70 results about "Grid interface" patented technology

The invention relates to the technical field of power system communication, in particular to a protocol conversion and communication adaptation system for an optical storage and charging grid-connected device. Comprising a protocol conversion unit used for dynamically analyzing heterogeneous protocols of a photovoltaic inverter, an energy storage converter, a charging pile and power grid side equipment; a communication adaptation unit; an energy collaboration unit; a power grid interface unit; and a man-machine interaction unit. According to the method, the protocol mapping rule base is dynamically updated through the plug-in type architecture module and the machine learning algorithm, self-adaptive analysis of multiple heterogeneous protocols and variant protocols is achieved, the protocol analysis accuracy and generalization ability are improved, and the problem that a traditional static rule base is insufficient in adaptability to non-standard protocols is solved; according to the invention, the distributed edge computing architecture is adopted to construct the bidirectional communication link, so that the real-time performance and security of the communication link are improved, and the defects of high data delay and incomplete security mechanism in the traditional communication architecture are improved.

The invention provides a subsynchronous oscillation monitoring system and method for a wind power generation system, and the system comprises a signal collection module which is used for obtaining an output current parameter and a power grid interface voltage parameter in a target wind power plant region, and generating a current and voltage monitoring value; the feature extraction module is used for extracting oscillation frequency parameters and oscillation feature parameter values based on the current and voltage monitoring values; the dynamic threshold module is used for acquiring a power grid load parameter and a wind speed parameter and generating a dynamic threshold parameter value through weighted calculation; the state judgment module is used for performing state logic judgment based on the oscillation frequency parameter and the dynamic threshold value to obtain an oscillation state judgment value; and the result output module is used for generating a monitoring alarm signal value based on the oscillation state judgment value. According to the method, dynamic environment response and accurate feature extraction can be combined, the monitoring sensitivity and reliability are enhanced, the misjudgment probability caused by external interference is reduced, the protection action accuracy is optimized, and stable operation of a power grid is guaranteed.

The invention provides a grid interface display method and device, a chip system and a storage medium, and relates to the technical field of terminals. In the scheme of the invention, the electronic equipment can sequentially splice the to-be-spliced pictures according to the APs of the to-be-spliced pictures, splice every N to-be-spliced pictures adjacent to the APs into a strip-shaped to-be-spliced picture, and store the spliced to-be-spliced pictures in a cache, and N is an integer greater than or equal to 2. And after the GPU obtains a drawing instruction from the CPU, the GPU can read the spliced picture from the cache and draw the spliced picture into the View control. Compared with a traditional grid interface drawing mode in which one picture occupies one grid, in the grid interface drawing scheme based on the spliced pictures, one spliced picture occupies a plurality of grids, so that the number of the pictures drawn by a GPU and the number of times of drawing the pictures can be reduced in magnitude, and the drawing efficiency of the grid interface based on the spliced pictures is improved. And the overall processing speed of the electronic equipment is improved.

The present disclosure relates to a method for controlling a power distribution system comprising distributed charging station(s) for coupling to electrical vehicle(s) (EVs) and a grid interface for coupling the distributed charging station(s) to a power grid. The method comprises determining an EV power setpoint of the EV(s) based on received data; determining a first overload condition based on the EV power setpoint and a first power constraint of the distributed charging station(s); updating the EV power setpoint based on the first overload condition; determining a second overload condition based on the updated EV power setpoint and a second power constraint of the grid interface; redetermining the EV power setpoint based on the updated EV power setpoint and the second overload condition; and controlling the power distribution system based on the redetermined EV power setpoint. The present disclosure also relates to a respective system and power distribution system.

Systems and techniques are provided for performing wireless communications. In some aspects, a mesh gate includes an access point (AP) interface and a mesh interface, and can monitor a sub-gigahertz wireless radio channel for probe requests. An AP mode of the mesh gate can be activated to turn on the AP interface based on receiving a probe request from a station (STA) in a Basic Service Set (BSS). The mesh gate can wirelessly connect to and perform communications with the STA using the AP interface. The mesh gate can perform communications with one or more mesh nodes in a mesh BSS using the mesh interface, wherein the mesh gate node is configured to provide communications between the STA and the one or more mesh nodes via an interconnection between the AP interface and the mesh interface.

