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A method for detecting abnormal events in water supply network based on varx model

A technology for abnormal events and water supply network, which is applied in the fields of instrumentation, calculation, electrical and digital data processing, etc. It can solve the problems of less application and research of microscopic models, and achieve the effect of strong detection ability and strong anti-interference ability.

Active Publication Date: 2019-09-27
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the microscopic model needs to know the detailed information of the pipe network system, such as the topological structure of the pipe network, the material, length, diameter, friction and other specific information of the pipe section, and there are few domestic application researches based on the microscopic model.

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  • A method for detecting abnormal events in water supply network based on varx model
  • A method for detecting abnormal events in water supply network based on varx model
  • A method for detecting abnormal events in water supply network based on varx model

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Embodiment Construction

[0049] In order to make the technical means and creative features realized by the present invention easy to express, the real-time mode of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0050] In this example, a DMA (District Metering Area) area is considered, and there are 10 effective pressure measuring points, and its geographical location is as follows figure 1 . At the same time, three water inlet pressure points (represented by P1, P2, P3) and water consumption in DMA area are introduced as exogenous variables. The time range of pressure data is from March 20, X to April 3, X, and the data from March 20 to April 2 is used to establish a model to detect the abnormal event of "5 simulated pipe burst tests" on April 3. Measurement. Here, only pressure values ​​are used for illustration, but the method of the present invention is also applicable to flow values.

[0051] Step 1. Determine input ...

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Abstract

The invention discloses a method for detecting abnormal events of a water supply pipe network based on a VARX model. The present invention first performs grouping of measuring points to determine input samples. Secondly, the VARX model is established by grouping. The pressure prediction is then made and the variance calculated, and the mean and standard deviation of the variance calculated. Finally, abnormal events are detected according to the abnormal event judgment rules. The method for detecting abnormal events of the water supply pipe network based on the VARX model and adopting difference analysis has the characteristics of strong anti-interference and strong detection ability.

Description

technical field [0001] The invention belongs to the field of urban water supply, in particular to a method for detecting abnormal events of a water supply pipe network based on a VARX model. Background technique [0002] Hidden leaks and burst pipes are two common abnormal events in urban water supply pipe networks. The former has the characteristics of long duration, small scale, and imperceptibility, while the latter is just the opposite, characterized by suddenness, uncertainty, and large scale. . It is particularly important for the safe operation of the water supply network to discover leakage events in the water supply network in time, accurately locate the location of the event, and take rapid measures to prevent the situation from deteriorating. [0003] At present, the detection of abnormal events in the water supply network is mainly based on the micro-hydraulic model and the macro-data model. Among them, the microscopic model needs to know the detailed informati...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 徐哲熊晓锋洪嘉鸣何必仕陈云
Owner HANGZHOU DIANZI UNIV