AES, CPFL among interested in buying Brazil's Celg, source says

SAO PAULO, Feb 5 (Reuters) - U.S. power utility AES Corp as well as Brazilian rivals CPFL Energia SA and Equatorial Energia SA are among interested parties that have shown preliminary interest in buying state-controlled power distributor Centrais Elétricas de Goiás SA, a source briefed on the plan said.