The application belongs to the field of simulation and simulation, and discloses a dynamic grid interface setting method based on a text interaction interface and related devices, which comprises the following steps: obtaining a text interaction command sample; identifying dynamic grid interface setting parameters in the text interaction command sample and replacing them with placeholders to generate a command template for dynamic grid interface setting; obtaining dynamic grid interface setting parameters of each dynamic grid interface of a simulation model and replacing the placeholders in the command template in a batch replacement mode to obtain setting commands for each dynamic grid interface; and sending the setting commands for each dynamic grid interface to a text interaction interface of simulation software for setting of each dynamic grid interface of the simulation model. The application solves the problems of low efficiency, errors and complicated operation of dynamic grid interface setting in the prior art, and converts the setting process from manual operation to batch automatic execution, thereby providing an efficient and low-threshold automatic means for batch interface configuration in simulation preprocessing.

This invention discloses a coordinated control system and method for a megawatt-level photovoltaic-storage-charging microgrid, belonging to the field of integrated energy management and microgrid control technology. The system includes a grid interface, a photovoltaic power generation array, a large-scale energy storage system, a charging pile cluster, and a microgrid management system. The method constructs a five-layer efficient control logic system comprising a prediction layer, an energy control layer, a load control layer, an operation layer, and a value-added layer. Its core lies in using the power balance equation as a basis to dynamically adjust the charging and discharging power of the energy storage system, thereby maximizing the absorption of photovoltaic output, accurately managing grid demand, and adaptively adjusting the charging load. This invention introduces the concept of a photovoltaic discharge threshold that matches the physical start-up characteristics of photovoltaics. Based on the dynamic control logic of charging photovoltaics with power ramping, it achieves the operational goal of photovoltaic power utilization exceeding 70%, significantly reducing charging costs and improving the overall economy and reliability of the system.

This invention belongs to the field of periodic signal parameter estimation, and discloses a method, device, and medium for estimating the periodicity of a signal based on off-grid. The method includes: Step 1, constructing a cost function; Step 2, performing p=0 iterations to initialize the fundamental frequency f of the periodic signal; Step 3, performing the (p+1)th iteration, substituting the estimated value of f from the p-th iteration into J(f,u), and optimizing u to obtain an estimated value of u; Step 4, substituting the estimated value of u from the (p+1)th iteration into J(f,u), and using Newton's method to optimize the fundamental frequency f; Step 5, obtaining the period estimate from the (p+1)th iteration; Step 6, repeating steps 3-5 until the number of iterations P. This invention can be applied to practical communication or signal processing hardware systems to solve the problem of inaccurate period estimation caused by crystal oscillator frequency drift in the hardware system, thereby improving the performance of subsequent communication or signal processing algorithms.

The present application relates to the technical field of power system communication, in particular to a kind of optical storage fills grid-connected device protocol conversion and communication adaptation system. Including: protocol conversion unit, for dynamic analysis photovoltaic inverter, energy storage converter, charging pile and heterogeneous protocol of grid-side equipment;Communication adaptation unit;Energy coordination unit;Grid interface unit;Man-machine interaction unit.The present application updates protocol mapping rule base dynamically through plug-in architecture module and machine learning algorithm, realizes the adaptive analysis of multiple heterogeneous protocols and variant protocols, improves the accuracy and generalization ability of protocol analysis, solves the problem of insufficient adaptability of traditional static rule base to non-standard protocol;The present application adopts distributed edge computing architecture to build bidirectional communication link, improves the real-time performance and security of communication link, improves the defects of high data delay and imperfect security mechanism in traditional communication architecture.

The invention provides a mobile multi-port optical storage and charging integrated device and a control method, and relates to the technical field of new energy automobile charging, an energy storage module, a charging module, a chassis power module, a photovoltaic interface and a power grid interface are interconnected through a direct current bus, so that directional flow and distribution of energy are realized; the chassis power module is controlled to be started to move the mobile multi-port optical storage and charging integrated device, the power of the photovoltaic interface, the power of the charging module and the charge state actual value of the energy storage module are obtained through the monitoring module, and the power control mode of the mobile multi-port optical storage and charging integrated device is judged; generating a power control instruction of the energy storage module and the power grid interface according to the determined power control mode; power control instructions of the energy storage module and the power grid interface are input into the energy storage module and the power grid interface, power control over the energy storage module and the power grid interface is achieved, and the consumption capacity of distributed photovoltaic power generation is improved while the increasing charging requirement of a high-speed service area is met.

