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정영국 대한전기학회 2013 Journal of Electrical Engineering & Technology Vol.8 No.6
The conventional graphical representation of the instantaneous compensation power flow for single-phase active power filters(APFs) simply represents the active power flow and the reactive power flow which flowing between the power source and the active filter / the load. But, this method does not provide the information about the rectification mode and the compensation mode of APFs,especially, the loss for each mode was not considered at all. This is very important to understand the compensation operation characteristics of APFs. Therefore, this paper proposes the graphical representation of the instantaneous compensation power flow for single-phase APFs considering the instantaneous rectification mode and the instantaneous inversion mode. Three cases are verified in this paper - without compensation, with compensation of the active power ‘p’ and the fundamental reactive power ‘q’, and with compensation of only the distorted power ‘h’. To ensure the validity of the proposed approach, PSIM simulation is achieved. As a result, we could confirm that the proposed approach was easy to explain the instantaneous compensation power flow considering the instantaneous rectification mode and the instantaneous inversion mode of APFs, also, Total Harmonic Distortion(THD)/Power Factor (P.F) and Fast Fourier Transform(FFT) analysis were compared for each case.
3상 3선 전력 시스템에 적용된 순시전력이론의 α-β전력 및 전류성분에 관한 실험적 고찰
정영국 한국조명.전기설비학회 2022 조명·전기설비학회논문지 Vol.36 No.3
This study experimentally derives various power and current components at coordinates from instantaneous power theory applied to voltage-type nonlinear loads. An induction motor drive system is used as a voltage-type nonlinear load, and a simulated active power filter system based on DSP(Digital Signal Processor) is manufactured to verify its validity experimentally. Each power and current component of an induction motor driving 3-phase 3-wire power system is calculated with DSP to implement a simulated active power filter, and from this result, a flow of instantaneous compensation power could be experimentally verified. When various current and power components derived from instantaneous power theory are used as control reference signals of a simulated active power filter, the effect on a voltage-type nonlinear load current is experimentally investigated.