26 results about "Device Grid" patented technology

A grid data transmission method according to an embodiment may comprise the steps of: encoding grid data; and transmitting the bitstream including the mesh data. A mesh data receiving method according to an embodiment may comprise the steps of: receiving a bitstream including mesh data; and decoding the grid data.

A displacement decoding unit (205) of a mesh decoding device (200) according to the present invention includes: a bypass arithmetic decoding unit (205A) configured to generate a coefficient level value by performing bypass arithmetic decoding on a displacement bit stream; an inverse quantization unit (205B) configured to generate a first transformed coefficient by performing inverse quantization on the coefficient level value; an adder (205D) configured to generate a second transformed coefficient by adding a prediction transformed coefficient and a prediction residual; an inter prediction unit (205F) configured to generate the prediction transformed coefficient by performing inter prediction by using the second transformed coefficient of a reference frame read from the frame buffer; and a second inverse transform unit (205G) configured to generate a decoded displacement by performing second inverse transform on the second transformed coefficient.

The invention relates to a power interface device grid-side capacity control method and converter equipment, one side of each power interface device is connected with at least one converter, the other side of each power interface device is connected with a power grid, and when two or more power interface devices exist, the power interface devices are connected in parallel and then connected with the power grid. And for each power interface device, the grid-side current and the grid-side power of the power interface device are obtained, the power output reference value of each converter is adjusted based on the grid-side current, the grid-side power and a preset current threshold value, the power output of the converter is adjusted based on the adjusted power output reference value, and the power output comprises active output and / or reactive output. The power output of each converter is adjusted by taking the grid-side current limit value of the power interface device as a control target, so that the current flowing through the grid-side interface of the power interface device is controlled, the grid-side current is limited in a reasonable range, the condition that the capacity of a grid-side line exceeds the limit or is limited is avoided, and the service life of the power interface device is prolonged. And the working reliability of the converter equipment is improved.

The application discloses a kind of wisdom energy multi-energy evaluation visualization system and method for industry, it is related to energy big data visualization cross technical field, including, acquisition multi-source heterogeneous data and pre-processing, by space-time hash coding method, generate high-dimensional energy data of space-time alignment;Based on three-dimensional manifold coordinate model, the equipment energy efficiency parameter is converted into equivalent energy quality field, by energy field reconstruction and geometric optimization method, generate curved manifold space and identify optimal transmission path and distortion intensity cloud chart;Based on distortion intensity cloud chart, generate thermal color scale by thermal color scale mapping algorithm, and the three-dimensional gradient field distribution of equivalent energy quality field is rendered using ray tracing method, generate visual energy evaluation interface.The application generates space and time hash code by space-time hash coding method, establishes equipment-grid mapping relationship in combination with GeoHash coding, realizes the accurate space-time alignment of multi-source heterogeneous data.

This invention relates to the field of generator grid connection technology, specifically to a remote wireless grid connection device and method for generator vehicles / generator sets based on 5G / satellite communication. It includes: a grid connection main device installed on the grid side, comprising a main control module that sends control commands to a grid connection execution module on the generator side via a remote wireless communication module; a grid connection sub-device installed on at least one generator side, comprising a grid connection execution module that receives control commands from the grid side and executes grid connection operations via a remote wireless communication module; and a remote wireless communication module comprising a remote wireless communication main module installed on the grid connection main device and remote wireless communication sub-modules installed on the grid connection sub-devices, establishing a wireless bidirectional data communication link between the grid side and at least one generator side. Compared with existing technologies, it eliminates the need for physical communication lines and additional mains bypass switches, enabling parallel grid connection without distance or quantity limitations, and offers flexible sampling and disassembly / removal, as well as high access security.

A grid data encoding method according to an embodiment may comprise the steps of: encoding grid data; and transmitting the bitstream including the mesh data. A mesh data decoding method according to an embodiment may comprise the steps of: receiving a bitstream including mesh data; and decoding the grid data.

A mesh data decoding method according to an embodiment may comprise the steps of: receiving a bitstream including mesh data; and decoding the grid data. A grid data encoding method according to an embodiment may comprise the steps of: encoding grid data; and transmitting a bitstream including the mesh data.

