基于水锤监测系统的供水管网瞬态过程分析技术及应用

Transient pressure analysis technology and application of water supply network based on water hammer monitoring system

有压管道中流体流态变化引起压力急剧变化,普通的低频压力监测无法准确反映输水管网瞬态水力特性.以西北某地区供水管网为例,对送水泵站和二次供水设备进行水锤监测,识别水锤特征并进行水锤风险分级及告警,解决普通监测设备无法识别水锤风险、不能进行水锤溯源分析等问题;基于水锤事件利用瞬态水力模型进行溯源分析,优化水锤防护措施,有效降低关阀速度过快引起的水锤增压,并通过水锤监测系统采集的实时数据验证了水锤防护优化措施的合理性.

The change of fluid flow pattern in pressurized pipeline leads to the rapid change of pressure,but the ordinary low-frequency pressure monitoring can’t accurately reflect the transient hydraulic characteristics of water transmission network.This paper takes the water supply network in Northwest China as study case.To solve the pain points such as normal pressure monitoring system can not identify water hammer risks,trace and analyze the root causes of water hammer events,the water hammer monitoring system,with functions to indentify the characteristics of water hammer,classify risk level of water hammer event and give an alarm when waterhammer happens,is implemented at the water supply pumping stations and booster stations;Based on the monitored waterhammer events,the transient hydraulic model is used for the tracing and analysis of root causes of water hammer and optimize the waterhammer protection meausre for the system.It effectively reduces the surge pressure caused by too fast valve closure,and the effectiveness of the optimized water hammer protection measure is verified by the real-time data collected by the water hammer monitoring system.