564 results about "Electrical network" patented technology

The present invention relates to the technical field of power systems and operations research. Disclosed are a method and system for coordinated source-grid-load-storage dispatch optimization during post-disaster restoration of a power distribution system. The method comprises: acquiring network topology constraint data for a power distribution system, wherein network topology constraints for the power distribution system comprise a virtual network topology constraint for the power distribution system, a geometric network topology constraint for the power distribution system, and an electrical network topology constraint for the power distribution system; on the basis of fault situations of a power source device, a load device and an energy storage device that are caused by a disaster, generating operational characteristic constraint data for devices in the power distribution system, wherein the operational characteristic constraint data for the devices in the power distribution system comprises operational characteristic constraints for the power source device, the load device and the energy storage device; and inputting the network topology constraint data for the power distribution system and the operational characteristic constraint data for the devices in the power distribution system into a pre-established coordinated source-grid-load-storage dispatch optimization model for power distribution systems in a post-disaster restoration scenario, such that a coordinated dispatch optimization result is output.

The present invention relates to a system for converting and transporting electrical energy in a turbomachine-propelled aircraft, said system including:at least a first rotary electric machine connected mechanically to the low-pressure shaft by means of a coupling device,a second rotary electric machine connected mechanically to the high-pressure shaft by means of an accessory gearbox, andsaid first electric power module and said second electric power module being connected electrically to an internal electrical network of the turbomachine,a generator coupled to the accessory gearbox and intended to supply an electrical network of the aircraft with electricity, anda control device for controlling start-up of the turbomachine by at least one rotary electric machine, for compensating for power consumed by the generator, and for implementing distribution between the power absorbed by the high-pressure shaft and the power absorbed by the low-pressure shaft.

A quantum-distributed microgrid controller employing a synchronization mechanism by leveraging the quantum properties of qubits. Since the distributed control problems of electrical networks such as microgrids can be modeled as networked differential equations, a proposed master equation is leveraged to construct the network of differential equations. By characterizing proper observables, expectation values of all the observers at all nodes will eventually get synchronized to a possibly time-varying target value and the synchronization rule follows the forced Kuramoto model. The quantum synchronization scheme is exploited to regulate AC microgrids' frequency and DC microgrids' voltage and guarantee precise power sharing. Due to the superposition feature of qubits, the QDC provides a foundation for introducing more enhanced quantum-secure distributed control for microgrids through randomizing the θ angle of qubits in the initialization step, which finally results in an unprecedented security for distributed control of AC and DC microgrids.

Disclosed is an intermediate connector device (1) for an electrical system (2) of a vehicle (3), wherein the intermediate connector device (1) comprises a housing (4), a first electrical system connection (5) provided on the housing (4), and a second electrical system connection (6) provided on the housing (4). A circuit (7) is arranged within the housing (4) which is configured to receive an electrical signal via the first electrical system connection (5), process the electrical signal, and provide the processed electrical signal to the second electrical system connection (6). Furthermore, a vehicle (3) is disclosed which has an electrical system (2) and a control unit (11) which is electrically connected to the electrical system (2). The electrical system (2) has an intermediate connector device (1) as described above. Furthermore, a method for operating an electrical system (2) in a vehicle (3) is disclosed. In addition, a data processing device comprising a processor configured to execute the method is disclosed. Finally, a computer program product comprising instructions that, when the program is executed by a processor, cause it to execute the method is disclosed.

The invention relates to a plug connector component (7) for a multi-part plug connector (8), having - a connection interface (10) for connecting to at least one other compatible plug connector component (9) of the multi-part plug connector (8); - a primary contact region (15) for forming at least part of a primary plug interface (16) for connecting to a corresponding mating plug connector (3, 3') of the multi-part plug connector (8); - a connection region (13) for connecting at least one electrical conductor (6); and - at least one electrical contact element (11), which can be connected to the electrical conductor (6) in the connection region (13) and which extends from the connection region (13) at least into the connection interface (10), the electrical contact element (11) being connectable to a compatible electrical contact element (12) of the compatible plug connector component (9) in the connection interface (10).

