Exhibit 12.1

CERTIFICATION PURSUANT TO RULES 13a-14(a) AND 15d-14(a) UNDER THE SECURITIES AND EXCHANGEACT OF 1934, AS AMENDED

I, Andre Dorf, certify that:

1.

   I have reviewed this annual report on Form 20-F of CPFL Energia S.A.;2.

   Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state amaterial fact necessary to make the statements made, in light of the circumstances under which suchstatements were made, not misleading with respect to the period covered by this report;3.

   Based on my knowledge, the financial statements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operations and cash flows of the company asof, and for, the periods presented in this report;4.

   The company s other certifying officer(s) and I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control overfinancial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:a.

   Designed such disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that material information relating to thecompany, including its consolidated subsidiaries, is made known to us by others within thoseentities, particularly during the period in which this report is being prepared;b.

   Designed such internal control over financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation of financial statements for externalpurposes in accordance with generally accepted accounting principles;c.

   Evaluated the effectiveness of the company s disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosure controls and procedures, as ofthe end of the period covered by this report based on such evaluation; andd.

   Disclosed in this report any change in the company s internal control over financial reporting thatoccurred during the period covered by the annual report that has materially affected, or isreasonably likely to materially affect, the company s internal control over financial reporting; and5.

   The company s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the company s auditors and the audit committee of the company s board ofdirectors (or persons performing the equivalent functions):a.

   All significant deficiencies and material weaknesses in the design or operation of internal controlover financial reporting which are reasonably likely to adversely affect the company s ability torecord, process, summarize and report financial information; andb.

   Any fraud, whether or not material, that involves management or other employees who have asignificant role in the company s internal control over financial reporting.




Date: April 23, 2018

/s/Andre DorfAndre DorfChief Executive Officer