Responding to the positive rate of change in fuel cell voltage during a power reduction transition

摘要

In the boost or back embodiment, at the power reduction transition of the fuel cell power plant, i) as energy dissipated in the resistive auxiliary load, or ii) as energy applied to the energy storage system (201) (battery), In response to the controller (185), the voltage limiter controller (200) extracts excess electrical energy produced by consumption of reactants in one or more time periods. The controller activates the voltage limiter controller in response to the positive time derivative of the voltage of the one or more fuel cells exceeding a predetermined limit value.