平滑风电出力的风储联合系统能量管理协调控制研究

Ｒesearch on Energy Management and Coordination Control for Combined System of Wind Power and Energy Storage to Smooth Wind Power Output

摘要:

为实现风电友好并网，采用混合储能系统平抑风电有功出力波动。首先，针对风功率的随机波动特性，采用滑 动平均滤波算法与自适应小波包分解方法分别得到目标并网功率，结合风电并网波动率要求，比较不同目标功率获 取方法的优劣。其次，对于并网功率缺额和盈余部分，由蓄电池 － 超级电容构成的混合储能系统进行补偿和消纳，并 根据各储能设备的不同性能，按照频率分配各储能设备的功率指令。然后，结合储能设备荷电状态和出力的限值约 束，提出一种风储联合系统协调控制策略，实现储能设备间的能量互补，延长储能设备的使用寿命。最后，基于历史风 电数据的仿真分析，验证所提方法的有效性。

Abstract:

In order to realize wind power integration with the grid friendly，hybrid energy storage system is adopted to mitigate wind power fluctuation． Firstly，according to the random fluctuation characteristics of wind power，the moving average filtering algorithm and adaptive wavelet packet decomposition method are used to obtain the grid － connected power，and the advantages and disadvantages of different methods are analyzed according to the fluctuation requirements of wind power integration with the grid． Secondly，for the power vacancies and surpluses of grid － connected power，the hybrid energy storage system composed of battery and supercapacitor is adopted to carry out the compensation and absorption，and the power instructions of each energy storage equipment are allocated according to the different response frequency of energy storage equipment because of the different performances． Then，combined with the state of charge ( SOC) of energy storage equipment and output limit constraints，a coordinated control strategy of the combined system of wind power and energy storage is proposed to achieve energy complementarity and prolong the service life of energy storage equipment． Finally，based on simulation analysis of historical wind power data，the effectiveness of the proposed method is verified．