56 results about "Grounding grid" patented technology

The application relates to the technical field of system-in-package, and discloses a functional chip SIP (System in Package) system-in-package method and system. The method constructs a reduced-order discrete thermal state predictor through multi-order exponential attenuation fitting, generates a DVFS gear-noise hazard degree spectrum mapping table based on a synchronous switching noise spectrum and an ADC noise sensitivity curve, generates a multi-DVFS working condition robust grounding network topology by optimizing a narrow bridge connection structure parameter by using a sequential quadratic programming, quantizes equivalent noise interference amounts of each DVFS gear on an ADC chip, and jointly optimizes DVFS gear selection and power consumption upper limit distribution under a rolling time domain mixed integer quadratic programming framework, simultaneously performs online model correction through exponential weighted moving average and Kalman filtering, and realizes cooperative satisfaction of thermal constraints and noise constraints.

The application provides a transient ground potential rise induced coupling determination method through cable shielding layer, and belongs to the technical field of cable shielding layer.The application establishes a distributed parameter partial element equivalent circuit model of a grounding network, solves transient ground potential distribution by using a finite difference time domain method, obtains equivalent transfer impedance frequency characteristics of a braided shielding layer by using a four-port S parameter vector network analysis method and a variational asymptotic homogenization multi-scale algorithm, solves core line common mode voltage and differential mode voltage by establishing a multi-conductor transmission line equation group, constructs an artificial intelligence prediction model based on a topology perception graph neural network, solves a large-scale sparse admittance matrix by using a multilevel fast multipole method to obtain full network induced voltage distribution, and establishes a quantitative relationship model between ground potential rise and core line induced voltage, so that the technical problems that cable core line induced voltage caused by transient ground potential rise is difficult to accurately predict and effectively suppress are solved.

The application discloses a lightning impulse grounding grid frequency characteristic analysis method, system, device and medium, including: obtaining initial sample data; using the sample and a preset test frequency set to construct at least two different structure rational function interpolation models, and calculating the output residual thereof in the test frequency band; determining the target frequency point with the maximum modeling uncertainty according to the residual, calling the moment method to supplement high-precision response samples at the point; based on the updated sample set, constructing a diagonal or near-diagonal form rational interpolation model, and judging whether the prediction error of the model at the target frequency point is lower than a preset convergence threshold; if the convergence condition is not met, returning to the multiple model construction step, reiterating using the current sample set until the error meets the standard, and finally outputting the grounding grid frequency response characteristics covering the lightning impulse frequency band. The application realizes efficient analysis of the grounding grid frequency characteristics under lightning impulse, and effectively reduces the time used for analyzing the grounding grid frequency characteristics under lightning impulse.

The utility model discloses a kind of conductor shielding terminal annular array ground structure, the utility model relates to electrical engineering technical field, the utility model, comprising: connecting end, the outer wall of the connecting end is slidably connected with annular device, the annular device is locked by rotating mode, the bottom of the annular device is fixedly connected with grounding device, the annular device includes receiving end;By setting the cooperation of annular device and grounding device, the contact of the circumferential array arrangement in receiving end inner wall is slidably connected with connecting end, forms 360 ° full circumferential conductive passage, compared with traditional single-point grounding mode, contact area is improved by more than 3 times, lock ring is rotated 30 ° by dialing dial piece, the locking of connecting end and annular device can be completed, main sharp cone cooperates bulldozing block design, soil resistance is reduced, can directly penetrate clay layer with greater hardness;Sub sharp cone is automatically unfolded in soil extrusion during soil entering, forms umbrella-like grounding network, the purpose of equivalent grounding area expansion.

The application provides an antenna assembly, an antenna and a communication device, and relates to the technical field of communication, to solve the problem of poor electrostatic discharge capability in a radiator. The antenna assembly provided by the application comprises a floor, a radiator and a grounding network, the radiator is used for radiating or receiving electromagnetic waves, the grounding network comprises a grounding end and a connecting end, the grounding end is connected with the floor, and the connecting end is connected with the radiator; the grounding network further comprises a resistive line and an inductive structure, and the resistive line and the inductive structure are connected between the grounding end and the connecting end. In the antenna assembly provided by the application, the resistive line has a relatively high characteristic impedance, thus, the working frequency or bandwidth and other performances of the radiator are not obviously affected, the inductive structure can conduct direct current and block alternating current, thus, the static electricity in the radiator can be discharged to the floor through the grounding network, and the grounding network can obviously block high-frequency radio frequency signals, so that the working performance of the antenna assembly is ensured.

