Water supply pipe network node water demand checking method coupled with pressure prior information
A priori information, water supply network technology, applied in general water supply conservation, instrumentation, electrical and digital data processing, etc., can solve problems such as inaccuracy and difficult to accurately quantify, improve the calibration accuracy, and avoid the deterioration of algorithm performance. , the effect of improving utilization efficiency
Pending Publication Date: 2021-12-28
淄博市水务集团有限责任公司 +2
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An outstanding feature of this pressure information is that it is not as precise as the data provided by the sensor, and it is difficult to accurately quantify it with a specific value
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[0016] The purpose of the present invention is to provide a water supply pipe network node water demand checking method coupled with pressure prior information. The prior information of nodal pressure is modeled with uniform probability distribution to describe the boundary constraints of nodal pressure; the data assimilation framework is used to check the nodal water demand by combining the prior information of pressure and other information (such as observation data). The invention has significant potential for improving the accuracy of water supply network modeling.
[0017] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0018] For a water supply network, there are n nodes in total, the number of monitoring points is m, and the number of nodes with known pressure prior information is s. The water supply pipe network node water demand checking method coupled with pressure prior inf...
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The invention discloses a water supply pipe network node water demand checking method coupled with pressure prior information, wherein the method comprises the following steps: (1) predicting prior water demand and a covariance matrix thereof through a water demand prediction function, and obtaining node water demand prior probability distribution; (2) acquiring node pressure prior probability distribution through building and floor information of an area where a user is located through on-site survey; (3) obtaining pipe network pressure and flow monitoring data and a covariance matrix thereof through pipe network pressure and flow sensors, and obtaining a monitoring data likelihood function; (4) establishing a checking objective function based on the Bayes theorem; and (5) linearizing the target function, obtaining a node water demand iteration step size, and solving the node water demand through continuous iteration. According to the method, the node pressure uniform distribution prior probability model is established to ensure that the pressure value calculated by the model is distributed in a reasonable interval, so that the node water demand checking precision is improved, and a scientific basis is provided for hydraulic modeling of a water supply pipe network and the like.
Description
technical field [0001] The invention belongs to a method for checking water demand of urban water supply pipe network nodes, in particular to a water supply pipe network node water demand check method coupled with pressure prior information. Background technique [0002] The hydraulic model of water supply network is widely used in real-time modeling of water distribution system, which can be used to improve the efficiency of system analysis, design and operation. The node water demand is the most uncertain input parameter in the hydraulic model, which has a great influence on the accuracy of the model output. Therefore, it is an important step for network simulation to check the water demand of each node in the network. [0003] The water demand calibration of the water supply network refers to the adjustment of the node water demand so that the calculation results of the pipe network model are consistent with the data monitored by the sensors arranged in the pipe network....
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IPC IPC(8): G06F30/18G06Q50/06G06F113/14G06F119/14
CPCG06F30/18G06Q50/06G06F2113/14G06F2119/14Y02A20/152
Inventor 耿伟姚磊邵煜徐德强楚士鹏
Owner 淄博市水务集团有限责任公司