The invention discloses a method for improving the interface bonding capacity of a continuous casting negative plate grid. The method comprises the following steps that S1, surface texturing treatment is conducted on the negative plate grid formed through continuous casting; s2, carrying out ultrasonic cleaning treatment on the grid treated in the step S1 in an organic-inorganic composite activation solution; s3, carrying out hot air drying on the grid treated in the step S2; according to the invention, through treatment of the organic-inorganic composite activation solution, a composite activation layer with mechanical anchoring and chemical bonding functions is constructed on the surface of the grid, and waterborne polyurethane resin in the activation layer is used as an excellent binder, is tightly combined with the textured surface and firmly fixes inorganic functional components, so that the performance of the grid is improved. The metal tin in the inorganic component can form firm metallurgical bonding with the lead matrix in the subsequent process, and the synergistic effect of organic bonding and inorganic metallurgical bonding fundamentally changes the weak bonding state that a traditional continuous casting plate grid only depends on physical embedding.

The utility model relates to the field of new energy power generation and transmission, in particular to an energy storage and inversion all-in-one machine, which comprises an inversion control unit for bidirectional current conversion; the energy storage battery unit is electrically connected to the inversion control unit, the energy storage battery unit receives the input of the inversion control unit to store electricity, or the energy storage battery unit outputs electric energy to the inversion control unit; the photovoltaic input unit is electrically connected to the inversion control unit and outputs electric energy generated by photovoltaic power generation to the inversion control unit; the inversion control unit is electrically connected with a GRID interface, the public power grid is electrically connected with the GRID interface, and the inversion control unit transmits electric energy to the public power grid through the GRID interface. The application has the effects of expanding the adaptation range and enhancing the independence of the system.

The invention belongs to the field of computational electromagnetism numerical simulation, and particularly relates to a non-uniform conformal FDTD method based on a sub-grid technology. According to the method, non-uniform conformal geometric correction is introduced into the sub-grids, so that high-precision fitting of a curved surface boundary is realized, step approximation errors are reduced, and the calculation precision of field quantities near the boundary is improved; according to the method, bidirectional coupling transfer which simultaneously meets line integral conservation and flux conservation is established on a main-sub grid interface, and a conservation relation required by a non-uniform conformal FDTD method is prevented from being damaged, so that interface numerical value reflection is effectively inhibited, energy non-physical errors are reduced, and long-term stability is improved; and fine grids are only adopted in the local fine structure neighborhood and are matched with time sub-cycle propulsion, so that global grid encryption and limitation of global time step length to a minimum unit are avoided, and the storage and calculation time overhead is remarkably reduced while the precision is ensured. According to the method, geometric modeling precision, interface stability and calculation efficiency are considered, and the method has high engineering application value.

This invention relates to power electronic conversion technology, aiming to provide a three-port single-stage bidirectional DC-AC converter with photovoltaic, energy storage, and charging capabilities, and its control method. It includes a public grid interface unit and two DC port power units connected to different DC sources. The former includes a grid-side full-bridge circuit, a power frequency polarity reversal circuit, and a filter circuit, with the output terminal on the public grid side led out from the power frequency polarity reversal circuit. The latter includes an input filter capacitor, a full-bridge circuit, and a high-frequency transformer. The input filter capacitor is connected in parallel across the DC source and the full-bridge circuit, and the output midpoint of the full-bridge circuit is connected to the primary winding of the high-frequency transformer. The secondary windings of the high-frequency transformers in the two DC port power units are connected in parallel, and their common connection point is connected to the midpoint of the bridge arm of the grid-side full-bridge circuit. This invention completely eliminates the intermediate high-voltage DC bus and large-capacity electrolytic capacitor, structurally improving power density and long-term reliability; it can flexibly support various complex operating modes.

