Research on the control of zero-sequence circulating current of paralleled inverters based on Dual-carrier-modulator and PR control

To suppress zero-sequence circulating current in parallel operating inverters with common DC power supply, this paper proposes a new strategy based on Dual-carrier SVPWM and proportional resonant (PR) control, which use two opposite active vectors instead of zero vectors to suppress the higher frequ...

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Bibliographic Details
Published in2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific) pp. 1 - 7
Main Authors Kai Li, Hong-bing Xu, Qian Ma, Lan Ma, Xiao-shuai Xin
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2014
Subjects
Inverters
Resonant frequency
Space vector pulse width modulation
Switches
Vectors
Voltage control
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Summary:To suppress zero-sequence circulating current in parallel operating inverters with common DC power supply, this paper proposes a new strategy based on Dual-carrier SVPWM and proportional resonant (PR) control, which use two opposite active vectors instead of zero vectors to suppress the higher frequency circulating current and reduces the lower frequency circulating current by means of zero-sequence circulating current closed-loop control based on PR controller. It has the advantages of high-efficiency usage of DC voltage, needless carrier synchronization and eliminating the circulating current. Simulation experiments verify the strategy's effectiveness in the two parallel inverters.
DOI:10.1109/ITEC-AP.2014.6940790