Research on cascaded buck-boost bidirectional converter and it's control strategy
LIU Hanqing
GONG Liang
LUO Jinhua
GAO Zhendong
YANG Yajun
Abstract：In this paper,a cascaded buck-boost bidirectional converter and its control strategy are proposed,which aims to improve the charge-discharge control performance of battery energy storage system.The converter consists of a pre-buck converter and a post-boost converter,with an LCL filter in the middle,which can operate in Buck,Boost,Buck-Boost,and Boost-Buck modes.In order to verify the converter control strategy,a simulation experiment system was built,and the input voltage of the system was 100 V,and the switching frequency was 50 kHz.The results show that the cascaded buck-boost bidirectional converter can achieve a smooth transition between different working modes and small switching loss during the working process.When the output voltage is 90 V,the ripple percentage is only 1%.
Keywords：cascaded buck-boost converterbidirectional convertermultimodal
Publication Date：2025-06-25
Pages：3( 57-59 )