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Last edited 07 Jan 2021
Energy supply disruption
You probably didn’t, because the first major threat to the UK’s national grid this winter still left it with 2% spare capacity, sufficient for the National Grid to issue a ‘notification of inadequate system margin’ (NISM), but not enough to disrupt the service.
While this was only the first stage of alert, and while an abnormal lack of wind was an aggravating factor, bringing the UK’s wind-generating capacity almost to a halt, one of the mildest starts to November on record may have helped to save the day. As so often in human affairs, a near miss is treated as a near non-event. A single hit on the other hand could have major repercussions, prompting urgent action not just on the resilience of the UK’s national grid, but on how buildings respond to peaks and troughs in energy demand.
One of the noticeable trends during recent years is that more suppliers of building energy management solutions include some form of Demand Response as part of their solution. This enables a temporary reduction in the power drawn by certain services in the building where this does not impact on productivity or wellbeing.
The latest BSRIA review of global leaders in Building Energy Management showed that almost half now offer demand response, the highest figure seen to date. This includes both the global leaders in Building Automation and Energy Management and suppliers specialising in energy management.
At the same time, energy storage is being taken more serious as a viable and cost-effective way of providing additional resilience and peak capacity, both for energy suppliers and in some cases for consumers. While the UK is still some way from having a thriving market in home energy storage systems comparable to that developing in Germany (where residential electricity is significantly more expensive), it seems likely that any significant grid outages will give a boost to the market for battery storage for both residential and non-residential use.
It is still quite hard to judge how probable a major power outage is in the UK this winter. There are additional processes for demand reduction which can be invoked if the situation gets tighter than it did on November 4th. However a coincidence of severe cold with a lack of wind and unplanned outages at power stations is not inconceivable, and major strategic initiatives, such as the construction of two new nuclear power plants, will take years to come online.
The UK has become used to living dangerously, and so far has got away with it. But the sensible response to a lucky escape is to learn the lessons, and not to assume that your luck will go on holding indefinitely. All organisations should be looking at the potential implications of even a short interruption to power supplies, and how they can best mitigate these.
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