The invention relates to the technical field of power systems, and discloses a grid-connected grounding topological structure of a flexible converter device without a connection transformer, which is based on a topological structure that a far-end three-winding transformer and a Z-type transformer are grounded through a small resistor. The problem that a three-phase alternating-current circuit breaker is difficult to quickly and completely switch off and switch on when a non-connection transformer is matched with a traditional arc suppression coil to be grounded can be solved. When a single-pole grounding fault occurs on the direct current side of the flexible device matched with the uncoupled transformer system, a large amount of direct current bias current on the side of the flexible device flows into the alternating current network side due to the fact that no coupled transformer exists between the alternating current network and the flexible device, and the topological structure can greatly reduce the influence of the direct current bias current on the three-phase alternating current circuit breaker at the moment. And each phase of the three-phase circuit breaker at the alternating current side can be quickly and completely switched off and switched on. In addition, the topological structure can limit the peak value of the fault current on the alternating current side when the system has a single-pole grounding fault on the direct current side.

The utility model relates to the technical field of electronic circuits, and provides an energy storage equipment grid connection device and an energy storage system. An energy storage equipment grid connection device comprises an energy storage converter and a power-on preparation module. Wherein the energy storage converter is used for being connected with a power grid, and the power-on preparation module is connected with the energy storage converter through a direct-current bus. The power-on preparation module comprises a connection bus, a power-on switch, a slow charging branch, a voltage-sharing circuit, N interface units and a control unit. And the control unit is respectively connected with the power-on switch and the slow charging branch. The control unit can be used for controlling the slow charging branch to be switched on and controlling the power-on switch to be switched off at the same time, so that electric energy of the energy storage equipment can be discharged by the voltage-sharing circuit. When the pressure difference between at least two pieces of energy storage equipment is large, the energy storage equipment grid-connected device can discharge the electric energy of the energy storage equipment. And an implementation basis is provided for the energy storage equipment grid connection device to connect all the energy storage equipment into a power grid, so that the application range of the energy storage equipment grid connection device is expanded.

A grid data transmission method according to an embodiment may comprise the steps of: encoding grid data; and transmitting the bitstream including the mesh data. A mesh data receiving method according to an embodiment may comprise the steps of: receiving a bitstream including mesh data; and decoding the grid data.

The invention provides a new energy grid connection strength evaluation method, system and device based on measured impedance and a medium, and relates to the field of power system stability analysis. The method comprises the following steps: acquiring three-phase electrical quantities of a plurality of grid-connected devices, and converting the three-phase electrical quantities into a dq coordinate system to obtain corresponding dq impedance; in a preset reference coordinate system, all the dq impedances are aligned; injecting current disturbance at a device grid-connected point, and establishing a full-system dynamic matrix of device and network dynamics; and calculating sensitivity based on the full-system dynamic matrix, and evaluating the equipment grid-connected strength according to the sensitivity. According to the method, the need for detailed parameters of the equipment is avoided, the dynamic model of the grid-connected equipment is obtained only through port measurement, the whole-system dynamic matrix describing the dynamic state of the system is established in combination with the network node admittance matrix, and the new energy grid-connected intensity ASC under the small-interference stability significance is calculated based on the matrix perturbation theory.

The application provides a kind of energy storage converter power device grid source feedback parallel current sharing circuit and method, belong to power electronics technical field.The application realizes the transient current balance when power device is parallel, avoids the risk that part of device is damaged due to bearing excessive current stress, effectively prolongs the service life of device, improves the reliability of entire power electronic system.Meanwhile, stable current balance can also reduce the electromagnetic interference caused by current imbalance, improve the anti-interference ability of system.Active gate control technology can dynamically adjust current change rate according to actual current condition, so that the switching speed of parallel power device is more matched, energy loss in switching process is reduced, and the efficiency of system is improved.In addition, stable current balance helps to improve the dynamic response performance of system, reduce the ripple of output voltage and current, and improve the power quality and overall performance of system.

A mesh decoding device (200) according to the present invention includes: an atlas data decoding unit (207) configured to decode an atlas bit stream to generate and output control information. According to the present invention, it is possible to efficiently compress a displacement amount.

The present application relates to the technical field of mine digital twin, and more particularly to a digital twin construction method and system for mine mining working face. The state data sequence and communication delay parameters of the multi-source equipment of the mining working face are obtained, and the basic geometric bounding box is extracted. The feedforward pose offset is obtained, the directional translation of the bounding box front sequence surface sheet set is performed along the traction speed vector direction to generate a dynamic safety envelope area. The physical limit boundary is constructed by the hydraulic support connecting rod hinge parameter and the limit stroke of the push cylinder, the Boolean intersection operation is performed on the dynamic safety envelope area and the physical limit boundary to generate a target envelope area. According to the space intersection volume of the target envelope area and the adjacent equipment grid, the anti-interference judgment or the rendering pose update is performed. The present application can solve or at least alleviate the false alarm problem of the existing digital twin system caused by communication delay and omnidirectional space compensation, and provide a digital twin construction method and system for mine mining working face.

