Offshore Wind Farms On-Site Submarine Cable Testing and Diagnosis with Damped AC

Edward Gulski, Rogier Jongen, Aleksandra Rakowska and Krzysztof Siodla
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Edward Gulski: Onsite hv solutions AG, Lucerne, Toepferstrasse 5, 6004 Lucerne, Switzerland
Rogier Jongen: Onsite hv solutions AG, Lucerne, Toepferstrasse 5, 6004 Lucerne, Switzerland
Aleksandra Rakowska: Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland
Krzysztof Siodla: Institute of Electric Power Engineering, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland

Energies, 2019, vol. 12, issue 19, 1-14

Abstract: The current power cables IEC standards do not provide adequate recommendations for after-laying testing and diagnosis of offshore export and inter-array power cables. However the standards IEEE 400 and IEEE 400.4 recommend partial discharge monitored testing, e.g., by continuous or damped AC voltages (DAC). Based on the international experiences, as collected in more than 20 years at different power grids, this contribution focuses on the use of DAC for after-laying testing and diagnosis of submarine power cables both the export and inter-array cables. Higher risk of failure, long unavailability, higher repair costs, and maintenance costs imply that advanced quality control is becoming more important. The current state of the existing and drafting international standards are based on onshore experiences and not related to the actual serious problems experienced with failures on export up to 230 kV and inter-array cables up to 66 kV. The application of damped AC as a testing solution in this concern is specially discussed. The advantages of this testing technique, in combination with actual testing examples, show the findings on export and inter-array cables at offshore wind farms.

Keywords: offshore; export cables; inter-array cables; damped AC voltage (DAC), after-laying cable testing; on-site diagnosis; condition assessment; partial discharges; and dissipation factor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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