1070 results about "Branch line" patented technology

A prefabricated building production line and a prefabricated building structure. The prefabricated building production line comprises an assembly conveyor line, a functional module conveyor line, a transfer mechanical arm, an assembly mechanical arm, and a control platform; an assembly area, a testing area, and an inspection area are arranged in order along a transport direction of the assembly conveyor line; the assembly conveyor line is used for conveying a building unit main body to be assembled; a plurality of functional module conveyor branch lines are arranged at the side of the functional module conveyor line away from the assembly conveyor line; the functional module conveyor line and the functional module conveyor branch lines are used for transporting a functional module; the transfer mechanical arm is used for carrying a functional module and the building unit main body to be assembled; and the assembly mechanical arm is used for installing the functional module on the building unit main body to be assembled. The prefabricated building structure comprises: a lifting device for prefabricated building installation, an prefabricated building ventilation structure, a prefabricated building automated production fixture, etc.

The invention relates to the technical field of power distribution network fault positioning, and provides a power distribution network multi-branch line fault positioning method and system based on time domain difference. The power distribution network multi-branch line fault positioning method based on time domain difference comprises the steps of obtaining a fault traveling wave line mode component based on fault traveling wave data, and performing discretization; performing time domain difference operation on the discretized fault voltage traveling wave line mode component, eliminating a sine component, and obtaining a fault traveling wave line mode component signal; constructing an objective function, optimizing a fault traveling wave line mode component signal, and determining a time domain position of a fault traveling wave head to calibrate arrival time of the fault traveling wave head; and if the fault is the trunk line fault, establishing a first fault point reflection wave time sequence constraint based on the basic parameters and the fault section of the fault line in combination with the fault traveling wave head arrival time, and determining the fault point reflection wave head arrival time so as to determine the position of the fault point. The calculation speed and reliability of fault positioning are improved, and the cost is reduced.

The invention relates to an electrical variable adjustment monitoring method and system for a distribution box, and the method comprises the steps: collecting the current, voltage, power factor and other core electrical variables of each distribution box in a region in real time, triggering an abnormal mark through dynamic gradient analysis, and recording time-space information; performing space-time correlation analysis based on the power distribution network topological graph, calculating an abnormal time concentration ratio and a spatial distribution density, and generating a correlation circle; determining a fault type (a local problem or an overall power grid problem) according to the characteristics of the associated circles, the number of branch lines and the change of electrical variables, and matching a corresponding processing scheme; and continuously monitoring a fault processing result, and generating a repair report until the system is stable. The system comprises a core electric variable real-time acquisition module, a power distribution network topological graph analysis module, a fault type judgment module and a fault processing monitoring module. According to the method, the anomaly detection accuracy and the fault processing efficiency are improved, and reliable operation of the power distribution network is guaranteed.

The invention provides a multi-modal communication edge aggregation gateway system for a virtual power plant, and the system comprises a smart energy unit which serves as edge gateway equipment and is used for carrying out the bidirectional communication with a user branch load, a distributed energy source and a flexible load; the measurement monitoring unit is arranged on a user branch load loop or a user side equipment end and is used for acquiring power utilization data of a branch line and an equipment operation condition; a multi-mode communication module; and the self-adaptive protocol switching unit is used for dynamically selecting communication protocols and realizing switching among the protocols according to the communication environment parameters, the equipment types and the data transmission requirements. The invention thoroughly solves the problem that the traditional communication system cannot adapt to different application scenes and equipment type communication requirements by adopting a single communication protocol, realizes the goal of dynamically adjusting the communication strategy according to the network environment change, and effectively avoids the phenomenon that the communication quality is reduced or even interrupted.

