Research on Energy Storage Planning and Configuration Based on Spectrum Analysis

With the integration of large amounts of renewable energy into the distribution network, energy storage planning and configuration have become an important component of distribution network planning. However, energy storage construction in China is still in early stages of development. Traditional energy storage configuration strategy research mainly focuses on grid operation, which is difficult to meet the needs of long-term planning in the distribution network. This article proposes a research framework for energy storage planning and configuration based on spectrum analysis. Firstly, taking distribution transformers as an example, calculate its balanced power between electricity load and photovoltaic output. Then, spectrum analysis method is used to split the balanced power and allocate the applicable frequency bands of traditional thermal power generators and energy storage equipment based on the analysis results. Finally, the time series decomposition method is used to extract the peak shaving characteristics, form typical charging and discharging curves and capacity requirements of energy storage equipment, and calculate the capacity requirements of typical types of energy storage equipment. The result can support the distribution network planning and formulation of storage configuration strategies.