Abstract
The modular multilevel converter (MMC) has become one of the most promising converter technologies for medium/high-power applications, specifically for high-voltage direct current (HVDC) transmission systems. One of the technical challenges associated with the operation and control of the MMC-based system is to precharge the submodule (SM) capacitors to their nominal voltages during the startup process. In this paper, considering various SM circuits, a general precharging strategy is proposed for the MMC-based systems under ac-and dc-side startup conditions. The proposed startup method does not require any additional feedback control loop, extra measurements, and/or auxiliary power supplies. Based on the developed startup method, the charging current is controllable by adjusting the changing rate of the number of blocked and bypassed SM capacitors. Performance of the proposed strategy for various MMCs is evaluated based on time-domain simulation studies in the PSCAD/EMTDC software environment.
| Original language | English (US) |
|---|---|
| Title of host publication | 2016 IEEE Applied Power Electronics Conference and Exposition, APEC 2016 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1528-1533 |
| Number of pages | 6 |
| Volume | 2016-May |
| ISBN (Electronic) | 9781467383936 |
| DOIs | |
| State | Published - May 10 2016 |
| Event | 31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 - Long Beach, United States Duration: Mar 20 2016 → Mar 24 2016 |
Other
| Other | 31st Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2016 |
|---|---|
| Country | United States |
| City | Long Beach |
| Period | 3/20/16 → 3/24/16 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering