平滑风电功率的电池储能系统优化控制策略
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摘要
针对风电输出功率的随机性、波动性等特点,在计及风电功率波动和电池储能系统BESS(battery energy storage system)的荷电状态SOC(state of charge)等约束条件的基础上,提出一种基于变滑动平均滤波项数的风电功率波动平滑控制策略。该方法根据风电功率波动和BESS的SOC值,对滑动平均滤波中的项数进行调节,进而调节输出功率的目标值,使BESS的SOC稳定在一定的范围内,避免了BESS的过充/放电,并且提高了系统输出功率平滑效果。仿真分析表明,本文方法在BESS的SOC稳定在限定范围的同时,20 min内风电功率波动率控制在10%内,20 min功率波动累加和比普通滑动平均滤波策略下减少了20.5%,有效提高了风电输出功率的平滑性。
According to the randomness and volatility of the wind power output,taking into account the constraints such as wind power fluctuations and current state of charge(SOC)of battery energy storage system(BESS),a smoothing control strategy based on variable number of terms of slip average filter is proposed. This method can regulate the number of terms of slip average filter according to wind power fluctuations and the SOC value of BESS,thus the target of the output power is changed,and thereby the SOC of BESS is stabled in a certain range,while over-charging/overdischarging of the BESS is avoided,and the smoothness of output power of wind power and energy storage system is improved. Simulation results show that the method proposed in this paper can make the SOC of the BESS stabled in a limited range,and at the same time control wind power fluctuation rate within 20 min below 10%. Also the accumulation of power fluctuations within 20 min is reduced by 20.5% than that of ordinary slip average filter strategy,therefore the smoothness of wind power output is improved effectively.
According to the randomness and volatility of the wind power output,taking into account the constraints such as wind power fluctuations and current state of charge(SOC)of battery energy storage system(BESS),a smoothing control strategy based on variable number of terms of slip average filter is proposed. This method can regulate the number of terms of slip average filter according to wind power fluctuations and the SOC value of BESS,thus the target of the output power is changed,and thereby the SOC of BESS is stabled in a certain range,while over-charging/overdischarging of the BESS is avoided,and the smoothness of output power of wind power and energy storage system is improved. Simulation results show that the method proposed in this paper can make the SOC of the BESS stabled in a limited range,and at the same time control wind power fluctuation rate within 20 min below 10%. Also the accumulation of power fluctuations within 20 min is reduced by 20.5% than that of ordinary slip average filter strategy,therefore the smoothness of wind power output is improved effectively.
引文
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[13]丁明,吴建锋,朱承治,等(Ding Ming,Wu Jianfeng,Wu Chengzhi,et al).具备荷电状态调节功能的储能系统实时平滑控制策略(A real-time smoothing control strategy with SOC adjustment function of storage systems)[J].中国电机工程学报(Proceedings of the CSEE),2013,33(1):22-29.
[14]Yoshimoto K,Nanahara T,Koshimizu G.Analysis of data obtained in demonstration test about battery energy storage system to mitigate output fluctuation of wind farm[C]//CIGRE/IEEE PES Joint Symposium Integration of Wide-Scale Renewable Resources Into the Power Delivery System.Calgary,Canada,2009.
[15]吴理博,赵争鸣,刘建政,等(Wu Libo,Zhao Zhengming,Liu Jianzheng,et al).独立光伏照明系统中的能量管理控制(A novel energy management and control for standalone photovoltaic lighting system)[J].中国电机工程学报(Proceedings of the CSEE),2005,25(22):68-72.
[16]梁才浩,段献忠(Liang Caihao,Duan Xianzhong).分布式发电及其对电力系统的影响(Distributed generation and its impact on power system)[J].电力系统自动化(Automation of Electric Power Systems),2001,25(12):53-56.
[17]Billinton R,Yi Gao.Multistate wind energy conversion system models for adequacy assessment of generating systems incorporating wind energy[J].IEEE Trans on Energy Conversion,2008,23(1):163-170.
[2]Barton J P,Infield D G.Energy storage and its use with intermittent renewable energy[J].IEEE Trans on Energy Conversion,2004,19(2):441-448.
[3]陈光堂,邱晓燕,林伟(Chen Guangtang,Qiu Xiaoyan,Lin Wei).含钒电池储能的微电网负荷优化分配(Optimal load distribution of microgrid with energy storage system composed of vanadium redox flow battery)[J].电网技术(Power System Technology),2012,36(5):85-91.
