Abstract: An illustrative example controller for a fuel cell power plant includes at least one processor and memory associated with the processor. The processor is configured to control operation of the fuel cell power plant during an islanded mode of operation wherein the fuel cell power plant provides output power to a load. The processor is configured to control the operation of the fuel cell power plant in the islanded mode by adjusting a droop gain of the controller to change the output power of the fuel cell power plant in response to a change in demand from the load.

Abstract: An illustrative example controller for a fuel cell power plant includes at least one processor and memory associated with the processor. The processor is configured to control operation of the fuel cell power plant during an islanded mode of operation wherein the fuel cell power plant provides output power to a load. The processor is configured to control the operation of the fuel cell power plant in the islanded mode by adjusting a droop gain of the controller to change the output power of the fuel cell power plant in response to a change in demand from the load.

Abstract: An illustrative example fuel cell power plant includes a cell stack assembly, a single stage convertor configured to couple the cell stack assembly to a power network, and a controller that is configured to determine whether the fuel cell power plant has a DC voltage brownout condition during an islanded mode of operation. The controller dynamically adjusts the frequency droop gain of the power plant using an offset while satisfying at least three criteria of a set of criteria consisting of (i) avoiding overloading other fuel cell power plants of the power network, (ii) avoiding exceeding a maximum load step-up capability of the power network, (iii) avoiding exceeding a maximum load step-up capability of the fuel cell power plant, (iv) maintaining a system frequency within an acceptable frequency range, and (v) avoiding repeating the DC voltage brownout condition.

Abstract: An illustrative example fuel cell power plant includes a cell stack assembly, a single stage convertor configured to couple the cell stack assembly to a power network, and a controller that is configured to determine whether the fuel cell power plant has a DC voltage brownout condition during an islanded mode of operation. The controller dynamically adjusts the frequency droop gain of the power plant using an offset while satisfying at least three criteria of a set of criteria consisting of (i) avoiding overloading other fuel cell power plants of the power network, (ii) avoiding exceeding a maximum load step-up capability of the power network, (iii) avoiding exceeding a maximum load step-up capability of the fuel cell power plant, (iv) maintaining a system frequency within an acceptable frequency range, and (v) avoiding repeating the DC voltage brownout condition.