215 results about "Overhead power line" patented technology

A low loss transmission system which utilizes a single uninsulated central conducting line segment without any special surface treatment or special enclosing dielectric and having launch devices mounted at each end. The invention provides the use of conductors with circumference approaching and exceeding one wavelength at the propagating frequency. In combination, this invention enables the use of unconditioned and uninsulated conductors and in particular, existing overhead electric power lines which are available worldwide, for the economic and efficient transport of information.

A distributed antenna system having a transport portion including at least one overhead power line for transmitting system information along its length, and a distribution portion including at least one local access point disposed along the length of the power line for providing local access to information transported by the transport portion.

The invention relates to a controller in the robot field, in particular to an embedded intelligent controller applied to an inspection robot for an overhead power line. The inspection robot running along the overhead power line in a long distance firstly needs enough energy supply, and currently, a battery power supply is adopted according to traditional national and international documents, thereby the endurance is limited. For realizing independent inspection, various obstacles, such as stockbridge dampers, suspension insulators, wire clamps, towers, and the like need to be overcome, therefore, a set of navigation system with global positioning capability and a motion control module are needed to realize the free motion of the robot on the line. Accordingly, the invention has the advantages of reasonable design, simple structure, long service life and easiness for popularization, and the robot can freely move and be accurately positioned on the line by the navigation system with the global positioning capability and the motion control module.

A vehicle power source device is provided with an DC/DC converter (4) having a high-frequency insulating transformer (6) that converts power from an overhead power line to DC power, and a CVCF inverter (1) that converts the DC power supplied from this DC/DC converter (4) to AC power; the AC power converted by this CVCF inverter (1) is supplied to equipment such as for on-board lighting.

The present invention relates to a method and system for the determination of parameters related to the speed of wind that blows near an overhead electrical power line (single or bundle conductors). The parameters include an “effective wind speed” as well as an “effective incident radiation” acting on a power line span. The measurement is made by using the combination of mechanical vibrations and movements/positions in two or three dimensions through sensors in direct link with the power line conductor.

The invention discloses a high voltage overhead transmission line power frequency electric field shielding analysis method, which comprises building a physical model for a high voltage overhead transmission line according to the arc sag lowest point, considering the high voltage overhead transmission line at the lowest point as a round transmission line parallel with ground, adopting the physical model as a two-dimension physical model formed by the section of the round transmission line, and utilizing charge simulation method to calculate the electric field intensity at any point of the shielded high voltage overhead transmission line. The invention adopts a simple method to confirm the maximum value of the electromagnetic field distribution of a transmission line in a controllable range of the calculated result, thereby completely considering the safety of the electromagnetic condition around the transmission line in the analysis of the invention, the invention can process the comparative analysis of the line at various condition, can realize the research about the field distribution change of the line under various shielding devices, and can quickly provide an optimization scheme of the shield on the power frequency electric field of a prior overhead high voltage transmission line, to find an ideal overhead line scheme.

The trolley is equipped with three coplanar traction wheels spaced apart along a first longitudinal axis parallel to the live power line and thereabove. The trolley is also equipped with two coplanar pressure wheels spaced apart along a second longitudinal axis parallel to the line and thereabove. The trolley further comprises a traction motor for powering the traction wheels. Finally, the trolley includes a pressure system for maintaining the line pressed between the pressure wheels and the traction wheels, and a control system for controlling the motor. Said trolley has enhanced tractive power. Thus in operation, the trolley is driven along the line whatever the dimension thereof and/or climatic conditions. The invention also concerns a ice removing equipment mounted on the trolley for use on the live power line. The ice removing equipment comprises a clamp band adapted to be opened and closed around the live power line. The clamp band bears blades concentrically spaced and arranged to form a cone opening in the forward moving direction of the trolley.

The invention discloses an overhead power line inspection data collection method based on a flying robot and belongs to the field of power line inspection data collection. The method includes that the multi-rotor flying robot is used as a collection tool for collecting data of power transmission lines and towers and can realize switching between autonomous flying and manual remote control, and the manual remote control is adopted for layered detection, especially in tower inspection. Data of static images and video images are respectively stored in the flying robot and a ground base station, and hierarchical indexed storage is adopted to store the data for the convenience of retrieval inquiry. The overhead power line inspection data collection method based on the flying robot has the advantages that problems of low efficiency and inconvenience in data recording and retrieving of manual inspection, high safety risk and strict personnel requirement of manned helicopter inspection and the like are solved, the inspection collection process is flexible, the body is high in stability, and inspection effect is good especially for towers with complex wire arrangement.

