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http://dx.doi.org/10.6113/TKPE.2012.17.5.409

A New On-Line Dead-Time Compensator for Single-Phase PV Inverter  

Vu, Trung-Kien (R&D Center, KACO newenergy)
Lee, Sang-Hoey (R&D Center, Doosan Heavy Industrial Corporation)
Cha, Han-Ju (Dept. of Electrical Engineering, Chungnam Nat'l Univ.)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.17, no.5, 2012 , pp. 409-415 More about this Journal
Abstract
This paper presents a new software-based on-line dead-time compensation technique for a single-phase grid-connected photovoltaic (PV) inverter system. To prevent a short circuit in the inverter arms, a switching delay time must be inserted in the pulse width modulation (PWM) signals. This causes the dead-time effect, which degrades the system performance around zero-crossing point of the output current. To reduce the dead-time effect around the zero-crossing point of grid current, a harmonic mitigation of grid current is used as an additional part of the synchronous frame current control scheme. This additional task mitigates the harmonic components caused by the dead-time from the grid current. Simulation and experimental results are shown to verify the effectiveness of the proposed dead-time compensation method in the single-phase grid-connected inverter system.
Keywords
dead-time compensator; PV inverter; single-phase; adaptive filter;
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Times Cited By KSCI : 1  (Citation Analysis)
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