电工技术学报  2021, Vol. 36 Issue (3): 623-633    DOI: 10.19595/j.cnki.1000-6753.tces.191724
电力系统及综合能源 |
微电网多层级协同反时限保护方案
黄文焘1, 邰能灵1, 刘剑青1, 马洲俊2, 王杰1
1.上海交通大学电力传输与功率变换控制教育部重点实验室 上海 200240;
2.国网江苏省电力有限公司南京供电分公司 南京 210019
Multi-Layer Collaborative Inverse-Time Protection Schemes for Microgrids
Huang Wentao1, Tai Nengling1, Liu Jianqing1, Ma Zhoujun2, Wang Jie1
1. Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai 200240 China;
2. Nanjing Power Supply Company of State Grid Jiangsu Electric Power Co. Ltd Nanjing 210019 China
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摘要 微电网由大量分布式电源组成,且具有灵活、复杂的运行方式,传统配电网保护难以满足其对可靠性与稳定性的要求。基于微电网的拓扑结构和故障特性,该文设计并提出微电网多层级协同反时限保护方案。该方案将微电网保护区域按故障影响扩散分为中心层、区域层和系统层,提出基于正序电流相量的反时限差动电流保护,通过差动电流确定故障线路分段,并利用差动电流的反时限特性计算保护动作时间,按故障严重程度确定动作时间,以此为基础,研究微电网多层级协同保护算法。为降低非周期分量对保护相量的影响,提出反时限差动电流保护的相量计算改进算法。该文所提保护方案实现了多层级协同配合切除故障,提高了微电网保护的故障区域判别与快速动作能力,且在并网和孤岛两种运行方式具有自适应配置能力。利用PSCAD/EMTDC进行仿真分析,验证了保护方案的有效性和可靠性。
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黄文焘
邰能灵
刘剑青
马洲俊
王杰
关键词 多层级协同保护反时限差动电流保护并网保护相量改进算法微电网    
Abstract:Due to the integration of large-scale distributed generation and the flexible operation modes, microgrids require for a much higher demand on the reliability and stability. Thus, the traditional distribution network protection is difficult to meet the requirements of microgrid operation. According to the topology and fault characteristics of microgrids, this paper proposes a multi-layer collaborative inverse-time protection scheme. The protection scheme is divided into the core layer, the regional layer and the system layer. It puts forward an inverse-time differential current (ITDC) protection based on the positive sequence current phasor. Then the principle, criterion and matching method of the ITDC protection are studied. Based on the ITDC protection, the scheme designs a multi-layer cooperative protection algorithm. Besides, in order to reduce the influence of the non-periodic components on the calculation of phasor, an improved algorithm for phasor calculation is proposed. The protection scheme achieves the coordination of the core layer primary protection, regional layer backup protection and system layer interconnection protection. It has an adaptive capability for the grid-connected mode and islanding mode. The simulation model is established in PSCAD/EMTDC, and the effectiveness and reliability of the protection scheme is verified by results.
Key wordsMulti-layer collaborative protection    inverse-time differential current protection    interconnection protection    improved phasor calculation algorithm    microgrids   
收稿日期: 2019-12-12     
PACS: TM773  
基金资助:国家自然科学基金青年基金项目(51807117)、上海市教委科研创新重大项目(2019-01-07-00-02-E00044)和国家重点研发计划(2019YFE0102900)资助
通讯作者: 邰能灵 1972年生,男,教授,博士生导师,研究方向为电力系统继电保护和电力系统综合自动化等。E-mail:nltai@sjtu.edu.cn   
作者简介: 黄文焘 1988年生,男,副教授,博士生导师,研究方向为配电网、微电网和分布式新能源控制与保护等。E-mail:hwt8989@sjtu.edu.cn
引用本文:   
黄文焘, 邰能灵, 刘剑青, 马洲俊, 王杰. 微电网多层级协同反时限保护方案[J]. 电工技术学报, 2021, 36(3): 623-633. Huang Wentao, Tai Nengling, Liu Jianqing, Ma Zhoujun, Wang Jie. Multi-Layer Collaborative Inverse-Time Protection Schemes for Microgrids. Transactions of China Electrotechnical Society, 2021, 36(3): 623-633.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.191724          https://dgjsxb.ces-transaction.com/CN/Y2021/V36/I3/623