The invention discloses a graph topology-based power distribution network protection parameter automatic checking method and system, and belongs to the technical field of power transmission and distribution. The method comprises the steps of obtaining a transformer substation outgoing line protection constant value, a terminal protection constant value, line zero-sequence current data, a topological relation below the transformer substation, line parameters and operation state data of lines, switches and distribution transformers; sVG analysis and power distribution network topological graph construction are carried out; subgraph extraction and hierarchy analysis; line parameter and protection constant value verification, including line parameter verification and protection constant value verification; the line parameter verification comprises branch line segment verification and switch position verification; the protection constant value verification comprises overcurrent I section verification, overcurrent II section verification and zero sequence protection verification. According to the method, automatic checking of the power distribution network protection parameters is realized, the checking efficiency and accuracy are greatly improved, and the method is suitable for a protection constant value checking scene of a complex power distribution network.

The invention relates to the technical field of heat supply control, in particular to a heat supply secondary network branch line intelligent hydraulic equilibrium method and device, a medium and a product. The method comprises the following steps: constructing a branch topological graph of a heat supply secondary network in a target heat supply area; the environment temperature is obtained in real time, the heat supply station is controlled to supply heat to each heating single body in the target heat supply area based on the dynamic flow control strategy, and the node flow and the node temperature of each node in the branch topological graph are collected; constructing a branch heat supply loss model of the branch topological graph based on the environment temperature, the node flow and the node temperature; the monomer temperature and heat supply backflow data of each heating monomer are obtained, and a monomer heating model is constructed for each heating monomer based on the environment temperature, the monomer temperature and the heat supply backflow data; and determining a flow regulation and control strategy based on the monomer heating model and the branch line heat supply loss model, and adjusting the monomer heat supply flow of the heat supply secondary network based on the flow regulation and control strategy. According to the method, heat supply hydraulic balance can be achieved through precise flow regulation and control precision.

The invention provides an electric pile assembly line which comprises a preassembling branch line, a material preparation mechanism, a transfer mechanism and a final assembly branch line, the preassembling branch line is adjacent to the final assembly branch line, the material preparation mechanism is arranged at one end of the final assembly branch line, the transfer mechanism is located between the final assembly branch line and the material preparation mechanism, and the material preparation mechanism is used for storing diaphragms, bipolar plates and sealing gaskets. The preassembled branch lines are used for assembling the liquid flow frames, the partition plates and the blankets to form electrodes; the transfer mechanism is used for transferring the diaphragms, the bipolar plates, the sealing gaskets and the electrodes on the adjacent preassembled branch lines to the final assembly branch lines so as to stack the diaphragms, the bipolar plates and the sealing gaskets to form an electric pile. According to the invention, the distances between the transfer mechanism and the material preparation mechanism, the general assembly branch line and the adjacent pre-assembly branch line are equivalent, so that bipolar plates, sealing gaskets and diaphragms on the material preparation mechanism and electrodes on the pre-assembly branch line can be well transferred and stacked on the general assembly branch line to form an electric pile, the space layout is reasonable, the occupied production space is small, the cost is reduced, and the production efficiency is improved. The production efficiency is improved.

The invention provides a deicing device for split conductors and a control method. The deicing device comprises a supporting assembly, an elastic impact assembly, a monitoring module and a control module. Wherein the supporting assembly is installed between any two branch lines of the split conductor, the elastic impact assembly is fixed on the supporting assembly, the impact direction of the elastic impact assembly faces any branch line, the monitoring module is fixed on any branch line, and the monitoring module is used for monitoring the icing condition of the branch line. The control module is fixed to the supporting assembly and electrically connected with the monitoring module and the elastic impact assembly, and when the monitoring module monitors that the branch line starts to be iced, the elastic impact assembly is adjusted to be in an elastic energy storage state; and when the monitoring module monitors that the icing condition on the branch line exceeds a preset threshold value, the elastic impact assembly in the elastic energy storage state is released to impact the split conductor for deicing, so that the purposes of automatic triggering of the deicing device and long-term stay line deicing are achieved, and the safety and stability of the power transmission line are ensured.

