セミオープンループ制御による単相連系インバータの外乱抑圧特性向上法

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  • Improvement Method of Disturbance Suppression for Single-Phase Grid-Tied Inverter Using Semi-Open-Loop Control

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<p>This paper presents a semi-open-loop control for a single-phase grid-tied inverter with voltage control. To improve the output current distortion, a disturbance observer, including an inductance value greater than the grid-tied inductance, is applied to semi-open-loop control. Using the proposed method, the inverter output current total harmonic distortion (THD) is reduced by 76% with the grid-connected operation compared to the open-loop control. Moreover, the THD of the inverter output voltage is reduced by up to 57% with the stand-alone operation for a diode rectifier load.</p>

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