LOW VOLTAGE APPARATUS ›› 2021, Vol. 0 ›› Issue (8): 70-75.doi: 10.16628/j.cnki.2095-8188.2021.08.013

• Distributed Generation and Grid-Connection Technology • Previous Articles     Next Articles

Design of Energy Storage Power Converter

WANG Xiaoping, CHEN Yanlian, MAO Xingkui   

  1. College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350108,China
  • Received:2021-03-16 Online:2021-08-30 Published:2021-10-14

Abstract:

The charge discharge switching control and parameter design of energy storage PCS (Power Conversion System) are of great significance to optimize the performance and efficiency of energy storage system.Aiming at the problems of high reactive power and serious current distortion in charge discharge switching of PCS,a linear soft switching method based on single current loop decoupling control is proposed.Firstly,the mathematical model of energy storage PCS is established,and the decoupling control block diagram of single current loop is designed.Secondly,the problems of current distortion and impact in charging and discharging switching of energy storage PCS are analyzed.The control strategy of charging and discharging soft switching by changing the direct axis current command linearly is proposed,and the key hardware parameters and software program block diagram are designed.Finally,a 12 kW bidirectional PCS prototype is built according to the designed parameters,and the correctness of the parameter design and the effectiveness of the linear soft switching control strategy are verified by experiments.

Key words: energy storage PCS, LCL filter, parameter design, soft switching

CLC Number: