电解铝负荷和储能联合平抑风电出力波动研究

Research on the Joint Smoothing of Wind Power Output Fluctuations by Electrolytic Aluminum Load and Energy Storage

大规模风电并网对电力系统频率稳定带来威胁,利用电解铝负荷参与平抑风电出力波动可以有效降低储能的配置需求,减少储能投资成本。首先利用小波包分解技术将风电场出力分解为满足并网规定的低频分量和高频分量,然后利用电解铝负荷和储能平抑剩余的高频分量,考虑电解铝负荷调节成本和储能投资成本,采用SG滤波将高频功率分配给电解铝负荷和储能进行平抑,实现储能的最优容量配置。最后,基于实际风电场数据和电解铝厂负荷数据进行验证,结果表明所提策略能够有效减少储能的配置成本。

The large-scale grid-connected wind power threats the frequency stability of power system.The participation of electrolytic aluminum load in the smoothing of wind power output fluctuation can effectively reduce the demand for energy storage configuration and the energy storage investment costs.Firstly,by using wavelet packet decomposition technology,the wind power output is decomposed into the low-frequency and the high-frequency components that meet the grid connection requirement.Then,the electrolytic aluminum load and the energy storage is used to smooth the remaining high-frequency components.By considering the regulation cost of electrolytic aluminum load and the investment cost of energy storage,SG filtering is used to allocate high-frequency power need to be smoothed to electrolytic aluminum load and energy storage,which achieves the optimal capacity configuration of energy storage.Finally,the strategy is verified based on actual wind farm data and electrolytic aluminum plant load data,the results show that the proposed strategy can effectively reduce the configuration cost of energy storage.