Evaluation of trapezium current mode in comparison to the discontinuous current Mode for Single Phase Grid-tied Inverter

A grid-tied inverter can be designed to operate in boundary conduction mode or discontinuous current mode to achieve high efficiency and high power density. However, the switching frequency variation in boundary conduction mode can be a problem. Although the switching frequency in discontinuous curr...

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Bibliographic Details
Published inIECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society pp. 1125 - 1132
Main Authors JianTao Zhang, Barrera-Cardenas, Rene A., Isobe, Takanori, Hiroshi, Tadano
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
Capacitors
discontinuous current mode (DCM)
Grid-tied inverter
Inductance
Inductors
Inverters
Switches
Switching frequency
trapezium current mode (TPCM)
Zero voltage switching
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Summary:A grid-tied inverter can be designed to operate in boundary conduction mode or discontinuous current mode to achieve high efficiency and high power density. However, the switching frequency variation in boundary conduction mode can be a problem. Although the switching frequency in discontinuous current mode is fixed, the output current becomes distorted due to the resonant between inductor and parasitic output capacitors of switching devices during zero current intervals. The distorted output current may have influences on the total harmonic distortion. A trapezium current mode has been proposed to solve these problems. In this paper, the performance evaluation including waveform analysis, efficiency comparison and conduction loss analysis of trapezium current mode in comparison to the discontinuous current mode is performed. Both operations are implemented in a 600 W grid-tied inverter.
DOI:10.1109/IECON.2017.8216193