High voltage engineer EDS has carried out a cable testing campaign for Vattenfall at Horns Rev 1 after the offshore wind farm off Denmark experienced network issues.
EDS said it used Damped AC testing to collect beneficial partial discharge and tano data to interpret the condition of the array cables and subject the entire array system to a high voltage withstand test.
All array cables were tested from one single point on the offshore platform. The company said this avoided multiple transfers of equipment and personnel, which provided safety benefits and Vattenfall with the confidence to re-energise its network safely.
EDS group engineering director Luke Bishop said: “VLF testing has been the “go-to” test system to-date.
“However, despite VLF’s advantages, it doesn’t have the benefits offered by DAC to test long lengths of array cables through multiple switchgear positions and collect PD and tanδ data, all from a single point.
“Due to excellent collaboration between EDS, Vattenfall and technology suppliers Onsite HV/EMT, we completed the campaign efficiently and successfully.”