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Loss of critical infrastructure leads to loss of power

On Saturday, two critical lines connecting Queensland to the rest of the National Electricity Market (NEM) were lost resulting in load shedding. In total, New South Wales shed 800 MW of load, Victoria 280 MW and 80 MW in Tasmania. This was predominately industrial load which was reconnected within an hour. Lightning is the most likely cause.

While farmers in Northern New South Wales and Southern Queensland were celebrating much needed rain, the transmissions lines between Bulli Creek and Dumaresq tripped off. At the same time, the line was lost between Armidale and Tamworth in Northern New South Wales. At the same time, South Australia was separated from Victoria. Refer to image below for map reference.

Source: AEMO

AEMO is still investigating the causes, however there is likely to be issues regarding frequency response capabilities as this is limited in region.

AEMO expects to release a full report once they have all the necessary information. At this stage, they are not expecting further loss of load.

If you have any questions regarding the event, call Edge on 07 3905 9220 or 1800 334 336.