Technical brochure
TB 810 WG B5.54

Protection and automation issues of islanded systems during system restoration/black start

There is an increase in wide-scale blackouts due to the increase in natural disasters events, increased grid interconnectivity and load and generation mix change. Quick system restoration, after a widescale blackout, is becoming increasingly necessary as we move towards increased electrification of process-heat and transportation load to meet low-carbon energy systems. Based on blackout postmortems, system restoration has been observed to be delayed resulting from protection equipment operation which in certain situations behaves differently during restorative conditions. These unintended protection actions could cause coordination delays that could eventually lead to other lengthier restoration plans (out of the many options to reenergizing core grid) experienced following a large-scale blackout event.

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B5

Protection and automation

This Technical Brochure has been created by a Working Group from the CIGRE Protection and automation Study Committee which is one of CIGRE's 16 domains of work.
The scope of the Committee covers the principles, design, application and management of power system protection, substation control, automation, monitoring, recording and metering – including associated internal and external communications and interfacing for remote control and monitoring.

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