2241results about "Dc network circuit arrangements" patented technology

The invention relates to the technical field of charging piles, and provides a DC charging pile voltage stability optimization method and device and a storage medium, and the method comprises the steps: obtaining voltage sequence data of a DC output end of a charging pile, carrying out the segmentation statistics of the voltage sequence data, and obtaining an optimization adjustment matrix and a voltage compensation factor matrix; and performing dynamic adjustment on a preset direct current output control strategy of the charging pile based on the optimization adjustment matrix to obtain an adjusted control strategy parameter, performing compensation calculation on the adjusted control strategy parameter by using the voltage compensation factor matrix to obtain an optimization control instruction, and generating a dynamic voltage stabilization control signal according to the optimization control instruction. An output control strategy is dynamically adjusted by optimizing an adjustment matrix and a voltage compensation factor matrix, an efficient dynamic voltage stabilization control signal is generated, and the problems of response lag and insufficient prediction precision existing in the prior art when a complex voltage fluctuation mode is processed and a future voltage change trend is predicted are solved.

The invention belongs to the technical field of power distribution, and discloses a direct current transformer soft switch and a control method.The direct current transformer soft switch comprises a medium-voltage direct current bus and low-voltage direct current buses, the medium-voltage direct current bus is electrically connected with a modular multi-level multi-port direct current converter, and the modular multi-level multi-port direct current converter is electrically connected with a plurality of low-voltage direct current converters; the plurality of low-voltage direct-current converters are electrically connected with a low-voltage direct-current bus and are used for realizing bidirectional power transmission from medium-voltage direct current to low-voltage direct current; according to the method, the medium-voltage side inductance value is reduced, the medium-voltage side current ripple is enabled to pass zero, the M3DC operates in an approximate critical conduction mode, a constant valley current control strategy is adopted, the minimum value of the medium-voltage side inductance current is controlled to be constant under different working conditions, and then zero-voltage switching-on of a switching device in a wide operation range and zero-current switching-off of an anti-parallel diode are achieved.

The invention provides a control method of an intelligent fuse for DC cabinet protection and a related device. The method comprises the following steps: acquiring first current data and a first environment parameter set of a photovoltaic module in a preset first time period; determining a first protection threshold according to the first current data; acquiring second current data and a second environment parameter set of the photovoltaic module in a preset second time period; adjusting the first protection threshold according to the first environment parameter set and the second environment parameter set to obtain a second protection threshold; acquiring reference temperature data of the DC cabinet in a preset second time period; adjusting the second protection threshold according to the reference temperature data to obtain a third protection threshold; determining a current state according to the second current data and a third protection threshold value; and the intelligent fuse is controlled to perform circuit breaking processing according to the current state so as to ensure the operation safety of the DC cabinet. By dynamically and accurately adjusting the protection threshold, the safety of the DC cabinet can be improved.

A power conversion device includes a DC / DC conversion circuit and a DC / AC conversion circuit, the DC / DC conversion circuit is configured to connect to an energy storage unit and the DC / AC conversion circuit, the DC / AC conversion circuit includes a positive bus, a negative bus, and a neutral line, the DC / AC conversion circuit is configured to connect to an grid. An input voltage of the DC / DC conversion circuit is a voltage between the positive bus and a positive end of the energy storage unit, or a voltage between a positive end of the energy storage unit and the neutral line, or a voltage between the neutral line and a negative end of the energy storage unit, or a voltage between a negative end of the energy storage unit and the negative bus. An output voltage of the DC / DC conversion circuit is half of a direct current bus voltage.

A battery system is mounted on an eVTOL. The battery system includes a battery, an auxiliary battery, and a charge-related equipment. The battery supplies power to a drive target including a rotor blade of the eVTOL. The auxiliary battery charges the battery. The charge-related equipment controls charging from the auxiliary battery to the battery. The charge-related equipment has a function of electrically connecting or disconnecting the auxiliary battery and the battery. It is possible to reduce bias in ion concentration caused by discharge during a flight by temporarily charging the battery from the auxiliary battery and changing the direction of the current so as to reduce the temporary deterioration. Thus, the safety of the flight can be enhanced.

