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A Zero-Voltage Switching single-phase grid-connected inverter and its zero voltage switching modulation scheme (ZVS SPWM) have been proposed to increase efficiency and power density before. With an auxiliary resonant circuit, all the switching devices are able to realize zero-voltage switching turn-on with ZVS-SPWM. It is found that ZVS-SPWM affects the output power quality. The output voltage model...
In this paper, the relationship between the resonant control and repetitive control (RC) are investigated. Then through the experiment these two control methods are compared by using them in the constant-voltage constant-frequency (CVCF) inverter. Both the static and the dynamic performances are compared for the two control strategies.
In this paper, a novel intermittent reactive-power-variation (RPV) method based on loads’ resonance frequency detection is proposed to reduce the injected reactive power. The RPV method detects the frequency of point of common coupling (PCC) and outputs the minimum reactive variation, which perturbs the frequency of PCC to the frequency thresholds decided by the utility standards when the islanding...
In this paper, a novel reactive-power-variation (RPV) method of distributed generation (DG) inverter is presented. The proposed RPV method detects PCC frequency and outputs the minimum reactive variation which can just deviate the frequency of PCC to the frequency thresholds decided by the utility standards when the islanding condition happens. Compared with the traditional bilateral RPV method, the...
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