Exhibit 23 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement Nos. 333-33284 and 333-00973 and Post-Effective Amendment No. 1 to Registration Statement No. 333-100623 of Public Service Company of Oklahoma on Form S-3 of our reports dated February 21, 2003, appearing in and incorporated by reference in this Annual Report on Form 10-K of Public Service Company of Oklahoma for the year ended December 31, 2002. /s/ Deloitte & Touche LLP Deloitte & Touche LLP Columbus, Ohio March 20, 2003