generator,as the basis of operating characteristic for inverse time protection of generator and transformer.The operating characteristic curve of inverse time protection for generator and transformer does not change.It is applied in the microprocessor based protection for generator and transformer at Qiaotou thermal power plant.The practice shows that,the improved setting calculation principle is helpful to the actual work of network setting calculation and worth promoting its application.

关 键 词：反时限保护 整定计算 发电机 变压器组 微机保护 电力系统 继电保护 

分 类 号：TM772[电气工程—电力系统及自动化]