214 results about "Distributed power systems" patented technology

A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula / function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.

A distributed power system including multiple (DC) batteries each DC battery with positive and negative poles. Multiple power converters are coupled respectively to the DC batteries. Each power converter includes a first terminal, a second terminal, a third terminal and a fourth terminal. The first terminal is adapted for coupling to the positive pole. The second terminal is adapted for coupling to the negative pole. The power converter includes: (i) a control loop adapted for setting the voltage between or current through the first and second terminals, and (ii) a power conversion portion adapted to selectively either: convert power from said first and second terminals to said third and fourth terminals to discharge the battery connected thereto, or to convert power from the third and fourth terminals to the first and second terminals to charge the battery connected thereto. Each of the power converters is adapted for serial connection to at least one other power converter by connecting respectively the third and fourth terminals, thereby forming a serial string. A power controller is adapted for coupling to the serial string. The power controller includes a control part adapted to maintain current through or voltage across the serial string at a predetermined value.

A distributed power system including multiple DC power sources and multiple power modules. The power modules include inputs coupled respectively to the DC power sources and outputs coupled in series to form a serial string. An inverter is coupled to the serial string. The inverter converts power input from the serial string to output power. A signaling mechanism between the inverter and the power module is adapted for controlling operation of the power modules.

A distributed power system wherein a plurality of power converters are connected in parallel and share the power conversion load according to a prescribed function, but each power converter autonomously determines its share of power conversion. Each power converter operates according to its own power conversion formula / function, such that overall the parallel-connected converters share the power conversion load in a predetermined manner.

A method for maintaining reliability of a distributed power system including a power converter having input terminals and output terminals. Input power is received at the input terminals. The input power is converted to an output power at the output terminals. A temperature is measured in or in the environment of the power converter. A temperature signal is input responsive to the temperature. The power conversion is controlled by adjusting the input power based on the temperature signal. The power conversion of the input power to the output power may be controlled to maximize the input power by setting at the input terminals the input voltage or the input current according to predetermined criteria. One of the predetermined criteria is configured to reduce the input power based on the temperature signal responsive to the temperature. The adjustment of input power reduces the input voltage and / or input current thereby lowering the temperature of the power converter.

A distributed power system including multiple (DC) batteries each DC battery with positive and negative poles. Multiple power converters are coupled respectively to the DC batteries. Each power converter includes a first terminal, a second terminal, a third terminal and a fourth terminal. The first terminal is adapted for coupling to the positive pole. The second terminal is adapted for coupling to the negative pole. The power converter includes: (i) a control loop adapted for setting the voltage between or current through the first and second terminals, and (ii) a power conversion portion adapted to selectively either: convert power from said first and second terminals to said third and fourth terminals to discharge the battery connected thereto, or to convert power from the third and fourth terminals to the first and second terminals to charge the battery connected thereto. Each of the power converters is adapted for serial connection to at least one other power converter by connecting respectively the third and fourth terminals, thereby forming a serial string. A power controller is adapted for coupling to the serial string. The power controller includes a control part adapted to maintain current through or voltage across the serial string at a predetermined value.

An electric power load management system and method that uses a multiplicity of remote power supplies in a controlled manner such that the aggregate system has the capacity to offset critical power company peak electric demand periods thereby preventing severe and detrimental power shortages and interruptions.

A power harvesting system including multiple parallel-connected photovoltaic strings, each photovoltaic string includes a series-connection of photovoltaic panels. Multiple voltage-compensation circuits may be connected in series respectively with the photovoltaic strings. The voltage-compensation circuits may be configured to provide respective compensation voltages to the photovoltaic strings to maximize power harvested from the photovoltaic strings. The voltage-compensation circuits may be include respective inputs which may be connected to a source of power and respective outputs which may be connected in series with the photovoltaic strings.

A low cost mechanism that may be used to extend Ethernet capability to low end devices provides sufficient capacity to support Ethernet communications using only a single twisted pair medium. Because only a single twisted pair is used, the overall cost, complexity and size associated with the integrating Ethernet functionality into an end device is reduced. A distributed power system delivers power to a Data Terminal Equipment (DTE) device over the single twisted pair medium. With such an arrangement, Ethernet capability and power may be simultaneously delivered to low end devices at a reduced cost.

A distributed power system delivers DC power to a plurality of loads. The distributed power system includes a plurality of power converter modules having an associated DC to DC power conversion operation. Each of the modules includes a power regulation section for receiving a distributed input power from a distributed power line to generate a DC output by controlling the operation of the switching pulse generator. A processing section within the module interfaces with a data communications line for interfacing with the commands. The processing section is capable of operating in both a slave mode to receive commands from said data communication bus and a master mode for generating the commands. In at least one of the modules operating in the master mode, the processing section generates the commands for transmission over the data communications line to an address of one of the other modules. Processing sections in the slave mode of operation are configurable to monitor the operation of said power regulation section. Processing sections in the slave mode of operation are further able to negotiate among active slaves for assignment of a selected module as a new master responsive to the failure of a previous master.