The utility model discloses a branch line drainage wire clamp, comprising a wire clamp main body and a clamping mechanism, the wire clamp main body comprises a clamping part and a lead wiring part which are in a U-shaped structure, and the branch line drainage wire clamp also comprises a fixing plate and a fixing screw rod. A T-shaped sliding groove is formed in the back face of the clamping part, a first fixing ring is arranged at the top of the fixing plate, and a T-shaped connecting part matched with the T-shaped sliding groove is arranged on one side of the fixing plate. A first screw hole and a second screw hole are formed in the fixing plate and the sliding groove respectively and connected through a fixing screw, and a second fixing ring is arranged on the top of the screw. The clamping mechanism comprises a screw, a clamping block and an operating rod, and an operating handle with a through hole is fixed to the bottom of the operating rod. Silver-based coatings are arranged on the clamping blocks and the clamping parts, and salient points are arranged on the surfaces of the coatings. The lead wiring part and the clamping part are obliquely arranged, and a torque bolt is arranged on the side face of the lead hole. According to the design, through the adjustable fixing plate and the fixing screw rod, the installation flexibility and adaptability are improved, the maintenance work is simplified, and the conductivity and stability are enhanced through the design of the silver-based coating and the protruding points.

Examples relate to flexible datacenters or other power loads tolerant of intermittent operation and configured to use power received behind-the-meter. A system may include a transportation hub electrically coupled to a BTM power source via a branch line. The transportation hub may receive behind-the-meter (“BTM”) power from the BTM power source. The system may also include a datacenter control system configured to modulate power delivery to the transportation hub based on a set of monitored conditions. The set of monitored conditions may include BTM power availability at the transportation hub. In some examples, the datacenter control system is a remote master control system positioned remotely from the transportation hub.

The invention discloses a method for improving the power load following flexibility of a pressurized water reactor, which comprises the following steps: arranging a bypass branch line on a steam bypass pipeline on the secondary side of a steam generator, and arranging a heat energy storage device on the bypass branch line; steam on the secondary side of the steam generator is shunted into the heat energy storage device in proportion through a bypass branch line; when the power load is low, secondary side steam of the steam generator is introduced into the heat energy storage device for heat storage; when the power load is high, the heat energy storage device releases stored heat and heats condensed water, and generated steam is output from the heat energy storage device to be used for power generation. The method does not reduce the operation power of the nuclear reactor, does not cause energy waste, can cope with the mismatching between the power supply and the power demand, maintains reliable energy distribution, and improves the power load following flexibility of the pressurized water reactor.

The invention discloses a pre-meter branch line electric leakage fault positioning method and device, a storage medium and a product. The positioning method comprises the steps of obtaining a transformer area total meter voltage, a user electric meter voltage, a user electric meter active power and a user electric meter reactive power in a measurement period; the virtual impedance of the user is solved; extracting global correlation features and adjacent correlation features of the user virtual impedance; calculating the symmetric relative entropy of the global correlation characteristics and the adjacent correlation characteristics according to the extracted global correlation characteristics and the extracted adjacent correlation characteristics; calculating a comprehensive abnormal score of the user virtual impedance according to the user virtual impedance and the symmetric relative entropy; and carrying out electric leakage fault positioning according to the comprehensive abnormal score of the user virtual impedance. The electric leakage fault positioning efficiency is improved, and the operation and maintenance work efficiency of the low-voltage power distribution network is effectively improved.

The utility model provides a preparation subpackaging device which comprises a main pipeline, branch pipelines, a driving pump and an exhaust pipe, the near end of the main pipeline is communicated with a stock solution bag, a plurality of branch pipelines are communicated with the main pipeline, one of the branch pipelines is communicated with the far end of the main pipeline, each branch pipeline is independently provided with a subpackaging valve and a subpackaging container, and the driving pump is communicated with the exhaust pipe. The driving pump is arranged on the main pipeline between the branch pipeline and the stock solution bag, the exhaust pipe is arranged on the main pipeline between the driving pump and the stock solution bag, a main valve is arranged on the main pipeline between the exhaust pipe and the stock solution bag, and an exhaust valve is arranged on the exhaust pipe. According to the preparation split charging device, only one exhaust pipe is arranged, contact with outside air is reduced, the risk that microorganisms pollute a pipeline is reduced, the split charging amount is controlled through the weighing sensor, the split charging uniformity and accuracy can be ensured, high-speed split charging is achieved, residual preparations in the pipeline can be emptied to be recycled, and the production efficiency is improved. And waste is reduced.

