182 results about "High voltage transmission lines" patented technology

A multi-source spatio-temporal data fusion signal processing system based on a high-elasticity transmission conductor comprises a high-elasticity intelligent transmission conductor body and a low-noise light amplification system, and a multi-source data real-time fusion and intelligent processing method is used in the multi-source spatio-temporal data fusion signal processing system. The high-elasticity intelligent power transmission conductor body is a heat-resistant aluminum alloy stranded wire; the high-elasticity intelligent power transmission conductor body is combined with an optical fiber sensing technology and a meteorological technology to form a point, line and surface combined low-cost wide-area multi-element sensing technology, and a signal processing technology for mining wind dance characteristic parameters by virtue of a deep network and realizing multi-source spatio-temporal data fusion by virtue of big data association analysis is adopted, so that the understanding degree of field monitoring data is improved; the value of the multi-element sensing big data is excavated, and objective scientific basis and theoretical basis are provided for safe operation, efficient management and intelligent decision making of the ultra / extra-high voltage transmission line. The device is good in stability, large in bearing current, high in safety, low in cost and capable of reducing carbon emission, and has remarkable economic benefits and social benefits.

The invention relates to the technical field of power transmission line control, in particular to a self-adaptive optimization control system for an ultra-high voltage power transmission line, which comprises a corona effect monitoring and environment sensing module for monitoring and acquiring a corona discharge condition in the power transmission line in combination with a multi-point distributed sensing network and collecting meteorological data in real time; the self-adaptive voltage and electric field control module is used for dynamically adjusting the voltage level of the power transmission line through a self-adaptive voltage adjusting algorithm according to the corona discharge condition and the meteorological data; the corona power loss calculation module is used for analyzing the electric field intensity, the air ion density and the noise level of the power transmission line through a nonlinear model, calculating the power loss caused by the corona effect, generating a dynamic corona loss prediction curve, and finely adjusting the adjusted voltage level in the adaptive voltage and electric field control module; according to the method, the calculation of the power loss is more accurate, the corona effect monitoring precision is improved, and the risk caused by sudden intensification of the corona effect can be effectively avoided.

The invention discloses a method and a system for optimizing an intelligent ice melting device of an ultra-high voltage transmission line, which are applied to the field of transmission line maintenance, and comprise the following steps of: analyzing and processing state data of an iced line to obtain time-domain dynamic data reflecting ice layer thickness and wire temperature change, extracting harmonic components from the time-domain dynamic data, and calculating the ice layer thickness and the wire temperature change according to the harmonic components. Obtaining ice layer state frequency domain distribution data according to the harmonic component, and determining an ice layer state change trend according to the ice layer state frequency domain distribution data; constructing a power transmission line harmonic state space model, and reconstructing the optimized power transmission line harmonic state space model to obtain an ice layer impedance dynamic prediction model; in the actual ice melting process, the operation parameters of the ice melting device are dynamically optimized and adjusted according to the ice layer impedance dynamic prediction model. According to the method, the dynamic characteristics of the ice layer state can be accurately extracted, the ice melting efficiency and accuracy are improved, excessive ice melting or insufficient ice melting is avoided, and the operation safety of the power transmission line is enhanced.

A six-eight split sub-conductor fitting detection robot for an ultra-high voltage power transmission line belongs to the field of nondestructive detection of power transmission lines and comprises a fixed frame and a movable frame moving up and down relative to the fixed frame, the fixed frame is provided with walking wheels moving along a sub-conductor, and the movable frame is provided with an X-ray machine and an imaging plate. The imaging plate can be overturned between the vertical position and the horizontal position in a reciprocating mode, a hanging frame capable of synchronously ascending and descending along with the movable frame is arranged on the fixed frame in a sliding mode, and a telescopic hanging rod with a hook at the end is hinged to the hanging frame. The suspension bracket which ascends and descends synchronously with the movable frame is arranged above the movable frame, the telescopic hanging rod is arranged on the suspension bracket, and when two sub-wires on the lower layer of the four sub-wires in the middle are detected and the movable frame descends to the middle position, the telescopic hanging rod extends out and hooks the sub-wires on the side edges, so that a triangular support for the whole robot is formed; and the wind resistance stability is improved when the middle lower-layer sub-conductor is detected.

