考虑馈线负荷分布的10kV配电线路合环电流计算

Calculation on Loop Current of 10 kV Distribution Line Considering Feeder Load Distribution

由于10 kV馈线负荷数据多且分散,研究中往往将馈线负荷集中分布在一点进行考虑。通过建立递增、递减、均匀分布3个典型负荷模型,推导出3种模型对合环开关两侧电压的影响,然后通过叠加原理计算出合环电流,并与负荷集中分布在一点的计算结果进行比较。通过对广东某地区4个合环算例进行计算分析,说明在合环电流计算过程中,考虑馈线负荷分布对合环开关两侧电压的影响是十分必要的,可以提高合环电流计算的准确性。

For reason of mass and dispersive data of 1 0 kV feeder load,it often centralizes feeder load on one point for stud-y.By establishing three typical load models including progressive increase load model,progressive decrease load model and u-niformly distributed load model,impact on loop switchgear side voltage by these three models was deduced.Based on super-position principle,loop current was calculated and the calculating result was compared with that of load centralization.By calculation analysis on four loop examples in some area in Guangdong province,it showed that in loop current calculation progress,it was very necessary to consider impact of feeder load distribution on loop switchgear side voltage which was able to improve veracity of calculation on loop current.