A fuel cell vehicle provides improved space utilization and a desired intensity of voltage. The fuel cell vehicle includes a fuel cell, a junction box disposed on the fuel cell, and a power controller disposed between the fuel cell and the passenger compartment. The power controller boosts the output voltage of the fuel cell.

A fuel cell system includes: a solid oxide fuel cell generating power by using, as fuel, air supplied to a cathode and hydrogen-containing gas supplied to an anode; a combustor generating a combustion exhaust gas by combusting anode-off gas and cathode-off gas discharged from the anode and the cathode, respectively; a reformer steam-reforming a material to generate the hydrogen-containing gas supplied to the anode; a first temperature detector detecting temperatures of the combustion exhaust gas and/or the combustor; and a controller performing, if a temperature detected by the first temperature detector is lower than a preset first threshold while the combustor is forming flame, at least one of operations of: increasing a ratio of air consumed to the air supplied in the cathode; decreasing a ratio of hydrogen-containing gas consumed to the hydrogen-containing gas supplied in the anode; and decreasing an amount of water supplied to the reformer.

A power management system includes a plurality of power adjustment resources electrically connected to a microgrid, and a CEMS server that manages the plurality of power adjustment resources. The plurality of power adjustment resources include a plurality of FCEVs that supply electric power to the microgrid. Each of the plurality of FCEVs executes a refresh process that removes an oxide film formed on a catalyst electrode of an FC stack by causing the FC stack to generate electric power exceeding prescribed electric power. The CEMS server adjusts execution timings of the refresh process in the plurality of FCEVs during power supply to the microgrid, so as to respond to a request to adjust power supply and demand in the microgrid.

A system for operating a fuel cell includes a controller configured to derive an output limit value of the fuel cell through an interval average value corresponding to an average of output values of the fuel cell for a designated time and a cumulative average value corresponding to an average of the output values of the fuel cell until the current point in time after starting to operate the fuel cell, and to control operation of the fuel cell based on the derived output limit value.

A method for operating a fuel cell vehicle includes supplying electric power to a vehicle drive motor from at least one of a fuel cell and a battery. It is determined whether an electric potential of electric power output from the fuel cell is within a deterioration acceleration region in which the fuel cell is deteriorated due to a platinum oxidation-reduction reaction. The fuel cell is controlled in a deterioration suppressing mode when the electric potential is within the deterioration acceleration region in a state where the fuel cell and the battery supply electric power to the vehicle drive motor.

A method for addressing electrical grid frequency changes by a fuel cell system includes measuring, by a frequency sensor, a frequency of an electrical grid, determining that the frequency of the electrical grid differs from a normal frequency of the electrical grid by a threshold, determining, based at least in part on the measured frequency, an AC power setpoint bias, applying a magnitude limit, a rate-of-change limit, and a duration limit to the determined AC power setpoint bias to generate a limited power setpoint bias, generating a frequency adjusted power setpoint based on the limited power setpoint bias, and providing the frequency adjusted power setpoint to one or more control modules of the fuel cell system such that the fuel cell system adjusts a power output based on a difference between the measured frequency and the normal frequency.

The embodiments described and claimed herein are apparatus, systems, and methods for charging an electric vehicle at a stationary service station. In one embodiment, the service station includes a power generation component including at least one fuel cell, a fuel supply component for supplying fuel to the power generation component, a charging component including at least one customer charging station, and a control component for controlling and monitoring the other components and for providing accounting and billing functions.

Systems, methods, and devices which optimize fuel-cell stack airflow control are described. According to aspects of the present disclosure, actuation of at least one cathode-flow actuator is initialized to an initial state based on a desired oxygen flowrate to operate the fuel-cell stack in a voltage-controlled mode, a stack current produced by the fuel-cell stack is determined that corresponds to operation at the actuation of the cathode-flow actuators, a flowrate of oxygen exiting the fuel-cell stack is calculated based on the stack current, the flowrate of oxygen exiting the fuel-cell stack is compared to the desired oxygen flowrate exiting the fuel-cell stack, and actuation of at least one of the cathode-flow actuators is modified in response to the flowrate of oxygen being different from the desired oxygen flowrate. The modified actuation reduces the difference between the desired oxygen flowrate and the flowrate of oxygen exiting the fuel-cell stack.

Provided are: a power generation system that can generate electric power efficiently with a fuel cell; and a method for operating said power generation system. This power generation system comprises: a fuel cell including a plurality of unit fuel cell modules; a gas turbine; various lines for circulating fuel gas, air, discharged fuel gas, and discharged air between the fuel cell and the gas turbine; and a control device. The control device determines the number of said unit fuel cell modules to be operated on the basis of the required power generation amount, and operates the determined number of said unit fuel cell modules.

A fuel cell system according to one embodiment performs refresh control of an electrode catalyst of a fuel cell, by reducing a stack voltage as a voltage of the fuel cell to a refresh voltage at which the electrode catalyst is activated. The system includes the fuel cell that generates electric power by an electrochemical reaction using fuel gas and oxidation gas, a stack voltage sensor that sensors the stack voltage, and a controller that controls power of the fuel cell. When a high load demand that makes the stack voltage lower than a given voltage is made on the fuel cell, the controller causes the fuel cell to deliver power commensurate with the high load demand, and performs refresh control when the stack voltage becomes lower than the given voltage through the above control.