Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter

Jong-Hyoung Park; Heung-Geun Kim; Eui-Cheol Nho; Tae-Won Chun

Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter

Vol. 10, No. 1, pp. 79-84, Dec. 2009

10.6113/JPE.2010.10.1.79

MPPT

P&O method

Photo-voltaic system

Quasi-Z-source inverter

Shoot through stage

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Abstract

This paper presents a grid connected photo-voltaic system using a quasi-Z-source inverter (QZSI) for power stage reduction. The power stage can be reduced because of an additional shoot-through stage which is a characteristic of QZSI. Therefore, by utilizing a QZSI the system’s efficiency can be increased. In this paper, for applying a QZSI to a PV system, control methods such as maximum power point tracking (MPPT), point of common coupling (PCC) current control and PWM are studied and verified through simulation and experiment. In order to explain the above controllers, the characteristics of a QZSI are first analyzed. Then the MPPT control technique with a modified P&O method, the PCC current control for the regulation of the dc-link capacitor voltage and the PWM methods for the proposed system are explained. The feasibility of the proposed algorithm is verified through simulation and experiment with a 3kW system.

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Cite this article

[IEEE Style]

J. Park, H. Kim, E. Nho, T. Chun, "Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter," Journal of Power Electronics, vol. 10, no. 1, pp. 79-84, 2010. DOI: 10.6113/JPE.2010.10.1.79.

[ACM Style]

Jong-Hyoung Park, Heung-Geun Kim, Eui-Cheol Nho, and Tae-Won Chun. 2010. Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter. Journal of Power Electronics, 10, 1, (2010), 79-84. DOI: 10.6113/JPE.2010.10.1.79.