Author:
Sun Shuqin,Pang Xiaoyu,Zhang Xinhao,Li Gang
Abstract
Abstract
In order to improve the reliability of grid-connected operation of photovoltaic power generation systems, this paper proposes a photovoltaic grid-connected inverter based on supercapacitor energy storage MMC. Compared with traditional battery energy storage devices, the converter has the advantages of environmental friendliness, high energy storage efficiency, and long service life. The control strategy of the system is divided into three parts: carrier phase shift modulation strategy (CPS-SPWM), voltage balance control strategy and super capacitor charging control strategy. Finally, the feasibility of the proposed photovoltaic grid-connected inverter and its control strategy is verified in MATLAB/Simulink. The results show that the system can realize the photovoltaic grid-connected inverter process, realizes soft switching, and has high Energy storage efficiency.
Reference7 articles.
1. Analysis and control of modular multilevel converters with integrated battery energy storage;Vasiladiotis;IEEE Transactions on Power Electronics,2014
2. Analysis and comparative study of different converter modes in modular second life hybrid battery energy storage systems;Mukherjee;IEEE Journal of Emerging and Selected Topics in Power Electronics,2017
3. The age of multilevel converters arrives;Franquelo;Industrial Electronics Magazine IEEE,2008
4. A new hybrid modular multilevel converter with integrated energy storage;Zeng;IEEE Access,2019
5. Evaluation of emerging modular multilevel converters for Bess applications;Soong;IEEE Transactions on Power Delivery,2014