DocumentCode :
2586292
Title :
The efficiency analysis for three-level grid-connected photovoltaic inverters
Author :
Zhou Hao ; Hu Bing ; Qu Kewang ; Liu Yan ; Tong Chaonan
Author_Institution :
Sch. of Autom. & Electron. Eng., Univ. of Sci. & Technol. Beijing, Beijing, China
fYear :
2012
fDate :
28-31 May 2012
Firstpage :
1086
Lastpage :
1090
Abstract :
The grid-connected photovoltaic (PV) systems are an important part of renewable energy sources and their effect is getting more and more extensive. To improve the efficiency, small volume, and low prices of the PV systems, many kinds of new inverter topologies have been proposed to avoid using a grid isolation transformer, and the traditional three-level neutral-point-clamped (NPC) topology structure and T topology structure are presented and in-depth analyzed in this paper. Relative to conventional NPC topology, the T topology with fewer switching devices than before when producing the same number of output levels, which simplifies circuit and saves costs. Efficiency analysis results show that T topology have high efficiency, lower leakage current and EMI.
Keywords :
PWM invertors; electromagnetic interference; leakage currents; photovoltaic power systems; power grids; EMI; T topology structure; efficiency analysis; grid isolation transformer; grid-connected PV systems; inverter topology; leakage current; renewable energy sources; switching device; three-level NPC topology structure; three-level grid-connected photovoltaic inverters; three-level neutral-point-clamped topology structure; Clamps; Educational institutions; Insulated gate bipolar transistors; Inverters; Switches; Switching frequency; Topology; Neutral-Point-Clamped (NPC); Photovoltaic (PV); Topology; total harmonic distortion (THD);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Electronics (ISIE), 2012 IEEE International Symposium on
Conference_Location :
Hangzhou
ISSN :
2163-5137
Print_ISBN :
978-1-4673-0159-6
Electronic_ISBN :
2163-5137
Type :
conf
DOI :
10.1109/ISIE.2012.6237239
Filename :
6237239
Link To Document :
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