风电场混合储能的小波包-SOC分区功率控制
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四川大学电气信息学院 智能电网四川省重点实验室成都610065

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TM72TH39

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四川省科技支撑项目(2014JY0191)资助


Wavelet packet-SOC partitioned power control of hybrid energy storage for wind farm
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Intelligent Electric Power Grid Key Laboratory of Sichuan Province,School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,China

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    摘要:

    大规模可再生能源并网引起的一系列问题使得储能技术成为未来能源转型的重要依托与突破方向。为减小系统调节压力,采用蓄电池和超级电容组成混合储能以补偿风功率预测误差。利用小波包分解可获取信号更多细节信息的优势,根据混合储能的性能特点和响应速度,确定分解层次并实现混合储能充放电功率的初始分配。考虑实际应用中容量约束,提出荷电状态(SOC)分区功率控制策略对储能的功率指令进行修正,实现充放电功率的优化分配,提高补偿效果。应用结果表明,所提策略能够充分利用混合储能互补的性能优势有效补偿风功率预测误差,同时保证储能的长期稳定运行。

    Abstract:

    The largescale integration of renewable energy resources makes the energy storage technology the vital support and breakthrough direction of future energy transitions.In order to reduce the pressure of system adjustment, hybrid energy storage (HES) based on battery and supercapacitor is developed to compensate wind power forecast errors.According to the performance characteristics and the response speed of HES,the decomposition level is determined and the initial allocation for charging/discharging power of HES is realized, utilizing the advantage of obtaining more detailed information by wavelet packet decomposition. Considering capacity constraints of HES in practical applications,a SOC partitioned power control strategy is proposed to modify the power instructions of energy storage devices and an optimized power distribution is achieved, improving compensation effect simultaneously. Application results show that the proposed strategy can compensate wind power forecast errors effectively by taking full advantages of complementary superiorities of HES,ensuring the longterm safe and stable operation of energy storage devices.

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陈科彬,邱晓燕,刘波.风电场混合储能的小波包-SOC分区功率控制[J].仪器仪表学报,2017,38(8):2078-2085

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  • 在线发布日期: 2017-09-04
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