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柔性直流配电网保护方案及设备研制
作者:
作者单位:

1. 南瑞集团有限公司(国网电力科学研究院有限公司), 江苏省南京市 211106; 2. 智能电网保护和运行控制国家重点实验室, 江苏省南京市 211106; 3. 河海大学能源与电气学院, 江苏省南京市 210098; 4. 国网江苏省电力有限公司, 江苏省南京市 210000

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基金项目:

国家重点研发计划资助项目(2018YFB0904700);国家电网公司科技项目“交直流混联电网故障耦合特性及继电保护新原理研究”


Protection Scheme and Device Development of Flexible DC Distribution Network
Author:
Affiliation:

1. NARI Group Corporation(State Grid Electric Power Research Institute), Nanjing 211106, China; 2. State Key Laboratory of Smart Grid Protection and Control, Nanjing 211106, China;3. College of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China; 4. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China

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    摘要:

    针对典型柔性直流配电网开展了保护分区及保护配置策略研究;根据直流线路的故障特性,分析了直流极间短路故障、单极接地故障以及断线故障的保护方案。对于直流电网快速故障定位和隔离的要求,提出一种基于差动保护和多点方向信息的综合故障定位方法。基于所提出的保护和故障定位方案,研制了高采样率且具备多类型模拟量接口的直流配电网保护设备。经实时数字仿真(RTDS)系统仿真和动模试验,验证了保护方案的可行性和故障定位方法的正确性,所研制的保护设备动作行为、性能指标满足直流配电网安全运行需求。

    Abstract:

    The protection partition and protection configuration are studied based on the typical flexible DC distribution network. According to the fault characteristics of DC lines, the protection scheme of DC pole-to-pole short-circuit fault, single-pole grounding fault and broken line fault are analyzed, and a comprehensive fault location method based on differential protection and multi-point direction information is proposed. Based on the proposed protection and fault location scheme, the protection device of DC distribution network which has high sample rate and multiple kinds of analog input interfaces is developed. The test and dynamic simulation on real-time digital simulation(RTDS)system prove the feasibility of the protection scheme and correctness of the fault location method, and the action behavior and performance index of the developed protection device meet all the safety operation requirements of DC distribution network.

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吴通华,戴魏,李新东,等.柔性直流配电网保护方案及设备研制[J].电力系统自动化,2019,43(23):123-130. DOI:10.7500/AEPS20190428004.
WU Tonghua, DAI Wei, LI Xindong,et al.Protection Scheme and Device Development of Flexible DC Distribution Network[J].Automation of Electric Power Systems,2019,43(23):123-130. DOI:10.7500/AEPS20190428004.

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  • 收稿日期:2019-04-28
  • 最后修改日期:2019-10-31
  • 录用日期:2019-10-22
  • 在线发布日期: 2019-10-31
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