A grid interface assembly (100) for receiving one or more containers (2) from a storage and retrieval system comprising a grid, a plurality of containers located in stacks beneath the grid; and a plurality of load handling devices operable to move along the grid and configured to retrieve the one or more containers from the stacks, the grid interface assembly comprises: i) a transfer position (101, 102) for receiving one or more containers from the one or more of the plurality of load handling devices operable on the grid, ii) a conveyor apparatus (103, 104) for conveying the one or more containers beneath the grid, said transfer position (101, 102) being laterally disposed from the conveyor apparatus (103, 104); iii) a transfer mechanism (103c, 104c) configured to convey containers between the transfer position (101, 102) and the conveyor apparatus (103, 104).

The application belongs to the technical field of equipment evaluation, and discloses a kind of calculation method and system of sliding bearing dynamic characteristic coefficient, comprising: taking half of real oil film model as research object at axial symmetry plane, and setting the side surface of film and oil inlet located at axial symmetry as symmetry plane, which can significantly save computing resources and speed up the calculation speed;And the film and the oil inlet are separately divided into grids, and the outer wall surface of the film and the bottom surface of the oil inlet are set as grid interfaces, which can realize automatic grid division while ensuring grid quality;The application applies displacement, speed small disturbance to the journal in the equilibrium position by UDF in Fluent software, realizes the calculation of sliding bearing dynamic characteristic coefficient, and effectively improves the calculation accuracy.

The utility model discloses a universal battery and photovoltaic energy storage inverter matching test platform. The universal battery and photovoltaic energy storage inverter matching test platform comprises a photovoltaic access module, a battery access module, a power grid access module and an EPS emergency load access module, the photovoltaic access module is connected with a PV interface of a tested photovoltaic energy storage inverter, the battery access module is connected with a BAT interface of the tested photovoltaic energy storage inverter, the power grid access module is connected with a GRID interface of the tested photovoltaic energy storage inverter, and the EPS emergency load access module is connected with an EPS / Backup interface and a GRID interface of the tested photovoltaic energy storage inverter. The battery access module comprises a tested battery module, and the tested battery module is electrically connected with a BAT interface of a tested photovoltaic energy storage inverter. According to the utility model, most three-phase and single-phase photovoltaic energy storage inverters in the market can be compatible, input and output of most electrical interfaces of the photovoltaic energy storage inverters can be provided, and communication protocol adaptation, parameter configuration, working mode and performance tests of the photovoltaic energy storage inverters can be carried out. The device is suitable for matching test of energy storage batteries of different manufacturer models and photovoltaic energy storage inverters.

The present application relates to the technical field of terminals. Provided are a grid interface display method, and a device, a chip system and a storage medium. In a solution of the present application, an electronic device can sequentially stitch, according to APs of images to be stitched, the images to be stitched, stitch every N images to be stitched having adjacent APs into a strip-shaped image to be stitched, and store, in a cache, stitched images to be stitched, wherein N is an integer greater than or equal to 2; and after a GPU acquires a drawing instruction from a CPU, the GPU can read the stitched images from the cache, and draw the stitched images in a view control. Compared with a traditional grid interface drawing method in which one image occupies one grid, the grid interface drawing solution based on stitched images that is provided in the present application allows one stitched image to occupy a plurality of grids. In this way, the number of images drawn by a GPU and the number of instances of drawing the images can be reduced in order of magnitude, thereby improving the overall processing speed of the electronic device.

The application provides a photovoltaic power station power control method, comprising the following steps: bringing a grid-connected point signal and a control parameter into a pre-constructed photovoltaic power station power control model, and adjusting active / reactive current output values of the photovoltaic power station; and based on the active / reactive current output values of the photovoltaic power station, controlling active / reactive frequency of a grid-connected point of the photovoltaic power station to a grid dispatching setting value. The technical scheme provided by the application adopts a modularized idea, and through the photovoltaic power station active / reactive control structure obtained by division and comprising three parts of a field station level active / reactive control module, a photovoltaic inverter control module and a photovoltaic inverter grid interface module, different types and different scales of photovoltaic power stations are reacted to access grid active / reactive operation dynamics.

An arrangement (2) for power conversion and electric drive comprising a power converter (201) comprising three branches (202), an electric motor (203) comprising three open-end stator windings (204) each having a first end and a second end, and a power switch (205). The first ends of the stator windings (204) are connected to respective ones of the three branches (202) of the power converter (201), and the second ends of the stator windings (204) are connected together and have the same potential. The power switch (205) is used to selectively disconnect one of the second ends of the stator windings (204) from all other second ends to establish at most two different potentials. The established at most two different potentials of the second ends of the stator windings (204) can be connected to respective ones of the branches (206) of a grid interface (207) connected to the arrangement (2).