The invention discloses a high-voltage transmission line insulator health monitoring method and system, and the method comprises the steps: collecting multi-modal data to construct a data set, constructing a model containing an ITCN time sequence branch and a double-branch U-Net space branch, achieving the cross-modal fusion through an LTSFM module, and carrying out the cross-modal comparison pre-training and the optimization of a multi-task loss function (DiceLoss + WIoULoss + TSCL), thereby achieving the health monitoring of a high-voltage transmission line insulator. And finally, outputting health state classification, fault segmentation masks and degradation trend parameters, and triggering fault early warning when a threshold condition is met. According to the invention, the high-precision real-time monitoring of the weak degradation characteristics of the insulator can be realized, and the edge deployment efficiency and the complex environment adaptability are both considered.

The invention provides a motion control method and equipment for an ultra-high voltage transmission line deicing robot. The method comprises the following steps: receiving initial input information of a target power transmission line, wherein the initial input information comprises the position, the diameter, the length and the icing thickness of the target power transmission line; based on the initial input information and a preset parameter table, a deicing path and a deicing strategy are generated, and the preset parameter table comprises related parameters of deicing strength and vibration frequency corresponding to the icing thickness; the deicing path and the deicing strategy are sent to a robot end to execute a deicing task; first state information, fed back by the robot end, of the target power transmission line in the deicing process is received, wherein the first state information comprises the actual diameter of the target power transmission line, the length of the deiced power transmission line and the overall thickness of the non-deiced power transmission line; and state parameters of the first state information in a preset parameter table are determined, a deicing strategy is adjusted based on the state parameters, and the adjusted deicing strategy is sent to the robot end to continue to execute the deicing task.

The invention provides an ultra-high voltage anti-overturning spiral plain end grounding clamp, and relates to the technical field of power transmission line maintenance equipment, and the grounding clamp comprises an outer frame, one side of which is provided with an opening; the movable clamping block is arranged in the outer frame, and one end of the movable clamping block is connected with the side, opposite to the opening, of the outer frame in a sliding mode; the adjusting screw rod penetrates through the upper part of the outer frame and is in threaded connection with the outer frame, and the lower end of the adjusting screw rod is rotatably connected with the movable clamping block; the upper end of the telescopic rod is connected with the outer frame; and the balancing weight is connected to the lower end of the telescopic rod. The grounding wire clamp has the beneficial effects that the interference of external force is resisted by using the torque generated by the gravity of the balancing weight, so that the wire clamp does not turn over when being influenced by the external force such as natural wind power and the gravity of the grounding wire in the working process of clamping the grounding wire, and can be always kept in a vertical state; the safety and reliability of the automatic grounding work of the ultra-high voltage transmission line are improved, and the risk is reduced.

The invention discloses an insulating pull rod lightweight design method based on a multi-objective optimization algorithm, and aims to solve the problems of heavy weight and heavy workload of a bearing tool in hot-line work of an ultra-high voltage transmission line. The method comprises the following steps: setting electrical and mechanical property parameters of the insulating pull rod; then, a three-dimensional model is built through SolidWorks, and finite element analysis is carried out through COMSOL; then, an optimized data set is obtained through joint simulation of MATLAB, COMSOL and SolidWorks; secondly, establishing a mathematical optimization model, solving by adopting a particle swarm-grey wolf optimization algorithm, and improving the algorithm through Sine-Tent-Cosine chaotic mapping population initialization and a crisscross strategy; and finally performing simulation verification on the optimization scheme. The device is applied to the lightweight design of large-load insulating force-bearing tools, effectively shortens the development period of the tools, saves the production cost, improves the safety coefficient of hot-line work, and remarkably reduces the workload of hot-line workers.

The invention discloses an insulator defect identification method for an UHV power transmission line unmanned aerial vehicle inspection image, and belongs to the technical field of power transmission line inspection. The method comprises the following steps: transmitting a visible light image and an infrared image of an insulator shot by an unmanned aerial vehicle in the inspection process to an edge computing platform on the unmanned aerial vehicle; constructing a double-branch feature extraction network architecture to extract an insulator visible light image feature map and an insulator infrared image feature map; constructing a space-time characteristic interaction module to output a deformation visible light characteristic pattern and an infrared time sequence characteristic pattern; performing feature fusion on the deformed visible light feature map and the infrared time sequence feature map to obtain a fused feature map; inputting the fused feature map into a network model based on an encoder-decoder architecture to output a high-resolution feature map; and performing defect identification based on the high-resolution feature map. According to the invention, autonomous identification of insulator defects in the unmanned aerial vehicle inspection process is realized, and the inspection efficiency and accuracy are improved.

