| Title |
Circulating Current Control of a Modular Multi-level Converter(MMC)-HVDC System based on VPI(Vector-PI) Control for DC Power Network |
| Authors |
Si-Hwan Kim ; June-Sun Lee ; Young-Pyo Cho ; Rae-Young Kim |
| DOI |
https://doi.org/10.6113/TKPE/2017.22.3.263 |
| Keywords |
MMC(Modular Multilevel Converter) ; HVDC(High Voltage Direct Current) ; Circulating current control ; VPI(Vector PI) |
| Abstract |
This paper proposes a novel circulating current control method for an MMC-HVDC system based on Vector PI control. The method can suppress second-order harmonics of the circulating currents under balanced and unbalanced grid conditions. The proposed method is robust to grid frequency variation. The effectiveness of the proposed method is verified through frequency response and time domain simulation. |