Research on SVPWM modulation strategy based on three-level typical topology structure
Currently,the development of new energy technologies in our country faces problems such as large external factors affecting power generation and unstable output of electrical energy.Application of high power converters are the key solution to solve this problem,and the multi-level inverters can meet the requirements of high voltage and high power transformation of high-power converters.Taking the T-type three-level inverter as the research object,this article analyzes its modulation algorithm and midpoint potential balance problem,and conducts simulation research.Based on the principle of SVPWM modulation algorithm,the adverse effects of midpoint potential imbalance on space voltage vector are analyzed.A simulation model is built based on MATLAB/Simulink platform,and the effectiveness of three-level SVPWM modulation algorithm on midpoint balance control strategy is verified by the simulative results.The proposed method compensates for the shortcomings of complex algorithm operations and has a promoting effect on the engineering application of three-level and even multi-level inverters.
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