1396results about "Dc network circuit arrangements" patented technology

A vehicle smart energy center includes an array of electronic fuses coupling a DC power bus to a plurality of loads and primary and supplemental electrical power sources. Electronic fuses self-diagnose health and report current, voltage and temperature data which is used by a smart energy center control module to manage the diagnostic, current, voltage and temperature data and electronic fuses for fault remediation whereby the vehicle remains operable through various smart energy center anomalies.

The invention relates to the technical field of ship power system control, in particular to a ship hybrid power management method based on shaft power generation and lithium battery collaboration, which comprises the following steps: acquiring load demand power of a ship power grid, output power of a shaft power generation system, a charge state of a lithium battery system and a rotating speed of a ship main engine in real time; adaptively deciding a current system operation mode; calculating a real-time power difference between the load demand power and the output power of the axle power generation system; generating a target charging and discharging power for the lithium battery system; a safe instruction charging and discharging power is obtained; and controlling the lithium battery system to execute the instruction charging and discharging power, and controlling the axle power generation system to operate according to the target of the current mode. Through precise power scheduling and adaptive switching of system operation modes, the ship power system is ensured to always operate in a state with optimal energy efficiency under different working conditions.

An electric power supply system includes: a first electric power supply part that utilizes a commercial electric power supply source; a second electric power supply part that utilizes a vehicle battery or other supply source; a third electric power supply part that utilizes a fuel cell; a fourth electric power supply part that utilizes photovoltaic electric power generation; a first electric power supply line for supplying electric power to an important appliance group; a second electric power supply line for supplying electric power to a general appliance group; and a distribution board. The distribution board includes: a first switch to switch over the first electric power supply part and the second electric power supply part at an input; a second switch to switch over the third electric power supply part and an output of the first switch at an input, the second switch having an output connected to the first electric power supply line; and a third switch to switch over the fourth electric power supply part and the output of the first switch at an input, the third switch having an output connected to the second electric power supply line.

The invention discloses a server power supply system, a server, a topological structure generation method and a storage medium, and relates to the technical field of power electronics. According to the invention, a high-voltage centralized conversion-medium and low-voltage distributed distribution two-stage architecture and a physical isolation design of the first direct-current bus and the second direct-current bus are adopted, and an adaptive mounting platform is provided for load nodes such as a super-capacitor node and an energy storage node depending on the second direct-current bus; the mounting number of the load nodes can be determined based on the power required by the load nodes and the voltage and through-flow level of the second direct current bus, and high-voltage power supply conversion and power supply of the load nodes are separated, so that physical isolation of high-voltage direct current of the first direct current bus and low-voltage direct current of the second direct current bus is realized. The high-voltage direct current input is ensured to be safely, efficiently and stably distributed to each load node in the server after being converted. The problems of potential safety hazard and reliability risk caused by direct access of the high-voltage direct current to the load node, poor mounting adaptability of the load node and the like in the prior art are solved.

The invention relates to the technical field of output sharing control, in particular to a multi-path power regulator control method and system, and the method comprises the following steps: collecting real-time data to establish a data queue, calculating a mean value and a standard deviation to generate a dynamic operation baseline, collecting the real-time data to establish the queue, calculating the mean value and the standard deviation to generate a dynamic baseline, the method comprises the following steps: calculating an adaptive over-current and open-phase alarm threshold based on a baseline, adding an external control quantity to obtain a total power demand, adjusting the number of cycles according to the stability of a load, reducing the number of active whole waves in proportion when the number exceeds the limit, and stopping a thyristor triggering instruction when the current or voltage abnormally and continuously reaches a preset count. According to the method, the self-adaptive threshold is calculated by establishing the dynamic operation base line in combination with the fluctuation amplitude and the sensitivity factor, current and voltage abnormity is specifically recognized, the total cycle number and the active whole wave number are adjusted in combination with the external power requirement and the load stability, single trigger angle control dependence is avoided, and power distribution balance and electric energy supply stability are achieved; and the equipment damage risk is reduced.

A battery booster for jumpstarting a vehicle having an external battery. The battery booster may include a processor, a set of terminal connectors, a power supply, and a power-management circuit. The set of terminal connectors may be configured to couple with the external battery or an engine that is electrically coupled with the external battery. The power supply may include a lithium battery configured to supply a starting current to jump start an engine. The external battery may have a first nominal voltage, while the lithium battery may have a second nominal voltage that is greater than the first nominal voltage. The power-management circuit operatively coupled with the at least one processor, wherein the at least one processor is configured to transfer power selectively between the external battery and the power supply. The processor is configured to perform a pre-charge function and / or a back-feed function via the power-management circuit, which may employ a pulse width modulation (PWM) driver.

