Efficiency Improvement of Grid-Tied Inverters at Low Input Power Using Pulse-Skipping Control Strategy

A pulse-skipping control strategy is proposed to improve efficiency of grid-tied inverters at light loads. To maximize the efficiency of pulse-skipping operation mode, three key parameters are identified and optimized based on a loss model, which is developed to find the maximal efficiency points us...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2010-12, Vol.25 (12), p.3129-3138
Main Authors: Hu, Haibing, Al-Hoor, Wisam, Kutkut, Nasser H., Batarseh, Issa, Shen, Z. John
Format: Article
Language:English
Subjects:
Capacitors
Computational modeling
Computer simulation
Efficiency
Electronics
Integrated circuit modeling
inverter
Inverters
Mathematical model
Mathematical models
Optimization
Prototypes
pulse skipping
renewable sources
Searching
Strategy
Synchronization
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Summary:A pulse-skipping control strategy is proposed to improve efficiency of grid-tied inverters at light loads. To maximize the efficiency of pulse-skipping operation mode, three key parameters are identified and optimized based on a loss model, which is developed to find the maximal efficiency points using a 3-D search technique. A 200-W prototype inverter was setup to verify the proposed control strategy. The experimental results show that the proposed pulse-skipping control strategy greatly improves the inverter's efficiency at light loads and match the simulation results fairly well, thus, validating the proposed optimization method for pulse-skipping operation.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2010.2080690