An electrode for an all-solid-state battery is provided. The electrode comprises granules including a core containing an active material, a first conductive material, and a binder; and a coating layer containing a solid electrolyte and a second conductive material, and disposed in contact with an outside of the core, wherein the first and second conductive materials have different sizes or shapes from each other. The granules form an excellent electrical network in an interior of the granules even in the form of all-solid-state, thereby improving battery performance when applied as the electrode for an all-solid-state battery.

A smart store communication interface (SSCI) squib of a countermeasure expendable. SSCI squib also includes a first electrical network. SSCI squib also includes a second electrical network that is isolated from the first electrical network. SSCI squib includes a fire pin contact that operably engages with the first electrical network and the second electrical network. The SSCI squib is configured to one of ignite a propellant loaded inside of a housing of the SSCI squib and communicate with a processor of the countermeasure expendable in response to receiving at least one electrical signal at the fire pin contact.

A high-power charging system and a method for charging electric vehicles EVs and / or plug-in hybrid vehicles PHEVs are described that allow for versatile charging one or more vehicles, subsequently or at the same time, with a simplified logistics, eventually in a modular way, and minimum set up work and while operating off-grid, i.e. without being connected to an AC electrical network. The system is an off-grid, integrated and prefabricated apparatus comprising plugs or connectors for vehicles, and means for connecting with sources of electricity from renewable energy, like photovoltaic panels and wind turbines organized in isles. The system also comprises a storage unit, provided with batteries and / or capacitors, a DC power unit supplying direct current DC to the plugs or connectors. The DC power unit is provided with one or more DC-DC converters that serve to adjust the voltage provided at said plugs or connectors. An internal distribution grid directly connects the sources of electricity from renewables to a charging controller that itself supplies the storage unit and the DC power unit. The storage unit instantly supplies the power necessary to meet the demand when the sources of electricity from renewables are insufficient. The system can support DC power charging levels two, three and four.

The invention discloses a method and a device for automatically examining correctness of a circuit schematic diagram differential network. According to the scheme, the method comprises the following steps: inputting a circuit schematic diagram in an EDIF200 standard format, analyzing a schematic diagram file, obtaining chip pins, resistance-capacitance-inductance and related electrical network data, and storing the data to a chip device information matrix PartU and a non-chip device information matrix Partmer. Thirdly, screening differential pins according to a set standard, and storing the differential pins into a matrix Difpin; then, splitting the matrix Difpin into a matrix Difpin1 and a matrix Difpin2, traversing to obtain a differential path, and storing the differential path into a matrix DiffNet1 and a matrix DiffNet2; afterwards, based on the matrix DiffNet1 and the matrix DiffNet2, the correctness and naming normalization of the differential network are examined, incorrect paths are stored in a Diffnocor matrix, and non-standard named paths are stored in the Diffnocor matrix. Finally, the paths in the two matrixes are converted into character strings, text description is added, and an inspection result is output.

A electrical power system comprises: an electrical machine operable to output AC; a DC electrical network; a power electronics converter connected between the AC output of the electrical machine and the DC electrical network and including a plurality of transistors and associated diodes connected in parallel with the transistors; and a controller configured to control switching of the transistors of the converter so that, during normal operation of the electrical power system, the converter rectifies the AC output of the electrical machine to supply the DC electrical network with DC electrical power. The controller is further configured, responsive to a determination to the effect there is a fault in the DC electrical network, to control a voltage source, to inject a voltage to bias the diodes of the converter, and to control the switching of the transistors to control a level of current supplied to the faulted DC electrical network.

The present invention belongs to the technical field of line loss assessment, and relates to a method for assessing line loss of power quality in a substation with incomplete measurement data. The method includes: decoupling unbalanced power; determining reactive line loss power factor, unbalanced line loss power factor and harmonic line loss power factor, and determining the expression of the fundamental positive sequence active line loss power factor of each branch; determining the substation topology matrix corresponding to the substation that needs to perform unbalanced line loss assessment; calculating the current vectors of all branches according to the substation topology matrix; based on the measurement and decomposition of the current vectors of the branches in the substation, solving the fundamental positive sequence active line loss power factor of each branch in the substation and calculating the reactive line loss power factor, unbalanced line loss power factor and harmonic line loss power factor. Based on electrical network analysis and Kirchhoff's current law, the present invention uses the measurement data of some branches to realize the calculation and evaluation of the power quality line loss power factor of all branches in the substation.

