Abstract: In accordance with one aspect of the present technique, a method is disclosed. The method includes identifying a first change in an excitation direction of a group of cells and determining a first set of characteristics of the group of cells corresponding to the first change. The method also includes identifying a second change in the excitation direction of the group of cells and determining a second set of characteristics of the group of cells corresponding to the second change. The second change in the excitation direction is opposite to the first change in the excitation direction. The method further includes determining a number of functional cells from the group of cells based on the first and the second set of characteristics.

Abstract: A converter system includes a power converter including a first bridge circuit including at least one first switching device. The power converter also includes a second bridge circuit magnetically coupled to the first bridge circuit. The second bridge circuit includes at least one second switching device. The converter system also includes a plurality of first conductors of opposing polarities coupled to the first bridge circuit. The converter system further includes a plurality of second conductors of opposing polarities. At least one second conductor of the plurality of second conductors is coupled to the second bridge circuit. The converter system also includes a third conductor coupled to one first conductor of the plurality of first conductors and coupled to the second bridge circuit.

Abstract: A battery system has a battery module including a number M of series-connected batteries. The battery system is further provided with a number N (1<N?M) of charge equalizers, each of which once connected to a battery, causes the battery to be charged and/or discharged to achieve charge equalization. A control device is configured to determine for each battery if it requires charge equalization based on a state of charge (SOC) of the battery, compare a number L of the batteries that require charge equalization and the number M, and based on the comparison result, cause the battery system to be shut down, or the one or more batteries that require charge equalization to be connected to corresponding charge equalizers. A selective switch module is used for connecting the one or more batteries that require charge equalization to corresponding charge equalizers, respectively.

Abstract: The present disclosure is directed to a system and method for controlling an energy storage device by more accurately detecting an end-of-discharge voltage of the energy storage device. More specifically, in one embodiment, the method includes determining an end-of-discharge voltage threshold for the energy storage device. Another step includes filtering the end-of-discharge voltage threshold via a filter. The method also includes adjusting a time constant of the filter based on at least one voltage-current condition. Still a further step includes comparing the filtered end-of-discharge voltage threshold and a terminal voltage of the energy storage device. Based on the comparison, the method includes determining a change of state of the energy storage device. Thus, the energy storage device can be controlled based on the change of state.

Abstract: A method implemented by at least one processor includes receiving a plurality of operating parameters of a pumping system, wherein the pumping system has a plurality of pump-units powered by a generator-unit. The operating parameters include a pump-unit parameter and a generator-unit parameter. The method also includes receiving reference data of the pumping system, wherein the reference data includes measurements from the pumping system representative of performance of the plurality of pump-units. The method also includes determining one or more health parameters corresponding to one or more pump-units based on the plurality of operating parameters and the reference data. The method further includes modifying one or more input parameters of the generator-unit based on the one or more health parameters for continued operation of the pumping system.

Abstract: A method implemented by at least one processor includes receiving a pressure profile to be generated by a pumping system, wherein the pumping system includes at least one pump-unit powered by at least one generator-unit. The method also includes receiving a pump-unit parameter from at least one pump-unit and a generator-unit parameter from at least one generator unit. The pump-unit parameter is representative of an operating parameter of the pump-unit. The generator-unit parameter is representative of an operating parameter of the at least one generator-unit. The method includes generating an operating set-point corresponding to the at least one generator-unit based on the pump-unit parameter and the generator-unit parameter, wherein the operating set-point is one of at least one operating set-point corresponding to the at least one generator-unit. The method also includes determining an input parameter for the at least one generator-unit based on the at least one operating set-point.

Abstract: An embodiment of the present invention relates to a vehicle. The vehicle includes an energy storage device and a traction motor electrically connected to the energy storage device. The traction motor is configured to convert electrical energy supplied by the energy storage device into a mechanical output to propel the vehicle. The vehicle also includes a vehicle connecting mechanism electrically coupled to the energy storage device and being configured for electrical coupling with a second vehicle connecting mechanism of a second vehicle to establish an electrical interface between the vehicle and the second vehicle. The electrical interface enables the transfer of electric power between the vehicle and the second vehicle.

Abstract: Systems and methods for controlling a hybrid power architecture to provide fuel or energy savings. Recharge time of an energy storage device (ESD) is reduced through the application of a controlled potential and ESD recharge time management over the life of the hybrid system through manipulation of the ESD charge state window of operation. Fuel or energy savings is achieved by controlling the partial-state-of-charge (PSOC) window of the ESD based on a recharge resistance profile of the ESD and by controlling a charging potential applied to the ESD based on a recharge current and/or the estimated recharge resistance profile of the ESD.

Abstract: An azimuthing drive system is provided for marine vessels. The azimuthing drive system includes a propulsion pod that houses a propulsor, which is configured to rotate about a first axis and to be driven by a first shaft generally orthogonal to the first axis. The propulsion pod is configured to swivel about the first shaft. The drive system also includes a gearbox connected to drive the first shaft, a diesel engine connected to drive the gearbox via a second shaft, and an electric motor connected to drive the first shaft via the gearbox or directly, whereby propulsion loads are shared between the diesel engine and the electric motor.

