Optimal Operation Of Urban Water Supply Network Considering Failure Risk Assessment Factors

The water supply network occupies an important position in the municipal infrastructure and is closely bound up with people’s production and life.However,as a complex and open system,it is vulnerable to natural disasters,deliberate sabotage,and system accidents.Due to the complexity and openness of the pipe network system,it will be threatened by man-made,natural and other aspects and cause pipeline failure.These threats will cause the failure of pipes.Pipe failure is due to pressure reduction or partial water supply interruption that reduces the reliability of the pipe network,which ultimately leads to dissatisfaction with users.Pipe failure includes all pipe bursts,leaks,and repairs required.Reliably and accurately analyze the causes of pipeline failure,predict the probability and consequences of the pipeline failure,evaluate pipe failure risk and formulate corresponding measures,which can reduce the number of pipeline failure and reduce the negative impact of pipeline failure.At the same time,with the development and progress of society,the water distribution network needs scientific and rational optimal operation to achieve the maximum pressure service level of the pipe network,reduce the failure risk of the pipe network,and improve user satisfaction.This makes the operation of the pipe network more energy-efficient and reasonable.In response to the above problems,this article focused on the failure risk assessment and optimal operation of the water distribution network.Based on the collected basic information of the pipeline network,user complaint records,and pipeline repair records,this paper analyzed the factors that cause pipeline failure,and discussed the laws of each factor and pipeline failure probability.This paper selected diameter,material,age,pressure,buried depth,and road grade as the evaluation indicators of failure probability,established a Logistic model to predict the failure probability of all pipelines.Selecting the unsatisfied water supply ratio after pipeline failure to evaluate the consequences of pipeline failure.Finally,the failure probability and failure consequences were integrated,and a pipeline network failure risk assessment model was constructed.The existing objective functions of optimal operation are mostly economic factors.In practice,it is found that the comprehensive performance of the pipe network has become more and more the object of attention of water supply enterprises.In this paper,the minimize failure risk of the urban water distribution pipe network was used as the objective function of optimal operation.The scheduling scheming of the pipe network pump station was solved through genetic algorithm.This article first analyzed the example pipe network to test the effectiveness of the model.Then this article combined with S city project example to test the research results.On the basis of the hydraulic model of water distribution network,this paper constructed an optimal operation model considering the failure risk assessment factors,and obtained the scheduling plan of the pump station after the solution.As a result,this scheme can reduce the failure probability and consequences of the pipeline,thereby reducing the failure risk of water distribution network.The failure risk of the example pipe network and S city project example has been reduced,and the reliability of the pipe network has been improved,so as to achieve good economic and social benefits.