The invention discloses a high-efficiency converter for adjusting the voltage of a power grid, and belongs to the technical field of power electronics. The converter comprises a first voltage regulation circuit, a second voltage regulation circuit, a filter circuit, a detection circuit and a control circuit. By detecting the amplitude difference between the power grid voltage and the load voltage, the control circuit automatically switches the Buck working mode or the Boost working mode, and stable alternating current output in a wide input voltage range is achieved. The invention has the advantages of compact structure, high efficiency, fast response, small harmonic wave and the like, and is suitable for industrial and civil occasions with large-range fluctuation and frequent power grid voltage.

The invention discloses a dual-optical-path keyboard with a silica gel elastic piece capable of shielding light. The dual-optical-path keyboard comprises the silica gel elastic piece and an FPC, and a plurality of chips are arranged on the FPC. And the chip is one of a full color control chip, a full load color control chip, a confluence color control chip, a load color control chip and a fantasy color control chip. The light-sensitive element is located under the silica gel elastic piece, the silica gel elastic piece is made of a light-transmitting color material and a light-shading color material, the GRB in the chip is an emission light source, one path of the GRB directly provides illumination for a key cap character, the other path of the GRB directly penetrates through the silica gel elastic piece to provide the emission light source for the light-sensitive element under the silica gel elastic piece, and one light source has two purposes. The invention provides the optical switch keyboard with serial-parallel hot standby, the communication circuit is simple, the reliability is high, a single single-sided FPC (Flexible Printed Circuit) can realize full-key no-impact and GRB indication, a keyboard MCU (Microprogrammed Control Unit) can communicate with the keyboard through a maximum 5PIN electrical network, and the optical switch keyboard can be widely applied to notebook computer production.

The invention relates to an electromagnetic transient modeling and simulation method of a permanent magnet synchronous generator, which can reflect various types of internal faults, and the method comprises the following steps: 1, according to different fault types, establishing mathematical models of the permanent magnet synchronous generator in different fault states, and according to the different fault types, establishing a mathematical model of the permanent magnet synchronous generator in the different fault states, according to the different fault types, establishing a mathematical model of the permanent magnet synchronous generator in the different fault states, and according to the mathematical model, establishing a mathematical model of the permanent magnet synchronous generator in the different fault states, and according to the mathematical model, establishing a mathematical model of the permanent magnet synchronous generator in the different fault states, and establishing a mathematical model of the permanent magnet synchronous generator in the different fault states; 2, focusing matrix elements required to be updated according to fault characteristics, and selecting current or flux linkage as a state variable; 3, performing discretization equivalence on the mathematical equation of the permanent magnet synchronous generator by using a backward Euler integral method, integrating two state variables, unifying the model to obtain an equivalent circuit equation, and constructing an equivalent circuit of the permanent magnet synchronous generator; 4, the equivalent circuit of the permanent magnet synchronous generator is connected with an external electrical network, and the equivalent model carries out node admittance matrix iteration solution on the whole circuit based on an EMTDC solver; and updating other concerned electrical information such as the stator current, the rotor current, the electromagnetic torque, the rotating speed, the rotor angle and the like until the simulation is finished.

The invention provides a measurement completion method, device and equipment serving panoramic transparency of a power distribution network, and the method comprises the steps: constructing a power distribution network graph model integrating a power grid topological structure, electrical parameters and measurement configuration information, carrying out bad data identification and cleaning on the original measurement data uploaded by the acquisition terminal to obtain a real-time measurement data set; for lines, buses, distribution transformers and circuit breakers in a power distribution network, missing electrical measurement values are obtained through classification certainty deduction calculation by using electrical network topology constraints, conservation laws and forward-back substitution load flow calculation so as to realize measurement completion; and performing quality evaluation on the complemented measurement data, and performing closed-loop feedback optimization based on an evaluation result. According to the scheme, high-precision complementation of the missing electrical quantity can be realized by depending on the measurement data acquired in real time, and the data storage and computing resource overhead is reduced.

