806results about "Ac-dc network circuit arrangements" patented technology

The invention relates to the technical field of alternating-current and direct-current power distribution networks, in particular to an alternating-current and direct-current power distribution network SOP partition interconnection locating and sizing method and a related device, and the method comprises the steps: obtaining GIS multi-source data and power distribution network data of a target region; dividing a power supply area according to the GIS multi-source data and the power distribution network data to obtain a to-be-interconnected partition pair set; generating a high-quality interconnected partition pair set by using the to-be-interconnected partition pair set; constructing a target optimization model by taking the minimum total operation cost as an optimization target and taking a power balance constraint, a node voltage constraint, a branch capacity constraint, an SOP operation constraint, an SOP reactive power constraint and an SOP capacity constraint as constraint conditions; and inputting the high-quality interconnection partition pair set into the target optimization model, cooperatively solving the target optimization model by adopting a double-layer optimization algorithm to obtain the optimal position and the optimal capacity of the SOP, and solving the technical problem that the existing SOP locating and sizing method is difficult to meet the targets of engineering feasibility and optimal operation benefit at the same time.

The invention discloses an AC / DC power distribution network structure selection method comprising the following steps: obtaining typical scene data and candidate grid structure information, the typical scene data comprising scene load, distributed energy node information and a typical daily power curve; establishing a flexibility adjustment capability demand index system, and forming a multi-dimensional demand vector; calculating a flexibility evaluation index of each grid structure in a typical scene, and forming a capability vector; carrying out maximum and minimum normalization processing on the demand vector and the capability vector; and calculating the cosine similarity of the normalized capability vector and the demand vector as a matching degree, and sorting and selecting an optimal grid structure based on the matching degree. According to the method, multiple dimensions such as economical efficiency, new energy consumption rate and electric energy quality can be comprehensively considered, a scientific and visual decision basis is provided for complex AC / DC power distribution network architecture type selection, so that the problem that multiple targets are difficult to consider in a traditional method is solved, and the planning accuracy and efficiency are remarkably improved.

The invention discloses a light-diesel hybrid energy storage system and a control method thereof, and belongs to the field of microgrids. The system comprises a photovoltaic power generation unit, a diesel generator set, a hybrid energy storage unit (a storage battery and a super capacitor), an AC / DC bus, a bidirectional AC / DC converter and a system controller. The controller executes hybrid energy storage frequency division control (without sampling load power and distributing power through bus voltage), V / f control and nine multi-mode energy management strategies, and monitors parameters such as photovoltaic output, load power, energy storage charge state and the like in real time to realize intelligent mode switching. The super capacitor preferentially responds to the pulse load, and the voltage fluctuation ratio is smaller than or equal to 5%; the service life of the storage battery is prolonged in combination with energy storage charge state threshold management; photovoltaic maximum utilization enables the system efficiency to be greater than or equal to 90%, and the diesel oil consumption is obviously reduced. The method is suitable for power grid coverage difficulty scenes such as off-network communication base stations, remote sentries and emergency power supply stations, and has high reliability and maneuverability.

The invention discloses an intelligent switching control method and system for a double-voltage automobile generator, and relates to the technical field of automobile electrical control, and the method comprises the following steps: S001, constructing a frequency response baseline of an automobile power distribution network, and calibrating an inductance parameter of a wiring harness and a capacitance parameter of a filter based on frequency response measurement data; and generating an inherent frequency distribution diagram for reflecting the dynamic electrical characteristics. According to the method, the frequency response base line and the harmonic characteristic spectrum are constructed, so that accurate identification and dynamic prediction of the resonance risk are realized; avoiding the inherent frequency by adopting a multi-level control frequency planning strategy; virtual impedance and an active damping mechanism are introduced to improve the switching stability; and closed-loop optimization control is constructed in combination with residual signal feedback, and continuous convergence of the control performance is realized. According to the overall scheme, the stability, robustness and electromagnetic compatibility of the voltage switching process are improved, and safe operation of the double-voltage architecture under complex working conditions is guaranteed.

