Method and system for calculating leakage amount based on DMA zoning flow

Abstract

The invention discloses a method and a system for calculating the leakage amount based on DMA zoning flow. The method comprises the following steps: a flow meter is installed at an inflow point of theDMA partition; the upload interval time of the flow meter data is set. The sampling data of the flowmeter is uploaded to the SCADA system in real time, and then the sampling data of the SCADA systemis called by the water supply management system, and the sampling data is stored in the database of the water supply management system. According to the sampling data, the first flow data and the second flow data are obtained, the minimum night flow time period is determined, and whether the second flow data conforms to the normal distribution is judged, so as to determine the leakage amount of the DMA partition. By calculating the leakage amount after judging the normality of the second flow rate data, the accuracy of the calculation result of the leakage amount can be improved and the calculation efficiency can be improved.

Description

technical field [0001] The present invention relates to the technical field of leakage calculation of a water supply pipe network, and more particularly, to a method and system for calculating leakage based on DMA partition flow. Background technique [0002] With the rapid development of urbanization, the importance of water supply system as a part of municipal public utilities has been further highlighted, and the problem of water supply leakage is also plaguing water supply companies and water affairs authorities. According to the "2016 Urban and Rural Statistical Yearbook", my country's urban public water supply leakage amounted to 7.8 billion cubic meters in 2016, and a large amount of water resources were lost in vain. Because there are various forms of leakage and many causes, such as damage to the main body of the pipeline, damage to the connection of the pipeline, leakage of pipeline accessories (gates, valves, fire hydrants, etc.), it is extremely complicated to ca...

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Problems solved by technology

The leakage calculation method provided by the prior art has the following defects: First, the determination of the minimum flow time period at night is not scientific enough. Generally, the time period adopted is 2:00-4:00, which can be seen from the regional level. However, for the western region, take Lhasa, Urumqi and other cities as examples. They are located in the sixth district of the east, and there is a two-hour time difference with Beijing (the eighth district of the east). If 2:00-4:00 is still used as the minimum traffic time period at night , which is not very scientific for some areas; secondly, abnormal data points are not eliminated. During the data collection process, due to meter problems or network problems during data transmission, abnormal data points may be generated, which need to be calculated By eliminating these abnormal points during the process, the calculation result can be more accurate and closer to the actual leakage value

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