A power distribution monitoring system is provided that can include a number of features. The system can include a plurality of power line sensing devices configured to attach to individual conductors on a power grid distribution network. The sensing devices can be configured to measure and monitor, among other things, current values and waveforms, phase voltage, conductor current, phase-to-phase voltage, conductor temperatures, ambient temperatures, vibration, wind speed and monitoring device system diagnostics. Methods of installing and protecting the system are also discussed.

A thermometer and extensometer for cables and conductors is described. The travel time of one or more acoustic signals along a conductor is used to determine the temperature along the conductor and the length of the conductor. The acoustic frequency is selected to minimize temporal dispersion of the propagating acoustic energy. The technique can be used to measure the temperature and sag of an overhead power line, the temperature of the windings in a transformer, or the temperature of the central conductor in a coaxial power cable.

The invention discloses an overhead power line whole construction process quality control system and method based on a mobile terminal and belongs to the field of data processing. The system comprisesa patrol inspection mobile client and a data center. The patrol inspection mobile client carries out bidirectional data communication with the data center and sends overhead power line construction site information, a location of a patrol inspection terminal and onsite patrol inspection records to the data center. The data center records the overhead power line construction site information, responsible personnel information, construction progress information, whole process digital archives and mobile client smart device identification information and provides overhead power line constructionstatistic data and patrol inspection record query for user terminals comprising the patrol inspection mobile client. Construction information passback and server background data push are carried outthrough a wide area network. An information transmission process is realized rapidly in real time without an error. The interference-free reliable contact between an overhead power line construction site and the data center is realized. The construction patrol inspection process result recording authenticity and reliability are ensured.

The invention discloses an integrated overhung composite insulator string and a method for printing a composite insulator string connecting metal tool by using 3D. The method comprises the following steps of: firstly, generating a three-dimensional CAD (Computer-Aided Design) model of a part in a computer, and printing the three-dimensional CAD model by utilizing a 3D molten-drop printing machine; then slicing up and layering the model according to a certain thickness, converting the three-dimensional information of the part into a series of two-dimensional profile information; melting down metal by using a crucible, and enabling the molten metal to flow out of a nozzle to form molten drops; then accumulating the molten drops layers by layer according to the two-dimensional profile information under the control of the computer so as to obtain a three-dimensional entity part or a part in similar shape. After the method is adopted, a ball-socket series of metal tools is shaped for once directly through the molten-drop 3D printing machine, the connecting cooperation is more reliable and more stable, secondary installation is unnecessary, and the production efficiency is improved; meanwhile, the efficiency of the site construction is provided, and a great influence to the construction of a high-voltage overhead power line is generated.

A Pole Alarm System including an electromagnetic field sensor and collision sensors for detecting overhead power lines and physical obstructions within the intended path of a telescoping mast or utility boom device is disclosed. The present alarm system includes a mast-mounted housing containing the sensors and a microprocessor-based control unit which interprets the output signals of the sensors and provides both audible and control feedback to a safety control module in the vehicle to alert the operator of impending contact and to automatically stop the movement of the mast. The alarm housing also features a light source which provides illumination in the direction of movement of the mast to assist in positioning thereof. The light source also functions as a heating element to prevent the accumulation of ice on the housing which would detrimentally affect the performance of the system. The alarm housing also includes a plurality of Tilt sensors which monitor the orientation of the mast to prevent mast extension if the device deviates from an acceptable range of operation. A system integrated safety control module mounted in the vehicle provides self-test functions and an error code display to alert the operator to the cause of an alarm signal.

