GC0079: Frequency Changes during Large Disturbances and their effect on the total system - Phase 1 & 2

Grid Code Modifications GC0036 and GC0079  have now been superseded by Distribution Code Modifications DC0036 and DC0079. Please refer to the Distribution Code link below for Modification related documentation: http://www.dcode.org.uk/current-areas-of-work/  Please note: all documents on this page will remain accessible as an archive to the new Distribution Code website area. As of 01 October 2017 all new documentation for these two Modifications will only be available on the  Distribution Code website.