配电系统的中性点接地方法通常包括不接地的中性点，通过电阻接地的中性点和通过消弧线圈接地的中性点。各种接地方法不同，使用方法也不同。许多城市交换机网改变了过去以架空线为主，而电缆为所有人的局面。同时，一些新设备，例如重组型SF6开关设备，盖土网 防寒布 麻绳 油麻绳 麻刀 沥青麻绳 静压造型线 自动浇注机 铸铁拍门 钢制拍门 玻璃钢拍门交联聚乙烯电缆和氧化锌避雷器也得到了如此，如何有效，经济地设置中性点接地已成为当前电源工作的重点。
The neutral point grounding method of distribution system usually includes ungrounded neutral point, resistance grounded neutral point and arc suppression coil grounded neutral point. Different grounding methods lead to different usage. Many urban switch networks have changed the situation in which the overhead line is the main part and the cable is the owner. At the same time, some new equipment, such as reconfigurable SF6 switchgear, cross-linked polyethylene cable and zinc oxide arrester, have also been obtained. How to effectively and economically set the neutral grounding has become the focus of the current power supply work.
目前，至少有些交换网中性点都采用电阻接地操作。安装中性点接地电阻柜后，当发生非金属接地时，流经接地点和中性点的电流明显超过非金属接地时的金属接地电流。同时，声相电压也上升。零序电压值显着降低，大约单相金属接地的一半。可以切削，通过电阻使用中性点接地可以减少单相接地时的瞬态过电压，消除电弧接地过电压和某些重叠过电压，并可以通过使用简单的继电保护装置快速选择故障线路
At present, at least some neutral points of switching network are grounded by resistance. After installing the neutral grounding resistance cabinet, when the non-metal grounding occurs, the current flowing through the grounding point and neutral point obviously exceeds the metal grounding current when the non-metal grounding occurs. At the same time, the acoustic phase voltage also increases. The value of zero sequence voltage decreases significantly, which is about half of that of single-phase metal grounding. It can cut and use neutral point grounding through resistance to reduce transient overvoltage during single-phase grounding, eliminate arc grounding overvoltage and some overlapping overvoltage, and quickly select fault line by using simple relay protection device