UPDATE 2-Cemig to exit Brazil's Renova as Brookfield hints at higher bid: sources

SAO PAULO, Sept 29 (Reuters) - Cia Energética de Minas Gerais SA and a subsidiary plan to exit their controlling stake in Brazilian renewable power company Renova Energia SA as Brookfield Asset Management Inc considers raising a takeover bid more than initially expected, two people with direct knowledge of the matter said on Friday.