退役电池梯次利用对新能源消纳影响的研究

Effect of Second-use of Retired Batteries on New Energy Consumption

为提高退役电池梯次利用收益,建立了退役电池平抑新能源功率预测误差模型和改善等效负荷峰谷差模型。首先分析新能源功率预测误差的影响以及新能源波动对等效负荷峰谷差和等效负荷波动率的影响,然后设计退役电池能量管理系统,通过小波包分解方法将低频能量分量分配给退役电池,并根据等效负荷大小确定退役电池充放电时间和功率。最后利用实际算例仿真,结果表明提出的退役电池梯次利用模型可以提高新能源功率预测准确率、改善峰谷特性、降低等效负荷波动率,并大幅提高收益。

To improve the utilization benefits of second-use of retired batteries,this paper establishes a retired battery to stabilize the new energy prediction error model and improve the equivalent load peak-valley difference model.Firstly,the paper analyzes the impact of new energy prediction errors and the impact of fluctuation on the peak-valley difference and the fluctuation rate of the equivalent load;secondly,the paper designs a retired battery energy management system to distribute low-frequency energy components to the retired battery through the wavelet packet decomposition method,and the charge and discharge time and power of the retired battery are determined according to the equivalent load;finally,examples are used for simulation and the results show that the second-use model of retired batteries can improve the accuracy of new energy prediction,improve the peak and valley characteristics,reduce the equivalent load fluctuation rate,and greatly increase the profits.