Parallel operation of trans-Z-source inverter

Parallel operation of trans-Z-source inverter,10.1109/ICPE.2011.5944665,Dongsul Shin,Honnyong Cha,Jong-Pil Lee,Dong-Wook Yoo,Fang Z. Peng,Heung-Geun K

Parallel operation of trans-Z-source inverter  
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Recently, there is a strong demand for high power conversion system in power electronics area especially in photovoltaic (PV) power conditioning system (PCS), wind power generation, and fuel cell power generation system. However, there is a limit in increasing power level mainly due to the limitations in switching device's voltage and current rating. One way to solve this problem is to connect power converters in parallel. Parallel operation of inverter has many advantages such as modularity, ease of maintenance, (n+1) redundancy, high reliability, etc. This paper presents parallel operation of voltage-fed-trans-Z-source inverter. A 2.6 kW prototype inverter is built and tested to verify performances of the proposed inverter.
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