By Sergio Goncalves LISBON (Reuters) – Portugal’s largest utility EDP posted on Thursday a nine-month net profit little changed from a year ago as strong income growth in its wind and solar unit was offset by a sharp drop in hydroelectric generation in Iberia and high taxes. EDP-Energias de Portugal said in a statement its consolidated net income edged 1% higher to 518 million euros ($517 million) between January and September. The bottom line was hampered by a severe drought in Iberia that increased EDP’s production costs, which, combined with an extraordinary tax on the energy sector in Port…