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
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.
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.
[1] Nikkhajoei H, Lasseter R H.Microgrid protection[C]// IEEE Power Engineering Society General Meeting, Tampa, Florida, USA, 2007: 1-6. [2] Huang Yiping, Ma Xiaoxuan.Research on microgrid technology[J]. Transactions of China Electrotechnical Society, 2015, 30(S1): 320-328. [3] 郭伟, 赵洪山. 基于事件触发机制的直流微电网多混合储能系统分层协调控制方法[J]. 电工技术学报, 2020, 35(5):1140-1151. Guo Wei, Zhao Hongshan.Coordinated control method of multiple hybrid energy storage system in DC microgrid based on event-triggered mechanism[J]. Transactions of China Electrotechnical Society, 2020, 35(5): 1140-1151. [4] 许伟, 肖湘宁. 基于模式转换的独立微电网实时运行控制[J]. 电工技术学报, 2019, 34(增刊1): 282-291. Xu Wei, Xiao Xiangning.Real-time operational control of stand-alone microgrid based on mode switch[J]. Transactions of China Electrotechnical Society, 2019, 34(S1): 282-291. [5] 徐玉韬, 吴恒, 谈竹奎, 等. 适用于微电网的变频式继电保护方案[J]. 电工技术学报, 2019, 34(1): 360-367. Xu Yutao, Wu Heng, Tan Zhukui, et al.Research on variable-frequency based relay protection for micro-grid[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 360-367. [6] Hooshyar A, Iravani R.Microgrid protection[J]. Proceedings of the IEEE, 2017, 105(7): 1332-1353. [7] Laaksonen H J.Protection principles for future microgrids[J]. IEEE Transactions on Power Electronics, 2010, 25(12): 2910-2918. [8] 刘津铭, 陈燕东, 伍文华, 等. 孤岛微电网序阻抗建模与高频振荡抑制[J]. 电工技术学报, 2020, 35(7): 1538-1552. Liu Jinming, Chen Yandong, Wu Wenhua, et al.Sequence impedance modeling and high-frequency oscillation suppression method for island microgrid[J]. Transactions of China Electrotechnical Society, 2020, 35(7): 1538-1552. [9] 李永丽, 金强, 李博通, 等. 低电压加速反时限过电流保护在微电网中的应用[J]. 天津大学学报, 2011, 44(11): 955-960. Li Yongli, Jin Qiang, Li Botong, et al.Application of inverse-time overcurrent protection based on low voltage acceleration in micro-grid[J]. Journal of Tianjin University, 2011, 44(11): 955-960. [10] 许偲轩, 陆于平, 王业. 基于边电压的反时限微网保护方案[J]. 电力系统自动化, 2014, 38(1): 68-73. Xu Sixuan, Lu Yuping, Wang Ye.A section voltage based inverse timing protection method for microgrid[J]. Automation of Electric Power Systems, 2014, 38(1): 68-73. [11] 黄文焘, 邰能灵, 杨霞. 微网反时限低阻抗保护方案[J]. 中国电机工程学报, 2014, 34(1): 105-114. Huang Wentao, Tai Nengling, Yang Xia.Inverse-time low-impedance protection scheme for microgrids[J]. Proceedings of the CSEE, 2014, 34(1): 105-114. [12] Ustun T S, Ozansoy C, Zayegh A.A microgrid protection system with central protection unit and extensive communication[C]//International Conference on Environment and Electrical Engineering, Rome, 2011: 1-4. [13] Islam M R, Gabbar H A.Analysis of microgrid protection strategies[C]//IEEE International Conference on Smart Grid Engineering, Oshawa, 2013: 1-6. [14] 童荣斌, 牟龙华, 庄伟. 微电网的有限区域集成保护[J]. 电力系统自动化, 2014, 38(11): 90-96, 122. Tong Rongbin, Mu Longhua, Zhuang Wei.Limited area integrated protection of microgrid[J]. Automation of Electric Power Systems, 2014, 38(11): 90-96, 122. [15] 邓虹, 杨秀, 刘舒, 等. 微网多级多重保护协调配置与实现[J]. 电网技术, 2014, 38(11): 3088-3094. Deng Hong, Yang Xiu, Liu Shu, et al.Coordinated configuration and implementation of multilevel and multiple protections for microgrid[J]. Power System Technology, 2014, 38(11): 3088-3094. [16] 肖繁, 夏勇军, 张侃君, 等. 含新能源接入的配电网网络化保护原理研究[J]. 电工技术学报, 2019, 34(增刊2): 709-719. Xiao Fan, Xia Yongjun, Zhang Kanjun, et al.Research on a principle of network protection in distribution network with renewable energy sources[J]. Transactions of China Electrotechnical Society, 2019, 34(S2): 709-719. [17] Liu Xindong, Shahidehpour M, Li Zuyi, et al.Protection scheme for loop-based microgrids[J]. IEEE Transactions on Smart Grid, 2017, 8(3): 1340-1349. [18] 黄文焘, 邰能灵, 范春菊, 等. 微电网结构特性分析与设计[J]. 电力系统保护与控制, 2012, 40(18): 149-155. Huang Wentao, Tai Nengling, Fan Chunju, et al.Study on structure characteristics and designing of microgrid[J]. Power System Protection and Control, 2012, 40(18): 149-155. [19] Liu Shuping, Li Panhong, Gao Shibin, et al.Inverse time overcurrent protection for traction transformer[C]// Developments in Power Systems Protection, Birmingham, IET, 2012: 1-4. [20] 马磊, 王增平, 徐岩. 微机继电保护中滤除衰减直流分量的算法研究[J]. 继电器, 2005, 33(17): 11-13. Ma Lei, Wang Zengping, Xu Yan.Study of filtering decaying DC component algorithm for microprocessor-based protection[J]. Relay, 2005, 33(17): 11-13. [21] 张小鸣, 费雨胜. 一种滤除衰减直流分量的电流估计新算法[J]. 电力系统保护与控制, 2010, 38(20): 90-95. Zhang Xiaoming, Fei Yusheng.A new current estimation algorithm to filter decaying DC component[J]. Power System Protection and Control, 2010, 38(20): 90-95. [22] 麦瑞坤, 何文, 何正友, 等. 滤除衰减直流分量的动态同步相量测量算法[J]. 中国电机工程学报, 2010, 30(31): 123-129. Mai Ruikun, He Wen, He Zhengyou, et al.Dynamic phasor estimator with removing decaying DC component[J]. Proceedings of the CSEE, 2010, 30(31): 123-129.
2021, Vol. 36 
