Coordinated Control for PV/Storage Hybrid Islanded Microgrid Considering SOC Balancing
Zhang Jiyuan1,2, Shu Jie1,2, Ning Jia1,2, Wang Hao1
1. Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Guangzhou 510640 China; 2. University of Chinese Academy of Sciences Beijing 100049 China
Abstract：For the hybrid microgrid composed of multiple distributed generations, considering the coordinated control of photovoltaic and energy storage system in islanded mode, the energy management strategy is studied. Firstly, an improved dynamic droop control method considering SOC balancing is proposed, to enhance the power balancing between different energy storage systems and prolong the service life of the battery. Secondly, since the photovoltaic output power fluctuation and SOC states variation, a multi-mode switching control algorithm for distributed power supplies is designed. Depending on the scenarios, it operates in different control modes to achieve energy management objectives of the decentralized microgrid. By constructing the Matlab/Simulink model, the energy storage system can quickly allocate the power according to the SOC state, and coordinate the PV system to maintain the stable operation of the microgrid, thus verifying the feasibility and effectiveness of the proposed control strategy.
张继元, 舒杰, 宁佳, 王浩. 考虑SOC自均衡的光储独立微电网协调控制[J]. 电工技术学报, 2018, 33(zk2): 527-537.
Zhang Jiyuan, Shu Jie, Ning Jia, Wang Hao. Coordinated Control for PV/Storage Hybrid Islanded Microgrid Considering SOC Balancing. Transactions of China Electrotechnical Society, 2018, 33(zk2): 527-537.
[1] 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. [2] Wang Chengshan, Yang Xiansheng, Wu Zhen, et al.A highly integrated and reconfigurable microgrid testbed with hybrid distributed energy sources[J]. IEEE Transactions on Smart Grid, 2016, 7(1): 451-459. [3] 肖朝霞, 贾双, 朱建国. 风光储微电网并网联络线功率控制策略[J]. 电工技术学报, 2017, 32(15): 169-179. Xiao Zhaoxia, Jia Shuang, Zhu Jianguo.Tie-line power flow control strategy for a grid-connected microgrid containing wind, photovoltaic and battery[J]. Transactions of China Electrotechnical Society, 2017, 32(15): 169-179. [4] 马益平. 考虑电动汽车调度的微电网混合储能容量优化配置[J]. 电力系统保护与控制, 2017, 45(23): 98-107. Ma Yiping.Hybrid energy storage capacity optimi- zation configuration for micro-grid considering EV scheduling[J]. Power System Protection and Control, 2017, 45(23): 98-107. [5] Dragicevic T, Guerrero J M, Vasquez J C, et al.Supervisory control of an adaptive-droop regulated DC microgrid with battery management capability[J]. IEEE Transactions on Power Electronics, 2014, 29(2): 695-706. [6] 肖朝霞, 樊世军, 杨庆新. 基于分层控制策略的光伏-蓄电池系统动态提高并网点功率因数[J]. 电工技术学报, 2016, 31(7): 107-117. Xiao Zhaoxia, Fan Shijun, Yang Qingxin.Dyna- mically improving the power factor of PCC using photovoltaic-battery generation system based on hierarchical control strategy[J]. Transactions of China Electrotechnical Society, 2016, 31(7): 107-117. [7] 徐从启, 贾桂芝, 李祖贤, 等. 考虑多能量流的光柴储独立微电网协调控制[J]. 电气技术, 2017, 18(4): 61-65. Xu Congqi, Jia Guizhi, Li Zuxian, et al.Coordination control of isolated microgrid composed of diesel, photovoltaic and battery considering multiple power flow[J]. Electrical Engineering, 2017, 18(4): 61-65. [8] Nassar M E, Salama M M M. A novel branch-based power flow algorithm for islanded AC microgrids[J]. Electric Power Systems Research, 2017, 146: 51-62. [9] He Jinwei, Li Yunwei.An enhanced microgrid load demand sharing strategy[J]. IEEE Transactions on Power Electronics, 2012, 27(9): 3984-3995. [10] Wu Dan, Tang Fen, Dragicevic T, et al.Autonomous active power control for islanded AC microgrids with photovoltaic generation and energy storage system[J]. IEEE Transactions on Energy Conversion, 2014, 29(4): 882-892. [11] Matos J G D, Silva F S F E, Ribeiro L A D S. Power control in AC isolated microgrids with renewable energy sources and energy storage systems[J]. IEEE Transactions on Industrial Electronics, 2015, 62(6): 3490-3498. [12] 李江, 张永利, 刘强, 等. 