Solid oxide fuel cell auxiliary power unit reformate control

A method and system (10) for controlling reformate (102) delivered to an electrochemical cell (50) in an electric power system (10). The system (10) comprises: a reformate pressure sensor (22) disposed in the reformate (102) and configured to measure reformate pressure; a controllable valve (60) configured to control the flow of reformate (102) to the electrochemical cell (50); and a controller (30) coupled to the reformate pressure sensor (22) and the controllable valve (60). The controller (30) receives a reformate pressure signal (104) from the reformate pressure sensor (22), a controllable valve position signal (106) from the controllable valve (60), and transmits a controllable valve command (108) to the controllable valve (60).