Transmission-line theory based distributed Z-source networks for power conversion

Abstract

Power converters are switching faster and faster nowadays, making the parasitic and distributed inductance and capacitance along with passive components potentially a troublesome hardware design issue. Applications with integrated or distributed LC networks are intentionally utilizing the passive parasites. Moreover, less component count and higher power density make them very promising. This paper explores the conceptual study of power conversion applications incorporating distributed LC networks, or named distributed Z-source networks (DZSN), based on the transmission line theory. From the unique feature of periodicity exhibited by the transmission line impedancefrequency curve, switching harmonics can possibly be transformed by the DZSNs in desired manners, and thus power conversion purpose is achieved. Several new topologies are derived and corresponding control methods are proposed accordingly. A universal prototype was built and tested. Experimental results are presented to verify the performances.

Impedance-Source Networks for Electric Power Conversion Part I: A Topological Review

“…All diverse power converter topologies with impedancesource networks are mainly derived from the Z-source network by modifying the original impedance network, or by rearranging the connections of inductors and capacitors [94]- [137]. Each Zsource network topology yields unique features for different or particular application needs.…”

“…10) Distributed Z-Source: Distributed impedance networks such as transmission lines and hybrid LC components can be used for a Z-source network [135]- [137] as shown in Fig. 25.…”

Impedance-Source Networks for Electric Power Conversion Part II: Review of Control and Modulation Techniques

“…I MPEDANCE-source networks provide an efficient means of power conversion from/to a source or load in a wide spectrum of electric power conversion (dc-dc, dc-ac, ac-dc, ac-ac) applications [2], [3]. Since the publication of the first impedancesource network called a "Z-Source Network" in 2002, many modified and new impedance-network topologies have been reported in the literature with both buck and boost capabilities, e.g., quasi-Z-source [4]- [6], Γ-Z-source [7]- [9], T-source [10], [11], Trans Z-source [12]- [14], TZ-source [15], LCCT Z-source [16], [17], TSTS Z-source [18], [19], intermediate-transformerisolated Z-source [20], distributed Z-source [21]- [23], switched inductor/capacitor [24]- [28], capacitor diode assisted [29], [30], embedded Z-source [31]- [33], semi Z-source/quasi Z-source [34], [35], enhanced/improved Z-source [36]- [39], and finally Y. P. Siwakoti and G. E. Town are with the Department of Engineering, Macquarie University, NSW 2109, Australia (e-mail: yam.siwakoti@mq.edu.au; graham.town@mq.edu.au).…”

Impedance networks and its Application in Power for Electric Traction Systems

“…15). 10) Topología Z fuente distribuida, las redes de impedancia distribuida tales como líneas de transmisión y componentes LC híbridos se pueden utilizar para configurar una red Z-fuente [33]- [34]. La utilización de convertidores (Fig.…”