COMPARISON OF E-ZSI AND ZSI FOR VOLTAGE SAG AND SWELL MITIGATION
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Feb 6, 2013
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Abstract
Dynamic Voltage Restorer (DVR) is a custom power device used in power distribution networks to protect consumers from sudden sags and swells in grid voltage. A technique based on the Z source inverter and E-Z source inverter for the DVR is proposed in order to enhance the voltage restoration property of the device. The E-impedance source inverter employs a unique impedance network couple with inverter main circuit and rectifier.
By controlling the shoot through duty cycle, the Z source inverter system using MOSFET provide ride through capability during voltage sags, reduces line harmonics, and improves power factor and high reliability. The proposed control algorithm is investigated through computer simulation by using MATLAB.
By controlling the shoot through duty cycle, the Z source inverter system using MOSFET provide ride through capability during voltage sags, reduces line harmonics, and improves power factor and high reliability. The proposed control algorithm is investigated through computer simulation by using MATLAB.