The utility model provides a branching device for a distribution box, which relates to the technical field of distribution boxes and comprises a distribution box body, one side of the distribution box body is provided with a wire inlet hole, the rear inner wall of the distribution box body is provided with a bunch adjusting mechanism, and the bunch adjusting mechanism comprises a fixed support. The two fixing supports are symmetrically distributed and fixedly connected with the rear inner wall of the distribution box body, the front faces of the fixing supports are fixedly connected with limiting plates, the upper ends of the limiting plates are provided with limiting grooves distributed in a linear array mode, the front faces of the fixing supports are provided with movable sliding grooves, and the inner walls of the movable sliding grooves are slidably connected with movable sliding blocks distributed in a linear array mode. Through the bunch adjusting mechanism, the branching cable can be conveniently clamped, cables of different sizes can be stably clamped, the application range is wide, the branching cable is independently locked, the situation of batch movement and dislocation during adjustment is avoided, the operation is convenient, and the practicability is high. And the wiring efficiency is greatly improved.

The invention belongs to the field of display, and particularly relates to a driving module and a display device.The driving module comprises a data driving unit, selecting units, a polarity partition detecting unit, a voltage adjusting unit and an input control unit, and the selecting units comprise the first selecting unit and the second selecting unit; the first selection unit is connected with the first signal line through a first branch line and a second branch line, the second selection unit is connected with the second signal line through a third branch line and a fourth branch line, the at least one voltage regulation unit is arranged on the fourth branch line, and the input control unit is connected with the polarity partition detection unit. In a polarity symmetry mode, the first branch line and the fourth branch line form a group, the second branch line and the third branch line form a group, and data voltage is alternately output line by line. As the fourth branch line outputs the lowered data voltage, the brightness of the green sub-pixel controlled by the data line connected with the fourth branch line is reduced, the color cast can be improved or eliminated, and the display image quality of the display panel is improved.

The invention relates to the technical field of data mining, in particular to a mining analysis method and system for vehicle wire harness fault data, and the method comprises the following steps: extracting a maintenance timestamp and a path segment index to construct a two-dimensional coding matrix, carrying out the segment division of a vehicle operation mileage, generating a total number of segment faults and a probability sequence, and carrying out the mining analysis. And executing logic comparison according to the serial numbers of the node major loop and the branch line, configuring a path weight parameter, executing tensor operation on the probability sequence and the weight parameter, obtaining an aggregation degree parameter, and constructing a mining analysis result. According to the method, a data multi-dimensional space topological structure is remodeled, dynamic recession mapping is calculated to capture a deep derivation relation, a probability sequence and a weight parameter are input into a sensing network to execute feature extraction, an aggregation degree index is obtained, and according to feature collection operation, space associated conduction paths of wire harness state degradation at different positions are deeply mined. And a fault data mining analysis system with a network deep topology feature analysis capability is formed.

The invention discloses a medium and low voltage line abnormity identification method based on a deep neural network, and the method achieves the comprehensive coverage of key nodes of a power distribution network through the four-stage deployment of station-line-transformer-household, completely captures the abnormal signals at the tail end of a branch line, provides sufficient data support for deep feature learning, solves a problem of a conventional monitoring blind area, and improves the recognition precision of the power distribution network. A convolutional neural network (CNN) and long short-term memory (LSTM) network mixed model automatically extracts time-frequency domain joint features, manual feature design is not needed, subtle changes of transient waveforms are effectively captured, the anomaly identification precision is improved, the limitation that a traditional method depends on artificial experience is broken through, potential fault hidden dangers can be found in advance, sufficient processing time is won for operation and maintenance personnel, and the operation and maintenance efficiency is improved. Through rapid positioning, the fault processing period is shortened, the power failure time is reduced, the power supply reliability is improved, fuzzy C-means clustering is combined with topology analysis, accurate positioning of abnormal sections is achieved, the manual inspection workload is reduced, the fault processing efficiency is improved, and the operation and maintenance cost is reduced.