The invention discloses a method for arranging phase-to-phase spacers for galloping prevention and control of an ultra-high voltage transmission line, and the method comprises the steps: building a three-dimensional dynamic model of a transmission line tower line system, which comprises tower and lead parameters, introducing environmental factors such as wind speed, temperature, icing thickness and the like, carrying out the multi-working-condition galloping simulation, and obtaining the displacement response and tension distribution of a lead; analyzing a conductor galloping order based on a simulation result, and determining an amplitude maximum value point, a vibration mode node and an anti-node as spacer priority arrangement points; establishing a nonlinear relation model of the spacing rod arrangement number and the galloping suppression effect, and determining the optimal arrangement number by combining the span and load characteristics; iteratively optimizing an arrangement scheme based on real-time weather and line data by utilizing a genetic algorithm; the reliability is verified through the operation monitoring system, and distributed optical fiber sensing monitoring, unmanned aerial vehicle inspection and fault reconstruction strategies are included. According to the method, the problems of inaccurate arrangement position and uneconomical quantity of a traditional method are solved, the balance between galloping suppression and economical efficiency is realized, and the method is suitable for the ultra-high voltage transmission line of 1000kV and above.

The invention discloses an ultra-high voltage transmission line fault analysis system based on multi-dimensional data, and belongs to the technical field of big data analysis. The method is used for solving the technical problem that the robustness of a system is poor when an existing single-algorithm technical scheme is implemented. Through multi-source data synchronous acquisition and improved EEMD denoising, noise interference of an extra-high voltage line in a complex electromagnetic environment is suppressed; signal characteristics are dynamically tracked through adaptive Kalman filtering, space-time alignment and standardization processing are carried out, dimensional difference and time delay are eliminated, improved wavelet packet transformation, a deep belief network and adaptive morphological filtering are carried out in parallel, multi-dimensional characteristics are dynamically weighted and fused through an attention mechanism, a fault characteristic vector is constructed, and fault diagnosis is carried out. According to the method, efficient extraction and optimization of fault features are achieved, accurate reasoning of fault types and positioning can be achieved through the improved fuzzy Bayesian network, the particle swarm optimization algorithm adaptively updates parameters based on real-time errors, and the adaptive robustness of a complex power grid environment can be effectively improved.

The invention relates to the technical field of ultra-high voltage transmission line maintenance, in particular to a multifunctional defect eliminating robot which comprises a rack, a distance adjusting structure installed on the rack, a line distance adjusting structure installed on the distance adjusting structure and a mechanical arm installed on the rack. The mechanical arm is connected with a defect eliminating tool or a pin supplementing tool; the pin supplementing tool comprises a mounting table, a horizontal displacement structure mounted on the mounting table, a vertical translation structure mounted on the horizontal displacement structure, a pin box mounted in the mounting table, a pin clamping jaw mounted on the vertical translation structure, a pin opening device and a nut clamping jaw, wherein the pin opening device and the nut clamping jaw are mounted at the front end of the mounting table. And the nut clamping jaw is positioned above the overhead device. Therefore, the multifunctional defect-eliminating robot is used for solving the technical problem that the prior art mostly stays at the inspection or foreign matter cleaning stage, and although some devices and technologies can perform repairing work, the repairing work is mostly single.

The invention provides an ultra-high voltage anti-overturning grounding clamp, and relates to the technical field of power transmission line maintenance equipment, the ultra-high voltage anti-overturning grounding clamp comprises two clamping plates, the clamping plates are bent plates, the middle parts of the two clamping plates are rotatably connected, and the inner sides of the two clamping plates are provided with oppositely arranged contact surfaces; the driving ropes are respectively connected with the upper ends of the two clamping plates; the telescopic rod is connected to the lower end of one clamping plate; and the balancing weight is connected to the lower end of the telescopic rod. The grounding wire clamp has the beneficial effects that the interference of external force is resisted by using the torque generated by the gravity of the balancing weight, so that the wire clamp does not turn over when being influenced by the external force such as natural wind power and the gravity of the grounding wire in the working process of clamping the grounding wire, and can be always kept in a vertical state; the safety and reliability of the automatic grounding work of the ultra-high voltage transmission line are improved, and the risk is reduced.

