August 10, 2012. The Planning Commission came in support of Delhi government's demand for islanding the capital from the Northern Grid on the lines of south Mumbai. The city government had approached the Centre to island Delhi shortly after two consecutive failures in the grid late last month that led to a blackout in the city for several hours. In case the grid trips, islanding facility will ensure that dedicated power plants immediately supply power to the capital through dedicated corridors located outside the grid.