The invention discloses a power distribution network line loss intelligent sensing and tracing decision-making method and system, and belongs to the technical field of power distribution network operation and management.The power distribution network line loss intelligent sensing and tracing decision-making method comprises the steps that multi-source heterogeneous data are connected, timestamp interpolation is carried out, and data are obtained; associating the position and GIS coordinates of the electrical equipment in the electrical network through the unique identifier of the electrical equipment, and outputting a standardized data mart; a dynamic line loss separation engine calculates total loss according to the standardized data mart and a photovoltaic back-feeding compensation item, dynamically corrects technical line loss through a photovoltaic output coefficient, subdivides a line loss component by using a K-means algorithm, and outputs a line loss component matrix; and calculating a feature vector and inputting the feature vector into the traceability decision tree to trace the line loss abnormal root cause. Time sequence and space dislocation of multi-source heterogeneous data is eliminated through timestamp intelligent interpolation and equipment ID two-dimensional mapping fusion data, accurate decoupling of management line loss and technical line loss is achieved through a corrected dynamic line loss separation engine, and the misjudgment rate of a new energy scene is reduced through a traceability decision tree.

A computer-implemented method (100) for refining the risk α that an uncertain quantity x in an industrial process (1a) and / or electrical network (1b) will exceed a given threshold value x, the method comprising the steps of: • providing (110) an initial desired value a* of the risk α; • providing (120) a prediction model (2) that is configured to predict, from values x t ,x t-1 ,..., x t-k of the quantity x, future values x t+1 ,..., x t+1 of this quantity x; • providing (130) a history x # of measured past values x t , x t-1 ,..., x t-k of the quantity x; • determining (140), for this history x # , differences between values x t , x t-1 ,..., x t-k predicted by the prediction model and the measured past values x t , x t-1 ,..., x t-k as residuals (3); • determining (150) an estimated probability density function (4) of these residuals (3); • determining (160), based at least in part on the history x # , and / or on the residuals (3), a confidence set 2) to which the estimated probability density function (4) belongs, said confidence set D comprising probability density functions that would be equally plausible given the history x # and / or the residuals (3); and • determining (170), based at least in part on the dimension of the confidence set D, a new risk α' such that, if the risk a that x exceeds x is less than α', it is guaranteed that this risk α will not exceed the initial desired value α* even if the residuals should behave according to any one of the probability density functions in the confidence set D instead of the estimated probability density function (4).

An electrical power system 10 and a method 300 of controlling an electrical power system 10 are provided. The electrical power system 10 comprises a DC:DC power converter 100 connected between a DC power source 11 and a DC electrical network 12. The DC electrical network 12 comprises at least a first zone Z1 for powering a first group of one or more electrical loads 12La-b, a second zone Z2 for powering a second group of one or more electrical loads 12Lc-d, a first controllable circuit breaker X1, and a second controllable circuit breaker X2. The electrical power system 10 further comprises a control system 150 configured to: in response to determining there is a fault in the DC electrical network 12: control a switching operation of a plurality of transistors of the DC:DC power converter 100 to supply a controlled and gradually increasing amount of current from the DC power source 11 to the DC electrical network 12; open the first controllable circuit breaker X1 if the gradually increasing amount of current supplied to the DC electrical network 12 reaches a level defined by a first trip profile 201, the first trip profile 201 defining a gradually decreasing current level; and open the second controllable circuit X2 breaker if the gradually increasing amount of current supplied to the DC electrical network 12 reaches a level defined by a second trip profile 202, the second trip profile 202 defining a gradually decreasing current level, the gradually decreasing current level defined by the first trip profile 201 being higher than the gradually decreasing current level defined by the second trip profile 202.