The invention discloses a high-voltage transmission line iron tower, relates to the field of line iron towers, and solves the problem of easy recovery of pedal rods in climbing of existing line iron towers. The invention comprises: a tower base and four support frames fixedly installed on the top of the tower base in a centrally symmetrical distribution, a guardrail fixedly installed between adjacent support frames, a plurality of support plates distributed at equal intervals installed on the outer side of the support frame, the inner side of the support plate is a hollow structure, and a plurality of pedal rods distributed at equal intervals are arranged on both sides of the support plate; the invention also comprises: a rod collection mechanism for storing and releasing the pedal rods, and the rod collection mechanism is installed on the inner side of the support plate; the invention can swing a plurality of pedal rods outwards through the rod collection mechanism, so as to facilitate the staff to step on and climb, and can store a plurality of pedal rods at the same time, without adjusting the position of the support plate, thereby solving the problem of easy recovery of the pedal rods in climbing, and achieving the effect of facilitating climbing and storing protection.

The invention discloses an ultra-high voltage transmission line risk fuzzy comprehensive assessment method and device based on AHP-CRITIC, and the method comprises the steps: selecting a corresponding ultra-high voltage transmission line risk assessment index according to the ultra-high voltage transmission line risk, and determining the ultra-high voltage transmission line risk assessment index as a quality assessment factor set for risk assessment, determining a multi-level fuzzy comment set according to the risk of the ultra-high voltage transmission line; calculating subjective weights of evaluation indexes based on an AHP method; calculating objective weights of evaluation indexes based on a CRITIC method; calculating a comprehensive weight in combination with the subjective weight and the objective weight; and performing risk fuzzy comprehensive assessment on the ultra-high voltage transmission line in combination with the comprehensive weight. The ultra-high voltage transmission line risk fuzzy comprehensive assessment method based on AHP-CRITIC is efficient and accurate, and meets actual application requirements.

The invention discloses an OPGW optical cable sag calculation method based on a catenary equation and Brillouin distributed optical fiber sensing. The OPGW optical cable sag calculation method comprises the following steps of obtaining coordinates of towers at two ends of a span, tower heights, a span horizontal length Lh and a span height difference h; measuring the length Sf of the optical fiber in the span by adopting a Brillouin distributed optical fiber sensing technology, and converting the actual suspension length Sc of the optical cable according to the preset excess length ratio eta of the optical fiber to the optical cable structure; establishing a catenary equation with height difference correction; the sag f is defined as the vertical difference between the highest point and the lowest point of the optical cable, and a sag value is output and compared with a preset safety threshold value; and inputting a calculation result into a monitoring platform to realize real-time display and storage. Long-distance, high-precision and continuous on-line monitoring is realized, and the system is suitable for operation state evaluation and safety early warning of OPGW optical cables of ultra-high voltage transmission lines, mountainous areas or plateau lines.

The invention relates to the technical field of ice melting intermittent deicing risk assessment, and provides an ultra-high voltage transmission line ice melting intermittent deicing risk assessment method and system. Performing icing form evolution analysis according to the split conductor icing point cloud data and the environmental meteorological data to obtain an icing form change trend of regional icing form change trends including different attachment regions of each sub-conductor; and according to the icing form change trend of each sub-conductor, performing icing shedding analysis to obtain a corresponding conductor icing shedding risk value, and summarizing the conductor icing shedding risk values of the sub-conductors to obtain a corresponding risk assessment result. According to the invention, a dynamic evolution analysis mechanism for the ice coating form of the ice-melting intermittent split conductor based on the coupling characteristics of the environmental meteorological data and the ice coating form change can effectively improve the accuracy and efficiency of the ice coating falling risk assessment of the split conductor.

The invention discloses an intelligent response type ultra-high voltage transmission line slope reinforcing and monitoring system, and relates to the technical field of geotechnical engineering and slope protection. A humidity response micro-valve covering layer is formed by compounding a microporous film and a weather-proof film, and a hydrogel micro-valve array is arranged on the inner layer of the humidity response micro-valve covering layer. The shape memory prestress anchoring unit adopts a hollow shape memory anchor rod, a spiral drainage micro-channel is arranged in a cavity, and a strain sensing element is embedded in the cavity. The energy collection and control module collects energy through electromagnetic induction of a power transmission line and slope friction or a piezoelectric device. And the membrane-penetrating self-repairing sealing interface adopts a coating containing microcapsules to perform long-term sealing on the membrane-penetrating point and the welding seam of the anchor rod. The bionic plant-growing module is of a three-dimensional printed bionic root system structure, is aligned to a micro-valve covering layer steam exhaust area and is fastened to the anchor rod. The system can remarkably inhibit rainwater infiltration in rainy seasons, release water vapor under the film in dry seasons and drive prestress adjustment through energy self-sufficiency, so that the long-term stability and durability of the side slope are remarkably improved.

