On-line location method of pipe burst in urban water supply network based on scada data and real-time model

Abstract

The invention discloses a method for online positioning a broken pipe of an urban water supply network based on SCADA data and a real-time model. The method comprises the following steps of: firstly, detecting a pressure wave trough to determine the suspected pipe breaking time boundary and checking measurement points; then selecting measurement points with remarkable abnormality change in the measurement points according to the flow abnormality change of the measurement points after each pipe breakage happens; designating a rectangular region to serve as an initial region for searching pipe breaking points by a real-time optimizing and checking model according to locations of the measurement points; and finally iteratively solving a minimum value by taking the sum between the pressure simulation value and actual valve of a pressure measurement point in continuous cycle as the evaluation standard of a target function so as to acquire the most probable pipe breaking node pipe breaking flow. The method can be used for quickly detecting and positioning pipe breaking and other abnormal incidents with high accuracy, and reducing hurt of pipe breaking for the water supply network system.

Description

technical field [0001] The invention belongs to the field of urban water supply pipe networks, and relates to abnormal location of pipe bursts in water supply pipe networks, in particular to an online location method for pipe bursts in urban water supply pipe networks based on SCADA data and real-time models. Background technique [0002] Explosive pipe leakage is common in the water supply network, and it is sudden, which will lead to abnormal operation of the water supply system, affect the life of residents and enterprise production, and even endanger personal safety. However, the detection and location of pipe bursts are more complex, involving the dynamic conditions of the pipe network system when pipe bursts occur, and are affected by factors such as few measuring points, low measurement accuracy, poor real-time acquisition and transmission, and unreliable hydraulic models. At present, the pipe network explosion location methods mainly include methods based on online d...

AI Technical Summary

Problems solved by technology

[0002] Explosive pipe leakage is common in the water supply network, and it is sudden, which will lead to abnormal operation of the water supply system, affect the life of residents and enterprise production, and even endanger personal safety

However, the detection and location of pipe bursts are more complex, involving the dynamic conditions of the pipe network system when pipe bursts occur, and are affected by factors such as few measuring points, low measurement accuracy, poor real-time acquisition and transmission, and unreliable hydraulic models.

At present, there are mainly methods based on online data analysis (such as transient flow inverse analysis, etc.) and methods based on microscopic models (such as offline model abnormality check) for pipe network burst location methods. The former method is based on online data and can be realized to a certain extent. Preliminary estimation of bursting pipe flow rate and delineation of bursting point area, but it is easily affected by the noise of the pipe network, easy to miss diagnosis, and has a large positioning error; although the latter method can achieve accurate positioning in theory, the accuracy of the offline model is often low. There are inherent error sources. At the same time, because the explosion of the pipe will have a destructive impact on the pipe network system, it will directly affect the pressure situation in each area of ​​the pipe network, and will also cause fluctuations in the water pressure at the water inlet. The traditional offline model ignores this part of the change, which is easy to produce large positioning error

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