The invention discloses an intelligent management system for urban tunnels, building equipment control systems are mutually connected through a network to form comprehensive and integrated power supply, monitoring and control, an integrated control cabinet is arranged at the tail end of the intelligent management system, and power distribution, metering, electrical safety and control are integrated in the integrated control cabinet. The control core monitors the voltage, current, power, electric quantity, residual current, on-off state, lightning arrester state and cabinet temperature of a power supply loop in the cabinet and the current and state of an output loop; wherein the residual current alarm adopts an independent communication type, and forms a residual current alarm system through an integrated energy-saving electrical network; the integrated control cabinet is provided with a communication interface which communicates with FAS and SAS, functions of building equipment monitoring, power monitoring, illumination control, residual current detection, energy consumption metering, building environment detection and energy efficiency management are realized by applying a set of software, and real-time and historical data interconnection and intercommunication and interface integration are realized.

A power electronics converter connectable, on a DC-side, to a DC electrical network and either, on an AC-side, to an electrical machine coupled to a drive shaft of an engine or propulsor, or, on a second DC-side, to a battery pack. The power electronics converter includes: a power conversion unit including a plurality of semiconductor switching elements and a DC-link; and a gate driver unit, configured to control the semiconductor switching elements so that the power conversion unit: inverts DC power received from the DC electrical network to AC power and provides the AC power to the electrical machine, rectifies AC power received from the electrical machine to DC power and provides the DC power to the DC electrical network, or performs DC-DC conversion between the DC-electrical network and the battery pack; wherein the gate driver unit includes an equipment health monitoring component.

A process for stabilizing an electrical network, by combining energy storage and generation steps, and for producing ammonia is provided.

The invention relates to a method for optimizing the positioning of sensors in an electrical network comprising a set of nodes, the sensors being configured to provide measurements of electrical variables of the network. According to the invention, such a method comprises: a. an initialization (E1) of the positioning of the sensors, by random selection of an initial solution corresponding to a set of positions of the sensors within the nodes of the network, and an initial temperature parameter T0, b. an evaluation (E2) of a performance of the initial solution, and c. at least one iteration of evolution of the positioning of said sensors, producing from a positioning solution of rank i ≥ 0 a positioning solution of rank i+1, by simulated annealing algorithm. Such a method also comprises a placement (E8) of the sensors within the network at the positions determined by the positioning solution of rank i+1 obtained at the end of the evolution iterations.

It is an object of the present invention to provide an electricity distribution network comprising an automation system which, following the occurrence of a fault on the electrical network, allows the electrical network to be re-powered net of the portion of the electrical network affected by the fault, without the need for intervention by the operator and without the need to be integrated into a central system. This excellent result is achieved by virtue of a network automation unit, connected to the high voltage to medium voltage electrical transformation station and to the medium voltage to low voltage electrical transformation substations, configured to transmit automation logic instructions and / or automation parameters to the high voltage to medium voltage electrical transformation station and to the medium voltage to low voltage electrical transformation substations. A method is further disclosed of controlling such electricity distribution network, implementable by through a related software.

According to an embodiment, a method includes receiving sensor data measured by a plurality of SCADA-enabled sensors associated with an electrical grid and identifying a plurality of momentary outages associated with the electrical grid based on the sensor data. The method further includes predicting (1) a plurality of possible sustained outages associated with the electrical grid based on the plurality of momentary outages and (2) a sustained outage likelihood from a plurality of sustained outage likelihoods for each possible sustained outage from the plurality of possible sustained outages based on the plurality of momentary outages.

An all-terrain outdoor elevating nacelle comprising a mechanism for lifting a working platform, this mechanism being mounted on a chassis provided with a front bridge and a rear bridge that are provided with wheels. The motive power for moving the elevating nacelle on the ground is provided by a first electric motor and that for actuating the lifting mechanism is provided by a second electric motor via a hydraulic pump which it drives. The motors are supplied by a battery that can be recharged by one or more single-phase chargers on board the elevating nacelle from a single-phase or three-phase electrical network, a slot being further provided for mounting a power supply unit intended to be connected to the charger(s) to recharge the battery. The elevating nacelle is more environmentally friendly and quieter.