A vehicle having a vehicle power system is disclosed. The vehicle may include a battery and the vehicle power system configured to transfer power from the battery to an external accessory connected to the vehicle power system. The vehicle may further include a vehicle sensor configured to detect an actual energy usage of the vehicle power system. The vehicle may further include a processor configured to determine a type of external accessory connected to the vehicle power system and determine an expected energy usage associated with the external accessory based on the type. The processor may determine the actual energy usage of the vehicle power system or the external accessory based on inputs obtained from the vehicle sensor or an external accessory sensor. The processor may compare the actual energy usage with the expected energy usage, and perform an action based on the comparison.

The embodiment of the invention relates to the technical field of power systems and automation thereof, in particular to an alternating current and direct current hybrid power flow optimization method based on embedded direct current power flexible adjustment, and the method comprises the steps: building an embedded direct current adjustment model based on an embedded direct current power adjustment principle; constructing an AC / DC hybrid system steady-state power flow optimization model comprising a comprehensive evaluation index, a power system operation constraint and a DC operation constraint; an improved particle swarm algorithm is adopted to solve the steady-state power flow optimization model, the improved particle swarm algorithm updates a population through a chaos quasi-opposition strategy and optimizes an inertia weight and a learning factor, and a power flow optimization result is obtained; comparing different embedded direct-current power regulation modes, and verifying the effectiveness of the alternating-current and direct-current hybrid power flow optimization method; according to the method, accurate power flow optimization of the alternating-current and direct-current hybrid system in a new energy output fluctuation and load change scene is realized, and the economical efficiency, the safety and the stability of system operation are improved.

A dynamic coordination method for flexible direct current (DC) same-frequency control in conjunction with conventional DC single-sided frequency limit control (FLC) and voltage support. This method obtains the flexible DC power adjustment based on the sending-end grid frequency, receiving-end grid frequency, and the system frequency reference value. Subsequently, when the flexible DC power adjustment exceeds a preset limiting range and the system frequency deviation surpasses a preset frequency control dead-band, it outputs the conventional DC power adjustment based on the sending-end grid frequency and the system frequency reference value. Furthermore, based on the conventional DC power adjustment and the original reactive power reference value of the Voltage Source Converter (VSC), reactive power support is provided. This achieves the objectives of fully leveraging the rapid controllability of DC transmission systems, employing flexible DC same-frequency control for flexible DC and single-sided FLC for conventional DC, and swiftly balancing system active power deficiencies.

DC-to-DC converter for multiport charging system and method thereof. For example, a DC-to-DC converter for a multiport charging system, the multiport charging system including a plurality of output ports that correspond to a plurality of DC-to-DC converters respectively, the plurality of DC-to-DC converters including the DC-to-DC converter, the plurality of output ports including a first output port that corresponds to the DC-to-DC converter, the DC-to-DC converter including: a load detector configured to: detect whether the first output port that corresponds to the DC-to-DC converter is connected to any load; and among the plurality of output ports, determine a first number of one or more output ports that are connected to one or more loads respectively; and a generator configured to: if the first output port that corresponds to the DC-to-DC converter is connected to a load, generate a first voltage as an output voltage for the first output port.

The invention discloses a box-type transformer light storage integrated micro-grid system and method based on an intelligent fusion terminal. The system is characterized in that a photovoltaic power generation module is connected to a direct current side through a DC / DC converter; the energy storage module is connected to the direct current side through the bidirectional converter; the electric energy quality management module comprises a parallel converter and a series converter and is connected between a direct current side and an alternating current power grid side; the isolated island operation module is connected to an AC power grid side; the feeder protection module is connected to an alternating-current power grid side; the direct-current load is connected to the direct-current side; the alternating-current load is connected to an alternating-current power grid side; the intelligent fusion terminal is used for uniformly monitoring and scheduling the photovoltaic power generation module, the energy storage module, the electric energy quality management module, the isolated island operation module and the feeder line protection module; according to the method, continuous power supply can be guaranteed when the power grid breaks down, rapid recovery is achieved after the fault is removed, and it is guaranteed that the system has extremely high robustness and safety.