[4]吴雨,潘文霞,冯蒙霜,等(Wu Yu,Pan Wenxia,Feng Mengshuang,et al).基于混合储能的微电网功率控制策略(Power control strategy for microgrid based on hybrid energy storage system)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2013,25(2):110-115.
[5]贾俊川,刘晋,张一工(Jia Junchuan,Liu Jin,Zhang Yigong).集成嵌入式储能的双馈风力发电系统功率控制(Power control of DFIG based wind power system incorporated with embedded energy storage)[J].电力系统自动化(Automation of Electric Power Systems),2010,34(15):80-84.
[6]刘昌金,胡长生,李霄,等(Liu Changjin,Hu Changsheng,Li Xiao,et al).基于超导储能系统的风电场功率控制系统设计(Design of SMES control system for smoothing power fluctuations in wind farms)[J].电力系统自动化(Automation of Electric Power Systems),2008,32(16):83-88.
[7]Jiang Zhenhua,Yu Xunwei.Modeling and control of an integrated wind power generation and energy storage system[C]//IEEE Power and Energy Society General Meeting.Calgary,Canada,2009.
[8]宇航(Yu Hang).利用储能系统平抑风电功率波动的仿真研究(Simulation Research on Smoothing the Wind Power Fluctuation by Using Energy Storage System)[D].吉林:东北电力大学电气工程学院(Jilin:School of Electrical Engineering,Northeast Dianli University),2010.
[9]Yoshimoto K,Nanahara T,Koshimizu G,et al.New control method for regulating state-of-charge of a battery in hybrid wind power/battery energy storage system[C]//IEEE/PES Power Systems Conference and Exposition.Atlanta,USA,2006.
[10]张野,郭力,贾宏杰,等(Zhang Ye,Guo Li,Jia Hongjie,et al).基于电池荷电状态和可变滤波时间常数的储能控制方法(An energy storage control method based on state of charge and variable filter time constant)[J].电力系统自动化(Automation of Electric Power Systems),2012,36(6):34-38,62.
[11]Tesfahunegn S G,Ulleberg O,Vie P J S,et al.Optimal shifting of photovoltaic and load fluctuations from fuel cell and electrolyzer to lead acid battery in a photovoltaic/hydrogen standalone power system for improved performance and life time[J].Journal of Power Sources,2011,196(23):10401-10414.
[12]严干贵,朱星旭,李军徽,等(Yan Gangui,Zhu Xingxu,Li Junhui,et al).内蕴运行寿命测算的混合储能系统控制策略设计(Control strategy design for hybrid energy storage system with intrinsic operation life measurement and calculation)[J].电力系统自动化(Automation of Electric Power Systems),2013,37(1):110-114.
[13]丁明,吴建锋,朱承治,等(Ding Ming,Wu Jianfeng,Wu Chengzhi,et al).具备荷电状态调节功能的储能系统实时平滑控制策略(A real-time smoothing control strategy with SOC adjustment function of storage systems)[J].中国电机工程学报(Proceedings of the CSEE),2013,33(1):22-29.
[14]Yoshimoto K,Nanahara T,Koshimizu G.Analysis of data obtained in demonstration test about battery energy storage system to mitigate output fluctuation of wind farm[C]//CIGRE/IEEE PES Joint Symposium Integration of Wide-Scale Renewable Resources Into the Power Delivery System.Calgary,Canada,2009.
[15]吴理博,赵争鸣,刘建政,等(Wu Libo,Zhao Zhengming,Liu Jianzheng,et al).独立光伏照明系统中的能量管理控制(A novel energy management and control for standalone photovoltaic lighting system)[J].中国电机工程学报(Proceedings of the CSEE),2005,25(22):68-72.
[16]梁才浩,段献忠(Liang Caihao,Duan Xianzhong).分布式发电及其对电力系统的影响(Distributed generation and its impact on power system)[J].电力系统自动化(Automation of Electric Power Systems),2001,25(12):53-56.
[17]Billinton R,Yi Gao.Multistate wind energy conversion system models for adequacy assessment of generating systems incorporating wind energy[J].IEEE Trans on Energy Conversion,2008,23(1):163-170.