Graphical Representation of the Instantaneous Compensation Power Flow for Single-Phase Active Power Filters

Abstract

-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.

Versatile Shunt Hybrid Power Filter to Simultaneously Compensate Harmonic Currents and Reactive Power

“…However, they have many problems, such as low dynamic performance and resonance problems, and their filtering characteristics can be easily affected by system parameters [1]. Active power filters (APFs) have been developed to overcome the disadvantages of LC passive filters [2][3][4][5]. APFs can offer flexible control functionalities, but their high initial and operational costs are the main barriers that limit their application in practice.…”