Leakage detection method based on hydraulic model calibration of urban water supply network

Abstract

The invention discloses a leakage detection method based on hydraulic model calibration of an urban water supply network. The method comprises the following steps: A) establishing a pressure-related leakage positioning model; B) determining a leakage detection target function; C) determining a constraint condition; and D) solving the pressure-related leakage positioning model. Urban water supply pipeline leakage is avoided, problems in a traditional leakage detection method are solved, the pressure-related leakage detection model is established on the basis of model calibration by a Cuckoo optimization algorithm, and the leakage detection method is quick and effective. In addition, a new pressure-related leakage detection method can detect leakage which is difficult to detect by a traditional method. A situation that a leakage area is detected before the engineers go to a scene is very useful for engineers, and the engineers can carry out intensive examination in a predicted area and can quickly detect an accurate position of a leakage hot water spot.

Description

technical field [0001] The invention belongs to the technical field of leak detection, and in particular relates to a leak detection method based on hydraulic model checking of urban water supply pipe networks. Background technique [0002] Leakage is a serious problem in the water distribution industry. In the past ten years, although many water supply pipe networks have been rebuilt, expanded and newly built according to the needs of urban development, and a large number of aging pipelines have been replaced, there are still a large number of pipelines that should be decommissioned, which makes the leakage rate of urban water supply pipe networks in my country common. higher. Not only has it caused huge economic losses, but it has also brought a bad impact on people's lives. The specific manifestations are as follows: [0003] (1) Reduced income. Although water is an inexpensive resource, water loss can still be very costly to water utilities. With the growth of the yea...

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Problems solved by technology

[0004] (2) Cause energy waste

The water treated by the treated structure is generally lifted by the water pump and then enters the water distribution pipe network, and finally distributed to each household. The water leakage in the water supply pipe network is also provided by the water pump, which consumes a lot of electric energy.

[0005] (3) Reduced the reliability of water delivery

[0011] 3) The amount of leakage does not represent the amount of water determined by pressure

[0012] 4) The method is not part of a well supported and maintained modeling package

In 2006, Nixon et al. carefully studied the scope of the validity of the inverse transient model, and found that its applicability is limited to simple reservoir-pipe network-valve configuration systems or transient small amplitude fluctuations in the reservoir-pipe network-reservoir system the case

However, the solution speed of the genetic algorithm is very slow, and this method cannot be used in large and complex water supply systems

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