An Approach of Economic Dispatch in the Practical Hydrothermal Power System

This paper presents a practical approach to implement the economic dispatch of the hydrothermal power system in Southern China. The proposed economic dispatch method first computes the initial generation plans for all generator units including hydro units, which are determined according to the equal incremental principal of hydrothermal system. The system loss is approximately considered during the calculation of the initial generation plan. Then, the mathematical model of the optimal dispatch, which considers the network loss and security constraints, is set up based on the initial operation point. The solution algorithm is the modified interior point method. For showing the effectiveness of the proposed approach, the practical hydrothermal power system in southern China is used for demonstration. The results show the feasibility of the proposed dispatch method.