Challenges with power electronics dominated grid
Fig 1. Illustration of lack of inertia in an IBR-dominated grid.
The synchronous generators with large rotating inertia dominate the present power systems. However, with the penetration of non-fossil fuel-based generation, there will be a lot more inverter-based resources in the power grid. The increased penetration of IBRs has resulted in new challenges in power systems like lack of grid inertia, oscillations, low short circuit strength, etc.
The multilevel converters with capacitors (Like MMC, Cascaded Multilevel, etc.) could provide virtual inertia to the grid, especially when connected to a network with low system inertia. The energy stored in the capacitors of the MMC could be used for a transient period to inject power into the grid. However, doing the same may result in the collapse of DC voltage. The control schemes for the operation of the MMC with reduced voltage and then ramping the DC voltage gradually (by taking back the energy from the grid) and the associated challenges are areas of research.
Some of the interesting areas of research in power electronics dominated grids are:
| [1] |
Extracting Inertia from power electronic converters |
| [2] |
Integration of battery storage with grid for frequency control and to provide inertia. |
| [3] |
Power Electronics Interface for Electrolysers. |
I am looking for motivated students with a strong academic background in power electronics and power systems, excellent analytical and problem-solving skills, and a passion for research. Previous research experience is not essential , but a willingness to learn , work hard and contribute is expected. Interested students from reputed academic institutions/industries may please mail me. Email Me.