Abstract: Embodiments of the present disclosure provide systems and methods for testing a device for grid interconnection standards. The method includes inputting a set of instructions to a device under test (DUT), where the instructions correspond to a firmware version to be tested by a variable AC source. The method includes transmitting a command signal to an inverter redundant controller (IRC) of the DUT, where the IRC operates at least one DC-AC inverter to attain a grid-tie state in response to receipt of the command signal. The method includes transmitting a set of values corresponding to parameters of the variable AC source configured to simulate an AC grid upon operating at least one DC-AC inverter in the grid-tie state. The method further includes accessing test output data of the DUT from measuring equipment and generating a test report based on responses of the DUT to a set of test waveforms.

Abstract: Systems and methods are provided for creating and operating a Direct Current (DC) micro-grid. A DC micro-grid may include power generators, energy storage devices, and loads coupled to a common DC bus. Power electronics devices may couple the power generators, energy storage devices, and loads to the common DC bus and provide power transfer.

Abstract: A method and apparatus for parallel operation of multiple power sources including one fuel cell power source. The apparatus includes a droop controller master communicatively connected to the multiple power sources and configured to measure a load demand for the multiple power sources, a first droop controller slave communicatively connected to the droop controller master and to a first fuel cell power source, the first droop controller configured to calculate a first droop profile for the first fuel cell power source, a second droop controller slave communicatively connected to the droop controller master and to a second power source, and a first inverter, electrically connected to the first fuel cell power source and communicatively connected to the first droop controller slave, and configured to output power according to a first droop profile.

Abstract: A method and apparatus for parallel operation of multiple power sources including one fuel cell power source. The apparatus includes a droop controller master communicatively connected to the multiple power sources and configured to measure a load demand for the multiple power sources, a first droop controller slave communicatively connected to the droop controller master and to a first fuel cell power source, the first droop controller configured to calculate a first droop profile for the first fuel cell power source, a second droop controller slave communicatively connected to the droop controller master and to a second power source, and a first inverter, electrically connected to the first fuel cell power source and communicatively connected to the first droop controller slave, and configured to output power according to a first droop profile.

Abstract: Systems, methods, and devices of the various embodiments enable parallel control of multiple uninterruptable power modules (“UPMs”) connecting multiple power sources to a bus in parallel. A UPM may be comprised of at least one controller coupled to at least one inverter, and the UPM may be configured to convert the DC voltage output from a DC source to an AC voltage, such as an AC voltage suitable for output to an AC bus. A UPM may receive a power sharing command and control its at least one inverter based at least in part on the received power sharing command to output a voltage to a bus.

Abstract: A method includes controlling multiple networked input-parallel/output-parallel inverters of a fuel cell system as a single inverter assembly by a master controller. A fuel cell system includes a plurality of fuel cell segments, a plurality of DC/DC converters and at least one DC/AC inverter, where an output of each of the plurality of the fuel cell segments is connected to a pair of DC/DC converters, and each of the pair DC/DC converters is connected to an opposite polarity bus being provided to the inverter.

Abstract: Systems, methods, and devices of the various embodiments enable parallel control of multiple uninterruptable power modules (“UPMs”) connecting multiple power sources to a bus in parallel. A UPM may be comprised of at least one controller coupled to at least one inverter, and the UPM may be configured to convert the DC voltage output from a DC source to an AC voltage, such as an AC voltage suitable for output to an AC bus. A UPM may receive a power sharing command and control its at least one inverter based at least in part on the received power sharing command to output a voltage to a bus.

Abstract: A method includes controlling multiple networked input-parallel/output-parallel inverters of a fuel cell system as a single inverter assembly by a master controller. A fuel cell system includes a plurality of fuel cell segments, a plurality of DC/DC converters and at least one DC/AC inverter, where an output of each of the plurality of the fuel cell segments is connected to a pair of DC/DC converters, and each of the pair DC/DC converters is connected to an opposite polarity bus being provided to the inverter.