The invention discloses a routing inspection flying robot and overhead power line distance prediction and maintaining method, and belongs to the technical field of power line detection. The distance prediction method and the distance maintaining method are included, wherein the distance prediction method includes the steps that geographical position coordinates of a current flying robot are determined, and the actual distance between the flying robot and an overhead power line is calculated; the distance maintaining method includes the steps that (1) real-time fault detection is carried out on the overhead power line by means of a line fault module, and the distance maintaining method is determined intelligently; (2) safety conditions of the flying robot are taken into consideration, and the current safety condition of the flying robot is judged through a safety assessment model; (3) safety self-adaptive dynamic path planning is carried out. According to the method, sensor data are combined with three-dimensional corridor model data, and the distance between the flying robot and the overhead power line is figured out precisely; all kinds of safety factors are considered, and security of the flying robot is assessed; in terms of routing inspection standards of the overhead power line, flying routing inspection paths are planned in real time, and the distance between the flying robot and the overhead power line is maintained.

The invention relates to an electric lead, in particular to a carbon fiber composite core composition and a method for preparing a carbon fiber composite core. The composition comprises high-temperature epoxy resin, a curing agent, an accelerant and carbon fiber. The preparation method comprises the following steps that: the carbon fiber enters a coupling agent sprayer by a creel through a yarn-guide mechanism and a tension control mechanism; a tension controller adjusts the tension; a high-pressure spray head is arranged in the coupling agent sprayer to spray a foggy solvent; the fiber enters a vacuum injection pre-soaking device through the coupling agent sprayer to soak a high-temperature epoxy resin adhesive and then enters a heating molding mould to be cured and molded; the molding mould is divided into three areas for heating, and the three areas are a preheating area, a gelling area and a curing area respectively; the fiber is cured again by a drying cylinder after being cured; and the whole process is continuously driven by a hydraulic driving machine. Compared with the conventional lead, a carbon composite core lead has the advantages of light weight, high strength, low line loss, small sag, high temperature resistance, corrosion resistance, environmental friendliness and the like, and achieves the energy conservation, environmental protection and security of power transmission. The carbon fiber composite core composition and the method for preparing the carbon fiber composite core are widely applied to overhead power lines.

The invention relates to a full automatic laser obstacle clearing system used for an overhead line. The full automatic laser obstacle clearing system comprises a laser body, an industrial camera, a controller, a display screen, a laser distance meter, and a dynamic focusing system. The industrial camera is used to shoot an image of an overhead line waiting for obstacle clearing, and the image of the overhead line is displayed on the display screen in a magnified manner, and observation is facilitated. The laser distance meter is used to test an obstacle distance, and is used to transmit a signal to the controller, and the controller is provided with a determining module and a control module. The determining module is used to determine the position of the obstacle on the overhead line according to the signal of the shot image of the overhead line, and the laser body is used to emit laser to the dynamic focusing system. Under the control of the control module, the dynamic focusing system is used to focus the light on the obstacle, and the obstacle is ignited by the laser, and is burned or gasified. The laser obstacle clearing system is advantageous in that operation is simple, and climbing operation is not required; time is saved, and labor is saved; the accuracy of the laser obstacle clearing system is high, and the laser obstacle clearing system is suitable for the high overhead lines and the small obstacles; costs are low, and safety of operators is guaranteed, and practicability is strong.

The coupler of the present invention couples data signals, such as broadband RF signals, to and from a power line. The coupler of one embodiment that is for use with overhead power lines includes a length of URD MV cable with the neutral conductor removed. Each end of the URD cable is communicatively coupled to the MV power line conductor a predetermined distance from other. The distance between the two connections points on the MV may be related to the wavelength of a carrier frequency used to communicate the data signals. The URD cable may also form part of a transformer to permit the passage of data signals while preventing the flow of the high voltage power signals through the coupler. The neutral semi-conductive jacket of the URD cable may be coupled to ground via a low frequency conductive path.

The invention discloses a robot system for inspection of an overhead power line. The robot system comprises an on-line execution system, a vehicle-mounted portable base station and a ground data management center, wherein the on-line execution system comprises an n-shaped hanging box, a camera, a roller, a protective telescopic shaft and a control driving device; the vehicle-mounted portable base station comprises a remote controller and a portable video terminal; the ground data management center comprises a server and a displayer. The robot system for inspection of the overhead power line, provided by the invention, has the using effects as follows: real-time video communication is realized, omnibearing multi-angle shooting ability is achieved, the problems of corrosion, broken strands, damage and the like of the power line can be accurately detected, and the robot system has an autonomous working mode and a remote control working mode. The robot system self is provided with a battery and the stored electric energy of the robot system can support the robot system to walk for 5 km of lines. The robot system is smooth in running, has the grade ability for climbing the grade of 15 degrees, can reliably span over shakeproof towers and towers on the power line, and has the self-locking ability to prevent accidental falling off.

