How does it work? Once installed at the main MV substations in an open-loop network, Easergy T200 units establish peer-to-peer communication using a virtual private network. If a fault occurs within the network the control center is notifi ed, but there’s no need to wait for an operator response. Instead, the Easergy T200 units communicate with one another automatically to determine where the fault has occurred, isolate it, and re-energize the unaffected areas of the grid.


“The self-healing solution allows Stedin to locate and insulate the MV fault as quickly as possible while disturbing the minimum of customers,” commented Lucas Pellegrin, Feeder Automation VP at Schneider Electric.


“When I say as quick or as fast as possible, it is less than 1 minute to reconfi gure the global network,” he added.


Adding intelligence to the grid Stedin’s underground self-healing solution, comprising an open-loop network of around


SE TV


33 MV substations in downtown Rotterdam, was inaugurated in June 2012. The whole project took around a year to complete, from design to energization.


“I believe that we have to serve our customers better and better, so we put the self-healing network — and also more intelligence — in our grid,” said Marko Kruithof, Grid Coordination Manager at Stedin.


Now, in case of an outage that might otherwise last 2 hours, the system cuts the time to re-energize the unaffected parts of the grid to under 30 seconds. That translates to greater power availability for important commercial customers, as well as vital government offi ces. Also, by automatically isolating the affected area, it takes less time to fi nd, diagnose, and fi x the problem.


“Electricity is very important nowadays. It’s like water and air. It’s everywhere”, Kruithof stated. “An outage must be as short as possible, because when there is an outage life stands still.”


See for yourself how the underground self-healing network solution works. Visit tv.schneider-electric.com and watch “Stedin: A Self-Healing Utility”!


“


We have to serve our customers better and better, so we put the self-healing network — and also more intelligence – in our grid.” Marko Kruithof,


Grid Coordination Manager, Stedin


Here’s how it works: 3 4 1 2


Fault occurs Isolate Close open point Isolate Close


1 2 3 4


The self-healing network isolates the faulted area, restoring power to unaffected customers in under 30 seconds.


*This solution is not available in the United States www.SEreply.com • Intelligent Energy 13


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