丁建兴　李晓艳（海军工程设计研究局，北京市　100070）

Analysis on the Grounding Type of Ashore Low-voltage Power Distribution System

Li Yan（The 4th Research General Staff，Beijing 100850，China）

Ding Jianxing　Li Xiaoyan（The Navy Institute of Engineering Design & Research，Beijing 100070，China）

 

作者信息

李　研，男，总参工程兵第四设计研究院，高级工程师；《建筑电气》杂志编委会委员。

丁建兴，男，海军工程设计研究局，高级工程师。

李晓艳，女，海军工程设计研究局，工程师。

 

    Abstract After ships dock at the shore，ashore power systems are needed for power supply of these ships. The grounding of low-voltage power distribution systems on ships mostly adopts ungrounded power neutral-point IT systems，while the grounding of low-voltage distribution systems on the land adopts TN or TT systems with power neutral points directly grounded. As for the same low-voltage distribution system，when the grounding methods for neutral points of power distribution systems on ships and on the land are different，that means the system grounding type has changed. Through comparison and analysis of the grounding types of low-voltage distribution systems on ships that are connected to ashore power sources，the authors believe that ashore power distribution systems which adopt the grounding methods by using TN and IT systems can meet the safety and reliability requirements for ships.

    Key words　Low-voltage distribution system of ship　Ashore low-voltage power distribution system　Grounding type　Insulation monitoring

    摘　要　舰船停靠码头后需要由岸上的电力系统为其供电。舰船上低压配电系统接地型式大多采用电源中性点不接地的 IT 系统，而陆地上民用低压配电系统的接地型式采用电源中性点直接接地的 TN 或 T T 系统。对于同一个低压配电系统，当船电和岸电电源中性点接地方式不同时，系统接地型式发生了改变。通过对引接岸电电源的舰船低压配电系统接地型式比较、分析，认为低压配电系统接地型式为 TN 和 IT 系统的岸电电源，均能满足舰船用电的安全性和可靠性要求。

    关键词　舰船低压配电系统　岸电低压配电系统　接地型式　绝缘监测