The utility model discloses an AC / DC hybrid micro-grid topological structure, which relates to the technical field of AC / DC hybrid micro-grid topological structures and comprises an AC / DC hybrid micro-grid and a data acquisition and monitoring module used for acquiring data of the AC / DC hybrid micro-grid. The alternating current and direct current hybrid micro-grid comprises an alternating current bus, a direct current bus and a contact current converter. The AC-DC hybrid micro-grid comprises an AC bus, a DC bus and a contact current converter. Selecting a mode of accessing the AC / DC hybrid micro-grid to the power distribution network; selecting the types of the AC bus and the DC bus; selecting the number of contact current converters; the economical efficiency and the reliability of the alternating-current and direct-current hybrid micro-grid topological structure can be improved; and the power supply of an important load in the AC / DC hybrid micro-grid can be ensured.

The invention discloses a DC bus voltage stabilization system and method for an AC / DC micro-grid. The method comprises the following steps: transmitting photovoltaic electric energy to a DC bus through a Boost converter of a photovoltaic power generation unit; a super capacitor energy storage branch and a storage battery energy storage branch of the hybrid energy storage unit are connected in parallel to a direct current bus through independent bidirectional Buck-Boost converters; the direct current bus electric energy is converted into alternating current electric energy through a grid-connected inverter of the alternating current inversion grid-connected unit; after the direct-current bus voltage, the voltage of each unit, the current and the energy storage charge state information are obtained through a sampling link of the special control unit, an adjusting instruction is generated through operation, the direct-current bus voltage is stably controlled, and the stability of the direct-current bus voltage is kept. Through hardware design optimization, the DC bus voltage anti-disturbance capability is significantly improved, and the service life of energy storage equipment is prolonged.

A power supply circuit for an x-ray production system, which has an inverter circuit with an output for connecting the inverter circuit with an x-ray source of the x-ray production system, includes a rectifier circuit including an input to connect the rectifier circuit with a power supply network, the rectifier circuit further including an output to connect to an input of the inverter circuit; and a backup circuit including a plurality of electrical energy storage cells, the plurality of electrical energy storage cells being connectable in series between the input of the inverter circuit and the output of the rectifier circuit.

The invention belongs to the technical field of power supply and distribution systems, and discloses a direct current power supply and distribution system and method of a nuclear power station facing a computing power data center, and the system comprises a direct current power supply and distribution architecture of a main power supply system, a medium-voltage direct current system and a low-voltage direct current system. Alternating current of a main power supply system is converted into medium-voltage direct current to be supplied to a medium-voltage direct current system through a first voltage conversion module, then the medium-voltage direct current is converted into low-voltage direct current to be supplied to a low-voltage direct current system through a second voltage conversion module, and the medium-voltage direct current system directly supplies power to a low-voltage system when a main power supply fails. And when the main power supply and the medium-voltage system both fail, the low-voltage system operates independently to meet the load requirement. By adopting the system, the equipment investment and the operation cost are obviously reduced, the electric energy transmission efficiency and the power supply reliability are improved, the potential safety hazard is eliminated, and the efficient cooperative power supply of the station power of the nuclear power station and the load of the data center is realized.

The invention relates to the technical field of energy supply control, in particular to a multi-mode energy supply control system and an optimization method thereof, and the system comprises an energy supply module, a main transmission channel, a main regulator, a plurality of parallel energy distribution branches, and a control regulation module. The energy distribution branch comprises a branch control node and an energy utilization outlet; the control regulation module periodically acquires energy demand data, calculates a global demand fluctuation index, and compares a threshold interval to generate an energy supply mode switching instruction; in the priority mode, the branch with the highest demand at present is dynamically appointed as a virtual main channel, and energy priority distribution is realized by adjusting equivalent impedance of the branch. According to the method, the global demand fluctuation index is used as a quantitative perceptron, a'balance-priority-emergency 'multi-stage mode is constructed, a dynamic virtual main channel and closed-loop feedback calibration are combined, conversion from static energy distribution to dynamic routing is achieved, and the system operation efficiency, the energy supply reliability, the power distribution network friend performance and the economical efficiency are improved.