The present invention is related to a method for detecting and/or measuring atmospheric accretion on a suspended electrical cable span (2) of overhead power lines, said suspended electrical cable span (2) having a sag (D) and a local tension (H), and being submitted to wind pressure (w_wind), comprising the steps of independently:

• • measuring said sag (D), and optionally measuring the wind pressure (w_wind), over a first time range,
  • measuring the local tension (H) over a second time range,

the results of both steps being complemented and/or combined, so that to allow atmospheric accretion detection and/or measurement.

An agricultural vehicle such as a combine is provided with a collapsible agricultural material storage bin. The bin may be collapsed to allow for decreased overall vertical height during transport to avoid contact with obstacles, such as overhead power lines and street lights. In the field, the agricultural material storage container may be expanded to increase the agricultural material holding capacity of the vehicle. The bin may be provided with an internal extension mechanism to increase the lifting power of the container to allow for the placement of a second container or other material thereabove. Alternatively, the container may be provided with an external lifting means to allow for unobstructed evacuation of the interior of the container.

A power failure section can be accurately detected without depending on a loaded state and application of voltage to the overhead power line can be stopped in a short time when a power failure is detected. An electric car controller includes an overhead power line voltage detector (11), a band-pass filter for detecting a ripple component included in the detected overhead power line voltage, a comparator-1 for comparing the level of the detected ripple component with a predetermined reference value Vref1, a rheotome control circuit (16) and a rheotome (3) which judge that a power failure has occurred if the ripple component is judged to be smaller than the reference value Vref1 based on a comparison result obtained by the comparator-1 and disconnect the overhead power line (1) from a VVVF inverter (6), a second comparator-2 for comparing the level of the ripple component with a reference value Vref2 larger than the reference value Vref1, and a brake chopper (8) and a brake chopper control circuit (17) which operate if the ripple component is judged to be smaller than the reference value Vref2 based on the comparison result obtained by the comparator-2 to suppress the increase of the overhead power line voltage.

The invention relates to a method for recognizing an overhead power transmission line from airborne laser point cloud data. The method comprises the following steps of: performing morphological filtering on LiDAR data to obtain a ground feature point data set; dividing the ground feature point data set by a region growing method to obtain a plurality of single ground feature point sets; obtaining a spatial form index of each ground feature point set; and judging the ground feature points with the spatial form index being between 1.08 and 1.23 to be an overhead power transmission line point, and extracting the points. According to the method, the three-dimensional region division is used; the spatial form index used for describing the ground feature spatial form characteristics is designed; and the method for recognizing the overhead power transmission line is provided according to the spatial form index. The method has the advantages that the measures such as point cloud filtering, region growing division, spatial form index evaluation and power transmission line ground feature recognition extraction are used for more completely and accurately obtaining LiDAR power transmission line points; and the method can better meet the practical requirements in aspects of extraction completeness, extraction precision and extraction speed.

The present invention discloses a method for calculating lightning induction voltage of an overhead power line tower. The method mainly comprises the following steps of: (1) calculating a space lightning electromagnetic field while the influence of the tower is taken into consideration, wherein a sub-grid technology based finite-difference time-domain method is adopted in which a coarse mesh is generated for air space and a fine mesh is generated for the tower; (2) applying a two-dimensional calculation result of the lightning electromagnetic field to field decomposition of a three-dimensional space structure formed by an overhead power line and a lightning current return stroke channel, wherein the lightning electromagnetic field is generated by stimulation of lightning return stroke current; and (3) calculating the lightning induction voltage of the overhead power line and extracting the lightning induction voltage of the tower, wherein the lightning induction voltage of the overhead power line is calculated by using an Agrawal model and an FDTD method, and the tower position is located by grid query and the lightning induction voltage of the tower is extracted. The method can be used for effectively and more accurately estimating the lightning induction voltage of the overhead power line and the lightening induction voltage of insulators and lightning arresters of the tower.