Abstract: A converterless motor-driven pump system includes an off-grid prime mover. The prime mover includes a rotational driveshaft that operates in response to a throttle or fuel input controller to control a rotation speed of the prime mover driveshaft. Operation of the throttle or fuel input controller is based on desired output characteristics of a pumping load. One or more electric power generators are driven by the off-grid prime mover to generate AC or DC power on an electrical bus shared by a plurality of variable speed electric motors. A plurality of pumps is connected to a common manifold shared by the plurality of pumps. The plurality of pumps is driven by the plurality of variable speed electric motors to generate a desired wellhead pressure or pumping load flow rate via the shared common manifold.

Abstract: A battery system has a battery module including a number M of series-connected batteries. The battery system is further provided with a number N (1<N?M) of charge equalizers, each of which once connected to a battery, causes the battery to be charged and/or discharged to achieve charge equalization. A control device is configured to determine for each battery if it requires charge equalization based on a state of charge (SOC) of the battery, compare a number L of the batteries that require charge equalization and the number M, and based on the comparison result, cause the battery system to be shut down, or the one or more batteries that require charge equalization to be connected to corresponding charge equalizers. A selective switch module is used for connecting the one or more batteries that require charge equalization to corresponding charge equalizers, respectively.

Abstract: A passive battery charging control system for charging a battery is devoid of active electrical components. The passive battery charging control system includes one or more passive electrical control elements configured to limit the charging state of the battery.

Abstract: An azimuthing drive system is provided for marine vessels. The azimuthing drive system includes a propulsion pod that houses a propulsor, which is configured to rotate about a first axis and to be driven by a first shaft generally orthogonal to the first axis. The propulsion pod is configured to swivel about the first shaft. The drive system also includes a gearbox connected to drive the first shaft, a diesel engine connected to drive the gearbox via a second shaft, and an electric motor connected to drive the first shaft via the gearbox or directly, whereby propulsion loads are shared between the diesel engine and the electric motor.

Abstract: In accordance with one aspect of the present technique, a method is disclosed. The method includes identifying a first change in an excitation direction of a group of cells and determining a first set of characteristics of the group of cells corresponding to the first change. The method also includes identifying a second change in the excitation direction of the group of cells and determining a second set of characteristics of the group of cells corresponding to the second change. The second change in the excitation direction is opposite to the first change in the excitation direction. The method further includes determining a number of functional cells from the group of cells based on the first and the second set of characteristics.

Abstract: A yaw backup system is provided. The yaw backup system includes an energy storage medium for storing auxiliary power. The yaw backup system also includes a yaw controller for coordinating delivery of power from the energy storage medium to a yaw motor for controlling a yaw angle of a wind turbine during grid loss conditions. The yaw controller executes the steps of receiving wind direction signals over time from a sensor, altering a tolerance level of a wind turbine based on changes in the wind direction signals over time and controlling delivery of power to the yaw motor from the auxiliary power of the energy storage medium based on the tolerance level to control the yaw angle for reducing a load on the wind turbine induced by wind.

Abstract: Systems and methods for transferring energy between segments of energy storage elements. At least one defined characteristics of each of two or more energy storage segments is monitored by at least one monitoring device, and a difference in at least one of the defined characteristics is determined between the two or more energy storage segments. Based on the determined difference, a control device commands a balancing circuit to transfer energy from at least one of the two or more energy storage segments to at least another of the two or more energy storage segments.

Abstract: Systems and methods for controlling a hybrid power architecture to provide fuel or energy savings. Recharge time of an energy storage device (ESD) is reduced through the application of a controlled potential and ESD recharge time management over the life of the hybrid system through manipulation of the ESD charge state window of operation. Fuel or energy savings is achieved by controlling the partial-state-of-charge (PSOC) window of the ESD based on a recharge resistance profile of the ESD and by controlling a charging potential applied to the ESD based on a recharge current and/or the estimated recharge resistance profile of the ESD.

Abstract: A system having multiple uninterruptable power supplies switchably coupled to a single energy storage device. The uninterruptable power supplies are switchably coupled to the single energy storage device (e.g., a bank or collection of energy storage elements) by at least one disconnect switch assembly that includes at least a first switch coupled to the first uninterruptable power supply and a second switch coupled to the second uninterruptable power supply.

Abstract: Systems and methods for controlling a hybrid power architecture to provide fuel or energy savings. Recharge time of an energy storage device (ESD) is reduced through the application of a controlled potential and ESD recharge time management over the life of the hybrid system through manipulation of the ESD charge state window of operation. Fuel or energy savings is achieved by controlling the partial-state-of-charge (PSOC) window of the ESD based on a recharge resistance profile of the ESD and by controlling a charging potential applied to the ESD based on a recharge current and/or the estimated recharge resistance profile of the ESD.

Abstract: A DC-AC converter includes a DC-DC converter providing bi-directional conversion between a first DC power signal and a second DC power signal, the first DC power signal being on a first DC bus and the second DC power signal being on a second DC bus. The DC-AC converter also includes an inverter providing bi-directional DC-AC conversion between a third DC power signal and a first AC power signals the third DC power signal being on the second DC bus and the first AC power signal being on a first AC bus.