For the high/medium voltage-based applications, modular multilevel converter (MMC) is the most promising technology among all other due to its better harmonic performance, higher efficiency and its modular structure. The conventional structure of three phase MMC is shown in Fig. 1. The converter consists of three phase leg with two arms in each phase. Each arm is incorporated with N number of sub-modules (SMs) connected in series with an arm inductor. To solve the above problem, a new converter configuration is derived from MMC to integrate one or more dc source/load with one or more ac source/load in the mixed dc/ac grid. The proposed converter topologies eliminated the needs of extra converter required for the integrations. Also, these converters can integrate the dc/ac grids at different voltage levels. This is due to presence of SMs which leads to the distributed capacitors voltages.
Type of IP
Faculty
Category of Patent
It’s a cost-effective solution due to the reduced additional converters required for interconnecting multiple grids at different voltage levels.
- The multiple configurations proposed allows the interconnection of various dc and ac port using modular multilevel converter.
- The proposed invention is suitable to integrate different grids with various voltage levels.
- The proposed invention allows the power exchange within multiple grids.
3
Tested and validated
power industries, power electronics, distribution and transmission industries
Interconnection of distribution and transmission grid at different voltage levels.