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In this paper, a circulating current elimination scheme for common dc bus parallel inverter system is proposed. A dead-time elimination sinusoidal pulse width modulation (SPWM) is presented to overcome the circulating current caused by dead-time effects. The circulating current elimination scheme combines dead-time elimination SPWM and double loop control method, which is compose of an outer voltage...
Synchronization is a key issue of an inverter-dominated distributed generator to enhance its uninterrupted operation ability in abnormal utility voltage conditions. In this paper, an adaptive-filter-oriented algorithm is proposed to fast and effectively synchronize the positive- and negative-sequence fundamental, even the desired harmonic components of utility voltage. The proposed method consists...
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