DMA最小夜间水量的预测与应用  

Prediction and application of minimum night consumption in DMA

作　　者：张文体 甄非非 梁伟文 ZHANG Wenti;ZHEN Feifei;LIANG Weiwen(Sanchuan Intelligent Water Research Institute(Hangzhou)Co.,Ltd.,Hangzhou 311121,China;Kaiping Water Supply Group Co.,Ltd.,Guangdong 529300,China)

机构地区：[1]三川智慧水务研究院(杭州)有限公司,杭州311121 [2]开平市供水集团有限公司,广东529300

出　　处：《给水排水》2024年第S1期397-403,共7页Water & Wastewater Engineering

摘　　要：最小夜间流量(MNF)是判断DMA分区是否存在漏损的重要参考数据,但受限于采样间隔等现实条件,MNF呈现出一定的随机性和动态变化的特点。如何给MNF设定一个合理的阈值,对异常变化进行报警,在减少误报的同时又避免漏报,一直都是漏损管理人员非常关心的问题。最小夜间水量(MNC)概念的提出,是结合开平供水的控漏实践,快速发现管网漏损的一个尝试;即参考MNF的原理,从MNC和日用水量的关系出发,建立回归方程,对MNC进行预测;根据误差值的分布区间,设置合理的报警阈值,可快速发现漏点。Minimum night flow(MNF)is an important reference data to judge whether there is leakage in DMA,but due to the practical conditions such as sampling interval,MNF presents some characteristics of randomness and dynamic changes.How to set a reasonable threshold for MNF,alarm for abnormal changes,avoid omissions while reducing false alarms,has always been a concern for leakage managers.Based on the leakage control practice of Kaiping Water Supply Co.,Ltd.,it's an experiment to put forward the concept of minimum night consumption(MNC).That is,referring to the principle of MNF and the relationship between MNC and daily water consumption,set up a regression equation for predicting MNC.According to the distribution interval of the error value,setting a reasonable alarm threshold can identify leakage quickly.

关 键 词：最小夜间水量 时均水量 皮尔森线性相关系数 回归方程 报警阈值 

分 类 号：TU991[建筑科学—市政工程]