The invention relates to a UPS device (10) configured to supply power simultaneously to a critical load (31) and a non-critical load (32), the UPS device (10) comprising: - a first converter (14) and a second converter (15) that are coupled in series, - an energy storage source (17) connected to that terminal of the first converter (14) that is coupled to the second converter (15), - an input (11) connected to a supply network (30), a first output (12) coupled at the output of the second converter (15) and to a critical load, and a second output (32) coupled to the input (11) and to a non-critical load, and - a bypass switch (16) connected between the input (11) and the first output (12). It comprises an electromechanical switch (18) connected between the input (11) and the first converter (14), and a control unit (20) configured to monitor the quality of the electric current of the electrical network (30) and control the operating mode of the device (10) so as to maintain the simultaneous supply of power to the critical load (31) and the non-critical load (32).

The invention discloses a glasses leg, intelligent glasses and an intelligent glasses assembly. The glasses leg comprises a glasses leg main body, the glasses leg main body comprises a plurality of stacked circuit boards, and at least one functional module is arranged on one side of the circuit board corresponding to the outer side of the glasses leg main body; at least one device circuit board group exists in the plurality of circuit boards, the device circuit board group comprises a plurality of circuit boards which are adjacently arranged, at least one device accommodating cavity is arranged among the plurality of circuit boards which are adjacently arranged in the device circuit board group, and at least one functional module is arranged in the device accommodating cavity; any one functional module is electrically connected with at least one other functional module through the electrical network on the glasses leg main body; the function module comprises any one of a battery, an electrical function module or an electrical connecting piece. According to the invention, the glasses legs are formed based on the circuit board, so that the convenience and efficiency of assembling production of the glasses legs and the intelligent glasses are improved.

The invention relates to the technical field of power systems, in particular to a power grid power failure consequence analysis method considering supply chain-gas-electricity fault conduction, which comprises the following steps: S1, modeling an electrical network coupling relationship: identifying a key coupling point; s2, supply chain fragile link analysis: evaluating potential high-risk links in the system; s3, gas pipeline network fault modeling: establishing a pressure and flow calculation model of a natural gas pipeline network; s4, pneumoelectric coupling assembly modeling: establishing mathematical models of a gas turbine and a compressor; s5, urban power grid fault modeling: evaluating the operation state of the power grid under the fault; s6, power failure consequence evaluation index construction: quantifying social influence and recovery priorities in different fault scenes; according to the method, the chain propagation path of the electrical coupling network under the fault condition can be systematically revealed, high-risk coupling components and fragile links are effectively identified, and the understanding depth and the fault evaluation accuracy of a complex coupling energy system are improved.

The invention relates to a sensor(S), in particular for an electrical network of an electrically driven vehicle, in particular in an electric car. The sensor according to the invention comprises first of all a measuring device (ME) for current measurement and / or for voltage measurement in the electrical network, in particular with a low-resistance current sense resistor for current measurement according to the four-wire technique. Furthermore, the sensor(S) according to the invention comprises an integrated insulation monitoring device (ME, IQ, Rk, S3) for monitoring an electrical insulation of high-side and / or low-side of the electrical network. The sensor(S) according to the invention is characterized by the fact that the insulation monitoring device (ME, IQ, Rk, S3) operates actively and impresses measurement pulses into the electrical network for insulation monitoring.

Voltage samples are collected for a source and loads connected thereto by an electrical network. Respective negative sequence voltage difference values are generated for respective source / load pairs from the voltage sample. A connection (e.g., a loose connection) in the electrical network is identified based on the generated negative sequence voltage difference values. The identified connection is reported to a user. Identifying a connection in the electrical network may include identifying at least one source / load pair having an associated negative sequence voltage difference value that meets a predetermined criterion and identifying the connection based on the identified at least one source / load pair. Identifying the connection may include identifying at least one source / load pair having an associated negative sequence voltage difference value with a magnitude falling outside of at least one range associated with the at least one source / load pair.