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Issue 874 | Electricity Operational Forum

Electricity Operational Forum 1 July 2019 Robert Longden   Assessment   Supplier/ Shipper Generator/ producer Transmission/ networks Large Consumers Potential Impact - Electricity 3 3 3 3 1 = Critical Issue; 2 = Significant Commercial Impact; 3 = Intermediate Commercial Impact; 4 = Modest Commercial Impact; & 5 = No Obvious Commercial Impact. Attendees: The forum was held at the Faraday House, Warwick. It was attended by a broad spectrum of industry players including supply, generation and service companies and Cornwall Insight. Headlines Balancing Services Use of System/system cost outturns were provided for the period February to May 2019 The Rate of Change o Frequency (RoCoF) limit is trending down year-on- year as conventional plant with high inertia is withdrawn from service. In addition to conventional system management actions such as reducing the largest infeed loss and increasing system inertia via plant substitution, National Grid Electricity System Operator (NGESO) is reviewing the SQSS and working to introduce stability products to manage increased inertia, fault level in-feed and reactive capability Loss of Main Protection settings are being revised as part of an industry- wide initiative. Once complete, this will result in a relaxation of RoCoF limits NGESO has recently published an update to their first Operability Strategy Report which addresses future operability challenges and the “zero carbon 2025” ambition set out in the draft business plan. The update covers developments in the following areas of service provision: thermal, frequency voltage stability and restoration NGESO is continuing the roll out of its Platform for Ancillary Services (PAS) to encompass a number of services. PAS forms part of ...

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