Research on TZSI Control Method

Abstract:

In transformer-Z-source inverters (TZSI), the impedance networks consist of a transformer and one capacitor. While maintaining the main features of traditional Z-source network, the new networks exhibit some unique advantages, such as the increased voltage gain and reduced voltage stress in the voltage-fed TZSI, when the turns ratio of the transformer windings is over 1. This paper contributes to the ac small signal modeling and analysis of TZSI in continuous conduction mode. The ac small signal model considers the dynamics introduced by network uniquely contained in TZSI. And a double loop control method which is impedance source network output dc voltage and current loop has been proposed to realize the control of TZSI. Results of simulations and experiments are used to validate the control method and show that this method is correct and feasible.

• Periodical: Advanced Materials Research (Volume 773)
• Pages: 51-57
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.773.51
• Online since: September 2013
• Authors: Lei Pan, He Xu Sun, Lan Fang Fu, Bin Liu, Ran Gao, Bei Bei Wang
• Keywords: AC Small Signal Model, Double Loop Control, Impedance Source Network, TZSI

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