The Optimal Model And Method Of Thermal Power Plant Water Pumps Operation

The water pumps are the important auxiliary equipments in thermal power plant, its operation status directly influences the power plant producing. Optimized water pump system’s operation can not only reduces thermal power plant’s power consumption rate effectively but also improve producing efficiency. Therefore, researching on the water pump systems operation optimization is of very important theory and practical significance.Feed-water pump and circulating-water pump are major installations in the thermal power plant’s water pump system. According to the operating characteristics of water pump, the mix integer linear programming optimization model of thermal power plant water pump system is established in this paper. It considers parallel and series operation and the object is to minimize the power of pumps, the constraints contain the demand of system flow or head, speed size, flow size, power size and pipeline performance. Because of the complexity of this model, this paper makes the pumps operating performance curve piece-wise linear at first, then introduces a new0-1variable which can characterize the choice of a different Q-P curve at a different speed, the optimization variable speed n can be transformed into the intersection of Q-H curve and axis H at the same time. The model has been converted to mixed-integer linear programming problem.The circulating-water pump system mix integer linear programming model is established based on the feed-water pump model. Because this system contains variable-speed pumps and constant-speed pumps, a0-1variable is introduced in the object, which controls the work status of constant-speed pump.In the end of this paper, the model was simulated using actual operation datum of the thermal power plant and commercial modeling tools. By comparing with the scheme before optimizing, the results of case can verify the effectiveness of this method.