Dong-chun Wu

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Unity power factor can be obtained if phase lock loop (PLL) with droop characteristic is used for grid-connected inverter. However, the non-detection zones (NDZ) of the droop PLL is too wide to satisfy some standard. In order to decrease the NDZ, an improved PLL is proposed, which introduces phase disturbance into the control strategy. The operating(More)
Using grid voltage feed-forward control, the current-loop parameters and filter inductor affect the power factor of grid-connected inverter. Based on droop phase-locked loop (PLL) a novel control strategy is proposed. The phase difference between the grid current and grid voltage is detected and is used to calculate the output frequency of PLL. Unity power(More)
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