分布式光储微电网系统并网控制策略研究[J]. 电力系统保护与控制, 2017, 45(23): 90-97. Li Jiang, Zhang Yongli, Liu Qiang, et al.Research on grid-connected control strategy of distributed PV- storage microgrid system[J]. Power System Pro- tection and Control, 2017, 45(23): 90-97. [13] Mahmood H, Michaelson D, Jin J.Strategies for independent deployment and autonomous control of PV and battery units in islanded microgrids[J]. IEEE Journal of Emerging & Selected Topics in Power Electronics, 2015, 3(3): 742-755. [14] Mahmood H, Michaelson D, Jiang Jin.Decentralized power management of a PV/battery hybrid unit in a droop-controlled islanded microgrid[J]. IEEE Transa- ctions on Power Electronics, 2015, 30(12): 7215-7229. [15] Adhikari S, Li Fangxing.Coordinated V-f and P-Q control of solar photovoltaic generators with MPPT and battery storage in microgrids[J]. IEEE Transactions on Smart Grid, 2014, 5(3): 1270-1281. [16] Lu Xiaonan, Sun Kai, Guerrero J M, et al.Double quadrant state of charge based droop control method for distributed energy storage systems in autonomous DC microgrids[J]. IEEE Transactions on Smart Grid, 2015, 6(1): 147-157. [17] 李鹏程, 张纯江, 袁然然, 等. 改进SOC下垂控制的分布式储能系统负荷电流分配方法[J]. 电机工程学报, 2017, 37(13): 3746-3754. Li Pengcheng, Zhang Chunjiang, Yuan Ranran, et al.Load current sharing method of distributed energy storage systems by improved SOC drooping control[J]. Proceedings of the CSEE, 2017, 37(13): 3746-3754. [18] 米阳, 吴彦伟, 符杨, 等. 独立光储直流微电网分层协调控制[J]. 电力系统保护与控制, 2017, 45(8): 37-45. Mi Yang, Wu Yanwei, Fu Yang, et al.Hierarchical coordinated control of island DC microgrid with photovoltaic and storage system[J]. Power System Protection and Control, 2017, 45(8): 37-45. [19] 王炜信, 段建东, 张润松, 等. 孤岛电网中多储能设备SOC一致性优化策略[J]. 电工技术学报, 2015, 30(23): 126-135. Wang Weixin, Duan Jiandong, Zhang Runsong, et al.Optimal state-of-charge balancing control for paralleled battery energy storage devices in islanded microgrid[J]. Transactions of China Electrotechnical Society, 2015, 30(23): 126-135. [20] 彭思敏, 窦真兰, 凌志斌, 等. 并联型储能系统孤网运行协调控制策略[J]. 电工技术学报, 2013, 28(5): 128-134. Peng Simin, Dou Zhenlan, Ling Zhibin, et al.Cooperative control for parallel-connected battery energy storage system of islanded power system[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 128-134. [21] Karimi Y, Oraee H, Mem S, et al.Decentralized method for load sharing and power management in a PV/battery hybrid source islanded microgrid[J]. IEEE Transactions on Power Electronics, 2017, 32(8): 6135-6144. [22] 吴青峰, 孙孝峰, 王雅楠, 等. 基于分布式下垂控制的微电网分布式储能系统SOC平衡策略[J]. 电工技术学报, 2018, 33(6): 1247-1256. Wu Qingfeng, Sun Xiaofeng, Wang Ya’nan, et al.A distributed control strategy for SOC balancing of distributed energy storage systems in microgrid[J]. Transactions of China Electrotechnical Society, 2018, 33(6): 1247-1256. [23] Papadaskalopoulos D, Pudjianto D, Strbac G.Decentralized coordination of microgrids with flexible demand and energy storage[J]. IEEE Transa- ctions on Sustainable Energy, 2014, 5(4): 1406-1414. [24] Mahmood H, Michaelson D, Jiang Jin.Accurate reactive power sharing in an islanded microgrid using adaptive virtual impedances[J]. IEEE Transactions on Sustainable Energy, 2015, 30(3): 1605-1617.
2018, Vol. 33 