The application relates to the technical field of circumferential road paving topology reconstruction, and particularly discloses a circumferential road paving topology reconstruction method for a grounding grid drawing missing working condition, which injects a pulse sequence signal carrying a unique pseudo-random code feature, accurately extracts a target response from a strong interference background by using cross-correlation operation, and improves detection anti-interference capability; meanwhile, a conductor intersection point or a branch point is pre-judged by using external stray current information, and the requirement for detection equipment resolution is reduced; a preliminary conductor path diagram is generated by connecting path tracking coordinate points, and a topology node to be verified is identified based on an interference field intensity diagram; finally, a branch path is confirmed by multi-directional detection, and a complete grounding grid topology structure diagram is generated; the method aims to solve the problems of grounding grid drawing missing or inconsistency with the actual due to historical reasons or poor data management, and has high precision, high efficiency and high safety, and provides a solid data basis for grounding grid operation and maintenance.

This invention discloses a method and system for early warning of grounding wire breakage in armored shielded DC cables. The method includes: measuring the grounding current of the shielding layer and the grounding current of the armoring layer at both ends of the armored shielded DC cable; calculating the waveform similarity between the grounding current of the armoring layer and the grounding current of the shielding layer at each end; comprehensively judging whether a grounding wire breakage has occurred at each end based on the current amplitude, waveform similarity, cable operating status, and grounding grid health status; and issuing a corresponding breakage warning signal when a grounding wire breakage occurs. This invention can effectively improve the operation and maintenance level of substation secondary circuits.

The present application provides a kind of method for extracting the frequency domain impedance characteristics of grounding grid under the impact of intermediate frequency oscillation, belongs to the technical field of grounding grid operation and maintenance, the present application establishes the three-dimensional geometric model of grounding grid and uses the fractal dimension adaptive grid generation algorithm to divide the grid in the conductor area, establishes the multi-layer soil complex permittivity model to characterize the frequency variation characteristics of soil electromagnetic parameters, decomposes the intermediate frequency impact excitation signal into multiple narrowband components and inputs the artificial intelligence impedance characteristic extraction model based on neural tangent kernel theory, calculates the current density distribution and electromagnetic field distribution under different frequency points, extracts the skin effect depth and adjacent effect coupling coefficient, constructs the frequency response function of grounding grid and identifies the distribution position of resonance frequency point, adaptively adjusts the grid density parameters and iterative convergence precision parameters according to the ionization degree of soil, solves the problem that the frequency domain impedance characteristics of grounding grid under the condition of intermediate frequency impact are difficult to accurately extract.

This invention relates to the field of intelligent identification technology for step voltage anomaly areas in grounding grids, specifically disclosing an intelligent identification method for such areas. The method includes: multi-source sensor data acquisition, data sliding filtering, dynamic threshold parameter generation, voltage gradient matrix construction, collaborative judgment result generation, and anomaly identification threshold optimization. This invention utilizes a distributed sensor network to comprehensively acquire multi-source sensor data, effectively removes noise interference through sliding filtering, and then combines historical operating data with real-time environmental parameters to generate dynamic threshold parameters. Simultaneously, a voltage gradient matrix reflecting the spatial characteristics of the potential field is constructed. After accurate identification of anomaly areas through collaborative judgment, the feedback information is used to analyze and optimize the direction, dynamically adjusting the anomaly identification threshold to form a complete intelligent optimization closed loop. This achieves dual verification and accurate identification of the grounding grid status, improving the level of intelligent management.

