| Title |
A Simplified Voltage Balancing Method Applied to Multi-level H-bridge Converter for Solid State Transformer |
| Authors |
Dong-Keun Jeong ; Ho-Sung Kim ; Ju-Won Baek ; Jin-Tae Cho ; Hee-Je Kim |
| DOI |
https://doi.org/10.6113/TKPE/2017.22.2.95 |
| Keywords |
SST(Solid State Transformer) ; Voltage balancing method ; H-bridge converter ; Multi-level converter |
| Abstract |
A simple and practical voltage balance method for a solid-state transformer (SST) is proposed to reduce the voltage difference of cascaded H-bridge converters. The tolerance device components in SST cause the imbalance problem of DC-link voltage in the H-bridge converter. The Max/Min algorithms of voltage balance controller are merged in the controller of an AC/DC rectifier to reduce the voltage difference. The DC-link voltage through each H-bridge converter can be balanced with the proposed control methods. The design and performance of the proposed SST are verified by experimental results using a 30 kW prototype. |