Example systems and methods for charging multiple electric vehicles are described. In one implementation, a charger receives DC (direct current) power from at least one DC power source. A splitter is coupled to the charger and receives DC power from the charger. The splitter is capable of providing DC power to multiple electric vehicles. The splitter includes a switching matrix to deliver DC power from the charger to a first electric vehicle. The splitter also includes a control system that instructs the switching matrix to stop charging the first electric vehicle and begin charging a second electric vehicle based on at least one factor.

A power transfer device and system include an AC delivery path, a DC delivery path, and a circuit to combine the power from the AC delivery path and the DC delivery path. The AC delivery path includes a source bridge circuit that couples AC source to a source DC link. The source bridge has cross-connected switches to convert an AC current from the AC source to a pseudo DC (direct current) current, and the source DC link transfer the energy as a DC current. The DC delivery path includes a battery, a battery interconnection circuit, and a battery DC link to transfer energy from the battery as a DC current. Both the AC delivery path and the DC delivery path couple to a consumer bridge circuit having cross-connected switches to convert the DC current to an AC current for a microgrid.

The invention discloses a power supply control method and device for a power supply vehicle, and the method comprises the steps: determining a power parameter of an input power supply and a power utilization parameter corresponding to an externally-connected power utilization device through the power supply vehicle when the externally-connected input power supply is detected, and judging whether the power utilization parameter is matched with the power parameter through a control unit through the power supply vehicle, when it is judged that the power utilization parameters are matched with the power supply parameters, a power supply matched with the power supply parameters is output to the electric equipment through a power supply distribution unit, and when it is judged that the power utilization parameters are not matched with the power supply parameters, the input power supply is adjusted to be a target power supply matched with the power utilization parameters. And the target power supply is output to the electric equipment through the power supply distribution unit. Therefore, the technical problem that the power supply used by the electric engineering machinery is single can be solved, and the application scene of the electric engineering machinery is widened, so that the generality of the power supply vehicle is improved, and the earthwork operation efficiency of the electric engineering machinery is improved.

This invention discloses a comprehensive management method and system for base station power consumption, belonging to the field of base station power consumption. The method includes: topological mapping of the access relationships of AC / DC equipment within the base station to form a hierarchical power consumption association list; dynamic clustering parsing of the list to generate a time-series evolution chain reflecting state changes and remote control history; constructing a device differentiation identification model based on the time-series evolution chain, determining abnormal metering factors and outputting candidate correction events; labeling the corresponding areas of the candidate events as local anomalies, and generating a correction reference group by fusing multi-source information such as meter readings and sensor data; dynamically iteratively correcting the global metering results based on the correction reference group, and generating intelligent management instructions by combining the corrected load sharing ratio and branch authorization strategy. The system includes corresponding functional modules. This invention can systematically solve the problems of unclear base station power consumption topology, inaccurate metering, and extensive management, achieving high-precision metering and automated intelligent control.

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 application provides an MLPE device and a control method thereof, and a photovoltaic system. When determining that receiving of a heartbeat signal is continuously interrupted from a first time point to a second time point, the MLPE device considers that signal receiving is abnormal. If it is determined that an output current is less than a current threshold, it indicates that the MLPE device is in a scenario in which safe shutdown is required, and an output voltage is controlled to be less than a voltage threshold or output power is controlled to be less than a power threshold. If it is determined that the output current is greater than or equal to the current threshold, it indicates that the MLPE device is in a scenario in which a communication signal is unstable and that an output can be maintained. In this case, the output voltage is controlled to be greater than or equal to the voltage threshold or the output power is controlled to be greater than or equal to the power threshold from the second time point to a third time point, to prolong output time of the photovoltaic system, and increase effective hours of the photovoltaic system. If receiving of the heartbeat signal is continuously interrupted from the second time point to the third time point, it indicates that signal receiving is not recovered to normal, and the output voltage is controlled to be less than the voltage threshold or the output power is controlled to be less than the power threshold.

