Research on optimal configuration of hybrid energy storage system based on improved CEEMDAN

Abstract

Reasonable capacity configuration of energy storage system can enhance operation reliability and economic efficiency of microgrid. Considering the influence of the operating characteristics of energy storage device cycling life, a capacity configuration optimization method for hybrid energy storage system (HESS) is proposed in this paper to reduce power fluctuations in microgrid and extend the service life of energy storage system. The improved Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) is adopted to realize time–frequency analysis of the net load power of the microgrid. The hybrid energy storage capacity configuration optimization model with the full-life economic cost as the goal is established, and the optimal filter order and corresponding energy storage configuration scheme are determined. The example results show that the proposed hybrid energy storage configuration method can not only suppress power fluctuations and reduce the economic cost, but also improve the mode mixing phenomenon and achieve more reasonable capacity configuration. The proposed method is applicable to the capacity configuration optimization of the HESS.

Keywords

• Hybrid energy storage system (HESS)
• Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN)
• Filter order
• Full-life economic cost