发电厂直流系统接地故障分析及改善措施  

Analysis of DC System Grounding Fault and Its Improved Measures in Power Plant

作　　者：孙严 

机构地区：[1]北京京能电力股份有限公司石景山热电厂,北京100041

出　　处：《农业科技与装备》2015年第8期36-38,41,共4页Agricultural Science & Technology and Equipment

摘　　要：由于分布范围较广及工作环境比较恶劣,直流系统容易发生绝缘降低的现象。直流系统的绝缘情况直接影响到直流控制、信号监视回路的稳定性和可靠性,因此在直流系统发生故障时,能够及早发现并迅速处理就显得尤为重要。介绍一起发电厂发生的直流系统接地故障,对直流系统接地时出现的异常现象进行详细的理论分析,并依据分析结论提出改善措施。DC system network is widely distributed in power plant, and because some of the work environment is poor, DC system occurs to the phenomenon of insulation reduction easily. The insulation of DC system directly affects the stability and reliability of DC control and signal monitoring circuit, so it is very important to detect and deal with the one point grounding fault when it happens in DC system. In this paper, it introduced DC system grounding fault in power plant, and analyzed abnormal phenomenon in DC system in detail, and gave improved measures according to the analysis conclusion.

关 键 词：直流系统 接地故障 直流绝缘监察装置 分析 

分 类 号：TM77[电气工程—电力系统及自动化]