261results about "Dc source parallel operation" patented technology

Described is an operating machine (1) provided with: an electrical system (2), a plurality of user devices powered by the electrical system, including an electric motor (21, 22) set up to supply the power required by one or more other user devices, an electrical charge storage device (3) connected or connectable to the system (2) and arranged to power the user devices of the machine (1), a control element which can be operated by an operator to control the operation of one or more user devices and an electronic processing unit comprising a power management module (41) configured to adjust a power delivered to the user devices as a function of at least one safety threshold of a power which can be delivered by the storage device (3). At least one generator unit (26) connected or connectable to the electrical system (2) is made available and in addition the power management module (41) is configured to adjust the operation of the generator unit (26) so that it can power the storage device (3) and / or the user devices, through the system (2), based on a power requested by the user devices themselves.

This provides an electrical system for use in high-voltage DC multi-terminal switching stations. [Solution] The electrical system (300) comprises a first busbar (302a), a second busbar (302b), a resistor module (306) comprising one or more resistors and electrically coupled between the first busbar and the second busbar, a first switching element (307) electrically coupled between the first busbar and the second busbar and in series with the resistor module, and a plurality of power transmission media (304), wherein each power transmission media (304) of the plurality of power transmission media is electrically coupled to the first busbar via its respective second switching element (308), and each power transmission media of the plurality of power transmission media is electrically coupled to the second busbar via its respective third switching element (310).

This description relates to a power electrical circuit (100), comprising at least: - several power supply sources (102, 103); - an electrical interconnection bus (104) coupled to the power supply sources (102, 103); - switching devices (114 - 120) each comprising at least one thyristor (124, 128, 132, 136) and one field-effect transistor (122, 126, 130, 134) coupled in parallel with each other, and configured to couple the power supply sources (102, 103) in series or in parallel.

The application discloses a direct-current micro-grid voltage consistency control method and device, the method constructs a six-dimensional enhanced state space containing safety monitoring error, error history trend characteristics, multi-machine consistency characteristics, bus average voltage, voltage change rate and hysteresis action feedback; the six-dimensional state vector is input into a PPO intelligent agent to generate a voltage compensation correction signal; a hierarchical guidance reward function is introduced in the training stage to activate a three-level logic architecture composed of a survival layer, a transient layer and a steady-state layer, and a multi-stage pipeline processing is adopted for strategy iteration optimization; the compensation signal is superimposed to a bottom double closed-loop controller to realize accurate regulation of bus voltage. Through multi-dimensional space-time feature perception and hierarchical guidance, the application realizes rapid and smooth recovery and ultra-high precision stability of voltage in the load mutation and distributed power plug-and-play scene, and effectively solves the problem that safety, response speed and consistency accuracy are difficult to be considered in the control of a direct-current island micro-grid.

This application belongs to the field of power electronics and automatic control technology, and relates to a power supply smooth switching control method for suppressing DC bus voltage surges. It solves the problem of DC bus voltage surges caused by potential changes during primary / standby power supply switching, including: dynamically matching the standby power supply output to the primary power supply voltage and reserving a voltage difference margin through voltage closed-loop feedback; initiating switching when a primary power supply fault is detected or the bus voltage drop rate exceeds a threshold; utilizing controlled current injection into the MOSFET gate to bring it into the Miller plateau region and allowing it to remain in the linear operating region for a preset transition period; controlling the MOSFET drain-source equivalent resistance to continuously decrease according to an S-shaped function to absorb transient energy; and locking the fully conducting state to complete seamless switching when the drain-source voltage difference approaches zero. This method effectively eliminates high-frequency oscillations, achieves microsecond-level potential transitions, significantly improves system reliability and response speed, and is suitable for high-reliability power supply scenarios with stringent "zero-inductive switching" requirements.

A power apparatus applied in a solid state transformer structure includes an AC-to-DC conversion unit, a first DC bus, and a plurality of bi-directional DC conversion units. First sides of the bi-directional DC conversion units are coupled to the first DC bus. Second sides of the bi-directional DC conversion units are configured to form at least one second DC bus, and the number of the at least one second DC bus is a bus number. The bi-directional DC conversion units receive a bus voltage of the first DC bus and convert the bus voltage into at least one DC voltage, or the bi-directional DC conversion units receive at least one external DC voltage and convert the at least one external DC voltage into the bus voltage.

