发电厂继电保护整定计算北京中恒博瑞数字电力有限公司二零一零年五月目录继电保护基本概念....................................................................................4一、电力系统故障..................................................................................................................4二、继电保护概念..................................................................................................................4三、对继电保护提出的四个基本要求(四性)及其相互关系...........................................4标幺值计算................................................................................................7一、定义..................................................................................................................................7二、基准值选取......................................................................................................................7三、标幺值计算......................................................................................................................7元件各序等值计算....................................................................................9一、设备类型:......................................................................................................................9二、等值原因..........................................................................................................................9三、主要元件等值..................................................................................................................91.输电线路及电缆.........................................................................................................92.变压器.......................................................................................................................113.发电机......................................................................................................................144.系统..........................................................................................................................145.电容器......................................................................................................................156.电抗器......................................................................................................................15不对称故障计算......................................................................................16一、原理(求解方法).........................................................................................................16二、各种不对称故障故障点电气量计算.............................................................................17三、保护安装处电气量计算.................................................................................................19四、举例................................................................................................................................22阶段式电流保护......................................................................................25一、I段(电流速断保护)..................................................................................................25二、II端(延时速断).........................................................................................................25三、III端(延时过流)...............................................