The embodiment of the invention provides a distribution network line fault positioning method and system, and the method comprises the steps: determining a fault phase, and calibrating a fault moment; dividing the multi-branch line into a line partition and a branch line partition based on the distribution network topology; screening a target fault phase, calculating a fault phase current difference of adjacent detection points, and calculating a current abrupt change rate based on the fault phase current difference of the adjacent detection points; according to the arc suppression coil type and the fault transition resistance value, performing fitting to generate a partition threshold value; a suspected fault section is obtained according to the section threshold initial judgment section; calling a current abrupt change rate time sequence curve of upstream and downstream nodes of the suspected fault section, and checking a current difference amplitude change trend before and after the fault; for multi-branch topology, interference is eliminated through relevance of current abrupt change rates of a main line and branch lines, and finally a target fault section is locked. According to the invention, the problems of weak fault characteristic quantity and poor positioning reliability in a small current grounding mode can be effectively solved.

To enable a user to access a station without crossing a track.SOLUTION: This track traffic system comprises a track including a travel path with which a running wheel can come into contact, and a guide rail that guides a traveling direction of a vehicle by being in contact with a guide wheel outside the running wheel in a width direction. The track includes a plurality of single-line station sections in which a first travel path which is the travel path is disposed and which has a station facing only the first travel path, a double-line section in which the first travel path and a second travel path which is the travel path disposed in parallel with the first travel path to move the vehicle in a reverse direction of the first travel path are arranged, and a branch section which has a branch path for changing a travel destination of the vehicle between the first travel path and the second travel path and which is adjacent to the single-line station sections. The guide wheel is disposed only on one side in the width direction with respect to the vehicle body.SELECTED DRAWING: Figure 1

The invention discloses a power distribution network branch line fault line load transfer method and system, and relates to the technical field of load transfer, and the method comprises the steps: collecting the voltage and current data of a power distribution network in real time, locating a branch line fault point based on the voltage and current abrupt change characteristics, controlling the nearest upstream and downstream section switches to trip, and isolating a fault section; constructing a multi-layer topological structure by taking the first section switch at the downstream of the fault point as a starting point; on the basis of upstream available section switches, calculating an electrical distance path, screening candidate switches meeting topological connectivity constraints, and selecting the section switch with the shortest electrical distance and meeting the total load requirement as a main transfer supply source; when the capacity of the main transfer supply source is insufficient, a capacity gap is calculated, the suboptimal section switch is selected, and a parallel transfer path of the main transfer supply source and the suboptimal section switch is formed. The method has the advantages that by accurately positioning the fault point, constructing a multi-layer topological structure and intelligently selecting the load transfer source, the load is quickly and reliably transferred, and the emergency response capability of the power distribution network is improved.

The invention discloses a one-kiln two-line production process for energy-saving glass, and relates to the technical field of energy-saving glass plate production. A shunting pressure stabilizing chamber, a central partition wall and an electromagnetic-platinum combined stirring device are arranged at the tail end of a melting furnace, and are matched with prolonging of clarification residence time and a microbubble bubbling device, so that a highly uniform temperature field and component distribution can be obtained before molten glass enters a feeding channel, and bubbles and inclusions are fully eliminated. By means of the collaborative measure, the melt cleanliness is remarkably improved, optical defects such as stripes, stones and white points in the subsequent forming process are greatly reduced, and the appearance and the physical strength of a finished product are more reliable. By means of the Y-shaped double feeding channels and the independent temperature control tin bath, ultra-thin glass and medium-thickness glass can be produced at the same time in the same melting furnace and do not interfere with each other. The main line focuses on the flatness and the optical quality of the energy-saving glass of the building curtain wall, and the branch line focuses on the thickness control and the surface smoothness of the ultrathin energy-saving glass.