This power supply device is provided with: a power supply line that is disposed along a movement path of a plurality of moving bodies and that supplies power to the plurality of moving bodies; a power supply device connected to the power supply line and supplying power to the power supply line; and a control system that controls the power supply device. A control system is provided with: a moving body number information acquisition unit that acquires moving body number information indicating the number of moving bodies in a power supply region, which is a region in which a power supply line is disposed in a movement path; and a control execution unit that executes supply power variable control for reducing power supplied from the power supply device to the power supply line in accordance with a decrease in the number of moving bodies in the power supply area on the basis of the number of moving bodies information. Power supplied from the power supply device to the power supply line is increased in response to an increase in the number of moving bodies in the power supply area.

Processing plant (1) for the production of products and comprising: several machines (2), each comprising: a frame (4), several working elements (5) supported by the frame (4), and several actuator devices (6) supported by the frame (4), coupled to respective working elements (5) and using electrical energy; and at least one first electrical line (7) supplying energy to the machines (2); wherein the processing plant (1) is characterized in that it comprises several storage devices (9) which are each configured to store electrical energy, are coupled to a respective machine (2) and are configured to exchange electrical energy both with the first electrical line (7) and with the actuator devices (6) of the respective machine (2).

This invention relates to the field of microgrid control and discloses a method for regulating a highway service area microgrid based on distributed photovoltaic energy storage. The method includes the following steps: First, traffic flow data is collected to construct a traffic-energy potential field model, mapping discrete vehicles to a continuous potential field to predict net power demand. Second, a kinetic-thermal entropy mapping is constructed using vehicle kinetic energy characteristics, and battery thermal management feedforward control is executed before load arrival. Simultaneously, variational mode decomposition parameters are adaptively adjusted according to the potential field gradient to decompose the power command into high-frequency and mid-to-low-frequency components. The high-frequency components are absorbed by supercapacitors, while the mid-to-low-frequency components are collaboratively distributed among battery packs based on a virtual complex impedance model constructed using health status and temperature. This invention achieves proactive defense against impact loads and refined lifespan extension of energy storage through traffic-energy cross-domain coupling, significantly improving the voltage rigidity and operational stability of the microgrid under extreme conditions.

The invention provides a distributed predictive control method and system for an AC / DC hybrid microgrid, and relates to the field of microgrid control, and the method comprises the steps: obtaining a local value of a to-be-controlled device and an observation value of a neighbor device, the device being divided into two types: an AC device and a DC device; performing dynamic consistency observation by using the local value of the to-be-controlled equipment and the observation value of the neighbor equipment to obtain an observation value formula of the to-be-controlled equipment; constructing a prediction model and a cost function based on an observation value formula; the prediction model is optimized and solved with the minimum cost as the target, and an optimal control variable is obtained and used for distributed control over equipment; the method belongs to peer-to-peer control, has the advantages of being low in peer-to-peer control calculation amount and free of single-point failure risk, and can achieve overall optimization of the alternating-current and direct-current hybrid system compared with traditional peer-to-peer control.

This application provides a backup power supply system and a startup control method thereof. When an on / off-grid controller is powered off, a first control circuit provides a low level signal as an off-grid signal for a second control circuit of an inverter. In this way, when a voltage on a direct current side meets an inverter startup voltage value condition, the inverter preferentially performs an off-grid black start, and after the startup is complete, the inverter runs in off-grid mode and outputs an alternating current voltage to quickly supply power to a backup load. Before the inverter is started with off-grid mode and outputs the alternating current voltage, if it is detected that a voltage on an alternating current side meets a minimum off-grid output voltage value condition and a high level signal is received as an on-grid signal, the inverter may directly switch to on-grid startup, to complete quick startup. When a voltage of a power grid meets an undervoltage protection voltage value condition, the on / off-grid controller may directly start with on-grid mode and run in on-grid mode, turn on the first switch circuit, and send the high level signal as an on-grid signal, to quickly supply power to the backup load and provide a voltage for the alternating current side of the inverter.