A mesh decoding device (200) according to the present invention includes: a subdivision unit (203) configured to generate and output a subdivision mesh and a subdivision vertex normal based on a base sub-mesh; and a mesh decoding unit (204) configured to generate and output, when two different displacements exist for a same vertex on a sub-mesh boundary, a decoded mesh by using the two different displacements having been corrected.

A displacement decoding unit (205) of a mesh decoding device (200) according to the present invention includes: a displacement encoding dimension number determination unit (205A) configured to determine a displacement encoding dimension number and output a displacement encoding method; a video decoding unit (205B) configured to decode the displacement bit stream by a video codec and output the displacement video frame; a displacement reconstruction unit (205C) configured to extract and output a quantization displacement coefficient from the displacement video frame; an inverse quantization unit (205D) configured to perform inverse quantization on the quantization displacement coefficient and output a displacement coefficient having been calculated, and an inverse wavelet transform unit (205E) configured to perform inverse wavelet transform on the displacement coefficient and output the decoded displacement having been calculated.

The invention provides a packaging structure of a cascade device and the cascade device, and relates to the technical field of semiconductors. The packaging structure of the cascade device comprises a packaging frame, a first power device and a second power device, wherein the first power device and the second power device are mounted on the packaging frame; the packaging frame is provided with a device source region, a device drain region and a device gate region, the drain of the first power device is connected with the device drain region, the source of the first power device is connected with the drain of the second power device, and the gate of the first power device and the source of the second power device are connected with the device source region. The grid electrode of the second power device is connected with the device grid electrode region; the grid electrode of the first power device is electrically connected with the grid electrode bonding pad of the first power device; and the grid field plate and / or the shielding layer of the first power device are / is electrically connected with the conductive frame on the packaging frame. The gate current of the first power device is reduced, so that the self-oscillation risk of the cascade device is suppressed, and the switching reliability and durability of the cascade device are improved.

A mesh data decoding method according to an embodiment may comprise the steps of: receiving a bitstream including mesh data; and decoding the grid data. A grid data encoding method according to an embodiment may comprise the steps of: encoding grid data; and transmitting the bitstream including the mesh data.

A mesh data decoding apparatus according to an embodiment may comprise: a receiving unit for receiving a base mesh bitstream, a displacement vector bitstream, a texture map bitstream, and signaling information; a base mesh processing unit for reconstructing a base mesh from the base mesh bitstream; a displacement information processing unit for reconstructing displacement information from the displacement vector bit stream; a reconstruction unit for reconstructing the grid based on the base grid and the displacement information; and a texture map processing unit for reconstructing a texture map from the texture map bitstream.

The invention discloses a digital power grid advanced control system, a full-drive control method, equipment and a medium, and belongs to the field of power regulation and control, the method comprises the following steps: obtaining a power signal of new energy equipment, the power signal comprising a rated frequency, a signal amplitude and a signal phase angle; calling a preset all-drive control model to determine an equipment control rate according to the power signal, wherein the preset all-drive control model is an n-order derivative model; and determining the target power of each new energy device based on the device control rate and the feeder loss parameter of the new energy device, and controlling the corresponding new energy device to generate power according to the target power. According to the invention, power calculation and control are carried out by combining the loss of the line, so that the actual transmission line of each device can be fitted, the deviation between the grid-connected transmission power of the device and the power actually received by the power grid is reduced, the regulation and control efficiency and precision are improved, and the fluctuation of the power grid can be reduced after the power deviation is reduced. The power grid stability is improved.

The invention provides an energy storage vehicle and medium-low voltage power supply vehicle cooperative power supply system and a control method, and the system consists of a power distribution network, a medium-voltage diesel generator power supply vehicle, an energy storage vehicle, and a low-voltage diesel generator power supply vehicle. The system mainly comprises a commercial power input end, a load output end, a grid-connected and off-grid switching cabinet, an energy storage converter, a lithium battery, an auxiliary power distribution cabinet and an energy storage vehicle controller. According to the invention, through a combined power protection operation mode taking the energy storage vehicle as a main part and the diesel generator power supply vehicle as an auxiliary part, different control strategies are designed according to voltage classes, rated power and distribution network transformer capacity of the energy storage vehicle and the diesel generator power supply vehicle and according to grid-connected capacity increasing and grid-connected and off-grid power supply scenes, the economic and environment-friendly characteristics of the energy storage vehicle are exerted, and meanwhile, the capacity limitation of the energy storage vehicle is solved; the vehicle utilization rate is improved, the power protection operation scene is expanded, and through wireless communication, the limitation of power grid power protection operation distribution network areas and operation site subareas is solved based on wireless grid-connected power distribution and start-stop control of 5G or an ad hoc network.

