Design And Implementation Of Secondary Water Supply Control System Based On Energy Efficiency Optimization

In recent years,with the rapid development of the technical level of high-rise buildings,people’s pursuit of the quality of life has also been continuously improved.The quality of the secondary water supply plays an important role in people’s lives,but the water supply system still has improper scheduling options for the centrifugal pumps,resulting in low efficiency of the centrifugal pump system operation,wasting electrical energy,and affecting the service life of centrifugal pump.Therefore,this thesis starts from the perspective of energy consumption and life optimization,and conducts in-depth research on the operation energy consumption and life control strategy of the entire system to achieve the effect of low energy consumption and long life.First,in order to establish the energy consumption model of the secondary water supply parallel pump set system,the characteristics of the head,power,efficiency and tube resistance of the centrifugal pump of the power supply system of the water supply system are introduced.Then,according to the relationship between the head,power and flow of the parallel operation of the centrifugal pump in the secondary water supply system,the curve was compared and fitted by the mathematical analysis method,and on this basis,the energy consumption status of the secondary water supply parallel pump set system in different operating modes is analyzed graphically.Then,according to the characteristics of the centrifugal pump,the energy consumption model of the same type of centrifugal pump set and different types of centrifugal pump sets in parallel operation in the secondary water supply parallel pump set system is established.Finally,under the condition of satisfying the user’s hydraulic demand(head flow demand),the optimal efficiency and the limiting conditions of the pump unit during the operation of the secondary water supply centrifugal pump group system are solved by using Lagrange number multiplication,and this conclusion is taken as basis,from the perspective of low energy consumption and high life,the energy consumption models of different types of pumps in parallel operation are established.An energy consumption scheduling optimization control strategy with life constraints is proposed.The improved differential evolution algorithm is used to optimize the model solve the problem,and at the same time build a test simulation platform based on the MATLAB platform,perform the DE algorithm energy consumption optimization simulation test on the normal flow and head demand of the water supply of the building in life,and verify the feasibility of the application of the differential evolution algorithm in the model through the simulation test.Finally,in order to test the actual working effect of the proposed differential evolution algorithm in the secondary water supply system,with the goal of low energy consumption and long life of the system,this thesis builds a control circuit and hardware experiment platform for the parallel pump system based on secondary water supply under the requirements of water conservancy,through constant head and constant flow experiment tests,it is concluded that when multiple centrifugal pumps are operated in parallel,the same speed of pump can be used to run the system with the highest efficiency;Then,a comparison experiment of the electricity consumption of per ton of water under the operation state of the traditional PID constant pressure frequency conversion water supply system and the improved constant pressure frequency conversion water supply system by the DE algorithm is carried out,and the feasibility of the low energy consumption and long life optimization control strategy proposed in this thesis is verified.