农村低压电网接线及保护方式探讨

Discussion of rural low voltage power grid connection and protection ways

为保证居民人身、财产安全,保障电网安全可靠运行,根据电力相关法律和规定,在TT接线方式配电变压器低压侧出线处必须加装总剩余电流保护器,对每一用户也要加装末级剩余电流保护器。根据《农村低压电力技术规程》规定:农村低压电网宜采用TT系统,城镇电力用户宜采用TN-C系统。针对农村低压电网普遍采用TT系统以及TT系统必须安装漏电保护器这2个问题开展实例研究,探索农村低压电网接线及保护最佳方式。

In order to guarantee the residents＇ personal and property security, guarantee the safety and reliable operation of power grid, according to the relevant laws and regulations, in TT connection mode, the outlet on the low pressure side of transformer must add the total residual current protector. EaCH user must add the final residual current protector. At the same time, “The rural low-voltage electric power technical code” regulates： rural low-volt- age power grid should adopt TT system, urban users should adopt the TN-C system. This report aims at the rural low-voltage power grid. Adopting TT system and TT system must install leakage pro- tection. These two problems canT out a case study to explore the best connection and protection mode in rural low-voltage power grid