The present invention discloses a method for designing a scaled test model of an ultra-high voltage transmission line. The method determines the scale ratio of the size according to the limitations of the drawings of the real transmission line tower and the test site, retains the main structure of each section of the tower, scales the size of the components accordingly, designs a scaled tower model, determines the load similarity coefficient of the scaled test tower by dimensional analysis, determines the wire diameter according to the parameters of the scaled conductor, and evenly suspends a counterweight on the scaled conductor so that the scaled model and the original model meet the similarity of the wire density, and at the same time makes the load similarity coefficient of the scaled conductor consistent with the scaled tower. Finally, the similarity coefficients of the scaled model and the original model in size, load, frequency, displacement response, etc. are calculated according to the dimensional analysis method. The method of the present invention can restore the relevant features of the appearance and mechanical properties of the real transmission line, so as to explore the damage mechanism of the transmission line icing, dancing, ground settlement, etc. on the conductor, tower, insulator string and other components, and carry out fatigue damage research.

This invention relates to a single-end distributed parameter fault location method for ultra-high voltage (UHV) transmission lines, comprising: acquiring the line parameters of the UHV transmission line under test and determining whether a fault has occurred; acquiring the three-line voltage vector and three-phase current vector of the faulty end of the transmission line, establishing a distributed parameter model of the transmission line, and dividing the distributed parameter model of the transmission line into a fault-side segment model, a fault-opposite-side segment model, and a fault branch model according to the fault region; employing a single-end phasor domain centralized parameter fault location method to solve for the initial values ​​of the fault location and fault resistance; based on the fault-opposite-side segment model, constructing a fault location equation with the fault location and fault resistance as variables, and iteratively solving for the fault location and fault resistance as an optimization problem, as the fault location result. Compared with the prior art, this invention significantly improves the fault location accuracy of UHV long-distance transmission lines.

A distributed ice melting device topological structure suitable for an ultra-high voltage power transmission line comprises a plurality of ice melting sub-modules arranged in a distributed mode, and each ice melting sub-module comprises a single-turn coupling transformer, a metal oxide voltage limiter, a bypass switch, a filter, an H-bridge current converter and a direct-current capacitor. A primary winding of the single-turn coupling transformer is directly formed by split sub-conductors of the ultra-high voltage power transmission line, and a secondary winding of the single-turn coupling transformer is electrically connected with other parts of the ice melting sub-modules, so that the ice melting sub-modules are connected in series on the split sub-conductors of the power transmission line in a distributed manner; the H-bridge current converter is electrically connected with the direct-current capacitor, and the direct-current capacitor provides smooth direct-current voltage for the H-bridge current converter; the filter is connected in series with the H-bridge current converter, the bypass switch is connected in parallel with the H-bridge current converter, and the metal oxide voltage limiter is connected in parallel with the line side output end of the ice melting sub-module; and the ice melting sub-modules adjust the current of the corresponding split sub-conductors by changing the equivalent impedance of the ice melting sub-modules, so that accurate ice melting of the ice-coated split sub-conductors is realized, and the overall current and the transmission power of the power transmission line are kept unchanged. The technical problem to be solved by the invention is to provide the distributed ice melting device topological structure suitable for the ultra-high voltage power transmission line, and the technical problem that the existing ice melting technology cannot realize accurate ice melting and non-power-cut operation on an ice coating section on the ultra-high voltage power transmission line is solved. And normal transmission of the line is affected due to overlarge capacity demand, line overcurrent or incapability of three-phase synchronous ice melting.