The application discloses a lightning protection grounding net connecting mechanism of a booster station, which comprises a connecting mechanism, a first connecting part and a second connecting part, which are respectively arranged in an extensible mode at two ends of the connecting mechanism, are mutually attached at one end in the connecting mechanism and are provided with limiting grooves, are connected with ground wires at the other end outside the connecting mechanism, and a locking mechanism which is vertically arranged at the opposite end of the first connecting part and the second connecting part and penetrates through the corresponding limiting grooves. The first connecting part and the second connecting part are continuously attached by the locking mechanism, the loosening problem caused by soil settlement, freeze-thaw cycle and external force vibration is effectively eliminated, the grounding failure caused by the sudden increase of contact resistance is avoided, the sound and light alarm can be driven by the electromagnetic induction of lightning current and fault current, the grounding failure can be timely warned, and the equipment damage and personal safety accidents can be avoided.

This utility model relates to the field of grounding equipment technology and discloses a ground anchor assembly for power grounding grids. It includes a grounding plate, a support frame welded to the top of the grounding plate, a hammer plate welded to the top of the support frame, and an anchor cylinder fixedly installed at the bottom of the grounding plate. The bottom end of the anchor cylinder is conical, and the interior of the anchor cylinder is hollow. Reinforcing components are movably installed on the side walls of the anchor cylinder. During installation, rotating the adjusting screw drives the lifting sleeve and the pressing cone block downwards, pushing two reinforcing protrusions out from the opening position, thereby enhancing the friction and stability between the anchor cylinder and the ground. When disassembling the entire ground anchor assembly later, rotating the adjusting screw in the opposite direction retracts the reinforcing protrusions into the anchor cylinder, reducing the friction between the anchor cylinder and the ground, thus facilitating the removal of the ground anchor assembly from the ground, avoiding damage to the ground anchor assembly, and meeting the needs for rapid disassembly and reuse of the ground anchor assembly.

The application discloses a kind of based on image processing's ground net corrosion state identification method, it is related to electric power system ground net corrosion detection technical field, solve the technical problem that existing ground net corrosion detection method exists low detection efficiency, poor accuracy, cannot intuitively evaluate corrosion degree.Solution points are as follows: obtain ground net surface image;The image is preprocessed, and the preprocessed image is obtained;Extract the corrosion feature parameter of preprocessed image, and the corrosion feature parameter includes color feature parameter and texture feature parameter;Based on the corrosion feature parameter, corrosion state identification model is used to identify the corrosion state of ground net, and corrosion state identification result is obtained.The application is mainly used for the corrosion state of electric power system ground net fast, accurate identification, improve the safety and reliability of ground net operation.

The utility model discloses a special mechanism for round steel grounding electrode on the ground net of nail set, solved how to be more economical to implement artificial nail set, and overcome the problem that round steel grounding electrode is easy to bend in the nail set, including the soil body reference ground (14), the vertical insertion of round steel grounding electrode (13) has in the soil body reference ground (14), the lower end of round steel grounding electrode is inserted in the soil body reference ground, the first section steel pipe (1) of active sleeve joint has in the upper end of round steel grounding electrode, the first section steel pipe (1) top end port is welded and is connected with the first rectangular counterweight iron block (5), and the first section steel pipe (1) top end port is fixedly connected with the first rectangular counterweight iron block (5) lower bottom surface central place through the annular weld (12), the utility model discloses the steel pipe of multi -section link is used as the movable guide casing, and the round steel grounding electrode is guided and is restrained in the process of setting down, and the defect that round steel grounding electrode is easy to bend in the process of setting down is overcome.

This invention provides a method, system, and device for controlling a character on a sphere's surface. A coordinate system dynamic correction module calculates the direction from the sphere's center to the character's current position in real time to determine a local ascent vector. Based on this local ascent vector, the character's rotational posture is corrected so that the character's feet always face the sphere's center, and a local coordinate system is constructed using the local ascent vector. A vector projection module acquires the camera's direction vector and performs orthogonal projection processing on it using the local coordinate system to generate a tangential movement vector parallel to the tangential plane of the ground surface. This tangential movement vector is then used to drive the character to perform displacement operations. A terrain adsorption module responds to the displacement operations by emitting a probe ray based on the local ascent vector direction determined by the local coordinate system to perform sampling processing on the ground grid, acquiring the intersection point between the probe ray and the ground grid, determining the character's target height based on the intersection point, and correcting the character's position using the target height so that the character adheres to the ground grid in real time during movement.