A method and system is provided for optimizing the digital filter compensation coefficients of a digitally controlled switched mode power supply within a distributed power system. A power control system comprises at least one point-of-load (POL) regulator having a power conversion circuit adapted to convey power to a load and a digital controller coupled to the power conversion circuit though a feedback loop. The digital controller is adapted to provide a pulse width modulated control signal to the power switch responsive to a feedback measurement of an output of the power conversion circuit. The digital controller further comprises a digital filter having a transfer function defined by plural filter coefficients. The digital controller periodically stores a successive one of a plurality of samples of the feedback measurement. A serial data bus operatively connects the POL regulator to a system controller. The system controller retrieves each successive stored sample from the digital controller via the serial data bus. After retrieving a pre-determined number of the samples, the system controller calculates optimized filter coefficients for the digital filter and communicates the optimized filter coefficients to the digital controller. The digital controller thereafter uses the optimized filter coefficients in the digital filter.

A distributed power system for delivering DC power to a plurality of loads. A plurality of switching DC / DC converter modules are provided, each disposed proximate one of the loads, and each having associated therewith a switching pulse generator for generating switching pulses. A distributed power line distributes input power to each of the modules and a data communication line distributes command data between the modules, each of the modules uniquely addressable over the data communication line. A timing communication line is also provided for distributing timing information to each of the switching pulse generators. A master controller generates commands and communicates them to the data modules over the data communication line, the master controller operable to generate timing information over the timing communication line to each of the modules for controlling the associated switching pulse generator.

A distributed power system for delivering DC power to a plurality of loads. A plurality of power converter modules having associated therewith a DC / DC power conversion operation are provided, each disposed proximate an associated one of the loads, each of said converter modules having associated therewith a switching pulse generator for generating switching pulses. A distributed power line distributes input power to each of the modules. A data communication line distributes command data between the modules. Each of the modules includes a power regulation section for receiving the input power to generate a DC output by controlling the operation of the switching pulse generator. It also includes a processing section for interfacing with the data communication line for interfacing with the commands, the processing function operating in at least a slave mode to receive commands from the data communication bus. At least one of the modules operates in both a slave mode and a master mode. In the master mode, the processing section generates commands for transmission over the data communication line to an addressed one of the other of the modules and internally for use in the local slave mode of operation. The processing section in the slave mode of operation is operable to configure and monitor the operation of the power regulation section.

A power supply unit with improved charge / discharge operation for use in distributed power supply system or electric vehicles. The power supply unit includes a storage battery comprising a plurality of circuits connected in series. Each of the plurality of circuits includes a first cell group and a second cell group connected in parallel. The first cell group includes lithium secondary cells or electrical double layer capacitors. The second cell group utilizes an electrolyzable electrolytic solution, or is capable of generating recombinable gas. The second cell group may include lead cells, nickel hydrogen cells, nickel cadmium cells and / or fuel cells. A charger / discharger is provided for controlling charge / discharge of the storage battery adapted to charge the storage battery up to a voltage at which the electrolytic solution of the second cell group is electrolyzed, or to a voltage at which the generated gas is recombined.

The invention relates to a pneumoelectric hybrid power passenger vehicle control system and a control method of the pneumoelectric hybrid power passenger vehicle control system. The vehicle control system comprises a vehicle controller, a battery mechanism, a high-voltage power distribution box, a motor controller, a driving motor, an engine, a BSG motor or ISG motor, a speed reducer, an instrument mechanism, a gear mechanism, a braking mechanism, an accelerator mechanism, a power generator and a super capacitor, wherein the engine is in hybrid linkage with the driving motor, and the engine is driven and started by the BSG motor; the power generator is assembled at the power output end of the driving motor; the super capacitor is connected with the vehicle controller through a CAN bus. According to the vehicle control system, the high-speed-CAN-bus-based distributed power system control network with the vehicle controller as a main node is used, distribution of power of the motor is calculated through comprehensive vehicle information, the SOC, the temperature, the voltage and the current of a battery, the temperature information of the motor, and other information, and therefore the vehicle can be driven, braking energy feedback of the vehicle can be achieved, and the best driving performance can be acquired under allowance of the system.

A distributed power system, wherein a backup boost transformer is connected between a PFC transformer and a FE DC transformer. The backup boost transformer is also parallel connected with a diode. The backup boost transformer only operates in the sustaining time, if the first DC voltage drops gradually, the backup boost transformer will increase this first DC voltage and stabilize it at a preset voltage of the FE DC transformer. Therefore, the capacity of the storage capacitor of the PFC transformer can be fully utilized to have a longer sustaining time and decrease the variation range of the second DC voltage so as to enhance the efficiency and power density thereof.

