Author(s): Yongqiang Wang; Deyu Zhong; Baosheng Wu
Linked Author(s):
Keywords: Cascaded reservoirs; Multi-agent group decision-making; Flood control; Power generation; Navigation operation
Abstract: Reservoir navigation is restricted by the reservoir operation of flood control and power generation. In season, in order to protect the safety of the dam and downstream, water levels of cascaded reservoirs need to be decreased to the flood control level, which reduced the generated energy and navigable capacity. In dry season, unsteady flow from cascaded reservoirs by the peaking operation frequently change with the power grid load changes, which results in the deterioration of navigable flow condition reduction of navigable capacities. Therefore, the navigation of cascaded reservoirs is viewed as a multi-agent group decision-making problem. To solve this problem, quantitative numerical simulation of multi-objectives optimization model under different conditions are executed to obtain non-inferior set by multi-objectives differential evolution algorithm. Then a grey correlation model of multi-agent group decision-making for reservoirs operation is presented to give the grey correlation between these objectives and the preference structures of decision-makers to different non inferior solution. According evaluate the satisfaction of these preference structures of decision-makers, the solution with the highest satisfaction is selected as the optimal equilibrium solution based on grey system theory. To verify the feasibility and effectiveness, the proposed approach is employed in the cascaded reservoirs in lower Jinsha River. The simulation results show that the obtained solution can meet various limited constraints and balance the relationship among the reservoirs navigation, flood control and power generation. Furthermore, operation rules of cascaded reservoirs can be generalized by analyzing the variation law of discharged flow and water level over period in the optimal equilibrium solution.
Year: 2015