National Grid considers security standards review after blackout

Following the blackout on 9 August, National Grid has recommended a review of security standards to see if higher levels of resilience in the electricity system are needed.

On 10 September, National Grid ESO’s final technical report was released by Ofgem. The report will form evidence as part of the regulator’s formal investigation. Within the report, National Grid stated that any review should be done in a structured way that ensures the proper balancing of risks and costs.

Other recommendations made within the report included a review of the timescales of delivery for the Accelerated Loss of Mains Charging Programme, to reduce embedded generators being inadvertently disconnected, as well as a review into who is automatically disconnected from the distribution network. It further suggested assessment was needed into whether a set of standards for critical infrastructure, such as hospitals and emergency services, should be established to ensure their systems can continue operating in any future event.

The report also set out where lessons can be learned, such as ensuring timely and effective communication is supported in any future event.