DocumentCode :
2857173
Title :
Design of LCC resonant converter for renewable energy systems with wide-range input voltage
Author :
Cho, K.A. ; Ahn, S.H. ; Ok, S.B. ; Ryoo, H.J. ; Jang, S.R. ; Rim, G.H.
Author_Institution :
Dept. of Energy Conversion, Univ. of Sci. & Technol., Changwon, South Korea
Volume :
2
fYear :
2012
fDate :
2-5 June 2012
Firstpage :
1221
Lastpage :
1228
Abstract :
This paper deals with the design of a 21 kW series-parallel resonant converter, that is, LCC resonant converter that can be effectively used for intermediate power conversion from renewable energy sources to a battery energy storage system. The developed LCC resonant converter was made of a high-frequency transformer and a relatively high parallel capacitance for voltage boosting in order to cover a wide range of input voltage (200 - 400 V) with high-efficiency. Furthermore, the optimized design of resonant tank parameters described in this paper helped reduce or make negligible the turn-off loss of insulated gate bipolar transistors by increasing the lossless snubber capacitance. In this paper, the detailed design of the proposed converter, including the selection of the snubber capacitor and the determination of transformer turns ratio on the basis of the converter specifications, is described along with operational mode analysis and PSpice simulation. In addition, a simple structure of a controller for a battery charging application that requires both constant current and constant voltage control is described. A gate driving method for zero voltage switching was introduced to compensate the difference of snubber capacitor discharging time. Finally, the developed LCC resonant converter was tested with a resistive load, and the results showed a maximum efficiency higher than 90% in the input voltage range of 200-400 V. A long duration operation test was conducted to verify the reliability and robustness of the designed converter.
Keywords :
DC-DC power convertors; electric current control; energy storage; high-frequency transformers; insulated gate bipolar transistors; renewable energy sources; resonant power convertors; snubbers; voltage control; zero voltage switching; LCC resonant converter; PSpice simulation; battery charging; battery energy storage system; constant current control; constant voltage control; gate driving method; high frequency transformer; insulated gate bipolar transistors; intermediate power conversion; lossless snubber capacitance; operational mode analysis; power 21 kW; renewable energy sources; renewable energy systems; resonant tank parameters; snubber capacitor discharging time; transformer turns ratio; turn off loss; voltage 200 V to 400 V; voltage boosting; wide range input voltage; zero voltage switching; Batteries; Capacitance; Capacitors; Insulated gate bipolar transistors; Snubbers; Switches; Voltage control; DC-DC converter; Renewable energy system;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power Electronics and Motion Control Conference (IPEMC), 2012 7th International
Conference_Location :
Harbin
Print_ISBN :
978-1-4577-2085-7
Type :
conf
DOI :
10.1109/IPEMC.2012.6259015
Filename :
6259015
Link To Document :
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