220 kV线路保护整定计算的简化实践

随着电网单端电源供电220kV终端变电站越益增多,相应的继电保护整定和计算也越显重要。介绍了江苏电网220kV线路继电保护整定计算的主要特点,就实际运行中三种运行方式的优缺点进行了分析和比较,最后叙述了地区电网110kV系统中带小电源的220kV线路继电保护的整定计算方案,运行实践表明,经过简化后的整定计算方案,符合江苏电网实际运行的要求,取得了较好的效果。

Simplification of computation of 220 kV line protection setting

With the increasing number of 220 kV terminal substations supplied by single-ended power source of the power grid, the relevant computation of relay protection setting appears more and more important. The main features of relay protection setting computation for 220 kV lines of Jiangsu Power Grid were introduced and the merits and demerits of the three operating modes in actual operation were analyzed and compared. The computation plan of relay protection setting for 220 kV lines with small power source of the 110 kV system in regional gird was expatiated. The operation practice showed that the simplified setting computation plan conforms to the requirements of actual operation of Jiangsu Power Grid and has achieved good results.