Research Of Burst Detection Based On SCADA

To monitor and solve pipe bursts in the water distribution system (WDS) worldwide, existing methodologies usually use indirect observation like figuring out the property change of pipeline material integrity, the oscillation of pipe wall or the acoustic noise. While in recent years, with the widespread use of Supervisory Control and Data Acquisition (SCADA) system by water companies, automatic burst detection method is highlighted.The current situation of pipe leaks and leakage control are summarized in this thesis to have a better view about the problem. Then, by comparing the status of hydraulic model between normal and burst-existing situations, a burst detection methodology is proposed based on the change of pressure and flow monitored by SCADA. Because of the existing noise from the instrument and state change caused by volatile water consumption and status change of valves, there is pressure background noise in the WDS; then the characteristics of pressure parameters of Guangzhou’s SCADA system are analyzed thoroughly to estimate the distribution and the normal range of them, and the thresholds against which the data are evaluated can be set according to the characteristics. Then the pressure fall derived by water distribution model is used to analyze the impact of pipe burst; according to the above thresholds and pipe burst impact, the minimum detectable diameter of pipe burst is suggested. The proposed methodology is applied to the same WDS. With the one-year records of historical burst events of this reservoir, the number of false alarm errors and missed detection errors are gained. The method is then applied to two real cases.The result shows that the methodology is of feasibility, effectiveness and practicability.