Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: A single active bridge converter is provided. The single active bridge converter includes a transformer including a primary winding and a secondary winding, a primary side circuit electrically coupled to the primary winding and including an H bridge circuit, and a secondary side circuit electrically coupled to the secondary winding, the secondary side circuit including a switch configured to selectively short the transformer secondary winding.

Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: An uninterruptible power supply (UPS) and methods of operation are provided. The UPS includes a transformer configured to receive power from a utility. The transformer includes a primary winding, a secondary winding, and a tertiary winding. The UPS also includes a rectifier coupled to the secondary winding and an inverter coupled to an output of the rectifier, wherein a connection between the rectifier and the inverter defines a DC link. The inverter is configured to output a first regulated voltage configured to be provided to a load. The UPS further includes a voltage-boost converter coupled to the tertiary winding and is configured to output a second regulated voltage to be combined with the first regulated voltage.

Abstract: Apparatus and method for registering conditions of performance in a photovoltaic array are provided. A group of neighboring photovoltaic modules may be arranged to sense a reference performance for a respective photovoltaic module of the photovoltaic array. Each of the neighboring photovoltaic modules may have a transmitter to transmit data indicative of the reference performance. The respective photovoltaic module may have a receiver to receive the data transmitted by the group of neighboring photovoltaic modules. A processor in the respective photovoltaic module may be provided to compare data indicative of its respective performance relative to the data received from the group of neighboring photovoltaic modules. The processor may be configured to register a condition of the performance of the respective photovoltaic module based on a result of the data comparison.

Abstract: An uninterruptible power supply (UPS) and methods of operation are provided. The UPS includes a transformer configured to receive power from a utility. The transformer includes a primary winding, a secondary winding, and a tertiary winding. The UPS also includes a rectifier coupled to the secondary winding and an inverter coupled to an output of the rectifier, wherein a connection between the rectifier and the inverter defines a DC link. The inverter is configured to output a first regulated voltage configured to be provided to a load. The UPS further includes a voltage-boost converter coupled to the tertiary winding and is configured to output a second regulated voltage to be combined with the first regulated voltage.

Abstract: A power converter includes primary and secondary bridges, a transformer, and a controller configured to generate a switching mode map that correlates each of a plurality of switching modes to a respective set of value ranges of system parameters of the power converter. The sets of system parameter value ranges are contiguous and non-overlapping across the switching mode map, each of the plurality of switching modes includes gate trigger voltage timings for commuting at least one of the primary and secondary bridges. The controller is configured to obtain a plurality of measured system parameter values, select from the switching mode map one of the plurality of switching modes that correlates to the set of system parameter values containing the plurality of measured system parameter values, and adjust gate trigger voltage timings of at least one of the primary and secondary bridges, according to the selected switching mode.

Abstract: A single active bridge converter is provided. The single active bridge converter includes a transformer including a primary winding and a secondary winding, a primary side circuit electrically coupled to the primary winding and including an H bridge circuit, and a secondary side circuit electrically coupled to the secondary winding, the secondary side circuit including a switch configured to selectively short the transformer secondary winding.

Abstract: A power generation system includes a generator mechanically coupled to an engine to generate electrical power and a fault ride through system connected between the generator and a power grid. The fault ride through system includes a mechanical switch connected in parallel with a solid state switch and a controller for controlling the mechanical switch, the solid state switch and ignition of the engine in coordination.

Abstract: A system including a multi-level power converter is provided. The system also includes a plurality of DC link capacitors and a balancing circuit coupled to the multi-level power converter. The balancing circuit further includes two sets of interface branches. Each set includes a plurality of interface branches and a plurality of switching elements. The balancing circuit also includes a battery coupled to one or more inductors across the two sets of interface branches and a controller for controlling switching operations of the plurality of switching elements for modifying a voltage of the battery to balance voltages of the plurality of DC link capacitors.

Abstract: A power conversion device according to the aspects of the present technique is presented. The device includes a first converter and a second converter operatively coupled to the first converter. Moreover, the device includes a phase leg operatively coupled between the first converter, the second converter, where the phase leg includes a first unidirectional switch, a second unidirectional switch operatively coupled to the first unidirectional switch, and a first bidirectional switch, where a first end of the first bidirectional switch is operatively coupled to at least one of the first unidirectional switch and the second unidirectional switch.

Abstract: A power generation system includes a generator mechanically coupled to an engine to generate electrical power and a fault ride through system connected between the generator and a power grid. The fault ride through system includes a mechanical switch connected in parallel with a solid state switch and a resistor to absorb power from the generator during a grid fault condition. The mechanical switch and the solid state switch are controlled in coordination with the engine.

Abstract: An electric vehicle charging station is described. The charging station includes an input connector configured for coupling with an alternating current (AC) power source and an output connector configured for coupling with an electric vehicle. The charging station also includes a variable-output transformer comprising a primary side and a secondary side. The primary side is coupled to the input connector and the secondary side is coupled to the output connector and configured to be in selective electromagnetic communication with an energy storage device associated with the electric vehicle. The charging station also includes a controller coupled to the transformer and configured to determine a level of voltage to provide to the electric vehicle.

Abstract: A method and system for detecting an islanding condition in a grid is provided. The method comprises detecting a potential islanding condition in a grid; and, in response to the detected potential islanding condition, ramping up an amount of reactive power, active power, or a combination of active and reactive power that is generated from a power conversion system until the earlier of the power conversion system shutting down or a threshold condition being reached.

Abstract: Apparatus and method for registering conditions of performance in a photovoltaic array are provided. A group of neighboring photovoltaic modules may be arranged to sense a reference performance for a respective photovoltaic module of the photovoltaic array. Each of the neighboring photovoltaic modules may have a transmitter to transmit data indicative of the reference performance. The respective photovoltaic module may have a receiver to receive the data transmitted by the group of neighboring photovoltaic modules. A processor in the respective photovoltaic module may be provided to compare data indicative of its respective performance relative to the data received from the group of neighboring photovoltaic modules. The processor may be configured to register a condition of the performance of the respective photovoltaic module based on a result of the data comparison.

Abstract: A power generation system includes integrated photovoltaic (PV) panels. Each of the integrated PV panel includes photovoltaic cells, a junction coupler coupling the photovoltaic cells in series, in parallel, or in combinations thereof, output terminals, and a DC to AC converter coupled between the junction coupler and the output terminals. The DC to AC converter includes switching devices and the integrated PV panels are coupled in series at the respective output terminals. A controller is provided in the power generation system for generation switching command signals for the switching devices of the integrated PV panels to synthesize an output voltage of the power generation system.

Abstract: A medium voltage uninterruptible power supply system is presented. The system includes a first power converter coupled between a first bus and a second bus. Furthermore, a second power converter operatively coupled to the first power converter via the first bus and the second bus, where the second power converter includes at least three legs, where the at least three legs include a plurality of switching units, and where the plurality of switching units includes at least two semiconductor switches and an energy storage device. Additionally, system includes a direct current link coupled between the first bus and the second bus. Also, system includes an energy source coupled to the second power converter, the direct current link, or a combination thereof via one or more of a third power converter, a transformer, and a fourth power converter. Method of operating a medium voltage uninterruptible power supply system is also presented.