有源配电网电流差动保护应用技术探讨

高厚磊; 李娟; 朱国防; 徐丙垠; 赵宝光; 李尚振

引用本文:	高厚磊,李娟,朱国防,等.有源配电网电流差动保护应用技术探讨[J].电力系统保护与控制,2014,42(5):40-44.
	GAO Hou-lei,LI Juan,ZHU Guo-fang,et al.Study on application technology of current differential protection in active distribution network[J].Power System Protection and Control,2014,42(5):40-44

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有源配电网电流差动保护应用技术探讨
高厚磊¹, 李娟¹, 朱国防¹, 徐丙垠², 赵宝光³, 李尚振³
1.电网智能化调度与控制教育部重点实验室（山东大学），山东济南 250061;2.山东理工大学智能电网研究中心，山东淄博 255049;3.国网山东省电力公司莱芜供电公司，山东莱芜 271100

摘要:

有源配电网具有多电源、多分段、多分支、功率双向流动、弱馈等特征，传统三段式电流保护难以保证选择性和灵敏性，需要提供新的更有效的保护方法。基于该背景，将正序故障分量电流差动保护引入到有源配电网，探讨其应用原理与实现技术。针对不同的馈线结构，给出了适应性差动保护动作判据及门槛整定原则。针对配电网线路特点，提出并实现了基于故障信息的电流数据自同步方法。根据配电自动化通信体系最新进展，探讨了基于点对点对等通信实现差动保护数据交换的通信规约。基于智能配电终端平台，开发出正序故障分量电流差动保护样机并对其进行了综合测

关键词: 有源配电网分布式电源电流差动保护正序故障分量自同步对等通信

DOI：10.7667/j.issn.1674-3415.2014.05.007

分类号:

基金项目:国家高技术研究发展计划（863计划）重点项目（2012AA050213）；国家自然基金面上项目（51177094）；国网山东省电力公司重点科技项目（2013A-25）

Study on application technology of current differential protection in active distribution network

GAO Hou-lei¹, LI Juan¹, ZHU Guo-fang¹, XU Bing-yin², ZHAO Bao-guang³, LI Shang-zhen³

1.Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education (Shandong University), Jinan 250061, China;2.Research Center for Smart Grid, Shandong University of Technology, Zibo 255049, China;3.Laiwu Power Supply Company, Shandong Electrical Power Corporation, Laiwu 271100, China

Abstract:

For active distribution network, its characteristics can be described as multi-source, multi-segment, multi-branch, bidirectional power flow, bidirectional fault current, weak-infeed and so on. In this case, the selectivity and sensitivity of traditional over current protection scheme cannot be ensured. It is necessary to provide more effective protection methods. This paper introduces a current differential protection scheme based on positive sequence fault component (PSFC) into active distribution network, and discusses its application principle and implementation technology. For different structure of feeders, the corresponding criterions and threshold setting rules are provided. In view of the current condition of distribution network, a self-synchronization scheme using fault signal is proposed and realized. And the communication protocols used for data exchange of differential protection based on peer to peer communication is discussed according to the new development of distribution automation communication architecture. Finally, the proposed protection prototype is developed based on a platform of intelligent distribution terminal, and the test results have verified the feasibility of the protection scheme.

Key words: active distributed network distributed generation current differential protection positive sequence fault component self-synchronization peer to peer communication

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