适用于数据中心的多台并列直配柴油发电机的中性点接地及保护配置方案  

Neutral grounding method and protection co-ordination on several direct-connected diesel generators for data center

作　　者：赵亮亮 高凤荣 ZHAO Liangliang;GAO Fenrong(China Aviation Planning and Design Institute(Group)Co.,Ltd.,Beijing 100120,China)

机构地区：[1]中国航空规划设计研究总院有限公司,北京100120

出　　处：《电气应用》2020年第8期60-65,共6页Electrotechnical Application

摘　　要：方案的阐述基于一个由多台并列柴油发电机、高压电缆、降压变压器和高压电动机构成的微电网系统。该微电网系统适用于数据中心、机场、采矿区或采油平台等场合。发电机接地电容电流若超过限值很容易损害发电机定子绝缘。为此,介绍了一种柴油发电机中性点接地方案及微电网保护的配置方案,分析了该中性点接地形式、保护配置和主要保护的整定计算。此方案已在项目中实施运行并取得了良好的运行结果。Description of the scheme is based on a power micro grid composed of several diesel generators, cables, step-down transformers and motors. The micro grid system is suitable for data center, airport, mining area or oil production platform. If the grounding capacitance current of generator exceeds the limit value, it is easy to damage the insulation of generator stator. Therefore a kind of neutral grounding scheme of diesel generator and confguration scheme of micro grid protection is introduced. The neutral grounding form, protection confguration and setting calculation of main protection are analyzed. This scheme has been implemented in the project and achieved good results.

关 键 词：数据中心 微电网 柴油发电机 高阻接地 接地保护 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM314