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This work reviews the state-of-the-art in the field of harmonic resonance problems in Wind Power Plants (WPPs). Firstly, a generic WPP is modeled according to the equivalent circuits of its passive and active components. Main focus is put on modeling active components, i.e. the ones based on power converters. Subsequently, pros and cons of frequency and time domain analysis methods are outlined. The...
The power capacitor is widely used for power factor correction in a power system. The damage to power capacitor as a result of harmonic pollution has been a problem in recent years. This may result in power interruption or accidents in industries. In this paper, a new power capacitor protection method is proposed. In this method, a low capacity power converter serially connected to the power capacitor...
A novel based on phase and amplitude control (PAC) three-phase zero-voltage soft-switching (ZVS) PWM converter is presented. In resonance period for the ZVS converter the equivalent circuit, running conditions, the control signals and action waveforms is illustrated. The modulation method adopts the saw-tooth carrier with alternative positive and negative slopes, comparing with the conventional triangular...
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