| Title |
A Characteristic Improvement for the Parallel Operation of Z-source Inverters |
| Authors |
Yoon-Ho Kim ; Woog-Young Lee ; Kang-Moon Seo |
| Keywords |
Z-source inverter ; Circulating current |
| Abstract |
In this paper, a circulating current reduction approach for the parallel operation of fuelcell systems with Z-source inverters is investigated. The carrier phase shifted SPWM(Sinusoidal Pulse Width Modulation) is used as a modulation method since it has an advantage in reducing output current harmonics, However, when this technique is applied to the parallel operation of Z-source inverters, it additionally produces circulating currents, A coupled circulating current reactor is used to reduce circulating current generated by the parallel operation of Z-source inverters and to reduce output current harmonics, The proposed circulating current reduction approach using coupled circulating current reactors is verified through simulation and experiment. |