DC grid unipolar and bipolar

DC grid of a Microgrid DC may be unipolar with ground as return path or bipolar with positive and negative terminal. The figure (a) and (b) depicts unipolar and bipolar grid respectively.  If load connected to DC bus is DC such as TV, computers, fluorescent lamps; DC bus requires less power conversion stages. Since power conversion stages are less, losses in conversion also gets reduced.

Source:
Ganesh Patil, M. F. A. R. Satarkar, Gorakshanath Abande «New Scheme for Protection of DC Micro grid» International Journal of Innovative Reseach in Science, Engineering and Technology. Volume 3, Special Issue 3, March 2014.

Dr. Jorge Luis Mírez Tarrillo
Group of Mathematical Modeling and Numerical Simulation (GMMNS).
Universidad Nacional de Ingeniería. Lima, Perú.
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