A novel structure of hybrid active power filter based on voltage-current source converter (VCSC-HAPF)

Abstract

Summary This article establishes a new parallel hybrid active power filter that is elaborated on the joint operation of voltage and current source converters. The idea is in fact combining a voltage source converter (VSC) and a current source converter (CSC) in parallel to form a hybrid scheme that aggregates the benefits of both converters and does not have drawbacks of each one of them. It is conceptually discussed that when low‐frequency components in the reference current are conducted to the CSC and high‐frequency components are devoted to the VSC, then significant reductions can be obtained in the sizes of the hybrid compensator's elements. However, the merit of the proposed scheme is dependent on separation frequency. The idea is then supported by mathematical descriptions and next validated by a series numerical simulation in Matlab/Simulink environment. The performance of the proposed hybrid scheme is successfully examined in a typical distribution network and also compared with a CSC and/or VSC alone.

Criteria for selection of current or voltage source converter in shunt active power filter structure

“…Also, applying great amplitude and low-frequency reference current to CSC and components with low amplitude and high frequency to VSC reduces the DC inductance and capacitance. This issue is shown in Zafari and Jazaeri,(2017a, 2017b).…”

“…At the same project, AC inductance of VSSAPF is more than that of CSSAPF (Zafari and Jazaeri, 2017a, 2017b). Also, according to Bilgin and Ermis (2010), as the inductance is directly related to the square of the number of turns, increase of inductance leads to increase of resistant, especially in air core inductors.…”

A DC-DC converter-based infinite level inverter as DSTATCOM

“…Various topologies of active powers filter have been developed so far. Shunt active power filter based on current‐controlled voltage source‐type PWM converter has proved to be effective even when the load is highly nonlinear . STATCOM or Static Synchronous Compensator—as it is otherwise called—as a solution to these (dynamic compensation of reactive and harmonic currents) power quality issues have gained popularity due to its PF improvement and its capability for current harmonic content compensation .…”

“…Shunt active power filter based on current-controlled voltage sourcetype PWM converter has proved to be effective even when the load is highly nonlinear. 12 STATCOM or Static Synchronous Compensator-as it is otherwise called-as a solution to these (dynamic compensation of reactive and harmonic currents) power quality issues have gained popularity due to its PF improvement and its capability for current harmonic 13 Basically, STATCOM is a voltage source inverter (VSI) connected in shunt to the system at the point of common coupling as shown in Figure 1. The load current consists of three components-active, reactive, and harmonic.…”