A distributed power system delivers DC power to a plurality of loads. The distributed power system includes a plurality of power converter modules having an associated DC to DC power conversion operation. Each of the modules includes a power regulation section for receiving a distributed input power from a distributed power line to generate a DC output by controlling the operation of the switching pulse generator. A processing section within the module interfaces with a data communications line for interfacing with the commands. The processing section is capable of operating in both a slave mode to receive commands from said data communication bus and a master mode for generating the commands. In at least one of the modules operating in the master mode, the processing section generates the commands for transmission over the data communications line to an address of one of the other modules. Processing sections in the slave mode of operation are configurable to monitor the operation of said power regulation section. Processing sections in the slave mode of operation are further able to negotiate among active slaves for assignment of a selected module as a new master responsive to the failure of a previous master.

According to one aspect, embodiments of the invention provide a distributed power system comprising a DC bus, at least one DC UPS configured to provide DC power to the DC bus derived from at least one of input AC power and backup DC power such that a DC voltage on the DC bus is maintained at a nominal level, and at least one power module configured to monitor the DC voltage on the DC bus, to convert DC power from an energy storage device into regulated DC power, and to provide the regulated DC power to the DC bus in response to a determination that the DC voltage on the DC bus is less than a threshold level.

A multi-mode current-allocating device serves to control the DC to DC converter in each power supply device of a distributive power supply system. The multi-mode current-allocating device has an active current-sharing control circuit, a current-allocating bypass circuit, and a droop current sharing control circuit to be selectively operated under an active current-sharing mode, a current-allocating mode or a droop current-sharing mode according to the factors of the type of input power of each power supply device, the state of system load, and the system reliability so as to maintain the power supply efficiency of entire power supply system and reduce unnecessary power loss.

A power supply unit, a distributed power supply system and an electric vehicle loaded therewith, capable of charge / discharge operation are disclosed. A first cell group is connected in parallel to a second cell group in which the electrolytic solution can be electrolyzed or the generated gas can be recombined. A plurality of the parallel circuit pairs are connected in series, and the series circuit is connected with a charger / discharger to constitute the power supply unit. The charger / discharger charges the power supply unit up to a voltage at which the electrolytic solution of the second cell group is electrolyzed or the generated gas is recombined.

A monitoring system and method for monitoring performance of individual powers sources in a distributed power source system. A monitoring module is coupled to each of the power sources, or to each string of serially connected power sources, to monitor and collect data regarding current, voltage, temperature and other environmental factors at the power source. The collected data is transmitted over a power line to a central analysis station for analysis. Data collected from each source indicates malfunction or degradation at the source. Comparison of data collected from adjacent sources filters for environmental factors impacting neighboring sources such as cloudy days for a solar panel. Comparison of data collected from the same source at different times indicates soiling or degradation of the source with time or periodic events such as a moving shade from an adjacent building.

A power harvesting system including multiple parallel-connected photovoltaic strings, each photovoltaic string includes a series-connection of photovoltaic panels. Multiple voltage-compensation circuits may be connected in series respectively with the photovoltaic strings. The voltage-compensation circuits may be configured to provide respective compensation voltages to the photovoltaic strings to maximize power harvested from the photovoltaic strings. The voltage-compensation circuits may be include respective inputs which may be connected to a source of power and respective outputs which may be connected in series with the photovoltaic strings.

A distributed power system for delivering DC power to a plurality of loads. A plurality of power converter modules having associated therewith a DC / DC power conversion operation are provided, each disposed proximate an associated one of the loads, each of said converter modules having associated therewith a switching pulse generator for generating switching pulses. A distributed power line distributes input power to each of the modules. A data communication line distributes command data between the modules. Each of the modules includes a power regulation section for receiving the input power to generate a DC output by controlling the operation of the switching pulse generator. It also includes a processing section for interfacing with the data communication line for interfacing with the commands, the processing function operating in at least a slave mode to receive commands from the data communication bus. At least one of the modules operates in both a slave mode and a master mode. In the master mode, the processing section generates commands for transmission over the data communication line to an addressed one of the other of the modules and internally for use in the local slave mode of operation. The processing section in the slave mode of operation is operable to configure and monitor the operation of the power regulation section.

A method and system is provided for programming the digital filter compensation coefficients of a digitally controlled switched mode power supply within a distributed power system. The distributed power system comprises a plurality of point-of-load (POL) regulators each comprising at least one power switch adapted to convey power to a load and a digital controller adapted to control operation of the power switch responsive to a feedback measurement. The digital controller further comprises a digital filter having a transfer function defined by plural filter coefficients. A serial data bus operatively connects each of the plurality of POL regulators. A system controller is connected to the serial data bus and is adapted to communicate digital data to the plurality of POL regulators via the serial data bus. The digital data includes programming data for programming the plural filter coefficients. The system controller further comprises a user interface adapted to receive the programming data therefrom.