A power supply circuit for a battery management system of an energy storage system, an energy storage valve, and an energy storage station are described. When an energy storage submodule where the battery management system in the power supply circuit is located operates normally, a battery module of the energy storage submodule is selected to supply power to the battery management system. When the energy storage submodule where the battery management system is located is bypassed, energy storage submodules other than the energy storage submodule where the battery management system is located are selected to supply power to the battery management system, thereby mitigating the issue of over-discharge in the battery module of the bypassed energy storage submodule due to the continuous power consumption of the battery management system. All battery management systems are controlled to be powered by batteries of electric cabinets where the battery management systems are located.

The invention relates to a supply unit (20) for a DC load (50). The supply unit (20) comprises: - a DC terminal (21) for connecting to the DC load (50), - a first AC terminal (22) which is connected to a DC bus (26) via a first AC / DC converter (24), - a second AC terminal (23) which is designed for connecting to a second AC voltage (U2) and which is connected to the DC terminal (21) via a second AC / DC converter (25), - an energy storage device (29) which is connected to the DC bus (26) via a first DC / DC converter (27), - a second DC / DC converter (28) which connects the DC bus (26) to the DC terminal (21) and which can be operated so as to provide the current with respect to the DC terminal (21), and - a control unit (30) for controlling the supply unit (20). The supply unit is characterized in that - the first DC / DC converter (27) is designed in the form of a bidirectional DC / DC converter, and the control unit (30) is designed to operate the first DC / DC converter (27) so as to provide the voltage with respect to the DC bus (26), and - the first AC / DC converter (24) is designed in the form of a bidirectional AC / DC converter, and the control unit (30) is designed to operate the first AC / DC converter (24) so as to provide the voltage with respect to the first AC terminal (22). The invention additionally relates to an operating and starting method and to an electrolysis system comprising such a supply unit (20).

A power conversion device is provided. The power conversion device includes an external power terminal, a positive power terminal, a negative power terminal, a first output circuit, a second output circuit, a battery module, a first conversion circuit, and a second conversion circuit. The second output circuit is coupled in parallel with the first output circuit. The control switch is coupled between the external power terminal and the positive power terminal. The battery module is coupled between the positive power terminal and the negative power terminal. When an external power at the external power terminal is insufficient, the control switch is turned on, the battery module, the first conversion circuit, and the first output circuit form a first power loop during a first period, and the battery module and the second conversion circuit form a second power loop during the first period.

The present invention relates to a method for controlling an electrical system comprising a battery (2) with a distributed multilevel inverter architecture formed by current lines (LT1, LT2, LT3) made up of electrochemical modules connected in series and including H-bridges. The method relates to rapid DC charging. According to the invention, the method comprises controlling the electrochemical modules of the battery (2) so as to generate a DC voltage waveform across each current line (LT1, LT2, LT3) from a controlled selection of said series-connected modules, balancing the state of charge of at least one line with respect to another line among said three lines, configuring a set of power contactors so as to connect said three lines in parallel for connection to a charging interface (3), and parallel charging said three lines with DC voltage from the source. Figure 1.

Power Electrical Circuit This description relates to a power electrical circuit (100), comprising at least: - several power supply sources (102, 103); - an electrical interconnection bus (104) coupled to the power supply sources (102, 103); - switching devices (114–120) each comprising at least one thyristor (124, 128, 132, 136) and one field-effect transistor (122, 126, 130, 134) connected in parallel with each other, and configured to connect the power supply sources (102, 103) in series or in parallel. Figure for the abbreviation: Fig. 1

An energy storage system includes a plurality of energy storage nodes. The energy storage nodes include a battery storage element and a control subsystem to receive battery data from the battery storage element. The energy storage system further includes a power conversion system (PCS); and a control system coupled to the energy storage nodes and configured to receive or store a required power flow. The control subsystem, the control system, or both are configured to determine a state of charge about one or more of the energy storage nodes from the battery data. The control system is configured to dispatch the required power flow across the plurality of energy storage nodes based on a DC link balancing algorithm that is activated in response to the state of charge exceeding a high SOC threshold or being below a low SOC threshold.

