110 kV并列双回线的优化设计及其整定分析

Optimal Design and Setting Analysis of 110 kV Parallel Doublecircuit Lines

随着人们用电量的不断提高,为了提高供电的稳定性,人们也开始使用110 kV并列双回线进行电路设计,但是关于线路安装,如果没有对应的保护系统,在允许双回线路中出现一回线路故障,这时的两条线路就会出现不配的延迟时间段保护。这种情况会牺牲部分线路,在电网出现故障情况,启动保护装置,由于误动或是拒动情况有出线情况,这时大面积的线路会出现延长事故处理的时间。因此,总结实际情况,对110 kV并列双回线进行全面的整理,既要实现快速的保护,又要提高线路的选择性。

With the increasing use of electricity, in order to improve the stability of power supply, people began to use110 kV parallel double-circuit lines design. As to line installation, if there is no corresponding protection system and a fault is in one of the double-circuit lines, there will be unmatched delay-time protection in two lines, which destroys parts of the lines. In case of power grid failure, with protection device started, due to misoperation or refusal, outgoing line will cause large area of the line prolong the time of accident treatment. Therefore, with the actual situation,comprehensive arrangement of 110 kV parallel double-circuit not only realizes rapid protection, but also improves the selectivity of the lines.