SP Energy Networks (SPEN) has successfully used renewables to re-energise a portion of its distribution network as part of ground-breaking trial with National Grid Electricity System Operator (ESO).
The capability to restart the power grid in the event of a partial or total shutdown of the national transmission network – referred to as black start – has previously been provided by large transmission-connected fossil fuel power stations.
The Ofgem-funded Distributed ReStart project, which also involves energy consultancy TNEI, is seeking to develop the capability to kick start the electricity system using smaller wind, solar and hydro generators connected at the distribution level.
The second phase of the project saw SP Energy Networks re-energise an isolated section of its network using a hydropower plant at Kendoon and turbines from two small wind farms at Glenchamber and North Rhins.
The distribution network operator said the live trial required close coordination between multiple assets and the controls room of itself and the ESO.
Scott Mathieson, network planning and regulation director at SPEN, said: “The increasingly complex needs of our energy system, coupled with the significant increase in both demand for green electricity and generation our networks need to accommodate, means it is crucial we ensure its continued security and resilience.
“We’re really encouraged by the success of this latest trial on the Distributed ReStart project, which could be vitally important, not just in Scotland and the UK, but worldwide.
“Using DERs and green energy to restore the energy system would increase the diversity of providers, helping to save millions of pounds in costs for customers thanks to a more competitive market.
“It can also save hundreds of thousands of tonnes of carbon emissions by negating the need for coal and gas power stations, therefore pushing us forward on decarbonisation plans as we strive to reach net zero emissions.”
Julian Leslie, head of networks at National Grid ESO, said: “We have one of the world’s most reliable electricity networks, but our role is to be prepared for the most extraordinary of scenarios, including a nationwide power outage.
“This trial is a breakthrough moment for our Distributed ReStart project, which stands to improve system resilience and security of supply in a cleaner and cheaper way.
“We are always innovating for a greener future and the huge growth of green energy sources on distribution networks presents an opportunity to reduce our reliance on fossil fuels and co-ordinate a black start using renewables.
“The concept of meeting our grid restoration needs by renewable generation alone has become closer to reality as a result of this trial.”
Scottish Power Renewables has previously used its 69MW Dersalloch onshore windfarm in South Ayrshire to re-energise part of the transmission network.