UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2018 Commission File Number 1-32297 CPFL ENERGIA S.A. (Exact name of registrant as specified in its charter) (Translation of registrant's name into English) (Jurisdiction of incorporation or organization) CPFL ENERGY INCORPORATED The Federative Republic of Brazil Rodovia Engenheiro Miguel Noel Nascentes B ...