A Single Phase Quasi H-Bridge Boost Inverter with Common Ground for Grid connected Applications

2018 4th International Conference on Environment and Renewable Energy

生态环境科学;能源学

Tran, T.T.^1 ; Nguyen, M.K.^2 ; Lim, Y.C.^1 ; Choi, J.H.^1

Chonnam National University, Korea, Republic of^1

Chosun University, Korea, Republic of^2

关键词: BOOST converter;    Boost inverters;    DC voltage sources;    H-bridge inverters;    Operating principles;    Output voltages;    Photovoltaic applications;    Switched capacitor;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/159/1/012023/pdf
DOI  :  10.1088/1755-1315/159/1/012023

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper presents a single-phase quasi H-bridge boost inverter with common ground for grid-connected applications. In this topology, the ground of ac grid and input dc voltage source is connected together directly. So, the ground leakage current is significantly limited. Furthermore, by combining a switched-capacitor boost converter with quasi H-bridge inverter, the RMS of output voltage can be greater than input dc voltage source. With the introduced simple PWM strategy, single phase quasi H-bridge boost inverter with common ground is applicable to photovoltaic applications where a low dc voltage source have to be inverted to a desired ac output voltage without transformer. The operating principles and circuit analysis for the single phase quasi H-bridge boost inverter with common ground are described. Simulation results by PSIM software are implemented to validate the performance of the introduced topology.