The present invention relates to a double-helix low-resistance high-efficiency heat transfer arc extinguishing device, comprising an upper electrode, a lower electrode and an arc extinguishing chamber, wherein one end of the upper electrode forms an upper electrode contact, and the other side is fixedly connected to the upper part of the insulator string ball head, and one end of the lower electrode forms a lower electrode contact, and the other side is fixedly connected to the connection between the conductor of the ultra-high voltage transmission line and the insulator string; the arc extinguishing chamber comprises an arc extinguishing chamber body made of epoxy resin, two spiral arc extinguishing channels are arranged in the arc extinguishing chamber body, and the two ends of the two spiral arc extinguishing channels have a common starting point and a convergence point, the upper electrode contact is fixedly located at the starting point of the two spiral arc extinguishing channels, and the convergence point of the two spiral arc extinguishing channels is fixedly provided with a graphite arc-starting electrode ball, and the graphite arc-starting electrode ball is partially exposed to the arc extinguishing chamber body; the distance between the upper electrode contact and the lower electrode contact is 80-90% of the height of the insulator string. The present invention can reduce operation and maintenance costs and greatly accelerate the extinguishing of the latent power arc after lightning impulse flashover.

The utility model belongs to the field of power transmission line state monitoring, and discloses a power transmission line temperature-vibration integrated monitoring device and system, and the device comprises a housing, and a lead temperature monitoring unit and a vibration monitoring unit based on a fiber bragg grating. The shell is clamped on a power transmission line, and the wire temperature monitoring unit and the vibration monitoring unit based on the fiber bragg grating are both arranged in the shell and used for monitoring the temperature and the vibration frequency of the power transmission line. According to the utility model, the fiber bragg grating sensor is used, a fiber bragg grating is used as a sensitive element, the fiber bragg grating sensor has the advantages of being passive, free of electromagnetic interference and the like, monitoring signals are transmitted back through the OPGW, the communication reliability and safety are high, and the fiber bragg grating sensor is suitable for ultra-high-voltage and ultra-high-voltage transmission lines which need to run in the field for a long time or are located in areas without public network signals and areas with severe field environments. The method is especially suitable for state monitoring by using a fiber grating sensing technology.

The invention discloses a composite porcelain insulator string, and belongs to the technical field of power equipment. The insulator string is mainly formed by compounding an end hardware fitting, a core rod and a porcelain piece sleeved on the core rod. The core is that the fittings are crimped at two ends of the core rod for connection; the core rod is used as a bearing and internal insulation main body; the porcelain piece is provided with the hollow pipe and the umbrella skirts, and the porcelain piece and the core rod are glued into a whole through the insulation paste, so that the creepage distance is effectively increased, the core rod is protected from environmental erosion, and aging and brittle failure of the core rod are prevented. The composite insulator combines the advantages of good mechanical stability of a porcelain insulator and strong bearing capacity of a composite insulator, has excellent electromechanical performance and long-term operation reliability, and is particularly suitable for an ultra-high voltage transmission line.

The invention discloses an extra-high voltage transmission line eight-split cable spacer, and particularly relates to the field of spacers, the spacer comprises a spacer frame body, the inner side of the spacer frame body is fixedly connected with a structure reinforcing member, the top of the spacer frame body is provided with a hoisting assembly, one side of the hoisting assembly is provided with a distance measuring assembly, and the distance measuring assembly is provided with a distance measuring assembly. The two sides of the spacer frame body are provided with serial connection assemblies, the hoisting assembly comprises a fixed plug-in inserted into the top of the spacer frame body, and the outer side of the fixed plug-in is sleeved with a cross-shaped hoisting tool. By arranging the hoisting assembly, connecting the hoisting assembly with the spacer and fixing the spacer through the cable, the safety of carrying the spacer is improved, the physical strength of installation personnel is saved, the overall hoisting assembly is small, production is convenient, the use cost is low, connection between the hoisting assembly and the spacer and connection between the hoisting assembly and the cable are simple and rapid, and the practicability is high. And meanwhile, the conventional spacer is slightly modified, so that the spacer can be popularized and applied in a large range.

The invention provides an electric power construction supervision project-based project quantity metering method, which comprises the following steps of: acquiring geographic coordinate data of an extra-high voltage tower footing position, and extracting topographic and geomorphic diversity characteristics and soil type difference information from the geographic coordinate data through satellite remote sensing image processing, carrying out overlay analysis through a geographic information system to obtain an extra-high voltage tower footing resistance geographic rule distribution diagram; high-voltage electric field interference intensity data generated by an extra-high voltage transmission line around the tower footing is collected, the influence degree of high-voltage electric field interference on tower footing grounding resistance fluctuation is analyzed in combination with the extra-high voltage tower footing resistance geographical rule distribution diagram, and the adjusted tower footing resistance change rate and fluctuation frequency are obtained; and obtaining a tower footing position analysis result from the differentiated reinforcement cage binding amount metering strategy, and optimizing the distribution proportion of the reinforcement cage binding amount in combination with the resistance geographical rule subset to obtain a binding amount meter with optimized resource allocation.

