Orsted’s 1218MW Hornsea 1 offshore wind farm off Yorkshire suffered a technical fault prior to a wider UK power system failure that left thousands without electricity on 9 August.
The Danish developer said the project lost 800MW of load during the incident.
“During a rare and unusual set of circumstances affecting the grid, Hornsea 1 (pictured) experienced a technical fault which meant the power station rapidly de-loaded – that is it stopped producing electricity,” a spokeswoman said.
Orsted said National Grid would “normally” be able to “cope with a loss of this volume”.
“If National Grid had any concerns about the operation of Hornsea 1 we would not be allowed to generate,” the spokeswoman added.
“The relevant part of the system has been reconfigured and we are fully confident should this extremely rare situation arise again, Hornsea 1 would respond as required.”
National Grid has attributed the root cause of the wider power system outage to the almost simultaneous loss of Hornsea 1 and RWE’s 727MW Little Barford gas-fired plant in Bedfordshire.
National Grid Electricity System Operator (ESO) is due to submit an interim report on the incident today to energy regulator Ofgem.
The report will be published next week, it is understood.
A National Grid ESO spokesman said the organisation will not comment on the findings of the interim report until after publication.