To provide a vehicle power supply system which decreases number of batteries without deteriorating redundancy of the power supply system.SOLUTION: A vehicle power supply system 1 comprises: a first power system 10 which supplies electric power from a first power source 41 to a first load 11 related to travel control of a vehicle V; and a second power system 20 which supplies electric power from a second power source 42 to a second load 21 related to the travel control of the vehicle V. The vehicle power supply system 1 includes: a system connection part SW3 which can connect and disconnect with the first power system 10 and the second power system 20; a second power connection part SW2 which can connect and disconnect with the second power source 42 and the second load 21; and a control part 211 which switches, when abnormality of the second power source 42 is detected, the second power connection part SW2 from a connection state to a cut-off state and switches the system connection part SW3 from a cut-off state to a connection state.SELECTED DRAWING: Figure 1

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.

An electrical energy recovery, storage, and distribution system that may be used in a vehicle. The system may include a supercapacitor configured to quickly store large amounts of energy. The system may also include multiple circuits operating at different voltage levels, such that an output voltage from the supercapacitor is useful over a larger voltage range and the system is more energy efficient.

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.

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 invention discloses a broadband impedance analysis method based on a network structure in a DC power distribution network, and relates to the technical field of broadband impedance, and the method comprises the steps: based on time-frequency domain impedance features, extracting frequency domain-time domain joint features through a lightweight convolutional neural network, and generating a fault detection result through a multi-layer perceptron classifier; on the basis of fault detection scores, data synchronization is achieved on node detection results through a distributed network protocol, weighted aggregation is conducted on frequency domain-time domain joint feature extraction weight parameters through a federated learning framework, and a power grid health report containing regional impedance deviation indexes is generated; according to the method, node data are synchronized and aggregated through a distributed network protocol and a federated learning framework, the power grid health report containing the regional impedance deviation index is generated, and the cooperative work capability of power grid systems at different geographic positions is greatly enhanced in the process.

The invention relates to the technical field of power electronics, and discloses a wall-mounted power supply and an intelligent monitoring system thereof, and the system comprises a cabinet body which is internally divided into a top AC input region, a middle region and a bottom battery output region; according to the two-way alternating current input circuit, an alternating current input 1 and an alternating current input 2 are respectively connected to a contactor through a circuit breaker to realize switching of a main power supply and a standby power supply through interlocking logic; the rectification and conversion circuit is used for converting AC input into DC48V through a rectification module to charge the lithium iron phosphate battery pack, and outputting the DC 48V to a DC bus through a boost module; an output power distribution circuit, wherein the DC bus is distributed to a plurality of load output circuits through a fuse; and a monitoring unit interface. Seamless switching of two-way alternating current input is achieved through mechanical and electrical interlocking design, zero-delay switching power supply of a main power supply and a standby power supply is ensured, the state of a battery is monitored in real time, a charging and discharging strategy is dynamically optimized, multiple protection mechanisms are integrated, power supply continuity is remarkably improved, the service life of the battery is prolonged, and stable operation requirements under complex working conditions are met.

A fault suppression control method based on a capacitive energy storage system comprises the steps that a DC / DC converter of the capacitive energy storage system is constructed, a voltage and current double-closed-loop control structure of the capacitive energy storage system in a charging mode and a discharging mode is constructed based on the DC / DC converter, and the voltage of an energy storage capacitor or a filter capacitor serves as an outer loop control variable; the current of the energy storage inductor is used as an inner loop control variable, turn-on and turn-off signals of a switching device are output through PWM modulation, and finally fault suppression control is achieved after current-limiting control parameter optimization. Energy absorption and release between the ship power system and the energy storage capacitor are realized by adopting the bidirectional DC / DC converter, fault current suppression during a fault is realized, meanwhile, the requirement on a current limiting reactor is reduced, the cost of system elements is reduced, and the influence of reactor installation on the system is avoided.

