Abstract: Systems and methods for microgrid-power distribution management when distributed energy resources transition between operating modes. The system includes a fuel cell system that generates DC power and a multi-mode inverter system that operates in one of the operating modes based on an availability status of grid, a site controller that receives electrical signal(s) facilitates the multi-mode inverter system to transition between the operating modes, generates a control signal based at least on an load operating input and transitioning of the multi-mode inverter system, a DC braking module that turns ON in response to receipt of the control signal, dissipates excess energy from the DC bus when the DC voltage value is greater than a threshold voltage value and energy storage module that turns ON in response to receipt of the control signal, supplies power to the DC bus, when the DC voltage value is less than the load operating input.

Abstract: Systems and methods for determining a site control architecture for controlling inverter(s) in a microgrid-based site are disclosed. The system includes a site controller, stamp controller(s), and inverter controller(s) communicatively coupled with each other. The site controller receives site operating input(s) associated with a microgrid-based site, determines a site control architecture for implementation on the microgrid-based site to stabilize an operation of the microgrid-based site, receives values corresponding to electrical parameter(s) associated with electrical point(s) in the microgrid-based site, transmits a control message to each of the stamp controller(s) and the inverter controller(s), and facilitates each of the stamp controller(s) and the inverter controller(s) to operate in one of at least two control modes for implementing the determined site control architecture, in response to the control message.

Abstract: Embodiments of the present disclosure provide control systems and methods to reduce wastage of energy associated with fuel cell systems. The method includes transmitting DC power from a plurality of fuel cells of a set of power modules to a centralized DC bus through a first set of DC-DC converters. The method includes operating a second set of DC-DC converters to provide an output DC power by boosting a voltage level of the DC power from the centralized DC bus and further operating a first set of DC-AC inverters to convert the DC power from the second set of DC-DC converters to AC power. The method includes transmitting the AC power from the first set of DC-AC inverters to a grid. The AC power is transmitted to the grid at substantially unity power factor due to combined effect of switching modulation and MPPT of the first set of DC-AC inverters.

Abstract: Embodiments of the present disclosure provide control systems and methods to reduce wastage of energy associated with fuel cell systems. The method includes transmitting DC power from a plurality of fuel cells of a set of power modules to a centralized DC bus through a first set of DC-DC converters. The method includes operating a second set of DC-DC converters to provide an output DC power by boosting a voltage level of the DC power from the centralized DC bus and further operating a first set of DC-AC inverters to convert the DC power from the second set of DC-DC converters to AC power. The method includes transmitting the AC power from the first set of DC-AC inverters to a grid. The AC power is transmitted to the grid at substantially unity power factor due to combined effect of switching modulation and MPPT of the first set of DC-AC inverters.

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.