What are the issues ? Switching, protection and Isolation Subsea cable fault repair Failure minimisation – maximise revenue Electrical losses
Solutions - Switching, Protection and Isolation Increasing degrees of automation required Use of motorised ring switches Use of Fault Passage Indicators Reduce visits to farm Avoid personnel transfer to turbines
Solutions - Switching, Protection and Isolation
Solutions - Subsea cable fault repair Use of Time Domain Reflectometers or search coil Cable on shore link may be tens of meters away from original burial position Burial methods require careful analysis
Solutions - Failure minimisation Cost of single cable fault in 60 MW wind farm is £650K Use of standby power from Offshore diesel equipment Use of interconnected electrical systems
Solutions - Failure minimisation Layout at North Hoyle
Solutions - environment Equipment utilised must have a marinised specification Shore link cable requires careful analysis of burial depth and protection requirements – Geotechnical data required.
Conclusions Onshore electrical arrangements – not valid The protection of the shore link cable is critical compared to inter-link cables Equipment utilised must be marinised Invest in cable specification and installation protection Invest in Electrical topology
Econnect Ltd Independent specialists in the grid integration of renewable energy...