针对轴电流问题的双馈风电机组接地型式分析  

Analysis on the Grounding Type of Dfig Wind Turbines Considering the Bearing Current

作　　者：李延峰 谢冬梅[2] LI Yanfeng;XIE Dongmei(Liaoning Longyuan Renewable Development Co.,Ltd.,Shenyang 110013,China;Shenyang Institute of Engineering,Shenyang 110136,China)

机构地区：[1]辽宁龙源新能源发展有限公司,沈阳110013 [2]沈阳工程学院,沈阳110136

出　　处：《风力发电》2023年第4期28-33,共6页Wind Power

摘　　要：轴电流问题是双馈风电机组的运行难题之一,已有多种技术措施提出并试图解决该问题,这些措施均围绕发电机本体分析和考虑问题。这也是至今尚未出现彻底解决该问题的技术方案的原因之一。本文从电系统层面出发分析轴电流的路径,考虑阻断轴电流的其他可能性,借鉴船舶岸电供电方式、中压传动共模电压抑制方案以及火电机组厂用电接线方式,提出双馈风电机组接地型式建议。Bearing current issue is one of the most troubling for DFIG wind turbine operating and maintenance.The multiple technical measures attempting to solve the problem are all centered on the would-rotor generator,which may yield one reason why there is still no root-cause-based solution.This paper tries to analyse the paths of bearing current from the perspective of galvanic systems to find other possibility of blocking up bearing passage through.With references on onshore power supply for marine vessels,common-mode voltage suppression for MV AC drives and thermal power plant auxiliary power wiring,a grounding type suggestion is presented to tackle the bearing current issue.

关 键 词：共模电压 轴电流 变压器中性点 接地 双馈风电机组 

分 类 号：TM6[电气工程—电力系统及自动化]