The application discloses a power distribution network digital twin operation state prediction analysis method and device, relates to the technical field of power distribution networks, and has the technical scheme as follows: the method comprises the following steps: selecting an installation address before installing a power distribution line, and obtaining lightning stroke information at the installation address; analyzing the lightning stroke information at the installation address to determine a high-risk lightning area, obtaining lightning protection information of a grounding net in the high-risk lightning area, and obtaining fault information of the power distribution line after being installed at the installation address and suffering a lightning stroke; inputting the lightning protection information of the grounding net in the high-risk lightning area and the fault information of the power distribution line after being installed at the installation address and suffering a lightning stroke into a digital twin state model for processing and analysis to obtain a fault value; and the effect is that the lightning protection information of the grounding net in the high-risk lightning area and the fault information of the power distribution line after being installed at the installation address and suffering a lightning stroke are input into the digital twin state model for processing and analysis to obtain the fault value, and the fault value can reflect the operation state of the power distribution line in the high-risk lightning area.

The equal-potential grounding grid anomaly detection method based on dynamic weighted Mahalanobis distance provided in the application relates to the technical field of power system safety monitoring. The method collects current data of each monitoring point to establish a time series data set, uses the 2 sigma criterion to clean up the data and calculate the relative deviation rate, eliminates the dimension difference through normalization, designs fluctuation weight coefficient, single-point abnormality variable weight coefficient and global same-direction attenuation weight coefficient to construct a composite weight system, and combines iterative optimization to determine a dynamic threshold, so as to realize accurate identification of the abnormal state of the grounding grid. The application can effectively distinguish normal load fluctuation from a real abnormal state, and improve the accuracy and reliability of the grounding grid anomaly detection.

The application discloses a grounding net topology structure quick reconstruction method and system. In view of problems of large area of a transformer substation, complex grounding net structure and the like, the application adopts a grounding net topology structure quick reconstruction method and system based on a combination of a "circumferential method" and a "paving method" of a magnetic field differential method; wherein, the "circumferential method" is used for detecting a trend of a grounding net branch near a down lead, so that a main net conductor of the grounding net is positioned under the condition that no other known branch exists; the "paving method" uses a "node searching" method to replace a "branch searching" method in related research, and uses a pair of nodes to determine an existing grounding net branch. The whole process of the application is simple in measurement operation and small in measurement data amount.

This invention relates to the field of route planning technology, specifically to a rural grid-based governance planning method, system, and storage medium. By introducing an adaptive rotating grid division mechanism, this invention provides a rural grid-based governance planning method and system. First, a two-dimensional electronic map of the village is divided and labeled into grids. The number of road surface planning grids is obtained, and multiple sets of planning sets are constructed within the flat ground grids, from which candidate planning sets are selected. For the skeleton in any candidate planning set, skeleton connection rules and grid allocation rules are set based on the number of road surface planning grids and the road surface grids. The skeletons are connected according to these rules to obtain the final skeleton. Finally, the final skeleton of the optimal candidate planning set is selected for road paving. This invention's method and system significantly improve the refined utilization rate of construction resources while reducing construction costs, enhancing the overall connectivity and accessibility of the rural road network, and showing promising application prospects.

A local junction box for steam turbines is disclosed. This invention relates to the field of steam turbine junction boxes. Currently, there are no reliable isolation measures between different circuits or between the circuit and the junction box, posing safety hazards to the normal operation of the unit. This invention includes a junction box body, comprising a cabinet door and a cabinet. Inside the cabinet, there is an insulating plate and extended cylindrical nuts. A set of extended cylindrical nuts is installed on the back plate inside the cabinet. The insulating plate has a number of circular holes equal to the number of extended cylindrical nuts. The insulating plate is fixedly connected to the set of extended cylindrical nuts on the back plate of the junction box body via a connecting assembly, making the insulating plate serve as a terminal block mounting plate and a preamplifier mounting plate inside the junction box body. A grounding copper busbar is installed on the junction box body. Two grounding copper busbars are connected using one yellow-green grounding wire, and another yellow-green grounding wire is connected to the power plant grounding grid. This invention is applied to the field of local junction boxes for steam turbines.

