基于混沌理论的城市供水系统漏损检测新方法  

A New Method to Leak Detection in Water System Based on Chaos Theory

作　　者：张琴[1] 朱庆建[2] 汪雄海[1] 

机构地区：[1]浙江大学电气学院,浙江杭州310027 [2]华信邮电咨询设计研究院有限公司,浙江杭州310014

出　　处：《计量学报》2013年第3期256-261,共6页Acta Metrologica Sinica

基　　金：基金项目：国家“973”重点基础研究发展规划资助（2009CB320602）;浙江省重点专项资助（2006C11227）

摘　　要：针对漏损检测对城市供水系统节能降耗的重要性，研究时用水量的混沌特性并提出一种基于混沌理论的漏损检测新方法，利用沿程用户时用水量的混沌演化特性来检测漏损故障和漏水。根据城市时用水量的时间序列，提取关联维数、最大Lyapunov指数、吸引子相图和R／S等混沌特征指数，分析沿程城市用水量观测序列的分形和链级混沌关联，并在此基础上，依据系统相图和最大Lyapunov指数变化来比较漏损故障和漏水时序的不同混沌特性。仿真结果表明，漏损故障时的混沌特性显著改变并能立即检测到，缓慢漏水2h后混沌特性变化明显，为及时修补供水系统提供依据，减小了资源损耗。Considering the importance of leak detection to energy efficiency in urban water system, a new method to leak detection based on chaos theory is presented. The chaotic evolutional characters of successive users were used to detect pipe break or the leakage. By extracting the correlation dimension, Lyapunov exponent, attractor phase diagram and R/S analysis of hourly water consumption, the water time series of successive users were proved to be fractal and chaotic chaining relevant. On the basis, the different chaotic characters of booster and leakage were compared by phase diagram and the maximum Lyapunov exponent variation. Test results show that the chaotic characters are changed immediately when the booster occurs, and slow leakage can be discovered after two hours. Thus this method supplies new judgments to effectively amend water system in time and decrease the loss of water resource.

关 键 词：计量学 漏损检测 混沌理论 供水系统 LYAPUNOV指数 吸引子相图 

分 类 号：TB937[一般工业技术—计量学]