A control method is for a compressed air supply system with which a control device is associated. The method includes: receiving via the control device a supply demand, activating a compressed air generator to provide compressed air at a compressed air connection when the control device receives a supply demand, identifying a regeneration execution time depending on the supply demand and / or a degree of saturation of an air dryer, activating a switching valve to open a branch line when the control device identifies a regeneration execution time, and returning compressed air from the branch line counter to a filling direction through a pneumatic main line to regenerate the air dryer. A control device is for carrying out the method. A vehicle includes such a control device.

The utility model provides a plug-in type intermediate relay which comprises an insulating shell and a control coil, the upper end of the left side of the insulating shell is provided with a group of branching jacks I used for conducting current branching, and the upper end of the right side of the branching jacks I is provided with a plurality of groups of branching jacks II used for conducting current branching. The upper end of the right side of the second branching jack is provided with a group of third branching jacks used for conducting current branching, the middle position of the insulating shell is provided with a group of plug heads used for facilitating plugging of the relay body, and the front side and the rear side of the interior of the right side of each plug head are each provided with a group of rotation dampers used for limiting power storage rotation of the positioning frame. Compared with the prior art, the utility model has the following beneficial effects: the rotation damping is used to limit the force storage rotation of the positioning frame, the inner insulation spacer is used to carry out protective clamping on the relay main body, the control coil is used to change the working state of the control circuit, and the waterproof embedding seat is used to prevent wet gas from entering.

The invention discloses a branch optical fiber fault detection method, device and equipment and a storage medium, and relates to the technical field of fault detection, and the disclosed branch optical fiber fault detection method comprises the steps: obtaining multi-source data of a branch optical fiber network; the multi-source data is input into a fault analysis model for processing to obtain a fault analysis result, the fault analysis model comprises a time sequence anomaly detection module, a graph neural network reasoning module and a knowledge graph enhancement module, the time sequence anomaly detection module carries out anomaly monitoring on the multi-source data, and the knowledge graph enhancement module carries out graph neural network reasoning on the multi-source data; when abnormal data is detected, the graph neural network reasoning module and the knowledge graph enhancement module are triggered to carry out collaborative root cause analysis; and outputting a fault analysis result. The method can improve the fault detection efficiency of the branch optical fiber.

The invention discloses a side slope three-dimensional deformation monitoring and early warning method and system based on a cascade single-line multipoint crack meter. The method and system are suitable for deformation monitoring and landslide state forecasting of a side slope area without macroscopic cracks. The method comprises the steps that a monitoring main line is planned in a potential slip area in the main slip direction, intelligent fusion nodes are arranged on the main line, multi-direction monitoring branch lines are led out, and a tree-shaped monitoring network is formed; two ends of the main line are anchored in a stable area, and tail ends of the branch lines are fixed on a slope; the node devices synchronously collect relative displacement and three-dimensional attitude data in the main line direction and the branch line direction, a three-dimensional deformation field is built in combination with an early warning model, and landslide state study and judgment and threat range prediction are achieved. The system achieves multi-point and multi-direction displacement monitoring through a tree-shaped structure, has the advantages of being wide in coverage, low in cost, flexible in arrangement and the like, and supports early-stage automatic early warning of slope disasters.