This invention relates to the field of power Internet of Things and smart distribution network monitoring technology, and discloses a smart scheduling system for highway charging resources. The system includes: a dual-end source-side three-level rectification and busbar construction module, which constructs a bipolar three-wire DC transmission busbar between two service areas; a cross-regional transmission line impedance identification and status sensing module, which calculates the distributed inductance and capacitance parameters of long cables in real time; a terminal multi-port adaptive power routing module, which physically selects the voltage level to suit vehicle demand through a switch matrix; and a distributed parameter resonance locking and drive control module, which locks the operating frequency to the line's intrinsic resonant frequency and uses distributed parameters to achieve soft switching. This invention achieves long-distance energy exchange and voltage adaptive matching through cross-regional interconnection and multi-level routing, and transforms line parasitic parameters into resonant elements, reducing transmission losses.

To provide a relay device that relays between a power supply device and an electronic device, and that operates more appropriately even when a state changes to one in which power is not supplied from the power supply device. [Solution] The relay device has a conversion means that converts the voltage of a first power supplied from a power supply device via a first connection means to generate a second power to be output from a second connection means, a first holding means that stores power using the second power, and a control means. When the power supply device and the relay device are electrically connected and before the conversion means generates the second power, power using the first power supplied from the power supply device is supplied to the control means. When the electrical connection between the power supply device and the relay device is disconnected, power using the power held by the first holding means is supplied to the control means.

This invention belongs to the field of marine hybrid power system control and discloses an energy allocation optimization method and system for hierarchical control of a marine DC microgrid. The method includes: establishing a top-level optimized power allocation strategy model with the goal of minimizing diesel generator output and battery life loss; solving the top-level optimized power allocation strategy model using the second-generation non-dominated sorting genetic algorithm NSGA-II and the top-to-bottom solution distance method TOPSIS to obtain the power allocation scheme with optimal overall performance; introducing power regulation and voltage compensation in the intermediate layer, combined with droop control in the execution layer, to form an improved droop control, thereby achieving power allocation and current sharing control. This invention achieves optimal overall performance in marine power systems, including extended battery life, reduced fuel consumption, and efficient, energy-saving, and environmentally friendly operation.

The application belongs to the technical field of ship power system and energy management control, and discloses a hybrid power tugboat adaptive parameter mapping energy management method and system, which comprises a diesel generator unit, a power battery, a super capacitor, an energy management controller and a load. The method obtains a future load prediction sequence through a single load prediction module, extracts prediction mean value, peak value, ramp rate peak value and pulse index and the like characteristics, and generates an adaptive parameter set through a mapping function in combination with the power battery and the super capacitor state, which is used for mode determination, target setting and weight setting; diesel power base load power is generated in a slow cycle, and quadratic programming is solved in a fast cycle in a three-source collaborative and charging mode. The application realizes optimal power distribution of the battery and the super capacitor under multiple constraint conditions, makes the super capacitor preferentially bear the pulse and maintain the target energy band, and limits the battery peak value and the power change rate, so as to reduce operation cost and carbon emission.

The utility model belongs to the field of comprehensive security, relates to a combined direct current power supply equipment, including rack type casing, combined mainboard and direct current source module, the combined mainboard is installed in the inner bottom of rack type casing, and a plurality of direct current source modules are installed in the inside of rack type casing in matrix distribution type integration, each direct current source module includes ac input hot plug module, power module and direct current output hot plug module, and the ac input hot plug module is electrically connected with the power module, and the power module is electrically connected with the direct current output hot plug module. The direct current power supply equipment adopts rack type structure and installs a plurality of direct current source modules in the inside of rack type casing, and each direct current source module is installed in the standard machine room in the rack type casing, so that each electronic component runs in the suitable environment, which can help to increase the service life of direct current source module, improve the use performance, help the integrated and automatic inspection, make the maintenance and replacement more efficient and convenient.

