Complex sentence: The Northern Region Grid, which provides Power Supply to 9 States of Northern India including Delhi, experienced a widespread outage due to a grid disturbance that occurred at about 2.35 a.m on 30th July, 2012.
Split into simpler sentences: The Northern Region Grid was failed which provide Power Supply to 9 States of Northern India including Delhi. It was due to Grid disturbance that occurred at about 2.35 a.m on 30th July, 2012.