Abstract
Multi-terminal direct current (MTDC) grids are gaining the interest of many researchers because of their unique features that improve the transmission network functionality and reliability. Unlike two level and three level voltage source converters (VSC), modular multi-level converters (MMC) are suitable for the application of MTDC grids because of their generous advantages such as the elimination of DC link capacitor, the improved quality of the output power and the lower footprint. However, simulation of MMC based MTDC grids is a real challenge because of the huge computational burden due to the high number of submodules. This paper proposed a modeling approach for a four terminal MTDC grid which is based on average MMC models with 401 voltage levels. The control system structure which controls the power through the MTDC grid and the MMCs at each terminal is presented. The whole system is tested and simulated using PSCAD/EMTDC under different operating conditions to verify the validity and evaluate the performance of the proposed modelling approach.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
