广东电网小电流接地系统中性点接地方式优化对策  

Optimization Measures for Neutral Point Grounding Mode of Small Current Grounding System of Guangdong Power Grid

作　　者：李谦 赵东生 肖磊石 欧阳旭东 

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]广东电网有限责任公司,广东广州510080

出　　处：《广东电力》2017年第12期124-129,共6页Guangdong Electric Power

摘　　要：针对10~35 kV小电流接地系统容量和电容电流日益增大,传统的中性点接地方式越来越不能满足电网运行和人员安全要求的形势,对广东电网小电流接地系统的运行情况和存在问题进行调查分析,梳理各种中性点接地方式的优缺点和适用场合,论证了消弧线圈并联小电阻接地方式在兼顾供电可靠性和设备、人员安全方面的技术优势,提出广东电网小电流接地系统中性点接地方式的优化选型和改造对策。Traditional neutral point grounding modes can not satisfy requirements for power grid operation and personnel safety due to the increase of capacity and capacitor current of 10？35 kV small current grounding system, therefore,the pa- pr investigates and analyzes operation situation and existing problems of the small current grounding system of Guangdong power grid. By generalizing merits and demerits of various neutral point grounding modes and applicable occasions, it demonstrates technical advantages of arc suppression coil and small resistance in parallel grounding mode in combining power supply reliability, equipment and personnel safety. A then presents countermeasures for optimized type selection and trans-formation for neutral point grounding mode of the small current grounding system of Guangdong power grid.

关 键 词：小电流接地系统 中性点接地方式 经小电阻接地方式 消弧线圈并联小电阻接地方式 电容电流 

分 类 号：TM862.3[电气工程—高电压与绝缘技术]