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In this paper, when voltage sag of the normal grid voltage occurs, detecting the peak voltage for fast mode transfer method is proposed. The conventional detector of sag voltage used in synchronous d-q frame by Digital Phase-Locked-Loop(DPLL). However using this method, the delay time is longer. Despite the sag occurrence of grid voltage, it cannot reflect a sudden change of the grid voltage in the...
The paper proposes a control algorithm for an integrated inverter system to maintain desired output voltage waveform when Power Quality disturbances occur. Most reason for these events are an instantaneous voltage sag and a momentary interruption. To solve these problem, when the power source voltage is out of normal range or a momentary power outage causes the problem, power is supplied to load through...
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