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http://dx.doi.org/10.6113/TKPE.2014.19.3.201

DC-link Voltage Control of Grid Connected PV System using Quasi Z-Source Inverter  

Park, Jong-Hyoung (Power Grid Integration Team, Power &Industrial Systems R&D Center, Hyosung Co., LTD.)
Kim, Heung-Geun (Dept. of Electrical Engineering, Kyungpook Nat'l Univ.)
Nho, Eui-Cheol (Dept. of Electrical Engineering, Pukyong Nat'l Univ.)
Chun, Tae-Won (Dept. of Electrical Engineering, University of Ulsan)
Cha, Honnyong (School of Energy Engineering, Kyungpook Nat'l Univ.)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.19, no.3, 2014 , pp. 201-210 More about this Journal
Abstract
In this paper, dc-link voltage control of a grid-connected QZSI is presented. Since the input current of the ZSI is discontinuous, a capacity with relatively large capacitance should be connected to the output of the PV array in order to reduce the current ripple. Due to the presence of the impedance network inductor in series with the PV array, the QZSI can achieve continuous input current flow. Several dc-link voltage control methods are compared and the method for power quality improvement is also presented. The performance of the proposed method is verified through both simulation and experimental results.
Keywords
grid connected quasi z-source inverter(QZSI) system; photovoltaic system; shoot-through; maximum power point tracking(MPPT); impedance network; LCL filter; resonanace control; harmonics compensation;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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