A charging method comprises: in response to a charging request sent by a device, acquiring a state of charge of an energy storage apparatus, and comparing a charging power of the device with a first supply power of a first charging module corresponding to a charging gun connected to the device; in response to the first charging module not meeting a power supply requirement, determining power to be allocated based on the charging power and the first supply power; based on a second supply power of each second charging module and the power to be allocated, determining at least one second charging module that meets an allocation condition as a target charging module; in response to the state of charge being less than a preset threshold, disconnecting an energy storage switch to supply power to the first charging module and the target charging module through a power grid.

An electrolysis system has at least two electrolysis installations, a power supply source with a direct voltage output, and a central supply line connected to the direct voltage output. A direct current, at a first direct voltage, can be fed into the central supply line. The electrolysis installations are connected electrically in parallel to the central supply line. For a direct voltage supply from the public power grid a central voltage source converter converts an input-side alternating voltage into the output-side first direct voltage at a direct voltage output. Each electrolysis installation is connected via a DC / DC converter that converts the first direct voltage into a second direct voltage, parallel to the direct voltage output so that the second direct voltage drops across the electrolysis installation. Each of the DC / DC converters can be controlled and / or regulated for adapting a level of its second direct voltage.

A system and method includes suppling power to a utility grid with a plurality of fuel cell power plants, storing power generated by the plurality of fuel cell power plants with an energy storage system including one or more batteries, and maintaining a standby state-of-charge of the one or more batteries of the energy storage system via an energy management system. The system and method further includes generating a load request to at least one of the plurality of fuel cell power plants via the energy management system, comparing the load request to a predetermined limit; and if the load request exceeds the predetermined limit, commanding the at least one of the plurality of fuel cell power plants to ignore the load request for a predetermined amount of time.

An electrical power supply system for an aircraft comprising: a string of a plurality of connected smart battery modules, wherein the string is configured to provide a common output voltage; wherein each of the smart battery modules comprises, terminals for outputting an output voltage to a device external to the smart battery module; a battery assembly configured to supply a DC voltage between two poles; a power converter electrically connected to the terminals and the poles, and a controller operably coupled to the semiconductor stage and configured to control the semiconductor stage for regulating the voltage conversation of the DC voltage into the output voltage a control unit operably coupled to the controller of each smart battery module and configured to set an output voltage and / or current setpoint or limit for each controller individually or configured to set an output voltage and / or current setpoint or limit for all controllers collectively.

Systems and methods are described for powering a load, such as a data center, with renewable energy from a renewable energy source. When the renewable energy is greater than a demand of the load, excess renewable energy is used to power a hydrogen production device or charge a battery depending on whether or not the charge level of the battery satisfies an upper threshold charge level, respectively. When the renewable energy is less than the demand of the load and the charge level of the battery satisfies a lower threshold charge level, the load is powered with energy from the battery. When the renewable energy is less than the demand of the load and the charge level of the battery does not satisfy the lower threshold charge level, the load is powered and the battery is charged with energy generated by the hydrogen-based energy generator.

A power source assembly for an aeronautical vehicle includes a fuel cell module configured to provide a first direct current (DC) power output, a battery module configured to provide a second DC power output, a DC electric bus configured to provide a specified DC power output to a load, a multi-phase DC / DC converter including a plurality of converter units, and a controller operably coupled to the multi-phase DC / DC converter. The multi-phase DC / DC converter is configured to receive the first DC power output and the second DC power output and to provide the specified DC power output to the DC electric bus. The controller is configured to receive data indicative of the first DC power output and to control the plurality of converter units of the multi-phase DC / DC converter based on the received data to maintain the specified DC power output to the load.

A power supply control circuit that allows the power to be supplied from a power supply such as a sub-battery to a load for a longer period of time, in the event of a failure of a main power supply. The power supply control circuit (1) includes: a first circuit (2) connecting a main battery (52) and a sub-battery (53) via a DC / DC converter (20); a second circuit (3) connecting a main battery (52) and a load (54); and a third circuit (4) connecting the sub-battery (53) and a load (54) via a semiconductor switch (32). When the main battery (52) fails, the semiconductor switch (32) is turned ON to supply the power from the sub-battery (53) to the load (54), and the forward direction of a parasitic diode (32a) of the semiconductor switch (32) is a direction from the load (54) to the sub-battery (53). Furthermore, the DC / DC converter (20) boosts the voltage from the main battery (52) and supplies the boosted voltage to the sub-battery (53).

An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional vehicles at the same time. The EV charging station can include a power source, an electric reservoir receiving power from the power source, an AC to DC power converter for receiving AC power from the power source and converting the AC power to DC power for supplying DC power to the electric reservoir, an EV charger receiving DC power from the electric reservoir; and a first DC to DC converter receiving DC power from the electrical reservoir and converting the DC power to DC power suitable for charging the electrical vehicle.

