| Title |
DC Bus Voltage Regulation With Six-Step Operation in Maritime DC Power System |
| Authors |
Jonghun Yun ; Young-Kwang Son ; Seung-Ki Sul |
| DOI |
10.6113/TKPE.2021.26.4.263 |
| Keywords |
Six-step operation; DC grid; Electric propulsion; Variable engine speed drive; PMG (Permanent Magnet Generator) |
| Abstract |
Active AC/DC converters with PWM operation are utilized to regulate rectified DC bus voltage of a permanent magnet synchronous generator in the maritime DC power system. A DC bus voltage regulation strategy that exploits the six-step operation is proposed in this study. Compared with that of the PWM operation, switching loss of the converter can be significantly reduced under the six-step operation. Moreover, conduction loss can also be reduced due to the high modulation index and reduced flux-weakening current of the six-step operation. A controller is used for the proposed DC bus voltage regulation strategy to verify its validity with the simulation and experimental setup. The simulation and the experimental test results showed that the converter loss reduces to a maximum of 70% and 19%, respectively. |