A storage and retrieval system (Fig 1) comprises an enclosure (30, Fig 5) with side walls 32 defining internal volume 31 having a temperature control system (-18 to -30 degrees centigrade) configured to control air temperature therein. A frame module 121 extending over openings to define conveyor apertures, and an associated gap insulation jacket 123 to occlude a gap between storage enclosure and frame module 121. Also shown are conveyor sections 114, 124 and doors 125.Enclosure (30) houses a grid (4), with a plurality of storage containers (2) stacked (3) below, container access station (100) and load handling devices (20) moving containers between stacks and container access station (100), which further comprises source container system (103) with drop off location disposed within enclosure (30), receives containers from devices (20). Also included are: source container presentation location (106, 109) disposed outside enclosure (30), source container pick-up location (107) within enclosure (30), source container conveyor system (102 ) conveying containers from source container drop-off location to source container pick-up location via container presentation location. Grid interfaces (101), beneath a plurality of the grid spaces, with each of drop-off / pick-up locations (l08, 112) exposed beneath grid space allows devices (20) operating on grid to transfer containers between devices and drop-off / pick-up locations (105, 112). Source and destination systems convey containers through enclosure side wall 32 openings and have linear direction change sections, the latter disposed outside enclosure (30).

The invention relates to a compressed gas energy storage and flow battery coupling system. The system comprises an energy management system, a battery management system, a temperature management system, a power grid interface platform and a heat utilization device. Wherein the battery management system comprises a flow battery subsystem and a compressed gas energy storage subsystem, and the flow battery subsystem and the compressed gas energy storage subsystem are both used for being connected to a power grid through the power grid interface platform. The energy management system can be used for controlling the power grid interface platform to control the electric energy output of the flow battery subsystem and the compressed gas energy storage subsystem, so as to meet the requirements of a power system on large capacity and high response speed of the energy storage system in some scenes, and improve the reliability of power supply. And the temperature management system is also used for heat exchange between the flow battery subsystem and the compressed gas energy storage subsystem so as to realize heat interconnection between the flow battery subsystem and the compressed gas energy storage subsystem. The temperature management system further supplies heat to the heat utilization device so that heat can be comprehensively utilized, and the coupling system at least provides electric energy and heat energy so that multi-energy combined supply can be achieved.

Certain aspects of the present disclosure provide techniques for site control. An example method includes obtaining a plurality of power measurements from one or more site energy sources and one or more points of common coupling associated with the one or more site energy sources, wherein the one or more points of common coupling correspond to one or more nodes where the one or more site energy sources are coupled to a grid; determining whether the plurality of power measurements violate a grid limit of the grid for at least a threshold time period; and sending a trip signal to at least one inverter controller associated with at least one site energy source of the one or more site energy sources based on the plurality of power measurements violating the grid limit for at least the threshold time period.

This invention discloses a method for coordinated voltage and reactive power control in a public power grid, comprising the following steps: S1, constructing a multi-objective optimization model based on weight allocation or Pareto optimal solution prioritization, simultaneously achieving three types of objectives: public power grid interface compliance, internal node voltage security, and control economy through reactive power autonomous control; S2, adjusting the reactive power autonomous control strategy implemented in step S1 according to different types of source-grid-load-storage projects; This invention balances grid interface requirements, internal voltage security, and economy through multi-objective optimization, and proposes a hierarchical optimization framework (upper-level centralized decision-making + lower-level distributed execution), combined with an improved PSO algorithm and local feedback control, enabling adaptive adjustment under different scenarios, significantly improving internal voltage security and reducing costs while meeting public power grid requirements.

The invention belongs to the technical field of electromagnetic emission, and particularly relates to a multi-scale joint simulation method for current-carrying frictional wear between pivot rails. The method comprises the following steps: step 1, finite element simulation geometric modeling; 2, material setting; 3, setting a dynamic grid interface; 4, setting a magnetic field interface; 5, setting a current interface; 6, setting a solid heat transfer interface; step 7, carrying out grid division; 8, electromagnetic thermal multi-physics field coupling finite element simulation is carried out; 9, carrying out molecular dynamics simulation geometric modeling; step 10, relaxation; eleventhly, pivot rail current-carrying friction wear molecular dynamics simulation is carried out. According to the invention, the current-carrying frictional wear condition between the pivot rails can be observed in real time, and the research on the frictional wear process by a single parameter can be carried out by using an accurate control variable method.

