Analysis and Design of Filters for Energy Storage System: Optimal Trade-off between Frequency Guarantee and Energy Capacity/Power Rating
Analysis and Design of Filters for Energy Storage System: Optimal Trade-off between Frequency Guarantee and Energy Capacity/Power Rating
复制标题
储能系统滤波器的分析与设计：频率保证与能量容量/额定功率之间的最佳权衡
DOI：
10.1109/tie.2017.2688974
复制
发表时间：
2017
影响因子：
7.7
通讯作者：
K.Z. Liu and J. Tamura
中科院分区：
文献类型：
--
作者：
K. Koiwa;K.Z. Liu and J. Tamura
本文提出了一种新的滤波器设计方法，可以在保持储能系统的容量和额定功率较小的同时，使风力发电输出平滑。风力发电引起电力系统的频率波动。因此，在许多情况下，需要ESS来平滑风力发电机输出的波动。为了提高用传统低通滤波器控制的ESS的性能，本文研究了其他类型的滤波器。首先，通过最坏情况研究揭示了滤波器与ESS能量容量/功率额定值之间的关系。然后，对电力系统相对于风力发电进行频率波动分析，以实现点平滑。最后，基于这些关系，提出了滤波器的多目标设计的元启发式优化方法，以实现输出平滑与ESS的能量容量/功率额定值之间的最优权衡。通过对实际风数据的仿真分析表明，该方法可以有效地抑制电力系统的频率波动，且ESS具有较小的能量容量和额定功率。
This paper proposes a new filter design method that can smooth the wind power generation output while keeping the energy capacity and power rating of the energy storage system (ESS) small. Wind power generation causes frequency fluctuations in power systems. Therefore, in many cases, the ESS is needed for smoothing the fluctuations of wind generator output. In order to improve the performance of the ESS controlled with the conventional low-pass filter (LPF), this paper investigates other types of filters. First, the relations between filter and energy capacity/power rating of the ESS are disclosed through the worst-case study. Then, the frequency fluctuation analysis of the power system with respect to the wind power generation is carried out in order to realize a pin-point smoothing. Finally, a metaheuristic optimization method is proposed for the multiobjective design of the filter based on these relations so as to achieve an optimal tradeoff between the output smoothing and energy capacity/power rating of the ESS. It is shown via simulation analysis with real wind data that the proposed method can suppress the frequency fluctuation of the power system effectively with the ESS having smaller energy capacity and power rating.