A Three-Phase Four-Wire Shunt Active Filter Employing a Conventional Three-Leg Converter

Statischer Synchronkonverter mit aktiver D�mpfungseinrichtung zur Energiekonditionierung

“…Die in Bild 6 dokumentierten Meggr6flenverl~iufe wurden im Inselnetzbetrieb ermittelt. [7,8]). Ausgehend yon einer Leerlaufeinstellung werden die Netzinnenwidersdinde am PCC durch parametrische online Identifikationsverfahren gesch~itzt und die Regler parametriert.…”

Dynamic Model and Controller Design for Active Power Filter in Three-Phase Four-Wire System

“…There are many structures to solve these problems [7] such as the three H-bridge topology, the three-leg split-capacitor topology and four-leg topology. In this paper, the three-leg split-capacitor topology with six IGBTs is used because this topology provides a good performance for a harmonic elimination [8] and it uses the lower number of power semiconductor devices [9].…”

“…The fourth part is the DC bus voltage control of APF. The one problem of the three-leg split-capacitor topology is the voltage deviation between the dc capacitors (C dc,1 , C dc,2 ) [9]. For this reason, the design of voltage loop controllers and control strategy are used to keep the balanced voltage across the capacitors (V dc,1 ,V dc,2 ).…”

Electric Machines and Drives

“…Up to now, in many industrial applications, there is a great interest in four-leg inverters for three-phase four-wire applications. Such as power generation, distributed energy systems [1][2][3][4], active power filtering [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], uninterruptible power supplies, special control motors configurations [21][22][23][24][25], military utilities, medical equipment [26][27] and rural electrification based on renewable energy sources [28][29][30][31][32]. This kind of inverter has a special topology because of the existence of the fourth leg; therefore it needs special control algorithm to fulfil the subject of the neutral current circulation which was designed for.…”