智能接地配电系统应用关键技术  

Key Technologies for Smart Grounding Distribution Systems Application

作　　者：刘健[1] 芮骏 张志华[1] 吴飞成 张小庆[1] 余银刚 LlUJian RU ZHANG Zhihua WU Feicheng ZHANG Xiaoqing YU Yingang(Shaanxi Electric Power Research Institute, Xi’an 710100,China Anhui Onesky Electric Technology CompanyLimited, Hefei 230088, China)

机构地区：[1]陕西电力科学研究院,陕西西安710100 [2]安徽一天电气技术股份有限公司,安徽合肥230088

出　　处：《供用电》2017年第5期27-31,共5页Distribution & Utilization

基　　金：国家电网公司科技项目"提高配电网故障处理能力关键技术研究"资助~~

摘　　要：为了更好地应用智能接地配电系统处理中性点非有效接地系统单相接地故障,对智能接地配电系统应用中的一些关键技术问题进行了研究。论述了一种接地故障相的软导通和软关断控制有效抑制操作过程可能发生的强烈暂态过程、并避免因选相错误导致两相短路接地的方法。对智能接地装置设计了开关柜结构、户外箱变结构和柱上箱变结构3种结构形式和4种接入方式。探讨了智能接地装置的接入断路器的继电保护问题。讨论了智能接地配电系统的安全性问题。In order to improve the application of smart grounding distribution systems to process the single-phase ground faults, some important technical issues are investigated. A novel approach to reduce the strong transient process and avoid the risk of causing phase- to-phase short-circuit due to grounding phase identification mistakes by soft switching is put forward. Three structures （switch cabinet type, out-doors box type and pole-mounted box type） and four access modes are designed. Relay protection of the access circuit breaker of the smart grounding unit is discussed, as well as the safety of the smart grounding distribution systems.

关 键 词：配电网 中性点非有效接地系统 单相接地 间歇性弧光接地 熄弧 单相接地定位 

分 类 号：TM72[电气工程—电力系统及自动化]