An apparatus of a vehicle may comprise a first DC-DC converter configured to convert an input voltage into a first voltage, a first power distributor configured to supply the first voltage to at least one first electrical load, a second DC-DC converter configured to convert the input voltage into a second voltage, a second power distributor configured to supply the second voltage to at least one second electrical load, and a bidirectional converter configured to convert power between power associated with the first low-voltage and power associated with the second low-voltage based on a power conversion request signal generated by one power distributor and provide the converted power to the other power distributor. Each power distributor is configured to determine a spare current amount and transmit the power conversion request signal based on a failure in the other DC-DC converter.

The application discloses a photovoltaic system and a control method, comprising: at least two photovoltaic strings, a power taking circuit, a trip switch, a switching power supply and a controller; the at least two photovoltaic strings are connected in parallel; the trip switch is connected between the photovoltaic strings and an input end of a converter; the power taking circuit is used for taking power from at least one photovoltaic string to supply power to the switching power supply; the switching power supply is used for supplying power to the controller and the trip switch when the power taking circuit normally supplies power; and the controller is used for controlling the trip switch to be opened when there is a wiring fault in the at least two photovoltaic strings connected in parallel. The power taking circuit is specially arranged, the power taking circuit can directly take power from the photovoltaic string to supply power to the switching power supply. When the photovoltaic string connected with the power taking circuit is reversely connected, the switching power supply cannot work, the trip switch cannot be closed, and therefore the reversely connected photovoltaic string cannot be burnt.

An embodiment of this application provides an energy storage system and an energy storage system control method. The energy storage system includes N battery clusters and N-X first conversion units, where N is a positive integer greater than 1 and X is a positive integer less than N. A first side of each of N-X first conversion units is connected in series to a power transmission circuit of one of N-X first battery clusters among the N battery clusters, so as to combine with a corresponding first battery cluster to form a series branch circuit. The N-X series branch circuits are connected in parallel to X second battery clusters in the N battery clusters.

A method for power distribution control in a microgrid system integrating electricity, hydrogen, and ammonia, and a device are disclosed. The method includes: acquiring an output power of the photovoltaic generation system and a power of the DC load and determining a charge / discharge power of a hybrid energy storage system constituted the hydrogen storage system and the electrochemical energy storage system; and acquiring a state of charge (SOC) value of the electrochemical energy storage system and a state of health (SOH) value of the hydrogen storage system, and determining a power distribution control strategy according to the charge / discharge power of the hybrid energy storage system to adjust an operating status of the power distribution control strategy.

A power source assembly (200, 300, 400) for an aeronautical vehicle (100), includes a fuel cell module (202, 302, 312, 402, 412) configured to provide a first direct current (DC) power output, a battery module (204, 304, 314, 404, 414) configured to provide a second DC power output, a DC electric bus (206, 306, 316, 406, 416) configured to provide a specified DC power output to a load (212, 324, 422), a multi-phase DC / DC converter including a plurality of converter units (214), the multi-phase DC / DC converter configured to receive the first DC power output from the fuel cell module (202, 302, 312, 402, 412) and the second DC power output from the battery module (204, 304, 314, 404, 414) and to provide the specified DC power output to the DC electric bus (206, 306, 316, 406, 416), and a controller (210, 310, 320, 410, 420, 600) operably coupled to the multi-phase DC / DC converter and configured to receive data (602D) indicative of the first DC power output, the controller (210, 310, 320, 410, 420, 600) configured to control the plurality of converter units (214) of the multi-phase DC / DC converter based on the data (602D) indicative of the first DC power output to maintain the specified DC power output to the load (212, 324, 422).

Embodiments of the present application provide a power supply system. The power supply system comprises a first loop and a second loop. The first loop comprises a DC-DC conversion module and a first load in parallel, wherein a first end of the DC-DC conversion module and the first load in parallel is grounded. The second loop comprises a storage battery and a second load in parallel, wherein a first end of the storage battery and the second load in parallel is grounded. The power supply system further comprises a switching unit. The switching unit comprises a switch. The switch is coupled in series between a second end of the DC-DC conversion module and the first load in parallel and a second end of the storage battery and the second load in parallel. The switch is in a closed state by default to start a vehicle using the storage battery in the second loop.

Module-based energy systems are provided having multiple converter-source modules. The converter-source modules can each include an energy source and a converter. The systems can further include control circuitry for the modules. The modules can be arranged in various ways to provide single phase AC, multi-phase AC, and / or DC outputs. Each module can be independently monitored and controlled.

