A Critical analysis of Non-ideal Quasi Z Source Inverter considering with parasitic resistances
Satyavani.N1, C.Kamal Basha2, N.Visali3
1Satyavani.N *, Research Scholar, Department of Electrical and Electronics Engineering, Jawaharlal Nehru Technological University, Anantapur, India.
2Dr.C.KamalBasha, Professor, Department of Electrical and Electronics Engineering, Madanapalle Institute of Technology and Science, Madanapalle, India.
3Dr.N.Visali, Principal, Department of Electrical and Electronics Engineering, JNTUA College of Engineering, Kalikiri, India.

Manuscript received on November 15, 2019. | Revised Manuscript received on November 23, 2019. | Manuscript published on November 30, 2019. | PP: 2061-2069 | Volume-8 Issue-4, November 2019. | Retrieval Number: D6985118419/2019©BEIESP | DOI: 10.35940/ijrte.D6985.118419

Open Access | Ethics and Policies | Cite  | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This paper describes the perfect small signal mathematical modeling of a non-ideal quasi-Z-source inverter (q-ZSI) by considering the parasitic resistances of capacitors and inductors. In this work, the detailed transfer function model of the system is derived mathematically by using state-space averaging method under continuous conduction mode (CCM). The deduced transfer function model exhibits the non-minimum phase of a system in the capacitor voltage-to-control transfer function due to the presence of Right-Half-Plane (RHP) zeros. The RHP zeros could impose a limitation on the controller design. Therefore, the effect of parasitic resistances of passive elements on system dynamics is analyzed with the frequency response plots such as Bode plot, Root locus and Pole-Zero maps. This analysis helps to frame the guidelines for selecting the pertinent values of passive components and their parasitic resistances. The system stability and dynamic response of the presented small signal model are compared with circuit model and validated in Mat lab/Simulink environment.
Keywords: Non-Ideal Quasi-ZSI, Small-Signal Model, Dynamic Response, Right Half Plane (RHP) Zero, Non- Minimum- Phase.
Scope of the Article: Foundations Dynamics.