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供水管网运行状态的准确把握,对供水管网的健康监测与诊断至关重要,而监测点压力是管网运行状态最重要的标志之一。提出用于供水管网监测点压力在线预测的EMD(经验模态分解)与自回归模型相结合的方法,并对EMD组合模态所蕴含的物理意义进行了阐述。通过一实际供水管网中某监测点压力的在线预测与实际监测值的比较,验证了方法的有效性,此方法可提高城市供水管网健康的在线监测与诊断的效率。
The accurate control of the operation status of the water supply network is crucial to the health monitoring and diagnosis of the water supply network, and the monitoring point pressure is one of the most important signs of the operation status of the network. An EMD (Empirical Mode Decomposition) method combined with autoregressive model is proposed for on-line pressure prediction of water supply network monitoring points. The physical implications of EMD mode are also described. The effectiveness of the method was verified by comparing the online prediction of the pressure of a monitoring point with the actual monitoring value in an actual water supply network. This method can improve the efficiency of on-line monitoring and diagnosis of urban water distribution network health.