The invention discloses a large-tonnage insulating pull rod joint adhesive and a preparation method thereof, belongs to the technical field of high-voltage insulating materials, and aims to solve the technical problems that an existing large-tonnage insulating pull rod joint adhesive easily generates microcracks and interface layering under long-term electromechanical coupling stress and is difficult to early warn and self-repair. The preparation method comprises the following steps: firstly, synthesizing a polyurea microcapsule containing fluorescent dye tetraphenyl ethylene (TPE), and accurately controlling the wall thickness of the microcapsule through an interfacial polymerization technology to ensure that the microcapsule is broken under specified stress; then, the microcapsules are compounded with bisphenol A epoxy resin, nano montmorillonite and a silane coupling agent, and a curing agent is added to prepare an adhesive; when the adhesive joint is subjected to critical stress, the microcapsule is broken and the fluorescent dye is released, so that damage self-diagnosis is realized; the damage detection sensitivity, the mechanical property and the high temperature resistance of the adhesive are remarkably improved, and a reliable guarantee is provided for hot-line work of ultra-high voltage transmission lines.

The application provides an engineering quantity measurement method based on power construction supervision engineering, comprising: acquiring geographic coordinate data of an extra-high voltage tower base position, extracting terrain and landform diversity features and soil type difference information from the geographic coordinate data through satellite remote sensing image processing, and obtaining an extra-high voltage tower base resistance geographic regularity distribution map through geographic information system superposition analysis; collecting high-voltage electric field interference intensity data generated by an extra-high voltage transmission line around the tower base, combining the extra-high voltage tower base resistance geographic regularity distribution map, analyzing the influence degree of high-voltage electric field interference on tower base grounding resistance fluctuation, and obtaining an adjusted tower base resistance change rate and fluctuation frequency; obtaining tower base position analysis results from a differentiated steel reinforcement cage binding quantity measurement strategy, combining a resistance geographic regularity subset to optimize the distribution proportion of the steel reinforcement cage binding quantity, and obtaining a resource configuration optimized binding quantity measurement table.

The invention discloses a method and a system for determining a corona loss variable quantity of a power transmission line based on 100Hz pure sound. The method comprises the following steps: determining a 100Hz pure sound measuring device and a corona loss measuring device of a wire; in different states, voltages of different grades are applied to the test wire in sequence; acquiring 100Hz pure sound data and corona loss data when different grades of voltages are applied to the test wire through the wire 100Hz pure sound measuring device and the corona loss measuring device; taking the 100Hz pure sound data as a horizontal coordinate and the logarithmic coordinate of the corona loss data as a vertical coordinate to obtain a curve change rule of the corona loss data of the ultra-high voltage power transmission line along with the 100Hz pure sound data, and based on the curve change rule, obtaining the corona loss variable quantity of the 100Hz pure sound power transmission line. The problem that the corona loss of a running power transmission line is difficult to measure is solved.

The present invention discloses a method for improving the heat resistance temperature of pure aluminum conductors, belonging to the technical field of improving the performance of pure aluminum conductors. The method adopts a powder extrusion and sintering process, specifically comprising the following steps: using ethanol and / or dry ice as an anti-forging agent to high-energy ball mill pure aluminum powder to obtain ultrafine pure aluminum powder with an average grain size of 100nm-250nm, a clean surface and high activity, isostatically pressing the ultrafine pure aluminum powder to obtain a preform, hot extruding and sintering the preform to obtain a high-strength aluminum rod, and then subjecting the high-strength aluminum rod to front-end grinding, deburring, heat treatment, wire drawing and annealing to obtain a pure aluminum conductor. The benefits of the present invention are that the yield strength and tensile strength of the prepared pure aluminum conductor are relatively strong, and the heat resistance temperature is increased from the current 200°C to 300°C. It is a high-strength and ultra-heat-resistant pure aluminum conductor, which is expected to be widely used in the construction of ultra-high voltage transmission lines.