Effect of Stability Analysis Using Electromagnetic Interference in Grid-Connected Z-source Inverters

Abstract

The paper focuses on using Z-Source inverter (ZSI) as an alternate for voltage source inverters (VSI) in order to avert the instability in the power distribution system. <span style="mso-fareast-font-family:Calibri;mso-ansi-language: EN-IN;mso-fareast-language:EN-IN;mso-bidi-font-weight:bold">An inner inverter-output-current loop with high bandwidth is also designed to get better disturbance rejection capability. This paper elaborates on comparative performance of traditional and Z-Source inverter(ZSI) apart from analysing the selection of weighting functions, inner inverter-output-current loop design, and system disturbance rejection capability. In this control strategy, the inverter is controlled by means of robust <i>H∞</i> controller along with stability is analyzed<span style="mso-fareast-font-family: Calibri;mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-font-weight: bold"> The proposed control method is tested with simulation results obtained using Matlab/Simulink.

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