Re: SCADA systems for drinking water utilities
This is great question, a question we are being asked a lot about recently. More and more utilities want to bring SCADA into GIS, as well as GIS into SCADA. GIS will not replace SCADA and should not replace SCADA, but we need the two to play nicely. We are seeing utilities building widgets, plug-ins, essentially tools in their GIS system, to visualize SCADA or any real time sensor in GIS. GIS will store the location of the sensor or device and some basic information, type of device, ID, etc... When the user highlights or clicks on the device, it makes a call, either in to the SCADA system or the historian, to look at the most recent value or a series of values. Another tool monitors the SCADA system or historian and looks for alerts. So when a device’s raises an alert, a pop up is shown on the GIS map. From the SCADA side, we are seeing a similar integration. From the control console, a device can be clicked or selected. A map is then shown with the highlight device or facility. This map will not only contain the distribution or plant network, but other operational data, like workorders, AVL feeds, reported leaks, etc... So the SCADA operators can see what is going on daily in the system and see if those operations are effecting the information he/she is seeing.
Integration of SCADA can be complicated, due to legal and technical issues. Typically the SCADA system in outside the firewall, either in the DMZ or completely isolated from the internal network. A lot of clients develop a process to replicate data from the historian to a production database internally and use that database for integration. This guarantees that the GIS/SCADA integration will not affect the SCADA operations. The downside is there is a lag between the real time SCADA and viewing that information in the GIS system.
If you have additional questions, contact us at ArcGISTeamWater@esri.com.
Last edited by MikeMillerGIS; 06-08-2010 at 03:33 AM.
Tags for this Thread