Provided is a control device of a power conversion device that can appropriately supply power from a plurality of power conversion devices to a load without requiring a common control device for the plurality of power conversion devices in a state in which the plurality of power conversion devices are connected in parallel. The control device of the power conversion device includes a voltage recognition unit that detects a voltage at a grid point of the plurality of power conversion devices, and a control unit that, in a case in which a control target power conversion device autonomously operates as a voltage source, controls an amplitude and a frequency of a voltage output by the control target power conversion device based on active power and reactive power output by the control target power conversion device, and in a case in which the control target power conversion device grid-connected operates as a current source, controls the active power and the reactive power output by the control target power conversion device based on the amplitude and the frequency of the voltage detected by the voltage recognition unit to compensate for an excess or a deficiency of the active power and the reactive power at the grid point.

A mechanism for handling mirror symmetry and gravity ambiguity in a grid of two-dimensional devices. The direction of gravity relative to a first device of three devices is determined by a gravity sensor included in the first device. The relative directions of a second and third device relative to the first device are then ascertained. The direction of gravity and the relative directions of the first and third devices are then used to determine the handedness of a triangle connecting the three devices relative to gravity. This handedness relative to gravity can be propagated throughout a grid of devices and used to eliminate mirror symmetry and gravity ambiguity in the grid.

The present invention relates to the technical field of simulation processing. Provided are a thermal simulation processing method and apparatus for a printed circuit board, and a device and a storage medium. The method comprises: constructing a geometric model of an electronic device, partitioning the geometric model into a plurality of tetrahedral cells, setting material parameters and generating a mesh model of the electronic device; performing gridding processing on a pre-established geometric model of a printed circuit board, so as to obtain a plurality of grid sub-cells, and on the basis of actual circuit data of the printed circuit board, calculating equivalent material parameters of each grid sub-cell; selecting a plurality of first tetrahedral cells from the mesh model of the electronic device; mapping the first tetrahedral cells to corresponding positions in a gridded model, so as to obtain equivalent material parameters of each first tetrahedral cell; updating the material parameters of a printed circuit board region in the mesh model of the electronic device; and performing thermal simulation processing and drawing a temperature distribution map of the printed circuit board. By means of the present invention, a high-precision temperature distribution of a printed circuit board can be obtained.

The utility model provides a kind of low grid charge low on-resistance trench gate silicon carbide VDMOS, comprising: drift layer is connected to silicon carbide substrate;Drift layer is equipped with protruding part and recess in;The depth of recess is greater than the thickness of protruding part;First P-type source region, schottky metal layer is connected to drift layer, schottky metal layer is connected to first P-type source region;Second P-type source region is connected to drift layer, and second P-type source region is connected to schottky metal layer;First P-type well region, N-type source region and second P-type well region are equipped on second P-type source region;Insulating medium layer lower part is in recess, and insulating medium layer is connected N-type source region, second P-type well region and protruding part respectively, and first suspended grid and second suspended grid are equipped in insulating medium layer;Insulating medium layer is equipped with trench;Gate metal layer is equipped in trench;On the basis of guaranteeing device voltage-withstanding characteristic, reduce P-type well region doping concentration, reduce device grid charge.

The application discloses a kind of generator set double synchronization device and method of grid-connected control system, including unit PLC, automatic synchronization grid-connected loop, manual synchronization grid-connected loop, double synchronization device, double synchronization lockout relay, GCB both sides PT measurement loop and GCB closing circuit;In automatic mode, unit PLC preferentially starts one of the synchronization devices to carry out real-time state monitoring, judges equipment state and grid-connected state according to feedback signal, if synchronization device fails or synchronization grid-connected fails, then automatically switch to another synchronization device to re-execute synchronization grid-connected operation;In manual mode, operator can select and input any one of the synchronization devices to complete grid-connected operation.The application realizes flexible switching and reliable grid connection in manual and automatic mode through double synchronization devices and intelligent switching circuit, effectively improves the efficiency and operation stability of unit synchronization grid connection, and reduces the safety risk caused by non-synchronization grid connection.