The present teachings relate to an electrical device comprising: a first electrical power input; a second electrical power input; an electrical power output; a switching circuit operable to route electrical power from the electrical power inputs to the electrical power output; the switching circuit comprising: a first switching element activable to facilitate delivery of electrical power from the first electrical power input to the electrical power output; and a second switching element activable to facilitate delivery of electrical power from the second electrical power input to the electrical power output; a controller operable to control the switching circuit to switch to the first electrical power input or the second electrical power input for selecting which of said electrical power inputs is to supply electrical power at the electrical power output; wherein the electrical device is operable to determine a timing sequence of switching between the first electrical power input and the second electrical power input. Related circuits, methods and software products are also disclosed.

The invention relates to a dual-mode seamless switching three-phase grid-connected inverter control system and method. The system comprises a GFL outer loop control module, a GFM outer loop control module, a current inner loop control module, a power grid impedance tracking module, a calculation processing module and a switching buffer control module. The power grid impedance tracking module is used for detecting and calculating power grid impedance Lg in real time; the calculation processing module analyzes the power grid impedance Lg and then generates a switching control instruction group, the switching buffer control module receives the switching control instruction group, and a plurality of change-over switches in the switching buffer control module change states according to instructions so as to select to start a GFL or GFM control path; according to the cooperative working mechanism, the system can automatically and smoothly switch between the following network type control strategy and the construction network type control strategy in real time according to the impedance state of the power grid, so that the adaptability and the operation stability of the three-phase grid-connected inverter under the wide-range power grid impedance change are remarkably improved.

The present invention is an unsupervised integrated method of instability detection and fault module positioning, including: acquiring a topological structure of a direct current (DC) microgrid and collecting electrical data of each node in the topological structure to construct a corresponding first enhancement dataset and a corresponding second enhancement dataset; constructing a fault type pool based on the topological structure; constructing a corresponding classification network based on a twinborn network framework; training the classification network using the prepared datasets to obtain a detection model; and inputting the electrical data of the DC microgrid to be detected to a detection model, to output whether the DC microgrid to be detected has system stability and a corresponding fault type. Further provided in the present invention is an unsupervised integrated device of instability detection and fault module positioning.

A power generation device is provided. The power generating device includes a photovoltaic panel configured to generate a first type of electrical power, a power converter electrically coupled to the photovoltaic panel and configured to convert the first type of electrical power to a second type of electrical power for transmission to a grid and / or load, and at least one energy storage device electrically coupled to the power converter, the at least one energy storage device configured to store electrical energy provided by the power converter. The power generating device further includes at least one heat management component and at least one back housing physically attached to the photovoltaic panel and defining a space between the photovoltaic panel and the at least one back housing. The power converter, the at least one energy storage device, and the at least one heat management component are positioned in the space.

A method for designing frequency filters, includes (a) setting up a simulation model of a power supply system with frequency filters; (b) determining initial set of filter parameters; (c) calculating the model using the filter parameters in time domain; (d) extracting safety-critical trajectories from the calculated model with underlying interference functions; (e) transforming safety-critical trajectories from time domain into frequency domain; (f) determining transfer functions in s-domain by system identification; (g) extracting pairs of residuals and poles based on transfer functions in s-domain; (h) determining energy loss and voltage stability values based on the residuals and poles; (i) varying the filter parameters; (j) repeating (c)-(h) with the filter parameters varied in step (i), until a termination criterion is reached; (k) after which, selecting, from a set of points with energy loss and voltage stability values determined in step (h), a point lying on a pareto-front of the set of points.

This invention provides a vehicle power supply device that can shorten the time required to start charging batteries connected in parallel. [Solution] The vehicle's power supply unit 1 can change the connection of the first battery 20A and the second battery 20B by a switching mechanism SC, so as to connect them in parallel or in series. When the control device 100 starts charging the batteries connected in parallel, it first detects the voltages of the first battery 20A and the second battery 20B using the first sensor 24A and the second sensor 24B. Next, the control device 100 charges capacitors C1 and C2 using the battery with the lower battery voltage among the first battery 20A and the second battery 20B, and then controls the switching mechanism SC to connect the first battery 20A and the second battery 20B in parallel.

At least one aspect of the present disclosure is directed to systems and methods for application specific battery container configurations. A controller can receive, from the microgrid, an indication of demand for power to complete operations within a worksite. The microgrid supplied with power from one or more of a plurality of energy containers in a first configuration. The controller can determine to identify a second configuration for the plurality of energy containers, based on the first configuration as compared to a one or more criteria. The controller can identify the second configuration of the plurality of energy containers, which satisfies the one or more criteria. The controller can modify a configuration of the plurality of energy containers to complete the operations within the worksite, from the first configuration to the second configuration.