This invention provides a method and system for predicting the state of a substation affected by stray current fluctuations. Based on train operation data, a digital twin traction power supply system model integrating train dynamics and traction arc characteristics is used to generate a stray current disturbance signal containing transient pulse components. Based on earth resistivity distribution data and the stray current disturbance signal, a three-dimensional finite element underground stray current diffusion model with adaptive mesh refinement is used to obtain the current component flowing into the substation grounding grid. Based on the current component and substation operation data, a digital twin model of the substation's electromagnetic-thermal coupling, explicitly modeled with the core lamination structure and oil-cooled convection channel, is used to make predictions, obtaining the substation's bias magnetization prediction results and temperature rise prediction results. This invention comprehensively considers multi-source heterogeneous data and combines simulation technology for the entire chain of subway traction, earth, and power grid substations, which can improve the risk prediction results of substations.

This invention discloses an integrated grounding structure for caissons. The caisson walls, frame columns, frame beams, and internal partition walls are interconnected by internal steel bars to form natural grounding electrodes, and then cast in concrete to form an integral frame structure. A ring of caisson cutting edges is provided at the lower end of the caisson walls. The steel bars inside the caisson walls are connected to the cutting edge steel bars inside the cutting edges. Grounding steel shoes are provided at the lower ends of both the cutting edges and the internal partition walls. These grounding steel shoes are connected by welding to form an artificial grounding grid. The grounding steel shoes are connected to the cutting edge steel bars or the corresponding internal partition wall steel bars by multiple lead-in steel bars. These lead-in steel bars are perpendicularly and crosswise connected to the steel bars of the corresponding cutting edges or the steel bars of the corresponding internal partition walls near the lower end. This invention enables the construction of the grounding grid for the caisson structure without excavation of the foundation trench and without secondary assembly of the grounding equipment, solving the problem of burying grounding electrodes under the existing caisson bottom slab.

The application relates to a large-current impact protection circuit of an online ground net corrosion monitoring device, and belongs to the technical field of ground net corrosion monitoring. The protection circuit is connected in series between a ground net conductor and a corrosion monitoring sensor, and comprises a four-stage cooperative protection circuit, a self-recovery protection unit and a control and detection unit. The four-stage cooperative protection circuit is sequentially composed of a gas discharge tube, a metal oxide varistor, a transient voltage suppression diode and a signal isolation unit composed of a direct-current isolation capacitor and a magnetic coupling transformer according to a signal flow direction, and is used for discharging and clamping large-current impacts in stages; the self-recovery protection unit comprises a PPTC self-recovery fuse and a magnetic latching relay connected in series. The application has the advantages that the device can withstand 100kA short-circuit current and 40kA lightning current impact without being damaged, can automatically recover the monitoring function after the impact, and is suitable for online ground net corrosion monitoring in a strong electromagnetic environment such as a transformer substation and a wind power plant.

The invention belongs to an oil and gas field surface engineering corrosion and protection technology, particularly relates to a cathode effectiveness testing device for simulating corrosion of an outer bottom plate of a storage tank, and aims to solve the problems of limited protection range, short service life, low efficiency and limitation in the conventional storage tank cathode protection technology. The test device comprises a storage tank outer bottom plate simplified model and a storage tank outer bottom plate simplified model test device. The cobweb model is composed of a plurality of connected cables, a discus is placed at each cable connection position of the cobweb model, and the part, except the cables and the discus, in the cobweb model is covered with an insulating film; a cathode protection power supply is connected to a discus, and a cathode outlet cable of the cathode protection power supply is connected to a cable of the simplified model of the outer bottom plate of the storage tank, so that the cathode effectiveness test of the simplified model of the outer bottom plate of the storage tank is realized. According to the invention, the data test of the influence degree of the anode spacing, the grounding grid and the waste pipeline on the cathode protection potential and current of the outer bottom plate of the storage tank is realized.

This invention discloses a large-scale grounding grid corrosion status assessment system based on big data analysis, comprising: a data acquisition module for collecting node resistance, potential, conductivity, humidity, and temperature, and recording time and node data; a data processing module for denoising, normalizing, and correcting data to generate a structured data matrix; a feature extraction module for extracting corrosion feature vectors based on historical records; a corrosion assessment module for probabilistic model inference and scoring to generate corrosion levels, risk matrices, and health trends; a corrosion distribution module for interpolation mapping to generate a full-network corrosion distribution map and marking high-risk nodes; a trend prediction module for simulating evolution to generate future corrosion level change curves and high-risk rankings; and a report generation module for generating a status assessment report. This invention utilizes big data analysis technology to achieve accurate corrosion assessment, risk visualization, and health trend prediction for grounding grids, improving maintenance decision-making efficiency.

