文章摘要
刘健,王玉庆,芮骏,等.智能接地配电系统关键参数设计[J].电力系统自动化,2018,42(16):180-186. DOI: 10.7500/AEPS20171031004.
LIU Jian,WANG Yuqing,RUI Jun, et al.Key Parameter Design of Smart Grounding Distribution Systems[J].Automation of Electric Power Systems,2018,42(16):180-186. DOI: 10.7500/AEPS20171031004.
智能接地配电系统关键参数设计
Key Parameter Design of Smart Grounding Distribution Systems
DOI:10.7500/AEPS20171031004
关键词: 配电网  中性点非有效接地系统  熄弧  单相接地  单相接地选线  单相接地定位  单相接地隔离
KeyWords: distribution networks  neutral non-effectively grounded systems  arc extinction  single phase grounding  single phase grounding feeder identification  single phase grounding location  single phase grounding isolation
上网日期:2018-07-13
基金项目:国家自然科学基金委员会-国家电网公司智能电网联合基金资助项目“城市智能配电网保护与自愈控制关键技术”
作者单位E-mail
刘健 陕西电力科学研究院, 陕西省西安市 710054 powersys@263.net 
王玉庆 西安理工大学自动化与信息工程学院, 陕西省西安市 710048  
芮骏 安徽一天电气技术股份有限公司, 安徽省合肥市 230088  
张志华 陕西电力科学研究院, 陕西省西安市 710054
西安理工大学自动化与信息工程学院, 陕西省西安市 710048 
 
吴飞成 安徽一天电气技术股份有限公司, 安徽省合肥市 230088  
余银钢 安徽一天电气技术股份有限公司, 安徽省合肥市 230088  
摘要:
      为了更好地应用智能接地配电系统解决中性点非有效接地配电系统单相接地故障处理,在对其基本原理简要论述的基础上,深入分析了接地开关合闸和分闸瞬间暂态过程及其抑制措施、单相接地选相错误的容错和纠错措施,在此基础上得出了接地中间电阻的设计参数。对智能接地配电系统中,中性点不接地系统和中性点经消弧线圈接地系统在永久性单相接地时的选线和定位方法进行了研究,并探讨了参数设计问题。针对断线不接地等超高阻接地选线问题,提出一种根据脉冲接地变压器投入之后和之前零序电流比值进行选线的方法。仿真分析和实验结果与理论分析一致,表明了所述方法的可行性和有效性。
Abstract:
      To make full use of smart grounding system to solve single-phase grounding fault in the neutral non-effectively grounding distribution systems, based on the simple description of basic principles, the transient process during the closing and opening period of the grounding switch and inhibition measures are analyzed in detail, the techniques of transient process reduction and grounded phase identification error correction are described with the corresponding analysis, the design parameters of intermediate resistance of grounding are obtained. The method of identification and location of the single-phase grounding position in permanent single-phase grounding fault for systems with neutral ungrounded and with neutral grounded through an arc-suppression coil are investigated, respectively, together with their design considerations. A method of identifying the disconnected feeder is put forward based on the ratio of zero sequence current before and after accessing the pulse grounding transformer. The simulation and experimental results are in consistent with the theoretical analysis, which shows the feasibility and effectiveness of the proposed method.
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