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There has been a growing demand of using multi-function inverters for grid-connected systems applied to nonconventional energy sources, such as solar, wind and so on. In addition to power quality conditioning, the inverter can also be used for bidirectional active power exchange with a three-phase four-wire grid. Therefore, the inverter acts as a multi-function compensator. The functions of the proposed...
This paper presents a division-summation (D-Σ) digital control applied to a three-phase active power filter (APF) with a three-leg inverter. The three-leg inverter shapes the source current sinusoidally by injecting harmonic currents to compensate the load current. The proposed D-Σ digital control approach summarizes the inductor-current variations over one switching cycle to derive control laws directly,...
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