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In this paper, a wind energy conversion system based on a cascaded H-bridge multilevel inverter (CHBMLI) topology has been proposed to be used for the grid interface of large split-winding alternators (SWAs). A new method has been suggested for the generation of reference currents for the voltage source inverter (VSI) depending upon the available wind power. The CHBMLI has been used as a VSI and operated...
This paper analyzes the two commonly used current control methods for high power, low switching frequency applications involving half bridge inverter. First, the problem of voltage balancing of two DC link capacitors in the half bridge inverter has been discussed. The two current control methods used for the comparison are hysteresis current control and ramp comparison current control methods. It...
This paper presents the development of single phase AC/DC/AC converter using three-leg inverter. A uniform fixed switching frequency method of current control for both AC/DC and DC/AC converter stages has been proposed. A multiple control loop is used to control the input AC current and DC link voltages of the AC/DC converter and a cascaded H-bridge multilevel inverter (CHBMLI) is used to obtain the...
This paper proposes a generalized hysteresis current controlled three level voltage source inverter (VSI) based single phase shunt active power filter (SAPF). The three level inverter topologies considered in this paper are H-bridge and diode clamped inverters. A generalized hysteresis current control with multiband hysteresis modulation has been used to control the voltage source inverters in the...
In this paper the control of 3-level shunt active power filter is proposed using frequency selective proportional plus multiple resonant controllers. The voltage source converter (VSC) is operated using ramp-comparison current control method. The method provides fixed switching frequency operation, and unipolar modulation of a control function yields three-level PWM output. The resonant controllers...
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