Key Findings and High Value Learnings The physical causes of this incident, which played out in unique cascading steps, included 1) The fuel gas system pressure jump caused by the Air Liquide shutdown caused the shutdown of A Gas Turbine Generator 2) The inability to restart A Gas Turbine Generator associated with electrical circuit problems caused the second trip of the A Gas Turbine Generator (GTG23A). 3) The automatic air purge on the steam injection system caused a flameout on the C Turbine, and 4) The loss of instrument air due to system leakage/stuck check valve and faulty makeup air pressure control valve caused the shutdown of B Turbine. Refer to the graphic on the next page which shows the progression of the events with notations.
ConocoPhillips Company 3 Loss of Cogeneration Units 102210-1 #144138
