Pressure Zoning And Low Pressure Improvement Of Urban Water Supply Pipeline Network

Pressure management is one of the important methods to solve the hot issues such as uneven distribution of pressure and serious leakage of urban water supply network.Based on a large number of related studies at home and abroad,this paper has carried out the following research:(1)Pressure analysis method of urban water supply network based on Pearson correlation:Using Pearson Correlation Analysis method,the correlation analysis of the actual pressure data of 61 pressure monitoring points in SX City water supply network is carried out,61 pressure monitoring points are divided into different sub-networks,and the central nodes and associated nodes are determined.The example shows that the pressure difference of different sub-networks is large,but the pressure change of pressure monitoring points in the same sub-network is consistent,and the method can be used to analyze the pressure distribution of the existing network and provide reference for the adoption of pressure management measures.(2)Controllability analysis of urban water supply network based on VARX model:Under the condition of complex topology structure and difficult mechanism modeling,the VARX model of SX City DMA area is established by means of data,and then the model of different time interval is processed,which is transformed into the form of state space expression.Finally,the controllability of the DMA region is analyzed by the controllability criterion of the state space expression.The controllability of network is the premise of pressure blending and solving uneven pressure on network.(3)Low pressure improvement method based on block and stacking pressurization:The experimental analysis is carried out on the EPANETH2 simulation network,according to the simulated joint pressure and flow direction,the relatively closed low pressure to be improved area is formed by adding the check valve in the area,and then the pressure compensation of the area is carried out by means of laminated pressure pressurization.Numerical examples show that this method can effectively improve the pressure of low pressure area.To sum up,this paper focuses on the pressure management problem,carried out the network pressure zoning,controllability analysis and low pressure improvement and other aspects of research,in order to provide guidance on the actual operation of the water supply network.