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Slightly unbalanced grid voltage can cause large unbalanced current and non-characteristic harmonics in three-phase uncontrolled rectifier. This study proposes an accurate model to analyse the performance of three-phase uncontrolled rectifier in slightly unbalanced grid. Three appreciative operation modes (three-phase rectifier, double-phase rectifier and single-phase rectifier with discontinuous...
Due to the shunt loss, switching loss and pulse delay, the DC capacitors voltage of cascade STATCOM can't maintain balanced which would influence the output voltage harmonics and even its normal operation. A novel DC capacitors voltage balancing control strategy based on individual phase instantaneous current tracking is proposed in this paper, the active power is properly distributed among the H-bridge...
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