NTPC eyes 51% stake in ADAG’s power utilities in Delhi. NTPC Limited is India’s largest energy conglomerate. Anil Dhirubhai Ambani Group has two Discoms in Delhi namely BRPL and BYPL. BRPL and BYPL supply electricity to approx 4.4 million customers in Delhi. NTPC will be the first Public Sector Undertaking to buy ADAG’s stake in BSES.