Leakage Control Of Multi-source Water Distribution System By Optimal Pump Schedule

Leakage is a serious problem in water supply industry of china.With thedevelopment of the city，there are several source of water and the water supply networkbecomes more and more complex，the leakage is more serious than before.In order toreduce the energy consumption of water supply network and to control leakage.Thereare some measures can be taken to improve the economic benefits of water supplyenterprise, such as reasonable zoning and optimal scheduling of water supply system.Water balance analysis is the first important step to establish the water supplynetwork hydraulic model. The subject take the water balance analysis for the presentwater supply network to confirm the leakage of water supply network,and determine thenecessity of reducing leakage.According to the results of water balance analysis, it canbe seen the current leakage is serious and it is important to build a water supply networkmodeling and control leakage.The traditional water supply network hydraulic model considers the flow of node isfixed and equal to the user requirement, this is obviously unreasonable, in thissubject,the leakage will be added to each node as a part of node flow, and it put forwarda water supply network leakage hydraulic model.The model will be solved by geneticalgorithm. The model is applied to a network example and the modeling results will becompared with the traditional modeling results. The resuls of analysis showed that thePDD model can better reflect the actual operating conditions of water supply system.The objective function of the traditional optimal scheduling of water supply systemis to reduce energy consumption. Under the premises of ensuring the water pressure andwater demand of user been meeting, this paper presents a new objective function, it isthat the sum of leakage and power consumption of water supply system is minimum.The decision variable is the scheduling scheme of pump and valve. The paper builds awater supply system optimization scheduling and control leakage model, and thensolves it by the NSGA-Ⅱ algorithm.This paper will eatablish a PDD model of HD city, and check the model bymonitoring data.Then modify the nodal flow by adding the leakage to node.It analysesuperiority of the water supply network hydraulic model. In the pipeline under normalcondition, the water supply system optimization control of pump group leakage modelapplied to network, to determine the water supply system partition scheme andscheduling. The scheduling results were evaluated for analysis, water supply system optimal dispatching and the partition provides guidance.