A key North Sea operator was looking to upgrade a problematic and obsolete control system on one of its platform generators.
The generator was driven by a Rolls-Royce Avon 200 gas turbine and a EAS1-35 GEC power turbine.
The Generator which has been in service since 1978 provides base load and supplies the power for the main gas lift and export compressor.
Core were asked to provide the Control & Systems and Functional Safety expertise. The control system would need to be installed and commissioned within a planned TAR of 30 days.
The generator controls including the condition monitoring, consist of a GEC MK2 Governor Control, a Unit Control Panel (UCP), Excitation Control, Manual Synchronisation, Vibro-Meter Vibration monitoring and an Essential Supplies Controller as provided by GEC Turbines Ltd.
Additional control was implemented in solid state controllers from various suppliers.
The components were mostly obsolete and could only be replaced with refurbished spares or repaired and refitted. The exception was the excitation control which had new Brush controllers fitted.