The Modular Multilevel Converter (MMC) topology has a wide area of possible applications. Features like redundancy at the module level and fault current limiting capability makes it a robust solution for many power applications. Moreover, this topology is very useful as a test equipment for Power Hardware in-the-Loop simulations, especially as a DC grid simulator. This paper describes a recently commissioned MMC based test bed built with four MMCs capable to operate at up to 5 MW power at 6 to 24 kV, depending upon which system configuration is chosen. Test results for the 12 kV configuration are presented along with a detailed description of all the salient control modules. It is concluded that due to its flexibility, this MVDC laboratory can serve the research and development community in addressing and de-risking a broad range of system integration and technology challenges.
P. Blaszczyk et al., "Modular multilevel converter based test bed for mvdc applications — A case study with a 12 kV, 5 MW setup," 2016 IEEE International Power Electronics and Motion Control Conference (PEMC), Varna, Bulgaria, 2016, pp. 139-145, doi: 10.1109/EPEPEMC.2016.7751988.
KEYWORDS: voltage control, modular multilevel converter based test bed, MMC, MVDC laboratory
power hardware-in-the-loop simulations, DC grid simulators