Transient simulation-based method for simplifying series pipelines of water supply pipe network

Abstract

The invention provides a transient simulation-based method for simplifying series pipelines of a water supply pipe network. The method comprises the steps of identifying series pipeline metasystems ina pipe network model; determining simplification errors of the series pipeline metasystems; building an optimization objective function; calculating a weight coefficient; determining the series pipeline metasystems which can be simplified in advance; and calculating equivalent pipeline parameters of the series pipeline metasystems which can be simplified, and updating a series pipeline metasystemset and a simplification error set. The steps are repeated until no any series pipeline metasystem can be simplified. According to the method, the influence of series pipeline simplification on transient flow calculation analysis can be minimized; the series pipeline simplification errors can be subjected to quantitative evaluation through error parameters, thereby realizing effective control ofa simplification process; and the simplification is started for the series pipeline system with the minimum simplification error in the pipe network in sequence, so that the potential defect of remarkably reduced model accuracy due to conventional series simplification is effectively overcome, and the reliability and accuracy of the series simplification operation can be ensured.

Description

technical field [0001] The invention relates to the fields of municipal engineering and urban water supply pipe network. Background technique [0002] With the development of science and technology and the improvement of residents' living standards, the informatization and intelligent management of urban water supply pipe networks is an inevitable development trend, and it is also an important part of my country's smart water construction. The establishment and application of the hydraulic model is an indispensable key part of the informatization and intelligence of the pipeline network, and it is also an important prerequisite for the leakage monitoring and optimal operation of the water supply pipeline network. With the development of the economic level and the continuous expansion of urbanization scale, the scale of the water supply pipe network system is increasing day by day, which leads to the increase of the scale and complexity of the pipe network hydraulic model, ma...

AI Technical Summary

Problems solved by technology

However, when there is a sharp and obvious change in the hydraulic state in the pipe network (that is, the transient flow state), the calculation results of the simplified model formed by this conventional model simplification method may be significantly different from the original model.

This is because the conventional simplification method based on steady flow takes into account the principle of hydraulic equivalence, which can ensure that the steady-state hydraulic calculation results before and after model simplification have little difference, but it does not take into account the transient pressure wave in different systems in the process of transient flow. Due to the complex propagation process between components, there may be significant differences in the transient flow calculation and analysis results before and after model simplification

It can be seen that the simplified method based on steady flow can easily lead to a decrease in the accuracy of transient simulation analysis of the pipeline network, which in turn leads to unreasonable design of transient prevention and control measures (function failure or cost waste), thus causing a significant impact on the operation and management of the pipeline network. Hidden danger

From this point of view, the simplification of the transient flow model of the water supply network still lacks a scientific, reasonable and effective method

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