Jubril, Abimbola & Adediji, A. & Olaniyan, O.. (2012). Solving the Combined Heat and Power Dispatch Problem: A Semi-definite Programming Approach. Electric Power Components and Systems - ELECTR POWER COMPON SYST. 40. 1362-1376. 10.1080/15325008.2012.694972. This article presents a new solution using the semi-definite programming approach to solve the combined heat and power economic dispatch problem. The proposed method involves reformulating the combined heat and power dispatch problem into a semi-definite programming form. The resulting semi-definite programming problem is solved using the primal-dual solver. The effectiveness of the proposed method is illustrated through some test problems, and the results are compared with those in literature.