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.

To provide a load control device that suppresses a voltage rise on a DC bus even if a plurality of loads simultaneously generate regenerative power.SOLUTION: A DC power distribution system includes a DC bus, a plurality of regenerative loads connected to the DC bus, a storage battery connected to the DC bus via a DC / DC converter, and a load control device that performs regeneration control of the loads. The load control device includes a storage unit that stores regenerative power data of the loads and a preset upper limit charge power when charging the storage battery, and a control unit that controls the regeneration start time of each of the plurality of loads so that the upper limit charge power is not exceeded during the regenerative operation of the plurality of loads.SELECTED DRAWING: Figure 1

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.

A power supply circuit includes a first power supply circuit and a second power supply circuit. The first power supply circuit includes a first battery and a DC / DC converter, an input end of the DC / DC converter is connected to the first battery, and an output end of the DC / DC converter is configured to supply power to a battery management system (BMS) of the first battery, a controller of the DC / DC converter, and one or more first loads.

The present disclosure is directed to a system that employs fuel cell-based power generation for decentralized data centers that perform large, processing intensive tasks, such as training processes for large artificial intelligence models. The system utilizes various modules, such as energy storage systems, load banks, and other types of loads, to supplement power output by the fuel cells, as well as store any excess power generated by the fuel cell systems. As a result, swings in the power output by the fuel cell systems are minimized and the life of the fuel cell systems may be extended.

A direct current (DC) power system electrically connected to an alternating current (AC) grid and method are disclosed. One or more renewable generation or storage systems and one or more electrical charging stations may connect to a DC bus. The DC power system and method are configured to maintain stable operations on the DC bus, such as by distributed an automated control. In particular, distributed control may be implemented with the renewable generation systems (such as the PV systems) the storage systems (such as the battery systems), and within the electrical charging stations. This distributed control may work in combination with a centralized control so that the distributed control may control, in the short-term or in real-time, the power to or from the DC bus, whereas the central control may control thereafter.

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.

A lithium-iron-phosphate battery backup system for use with an electric actuator. The battery backup system includes a controller for detecting a power failure and supplying backup power to the actuator to close a valve or damper connected to the actuator. The system can also detect out of range environmental conditions, and defects to the battery backup system. The battery backup system also includes a system for boosting the current and voltage of the batteries in the system.

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.

An electronic device includes a first power management device configured to receive an input voltage, and output first voltages based on the input voltage, and at least one consumer which is configured to receive the first voltages from the first power management device, and operate based on the first voltages. The first power management device includes a switching regulator configured to generate a converted voltage from the input voltage, a first LDO regulator which is configured to generate a first output voltage from a first drop voltage generated by the converted voltage passed through a first PDN, a second LDO regulator and PDN, and a switching regulator which is configured to estimate a first dropout voltage of the first LDO regulator, calculate a voltage drop caused by the first PDN, and dynamically control the converted voltage based on estimated dropout voltages and calculated voltage drops caused by the PDNs.

The invention discloses an EV charging station medium-voltage DC power distribution architecture and a control method, and relates to the technical field of power electronics. The system comprises a medium-voltage direct-current bus and a coordination controller, the medium-voltage direct-current bus is in electrical cross connection with a modular multi-level multi-port direct-current converter, and a half-bridge sub-module of the modular multi-level multi-port direct-current converter is in electrical cross connection with a plurality of three-active-bridge converters. The modularized multi-level multi-port direct-current converter and the three-active-bridge converter carry out bidirectional power transmission. In the EV charging station powered by the medium-voltage direct-current bus, power conversion from medium-voltage direct current to multiple low-voltage direct currents is achieved, compared with a traditional low-voltage alternating-current or low-voltage direct-current power distribution architecture, the power conversion links can be reduced, the power density and the operation efficiency of the EV charging station power distribution system are improved, and the system reliability is improved. And power balance among the sub-modules can be realized under any power consumption condition, so that the flexibility and reliability of power distribution are improved.