The invention discloses a portable lightning arrester performance detection device and a use method thereof, and relates to the field of lightning arrester detection. The portable lightning arrester performance detection device comprises a direct-current high-voltage generator and a box cover arranged on the direct-current high-voltage generator, a flat cable is arranged between the direct-current high-voltage generator and the box cover, two test main lines are embedded in the flat cable, a placement cavity is formed in the box cover, and the test main lines are arranged in the placement cavity. And a plurality of contact type power connection seats are arranged in the placement cavity in parallel based on the test main line, and each contact type power connection seat can be used for placing the lightning arrester main body and is electrically connected with the lightning arrester main body in a contact manner. According to the portable lightning arrester performance detection device, the multi-station parallel contact type power connection seat is arranged in the placement cavity of the box cover, the test branch line is connected with the test main line, a plurality of lightning arrester main bodies can be placed at the same time, a single detection loop is independently controlled through the change-over switch, and batch detection and station switching are achieved.

The utility model discloses an intelligent sentry early warning system, and relates to the technical field of road safety early warning. The warning module is fixedly connected to one side of the support; the bottom end of the first speed measurement monitoring device is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected with the support, the bottom end of the rotating shaft is slidably connected with a first end-toothed disc in the axial direction of the rotating shaft, and a positioning shaft is arranged in the support; the top end of the positioning shaft is fixedly connected with a second end-toothed disc meshed with the first end-toothed disc, and the outer side of the rotating shaft is sleeved with a spring used for driving the first end-toothed disc to reset. The intelligent sentry early warning system can detect whether vehicles come from a trunk line and a branch line or not and remind the vehicles on the branch line that the vehicles come from the trunk line and slow speed reduction is slow through the warning module, so that traffic accidents are reduced; meanwhile, the angle is convenient to adjust.

The invention discloses a distribution network electric leakage detection method comprising the following steps: obtaining multi-dimensional data of a transformer area, and carrying out data preprocessing and multi-dimensional data linkage analysis to obtain a suspected leakage transformer area; performing ground wire coupling characteristic signal injection on the suspected leakage transformer area, and judging whether electric leakage occurs in the transformer area or not according to signal coupling response; performing characteristic signal injection test on each branch line of the transformer area with electric leakage, and determining an electric leakage branch line; the unmanned aerial vehicle carries out aerial inspection on the electric leakage branch line and collects infrared thermal image data, ultrasonic reflection data and aerial photography visual data of the line; identifying an abnormal position on the line as a candidate electric leakage point; and implementing a mobile electric leakage signal intensity test in the line section corresponding to the candidate electric leakage point, and determining a final electric leakage point according to the front and rear sudden change positions of the electric leakage signal intensity. Real-time or high-frequency electric leakage detection can be carried out, and the position of an electric leakage fault can be found in time.

The invention discloses a synchronous phasor measurement-based power distribution network line parameter estimation method and device, a medium and a terminal, and the method comprises the steps: introducing a model comprising a system error and a random error when a single-branch measurement model is built, and comprehensively considering uncertain factors; therefore, the accuracy and practicability of the multi-branch line measurement model established by the single-branch measurement model are improved, and in addition, the weighted least square method is selected for iteration in iteration, so that the estimation accuracy is further improved. The method comprises the following steps: establishing a single-branch measurement model according to a single-branch pi model and a measurement error; the single-branch pi model is used for representing a single-branch line in the power distribution network line; establishing a multi-branch line measurement model on the basis of the single-branch measurement model; and based on the multi-branch line measurement model, estimating the line impedance of the power distribution network by adopting an iterative weighted least square method.

A phase shifter and an electronic device are provided and belong to the field of communication technology. The phase shifter includes opposite first and second substrates; a tunable dielectric layer therebetween. The first substrate includes a first dielectric substrate; first and second transmission lines on a side of the first dielectric substrate close to the tunable dielectric layer; the first transmission line includes a first main line and at least one first branch connected to a side of an extending direction thereof; the second transmission line includes a second main line and at least one second branch connected to a side of an extending direction thereof; the first and second main lines are arranged side by side with a first gap therebetween. The second substrate includes a second dielectric substrate and a first electrode layer on a side of the second dielectric substrate close to the tunable dielectric layer.