The Hydrothermal Optimal Load Flow, A Practical Formulation and Solution Techniques Using Newton's Approach

• Published in: IEEE transactions on power systems Vol. 1; no. 3; pp. 157 - 166
• Main Authors: El-Hawary, M. E., Tsang, D. H.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 1986; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Cost function; Electrical engineering. Electrical power engineering; Electrical power engineering; Exact sciences and technology; Large-scale systems; Load flow; Newton method; Operation. Load control. Reliability; Power generation; Power generation economics; Power networks and lines; Power system dynamics; Power system economics; Power system security; System testing; Operation study; Electrical network; Optimal control; Hydro thermal generation; Power system load; Iterative method; Newton method; Calculating method; Load flow
• DOI: 10.1109/TPWRS.1986.4334975
• ISSN: 0885-8950

This paper is concerned with the problem of optimal power flow in a hydro-thermal electric power system (HTOPF). The formulation and optimality conditions for systems with fixed head hydro-plants subject to an energy limited constraint are presented. The solution to obtain the optimal operational strategy is implemented using Newton's method. Due to the large scale nature of the problem, special sparsity oriented and structural property enhancements are explored and four versions for algorithmic implementation are detailed in the paper. Special attention is paid to finding realistic initial guess estimates for the algorithms reported. Results of computational experience with six standard test systems are reported in the paper.