南北地区农村低压配电网接地型式差异化选择策略及分析

Strategy and the necessity of the differential selection for distribution network grounding type of low voltage rural north and south areas

农村低压配电网的接地型式是否合理将直接影响农村用电的安全性、可靠性等各项电能指标,选择农村低压配电网的接地型式应结合当地电网运行的实际、低压线路的健康状况,充分考虑区域的自然气候状况以及防雷与接地等各种因素。经分析,雷击少的北方地区的农村低压配电网易采用TT系统,经常遭受雷击、低压线路绝缘健康水平较高的南方地区更适宜采用TN-C-S系统。

Whether the rural LV power distribution network’s grounding type is reasonable or not can make a direct influence on rural electricity’s security and reliability,the selection of it should take a full account of regional natural climate conditions,lighting protection and other factors.After the analysis,northern area has less lighting,it should use TT system,Southern area has more lighting and a high line insulation health level,it should use TN-C-S system.