This invention provides a fault diagnosis method and system for grounding grids, belonging to the field of fault diagnosis technology. Specifically, it includes: using a fault diagnosis method to perform fault diagnosis processing on the grounding grid to obtain fault diagnosis processing results; determining the optimal processing of the fault diagnosis method based on the identification and matching data of different fault types in different soil moisture ranges; determining the identification and matching data of a fault type in a soil moisture range of a matching type; and combining the identification and matching data of different fault types in different soil moisture ranges to determine the optimal fault diagnosis method for the fault type, thereby improving the reliability of the fault diagnosis processing.

The application relates to the technical field of intelligent mobile robot vision positioning and navigation control, and discloses an image recognition method for an airport luggage cart robot. A front ground image is collected, only the lower edge ground area is intercepted, and analysis pixels are obtained through preprocessing; a gradient vector field is constructed through horizontal and vertical gray scale difference in the area, effective gradient pixels are adaptively screened and directions are analyzed, a ground grid main direction is obtained; grid line pixels are extracted from the effective gradient pixels, density is adaptively calculated and block geometric centers are determined, a grid intersection set is formed, an intersection close to the front end of the robot is used to restore a current orientation angle, and the orientation angle is compared with the grid main direction to obtain an orientation error and a rotation control amount. Through the above processing, passenger and background interference is inhibited under complex illumination and tile conditions, ground grid structure is stably extracted, reliable orientation and rotation instructions are output, and the posture estimation and driving correction accuracy of the cart robot are improved.

The application provides a space-Monte Carlo constellation frequency compatibility analysis ground grid segmentation method and system, and the method comprises the following steps: establishing a quantitative relationship of simulation resolution, antenna characteristics, satellite parameters and grid interval, taking the constraint that the central angle interval is greater than or equal to the maximum sampling interval, calculating the grid interval according to the latitude and longitude interval calculation formula, and segmenting the ground grid. The application has the advantages that: the simulation result obtained is better than the result of the traditional time-domain extrapolation method, for the interference scene among large-scale constellations, the maximum I / N value obtained has an error of less than 0.1 dB compared with the result of the traditional time-domain extrapolation method; the I / N overrun probability obtained has an error of less than 2% compared with the result of the traditional time-domain extrapolation method.

This application belongs to the field of power system grounding grid safety technology, specifically relating to a method, device, medium, and equipment for detecting the health status of a grounding grid. The method includes: collecting multi-dimensional heterogeneous data of the grounding grid to be detected, wherein the multi-dimensional heterogeneous data includes electrical data, chemical data, physical data, and excitation response data; preprocessing the multi-dimensional heterogeneous data; constructing a grounding grid health status detection model and training the model; and inputting the preprocessed multi-dimensional heterogeneous data into the trained grounding grid health status detection model to detect the health status of the grounding grid to be detected. This application, through multi-dimensional data fusion and intelligent model analysis, can achieve early and accurate diagnosis of the grounding grid health status and precise fault location.

The embodiment of the application relates to the field of new energy power generation control of a power system, in particular to a photovoltaic array ground fault rapid detection and positioning device, which comprises a fault signal acquisition unit, a fault feature extraction unit, a distributed positioning unit and a main control unit; wherein the fault signal acquisition unit covers different areas of a direct current bus and a grounding net through double-interface synchronization, ensures the comprehensiveness of fault feature information acquisition, the fault feature extraction unit generates standardized characteristic values based on multidimensional global parameters, avoids the limitation of single impedance parameter analysis, and the distributed positioning unit realizes full-link coverage of head and tail ends and intermediate nodes through a component string multi-node interface, can accurately lock the specific component string and node position where the fault is located after receiving a positioning instruction, and solves the pain point that the prior art can only preliminarily identify a fault area and cannot meet precise operation and maintenance disposal.