A method for simplification of series pipes in water supply network based on transient simulation

Abstract

The present invention proposes a method for simplification of series pipes in a water supply network based on transient simulation, including: identifying the element system of series pipes in the pipe network model, determining the simplification error of the element system of series pipes, establishing an optimization objective function, calculating the weight coefficient, determining Prioritize the reducible cascaded piping meta-system, calculate the equivalent piping parameters of the reducible cascaded piping meta-system, and update the cascaded piping meta-system set and simplified error set. Repeat steps until none of the in-line piping metasystems can be simplified. The present invention can minimize the impact of simplification of series pipelines on the calculation and analysis of transient flow; the error of simplification of series pipelines can be quantified and evaluated through error parameters to realize effective control of the simplification process; The pipeline system starts to proceed sequentially, which effectively overcomes the potential defect that the conventional series simplification leads to a significant decrease in the accuracy of the model, and ensures the reliability and accuracy of the series simplification operation.

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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