Cooperative Control for Parallel-Connected Battery Energy Storage System of Islanded Power System
Peng Simin1,Dou Zhenlan1,Ling Zhibin1,Cai Xu1,2
1. Wind Power Research Center & School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China 2.State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai 200240 China
Abstract：As a valid alternative,battery energy storage system(BESS) is an effective method to maintain the stability of islanded power system consisting of fluctuant renewable energy sources (RES) and load disturbances. Parallel-connected battery energy storage system (P-BESS) will supply high capacity when BESSs are connected in parallel. The operational principle of P-BESS is analyzed. On the basis of the analysis of operating characteristic of battery system and traditional droop control,a new method based on state of charge (SOC) of battery system is proposed to share load power,named power cooperative control outer loop. Moreover,considering an inherent static error in droop control and the impedance being not pure inductance in middle or low voltage grid,an inner loop control strategy based on linear compensating loop is presented,named voltage amplitude and frequency control. Simulation and experimental results show that not only the voltage and frequency of the system can be kept at desired level,but the load powers can be shared effectively regardless of various loads by the proposed method,which contributes to the balance management of battery system.
彭思敏，窦真兰，凌志斌，蔡旭. 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,Cai Xu. Cooperative Control for Parallel-Connected Battery Energy Storage System of Islanded Power System. Transactions of China Electrotechnical Society, 2013, 28(5): 128-134.
[1] Nehrir M H, Wang C, Strunz K, et al. A review of hybrid renewable/alternative energy systems for electric power generation: configurations, control, and applications [J]. IEEE Transactions on Sustai- nable Energy, 2011, 2(4): 392-403. [2] 邓自刚, 王家素, 王素玉, 等. 高温超导飞轮储能技术发展现状[J]. 电工技术学报, 2008, 23(12): 1-10. Deng Zigang, Wang Jiasu, Wang Suyu, et al. Status of high Tc superconducting flywheel energy storage system[J]. Transactions of China Electrotechnical Society, 2008, 23(12): 1-10. [3] 杨琦, 马世英, 李胜, 等. 微型电网运行及控制设计[J]. 电工技术学报, 2011, 26(1): 267-273. Yang Qi, Ma Shiying, Li Sheng, et al. Design of microgrid operation model and control[J]. Transac- tions of China Electrotechnical Society, 2011, 26(1): 267-273. [4] Perumal B V, Chatterjee J K. Voltage and frequency control of a stand alone brushless wind electric generation using generalized impedance controller[J]. IEEE Transactions on Energy Conversion, 2008, 23 (2): 632-641. [5] 彭思敏, 曹云峰, 蔡旭. 大型蓄电池储能系统接入微电网方式及控制策略[J]. 电力系统自动化, 2011, 35(16): 38-42. Peng Simin, Cao Yunfeng, Cai Xu. Control of large scale battery energy storage system interface to microgrid[J]. Automation of Electric Power Systems, 2011, 35(16): 38-42. [6] Engler I A. Applicability of droops in low voltage grids[J]. International Journal of Distributed Energy Resources, 2005, 1(1): 3-15. [7] 陈达威, 朱桂萍. 低压微电网中的功率传输特性[J]. 电工技术学报, 2010, 25(7): 117-123. Chen Dawei, Zhu Guiping. Power tranmission charac- tertics of low voltage microgrids[J]. Transactions of China Electrotechnical Society, 2010, 25(7): 117-123. [8] Lopes J A P, Moreira C L, Madureira A G. Defining control strategies for microgrids islanded operation [J]. IEEE Transaction on Power Systems, 2006, 21(2): 916-924. [9] Li Y, Li Y W. Power management of inverter interfaced autonomous microgrid based on virtual frequency-voltage frame[J]. IEEE Transactions on Smart Grid, 2011, 2(1): 30-40. [10] 张纯江, 王晓寰, 薛海芬, 等. 微网中三相逆变器类功率下垂控制和并联系统小信号建模与分析[J]. 电工技术学报, 2012, 27(1): 32-39. Zhang Chunjiang, Wang Xiaohuan, Xue Haifen, et al. A quasi-power droop control of three-phase inverter and small signal modeling and analysis of parallel system in micro-grid[J]. Transactions of China Electrotechnical Society, 2012, 27(1): 32-39. [11] Mohamed Y A R I, Saadany E F E. Adaptive Decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids[J]. IEEE Transactions on Power Systems, 2008, 23 (6): 2806-2816. [12] 高明煜, 何志伟, 徐杰. 基于采样点卡尔曼滤波的动力电池SOC估计[J]. 电工技术学报, 2011, 16(11): 161-167. Gao Mingyu, He Zhiwei, Xu Jie. Sigma point Kalman filter based SOC esctmation for power supply battery [J]. Transactions of China Electrotechnical Society, 2011, 16(11): 161-167.
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