地铁接地变选型设计要素分析

Metro Grounding Type Design Element Analysis

为了防止系统在严重偏执中性电流的作用下出现跳闸等异常反应,系统要设置大容量的接地变压器用作中性点接地。重点研究了接地变压器的选型,而接地变压器的选型主要包括接地容量的验算、站内用电功率的计算、配合系统对接地变压器的影响、柔性供电方案对接地变压器的影响、接地变压器的并列方案等。

In order to protect the system from tripping in the role of neutral current severe paranoia and other abnormal reactions, the system should set up a large-capacity ground neutral grounding transformer is used. Focuses on the selection of grounding transformer, and the selection includes grounding grounding transformer capacity checking, parallel programs affect the calculation of electric power station, with the system grounding transformer, the impact of flexible power supply scheme for grounding transformers, grounding transformers and so on.