广西电网重载线路距离Ⅲ段保护自动校核系统研发

Development of the Automatic Verification System of the Distance Protection Ⅲ of Heavy load Lines in Guangxi Power Grid

为改变重载线路距离Ⅲ段定值手动校核效率低下且易出错的现状,研发了广西电网220 kV重载线路距离Ⅲ段保护自动校核系统。该系统包括重载线路信息梳理、自动导入接口软件、继电保护整定计算系统、距离Ⅲ段定值自动校核计算模块和校核结论等部分,其中重载线路信息自动导入接口与校核原理脚本代码开发是系统研发的关键。应用效果表明,该系统提高了距离Ⅲ段定值校核的工作效率,确保了重载时线路距离保护不误动,避免了极端方式下电网运行状况的恶化,有助于电网的快速恢复及安全稳定运行。

In order to change the low efficiency and error-prone situations in the distance protectionⅢof heavy load lines where the setting values are manualy verified,the automatic verification system of the distance protectionⅢof the 220kV heavy load lines in Guangxi Power Grid is developed.The system has several parts including the information organization of the heavy lines,the interface software of automatic import,the relay protection setting calculation system,the automatic verification calculation module of the setting values of the distance protectionⅢand the verification conclusion,among which the automatic import interface of the heavy load lines’information and the script codes development of the verification principle are the keys of the system development.The application effects show that the system improves the working efficiency of the relay setting verification of the distance protectionⅢ,guarantees the absence of misoperation of distance protections of heavy load lines,avoids the deterioration of power grid operation status under extreme operation modes,and is helpful to the rapid restoration and secure and stable operation of power grid.