The application belongs to the technical field of water disinfection, and specifically discloses a linkage type disinfection device based on wind-solar complementary power supply, which comprises a reaction tank, a monitoring module, a control module and a wind-solar complementary power supply module, the monitoring module is used for monitoring the residual chlorine value of water in real time; the control module selects a disinfection strategy according to the threshold interval to which the residual chlorine value belongs, controls the reaction tank to work based on the disinfection strategy, and estimates the total power demand of the next disinfection cycle; the wind-solar complementary power supply module receives the demand, dynamically selects a wind-solar direct supply mode or a wind-solar battery parallel supply mode to supply power to the system. The application realizes stable operation of the disinfection device based on wind-solar complementary power supply, ensures accurate and stable disinfection effect through matching control of residual chlorine feedback and solid medicament slow-release characteristics, and efficiently utilizes fluctuating renewable energy through intelligent linkage between the load and the power supply side, thereby improving the overall energy efficiency and reliability of the off-grid system.

A method for controlling the bus voltage of a photovoltaic system (100). The photovoltaic system (100) includes a DC / DC converter (104) and a DC / AC converter (106). The DC / DC converter (104), the DC / AC converter (106), and an energy storage battery (108) are connected via a bus. The DC / DC converter (104) is connected to a photovoltaic DC source and performs maximum power point tracking (MPPT) on the input power from the photovoltaic DC source. A load (110) connected to the DC / AC converter (106) has a load power. The energy storage battery (108) has a maximum charging power and a maximum discharging power. The method includes controlling the bus voltage in multiple discontinuous voltage ranges based on different results of a comparison between the photovoltaic maximum power and the load power, as well as the maximum charging power and the maximum discharging power. The multiple discontinuous voltage ranges correspond to different operating states of the inverter (120).

A kind of combined grid-friendly photovoltaic confluence system for 5G base station, including confluence unit, sensing unit, photovoltaic power generation system is accessed to direct current bus through confluence unit;Sensing unit collects distribution network voltage information and is transmitted to confluence unit in real time;Confluence unit according to distribution network voltage and direct current bus voltage, dynamically adjusts output power.Confluence unit includes: main power circuit, auxiliary power supply circuit, sampling circuit, drive circuit, control module, protection circuit, first wireless communication module.Sensing unit includes: single-chip microcomputer, wireless communication module, ac power grid power quality monitoring unit, auxiliary power supply.The utility model discloses a kind of combined grid-friendly photovoltaic confluence system for 5G base station, to be able to cope with 5G base station inside direct current bus overvoltage problem, simultaneously can according to the distribution network voltage of surrounding node, dynamically adjust power output, improve the stability of power supply system.

The application provides a PSM high-voltage power supply control system based on LabVIEW FPGA, relates to the technical field of high-voltage power supply control, and solves the technical problem that multiple PSM high-voltage power supplies cannot be independently and in parallel controlled with high precision in the prior art. The system specifically comprises: an upper computer, at least two local controllers connected with the upper computer, and at least one high-voltage power supply debugging device connected with the local controller. The upper computer comprises a first controller. At least two LabVIEW software for one-to-one control of the local controller are stored in the first controller. The local controller comprises a second controller and at least one FPGA module. The second controller is connected with the first controller and controls the FPGA module to generate a hardware timing signal for controlling the high-voltage power supply debugging device. The high-voltage power supply debugging device comprises a PSM module and a power module. The PSM module is used for turning on or off and adjusting an output voltage in response to the hardware timing signal. The power module is used for providing a power signal. The application is used for high-voltage power supply control.

Electronic device and method for managing power The invention relates to an electronic device comprising a power management integrated circuit (PMIC) for managing power from an energy harvester, comprising: a storage unit, an internal DC-DC converter embedded within the PMIC, optimized for a first, lower power range; and an external DC-DC converter controlled by the PMIC, optimized for a second, higher power range. Both DC-DC converters have an input and an output. According to the invention, both the outputs of the internal and external DC-DC converters are connected in parallel to the storage unit and the power paths of the external DC-DC converter are located outside of the PMIC. Further according to the invention, the PMIC is configured to automatically switch between the internal and external DC-DC converters as active converter to extract energy from the energy harvester or to allow them to run simultaneously to extract energy from the energy harvester based on the power level provided by the energy harvester.