Research On Control And Leakage Point Analysis Localization Of Municipal Water Supply Network

The key research contents of this paper is the leakage problem of urban water supply network. Through the analysis of leakage causes, and this paper puts forward corresponding leakage control strategy,and under the condition of laboratory to simulate pipeline leakage how it happened, from microscopic to run on the leakage of pipeline hydraulic calculation. Based on C language, this paper combines the form of objective function with the PSO algorithm,to establish the computer model of preliminary positioning pipeline leakage.By running the the computer model of preliminary positioning pipeline leakage,this paper compares the data of the computer model with the actual result,to verify the accuracy of the model inversely.The conclusion not only provide theoretical support for leakage control,also provide theoretical support in the actual operation of pipeline leakage location in the future.First of all, this paper based on the field survey of the status quo of Chaohu city water supply pipe network,combined with the operation of pipe network history data,to analyze the current situation of pipeline leakage.The purpose of analysis is to find out the main reason for the high leakage(mostly over 25%),and then according to the different leakage reasons, puts forward the feasibility of leakage control strategy. As of today,the water supply pipe network leakage rate by the former value of 27% to 21% today.Secondly, the topological prototype is based on the actual water supply pipe network in a certain area in Chaohu, based on the topological prototype,to build laboratory model of water supply network.The purpose of the model is to study the leakage control and leakage point location problem. This paper describes the use method and principle of EPANET,which is the necessary software for study leakage simulation,and then describes the function of Toolkit,which is used to analysis and calculation engine.It describes the programming method of combination with the outside world in detail, the ideas of process of hydraulic analysis calculation and programming, and then the programming process instance is given, which is using the definition of the Toolkit libraries based on C language. According to the established model, using the analysis and calculation engine Toolkit to hydraulic calculation in pipe network positively.Thirdly, through the pressure drop problem which was caused by simulated single-point leakage on laboratory network,and pressure changes problem of monitoring stations around the leakage point which caused by single-point leakage.The paper studies on preliminary positioning of the pipe network. Through all the pressure monitoring points pressure drop that was caused by EPANET simulation single-point leakage,comparing the obtained pressure contour map with the actual leakage pressure contour map,the results show that the pressure contour map which was simulated by EPANET has a indication for the leakage point localization.( By contrast with normal pressure contour, contour changes exist obvious area's increased risk of leakage)Finally, comparing the leakage point localization results which was simulated by the computer model with the results of the actual pipe network leakage point location, the results show that leakage point location error is only a ring gap between the simulation of leakage point location and the actual leakage point,and then to define the accuracy of the preliminary leakage point positioning computer model.