提升小电流接地系统单相接地故障处理能力要点分析  

Analysis of the Key Points of Improving Single-Phase Grounding Fault Handling Ability of Small Current Grounding System

作　　者：秦凯 QIN Kai(Ningxia Baoli Group Kunpeng Clean Energy Co.,Ltd.,Yinchuan 750004,China)

机构地区：[1]宁夏宝立集团鲲鹏清洁能源有限公司,宁夏银川750004

出　　处：《通信电源技术》2022年第12期74-76,共3页Telecom Power Technology

摘　　要：在10 kV、35 kV电力系统中,单项接地故障较为常见,并且多发于雷雨、潮湿天气。当发生单相接地后,故障相对地电压降低,非故障两相电压升高,但线电压依然保持不变,用户不易察觉此类故障。当长期处于该状态时,会对绝缘薄弱环节造成损害、甚至击穿,从而造成相间短路,使事故损害不断扩大,给企业造成更大的危害。针对导致故障出现的主要原因进行分析,研究小电流接地系统单相接地故障处理能力提升要点,以此提高电力系统的稳定性、安全性。In 10 kV and 35 kV power systems,single-phase grounding faults are more common,and most occur in thunderstorms and wet weather.When a single-phase grounding occurs,the fault-phase-to-ground voltage decreases,and the non-fault two-phase voltage increases,but the line voltage remains unchanged,and users are not easily aware of such faults.When it is in this state for a long time,it will cause damage to the weak link of the insulation,or even breakdown,resulting in a short circuit between phases,and the accident damage will continue to expand,causing greater harm to the enterprise.The main reasons for the failure are analyzed,and the main points of improving the single-phase grounding fault handling capability of the small current grounding system are studied,so as to improve the stability and safety of the power system.

关 键 词：小电流接地系统 单相接地 故障处理 

分 类 号：TM862[电气工程—高电压与绝缘技术]