可再生能源2023，Vol.41Issue(12)：1626-1633,8.
基于VMD-STFT提升源-荷互动可靠性的混合储能优化配置
Optimized configuration of hybrid energy storage based on VMD-STFT to improve source-charge interaction reliability
摘要
Abstract
To address the source-load supply-demand imbalance within an independent microgrid,a hybrid energy storage system combining power-based and energy-based energy storage is added on the demand side of the islanded state microgrid in this paper.The net load power sequence signal satisfying the power balance constraint within the microgrid is optimally configured for hybrid energy storage using the variational modal decomposition(VMD)method,and the optimal number of decomposition layers is determined,applying the central frequency method combined with Pearson correlation coefficient(Pearson),the decomposition results are analyzed in time-frequency using short-time Fourier transform(STFT)to derive the modal mixing of each component,and then reconstruct and allocate the high and low frequency power according to the charging and discharging frequency response characteristics of different types of energy storage.For the results,the rated capacity and power are configured using the reliable capacity calculation method,calculate the total cost of the configuration,and measure the reliability of the system power supply based on the state of charge(SOC)of the energy storage elements.The results of the comparison between the empirical mode decomposition method(EMD)and the traditional first-order low-pass filtering method show that the VMD decomposition method can effectively overcome the modal mixing phenomenon of EMD,and improve the economy and power supply reliability of the system configuration.关键词
独立微电网/混合储能/变分模态分解法/短时傅里叶变换Key words
independent microgrid/hybrid energy storage/VMD/STFT分类
能源科技引用本文复制引用
马永翔,唐浦容,闫群民,李宏刚,淡文国..基于VMD-STFT提升源-荷互动可靠性的混合储能优化配置[J].可再生能源,2023,41(12):1626-1633,8.基金项目
国家自然科学基金一般面上项目(No.62176146). （No.62176146）
