Abstract：Abrupt load change is a common phenomenon of power system.When it occurs,the bus voltage of DC micro-grid may collapse if the power system cannot fully support such abrupt change.Consequently,the stability of both voltage and frequency of the power system will be influenced.In this paper,a grid-connected DC micro-grid model including photovoltaic battery,energy storage and the large power grid is established in Matlab/Simulink.From the view point of power flow,four operating modes of DC micro-grid are introduced.The phenomena regarding instability is presented when the load is abruptly changed.The relationship between instability of DC micro-grid and power flow,as well as the operating modes,is investigated.The mechanism on stability loss of the DC micro-grid system is studied from both theoretical and numerical ways,and the corresponding stability boundary is also given.The results of this paper will provide a reference to the design of the DC micro-grid.
肖百惠,戴栋,张波,韩永霞. 负载突变情况下直流微网的分岔现象及分析[J]. 电工技术学报, 2016, 31(增刊2): 131-141.
Xiao Baihui ,Dai Dong, Zhang Bo ,Han Yongxia. Bifurcation and Its Analysis of DC Micro-Grid under Abrupt Load Change. Transactions of China Electrotechnical Society, 2016, 31(增刊2): 131-141.
[1] 鲁宗相,王彩霞,闵勇,等.微电网研究综述[J].电力系统自动化,2007,31(19):100-107. Lu Zongxiang,Wang Caixia,Min Yong,et al.Review on the research of micro-grid[J].Automation of Electric Power System,2007,31(19):100-107. [2] 郑漳华,艾芊.微电网的研究现状及在我国的应用前景[J].电网技术,2008,32(16):27-31 Zheng Zhanghua,Ai Qian.Present situation of research on micro-grid and its application prospects in China[J].Power System Technology,2008,32(16):27-31. [3] Ackermann T,Andersson G,SoderL.Distributed generation:a definition[J].Electric Power Systems Research,2001,57(3):195-204. [4] 李建林,马会萌,惠东.储能技术融合分布式可再生能源的现状及发展趋势[J].电工技术学报,2016,31(14):1-10. Li Jianlin,Ma Huimeng,Hui Dong.Present development condition and trends of energy storage technology in the integration of distributed renewable energy [J].Transactions of China Electrotechnical Society,2016,31(14):1-10. [5] 兰征,涂春鸣,肖凡,等.电力电子变压器对交直流混合微网功率控制的研究[J].电工技术学报,2015,30(23):50-57. Lan Zheng,Tu Chunming,Xiao Fan,et al.The power control of power electronic transformer inhybrid AC-DC microgrid[J].Transactions of China Electrotechnical Society,2015,30(23):50-57. [6] 王成山,武震,李鹏.微电网关键技术研究[J].电工技术学报,2014,29(2):1-12. Wang Chengshan,Wu Zhen,Li Peng.Research on keytechnologies of microgrid[J].Transactions of China Electrotechnical Society,2014,29(2):1-12. [7] 贾星蓓,窦春霞,岳东,等.基于多代理系统的微电网多尺度能量管理[J].电工技术学报,2016,31(17):63-73. Jia Xingbei,Dou Chunxia,Yue Dong,et al.Multiple-time-scales optimal energy management in microgrid system based on multi-agent-system[J].Transactions of China Electrotechnical Society,2016,31(17):63-73. [8] Dimeas A L,Hatziargyriou N D.Operation of a multiagent system for microgridcontrol[J].IEEE Transactions on Power Systems,2005,20(3):1447-1455. [9] 吴卫民,何远彬,耿攀,等.直流微网研究中的关键技术[J].电工技术学报,2012,27(1):98-106. Wu Weimin,He Yuanbin,Geng Pan,et al.Key technologies for DC micro-grids[J].Transactions of China Electrotechnical Society,2012,27(1):98-106. [10]Pogaku N,Prodanovic＇ M,Green T C.Modeling,analysis and testing of autonomous operation of an inverter-based microgrid[J].IEEE Transactions on Power Electronics,2007,22(2):613-625. [11]Dimeas A L,Hatziargyriou N D.Operation of a multiagent system for microgridcontrol[J].IEEE Transactions on Power Systems,2005,20(3):1447-1455. [12]江晨,曾国宏,吴学智,等.双极性直流微网的分层控制策略[J].电网技术,2015,39(8):2217-2222. Jiang Chen,Zeng Guohong,Wu Xuezhi,et al.Hierarchical control strategy of bipolar-type DC microgrid[J].Power System Technology,2015,39(8):2217-2222. [13]马添翼,金新民,梁建钢.孤岛模式微电网变流器的复合式虚拟阻抗控制策略[J].电工技术学报,2013,28(12):304-312. Ma Tianyi,Jin Xinmin,Liang Jiangang.Multiple virtual impedance control method ofmicro-grid converter under island mode[J].Transactions of China Electrotechnical Society,2013,28(12):304-312. [14]张永明,丁宝,傅卫东,等.基于直流配电与直流微网的电气节能研究[J].电工技术学报,2015,30(增刊1):389-397. Zhang Yongming,Ding Bao,Fu Weidong,et al,Electrical energy conservation based on dc distribution andDC microgrid[J].Transactions of China Electrotechnical Society,2015,30(S1):389-397. [15]Wan C,Huang M,Tse C K,et al.Nonlinear behavior and instability in a three-phase boost rectifier connected to a nonideal power grid with an interacting load[J].IEEE Transactions onPower Electronics,2013,28(7):3255-3265. [16]任春光,李慧蓬,秦文萍,等.三相PWM整流器中灾难性分岔分析[J].中国电机工程学报,2015,35(13):3400-3409. Ren Chunguang,Li Huipeng,Qin Wenping,et al.Analysis of catastrophic bifurcation of three-phase PWM rectifier[J].Proceedings of the CSEE,2015,35(13):3400-3409. [17]刘家赢,韩肖清,王磊,等.直流微电网运行控制策略[J].电网技术,2014,38(9):2356-2362. Liu Jiaying,Han Xiaoqing,Wang Lei,et al.Operation and control strategy of DC microgrid[J].Power System Technology,2014,38(9):2356-2362. [18]王成山,杨占刚,王守相,等.微网实验系统结构特征及控制模式分析[J].电力系统自动化,2010,34(1):99-105. Wang Chengshan,Yang Zhangang,Wang Shouxiang,et al.Analysis of structural characteristics and control approaches ofexperimental microgrid systems[J].Automation of Electric Power Systems,2010,34(1):99-105. [19]熊远生,俞立,徐建明.光伏发电系统多模式接入直流微电网及控制方法[J].电力系统保护与控制,2014,42(12):37-43. Xiong Yuansheng,Yu Li,Xu Jianming.Multimode ofphotovoltaic generation system connected to DC microgridand control methods[J].Power System Protec-tion and Control,2014,42(12):37-43. [20]赵伟然,李光辉,何国庆,等.光伏电站经VSC-HVDC并网拓扑及其控制策略[J].电网技术,2012,36(11):41-45. Zhao Weiran,Li Guanghui,He Guoqing,et al.Topology of connecting photovoltaic power station to power grid viaVSC-HVDC and its control strategy[J].Power SystemTechnology,2012,36(11):41-45.
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