This invention proposes a harmonic suppression method for voltage-controlled DG-Grid interface converters based on a two-step virtual impedance. This method utilizes a two-step virtual impedance control structure to actively suppress DG output current harmonics by reconstructing the harmonic voltage reference command. The effectiveness of the method is visually verified through the output voltage and current waveforms. Theoretical and simulation results show that this method not only effectively improves the DG output current quality under different harmonic severity levels but also possesses advantages such as simple structure and ease of integration, providing an effective harmonic mitigation solution for high-standard grid-connected operation of distributed generation systems.

This application provides a method, device, chip system, and medium for drawing controls based on a grid-based interface, relating to the field of terminal technology. In this application's solution, a Drawable list is constructed, converting each view in the previous multi-view layout into a drawing object and placing it in the Drawable list. During drawing, the drawing of each Drawable is triggered separately, and each Drawable has its own specific drawing area. This process is equivalent to drawing each control as an overlay of a single ItemView. Compared to drawing a single ItemView using a multi-view layout, the scheme of using multiple layers based on Fresco to draw a single ItemView can shorten the inflate time of a single ItemView, thereby shortening the layout time of the entire grid interface and enabling the grid interface to be drawn quickly.

The embodiment of the invention provides a grid interface display method and device, a chip system and a storage medium, and relates to the technical field of terminals. In the scheme of the invention, based on the AP value of the picture in the first grid and the AP value of the picture in the last grid in the current grid interface, the AP range of the pictures which are possibly used when the target grid interface (including N columns of grids) is drawn is predicted, and the pictures in the AP range are spliced to obtain a spliced picture, one row comprises 2N-1 pictures, and one row comprises 2N-1 pictures. The difference between the AP values of the pictures of the adjacent grids in one row is 1, and the difference between the AP value of the picture of the i-th grid in the j-th row and the AP value of the picture of the i-th grid in the (j + 1)-th row is N. And when the current gear is switched to the target gear, cutting out a large picture from the spliced picture based on the zoom center, and drawing the large picture into the View control. According to the scheme, the number of drawn pictures is reduced from multiple to one, the number of times of picture drawing is reduced to one, the drawing time is shortened, and the processing speed is improved.

The invention provides an energy router and a control method and control device thereof. The energy router comprises a photovoltaic interface, an energy storage interface, an AC power grid interface, a first conversion unit and a second conversion unit. The first conversion unit is used for converting the voltage level of the first direct current received by the photovoltaic interface and transmitting the second direct current to the energy storage interface. The second conversion unit is used for rectifying the first alternating current from the alternating current power grid interface into third direct current and transmitting the third direct current to the energy storage interface. According to the invention, energy routing between different interfaces can be realized, and high flexibility is realized. Through different conversion units, the functions of voltage level conversion, electrical isolation, energy transmission and the like can be realized, power flow control, electric energy quality control and the like can also be realized, and the actual requirements of a shore power system are met.

There is provided a charging system (10) for charging an electric vehicle, the charging system comprising: a grid interface (GI); a plurality of converter modules (Cm) connected to the grid interface (GI); reconfiguring the switch (S); a plurality of distributors (Dn) connected to the plurality of converter modules (Cm) via a reconfiguration switch (S); and a liquid cooling system (CS). The converter module (Cm) is flexibly assigned to the distributor (Dn) via a reconfiguration switch (S) for adjusting different charging power requirements of the distributor (Dn). The total installation current capacity of the converter module (Cm) is lower than the total installation current capacity of the distributor (Dn). The distributor (Dn) is fluidly connected in a cooling loop of the liquid cooling system (CS). The liquid cooling system (CS) comprises a central cooler (CC) and a central pump (CP). The maximum cooling power of the liquid cooling system (CS) is adapted to the maximum value of the ohmic losses generated in the distributor (Dn) at the total installation current capacity of the converter modules (Cm), for which the central cooler (CC) is dimensioned.