NDLI: Class of high step-up switched Z-source inverters: steady state analysis and objective function

Content Provider	IET Digital Library
Author	Nozadian, Mohsen Hasan Babayi Babaei, Ebrahim Hosseini, Seyed Hossein
Abstract	In this study, high step-up switched Z-source inverters (HSZSIs) with two main groups namely types I and II are proposed. Each of these groups includes several proposed structures. Owing to the features of the proposed structures such as high boost factor ( β ) , continuous input current, and low voltage stress; they can be used in different applications such as renewable power systems. By using the same numbers of the passive elements in comparison with a conventional Z-source inverter (ZSI), quasi-ZSI, and series ZSI (SZSI), the proposed structures produce a higher boost factor. A new objective function is defined so that all compared parameters can be investigated with each other simultaneously. The power losses and efficiency analyses for all of the proposed structures are done and compared with the conventional structures. It is shown that for P out ≃ 200 W , the measured efficiencies for basic HSZSI type I, quasi-HSZSI type I, basic HSZSI type II and quasi-HSZSI type II are 91, 85, 96, and 92%, respectively. In addition, the total harmonic distortion calculation, dynamic performance and designing a closed-loop control method for the proposed structures are shown. Finally, the experimental results are indicated for a 500 W prototype.
Starting Page	1329
Ending Page	1340
Page Count	12
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 6, May (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5831
Journal	IET Power Electronics
Publisher Date	2019-01-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Basic HSZSI Type II Boost Factor Closed Loop System Closed-loop Control Method Continuous Input Current Control of Electric Power System Current Control Efficiency 85 Percent Efficiency 91 Percent Efficiency 92 Percent Efficiency 96 Percent Electric Current Control Harmonic Distortion High Step-up Switched Z-source Inverter Invertors Objective Function Power 200 W Power 500 W Quasi-HSZSI Type II Renewable Power System Series ZSI Steady State Analysis Total Harmonic Distortion Calculation Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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