A New Strategy for Tie-Line Power Regulation of Hydro-Thermal Interconnected Power System Based on Benefit Analysis

Considering different character between hydroelectric power and thermal power contributed to tie-line, as well as the cost function of the whole interconnected system under electric power market environments, this paper presents a new optimization strategy based on benefit analysis to solve the power regulation on tie-line in hydro-thermal interconnected power system. The units relating to tie-line can be procured by an electrical dissection algorithm in the sending and receiving network and matched with different correlative coefficient, while the other units are also due to be coordinated with diverse regulating power capacity at the same time. The effectiveness of the proposed method is demonstrated on IEEE 57-bus system comprising of hydro and thermal units and compared with some conventional approaches. The experimental results show that the proposed new strategy approaches is able to obtain higher quality solutions efficiently than the conventional approaches.