The present disclosure relates to a method for controlling an internal power flow of an AC electrical system comprising an AC power source, an electrical component, and a power converter having a primary side wherein the primary side of the power converter is electrically coupled to the AC power source via the electrical component wherein the power converter comprises a plurality of cells, the plurality of cells are electrically coupled to each other in series at a primary side of the plurality of cells, where each of the plurality of cells includes an AC-to-DC converter having a first AC portion electrically coupled to the primary side of the plurality of cells or an AC-to-AC converter having a first AC portion electrically coupled to the primary side of the plurality of cells, the method comprises: obtaining at least one electrical parameter of the AC electrical system; generating a control signal for each of the plurality of cells based on the obtained at least one electrical parameter; and controlling an internal power flow of the AC electrical system by adjusting the voltages of the primary sides of the plurality of cells based on the generated control signal such that a voltage difference between the voltage of the AC power source and a sum of the voltages of the primary sides of the plurality of cells causes a controlled current to flow through the electrical component, adjusting the voltage of the primary side of the plurality of cells includes adjusting a magnitude and a phase of the voltage of the primary side of the plurality of cells by controlling a first AC portion of the AC-to-DC converter based on the generated control signal or by controlling the first AC portion of the AC-to-AC converter based on the generated control signal, and wherein, the sum of the amplitudes of the voltages of the primary sides of the plurality of cells is greater than the amplitude of the voltage of the AC power supply.

A system may include a power component, the power component including at least one device processor configured to: obtain load data, wherein the load data comprises a power characteristic associated with at least one of a high-load element or a low-load element, obtain a trained power management artificial intelligence (AI) and / or machine learning (ML) model, based at least on the load data and the trained power management Al and / or ML model, infer a direct current (DC) link voltage adjustment, wherein the DC link voltage adjustment is correlated with a predicted load cycle parameter; and cause the power component to alter a DC link voltage from an initial level to an adjusted level based on the DC link voltage adjustment.

The invention discloses a light-storage integrated power conversion system and a control method thereof, and belongs to the technical field of new energy control, the system comprises a photovoltaic power generation unit, and the output end of the photovoltaic power generation unit is connected with a DC bus through a DC-DC converter. And the input end of the energy storage unit is connected to the direct-current bus and is connected with the photovoltaic power generation unit through direct-current coupling. And the power conversion unit is respectively connected with the photovoltaic power generation unit and the energy storage unit through a direct-current bus, and is connected with a power grid or a load through an alternating-current bus. And the intelligent control unit is respectively connected with the photovoltaic power generation unit, the energy storage unit, the power conversion unit and the load. And a power grid or a micro-grid is accessed at the alternating current side through an alternating current network. Photovoltaic power generation and an energy storage system are combined through direct current coupling, the energy conversion link is reduced, the efficiency is improved, meanwhile, the networking function is added on the alternating current side, the optical storage all-in-one machine shows the voltage source characteristic externally, the optical storage all-in-one machine can be applied to a power grid and an off-grid system, and an efficient, stable and economical power solution is provided for different requirements.

A power supply circuit structure (100), a drying device (200), a power supply kit (1000) and a power supply method. The power supply circuit structure (100) is connected to a power supply (300) and supplies power to a radiation source (21), the power supply (300) provides an alternating current signal which changes periodically, the radiation source (21) can radiate light of a preset frequency band, and the power supply circuit structure (100) comprises a main control circuit (11) and a signal conduction circuit (12). The main control circuit (11) receives and detects the alternating current signal and generates a control signal with the same frequency as the alternating current signal according to the preset frequency band, and the control signal comprises a zero-amplitude part. The signal conduction circuit (12) receives the alternating current signal and the control signal and generates an output signal, the amplitude of the output signal is zero at the zero-amplitude part of the control signal, and the amplitude of the output signal corresponds to the amplitude of the alternating current signal at other parts of the control signal; and when the output signal is input, the radiation source (21) is used for radiating light of the preset frequency band.