468 results about "Ultra high voltage" patented technology

The invention relates to an ultrahigh-voltage silicon carbide start control chip protection method and system, and the method comprises the steps: obtaining the operation parameters and composite structure characteristic data of an ultrahigh-voltage silicon carbide start control chip, and carrying out the TVS-MOSFET hierarchical characteristic analysis, and obtaining the real-time state information of the chip; acquiring a grid charging curve of the ultrahigh-voltage silicon carbide starting control chip, and performing correlation analysis on the grid charging curve and the real-time state information of the chip to obtain a multi-threshold protection parameter; acquiring current change data of the ultrahigh-voltage silicon carbide starting control chip, and performing Miller platform feature analysis on the real-time state information of the chip to obtain a current abnormal trend; performing temperature control construction on a multi-threshold protection parameter and the current abnormal trend to obtain an initial control scheme; and carrying out clamping turn-off strategy construction on the initial control scheme and the potential fault area to obtain a chip start protection strategy. Optimized starting protection of the chip can be achieved through the comprehensive adjustment strategy, and therefore the service life of the chip is effectively prolonged.

The invention relates to the technical field of composite insulator detection, in particular to an autonomous recognition method and system for typical defects of an ultrahigh-voltage line composite insulator, and the method comprises the steps: collecting an inspection image of the ultrahigh-voltage line composite insulator; calculating a temperature rise characteristic coefficient by using the color characteristics in the visible light image and the infrared image and the relationship between the color characteristics and the environment humidity; calculating a defect identification coefficient in combination with the spatial characteristics of the temperature rise phenomenon of the composite insulator; and finally, detecting and identifying typical defects of the composite insulator by utilizing the defect identification coefficient. The invention aims to improve the recognition quality of the typical defects of the composite insulator of the ultrahigh-voltage line.

The invention provides a carbon ceramic resistor and a preparation method thereof, and relates to the technical field of special material production of power systems and electrical equipment. The preparation method comprises the steps that carbon-containing electric conductor raw materials are mixed to obtain a first mixed raw material, and the carbon-containing electric conductor raw materials comprise, by mass, 15 parts of gluconic acid, 10 parts of aluminum oxide and 55 parts of deionized water; performing hydrothermal reaction on the first mixed raw material to obtain a carbon-containing conductor precursor; the carbon-containing conductor precursor is carbonized in a protective atmosphere, a carbon-containing conductor of a core-shell structure is obtained, and the carbon-containing conductor takes aluminum oxide as an inner core and takes a conductive carbon material formed by gluconic acid as a conductive outer shell; mixing the carbon-containing electric conductor with the core-shell structure with a carbon ceramic matrix raw material to obtain a resistor blank; and sintering the resistor blank to obtain the carbon ceramic resistor. The uniformity, the stability and the reliability of the carbon ceramic resistor are improved, so that the carbon ceramic resistor can better meet the application requirements of ultrahigh-voltage and extra-high-voltage alternating-current power transmission systems.

The invention belongs to the technical field of sensors, and particularly discloses a capacitive sensor based on multistage compression deformation and a preparation method thereof, the capacitive sensor comprises an upper electrode layer and a lower electrode layer; a deformable corrugated structure is arranged between the upper electrode layer and the lower electrode layer, and the deformable corrugated structure comprises three deformation areas with the same structure; the deformation area is internally provided with three cavities, and the three cavities are filled with a first dielectric layer, a second dielectric layer and a third dielectric layer respectively; magnetic adsorption units are arranged on the outer sides of the adjacent deformation areas. According to the capacitive sensor based on multi-stage compression deformation and the preparation method thereof, the sensor realizes wide-range and multi-resolution pressure measurement capability; the sensor can present different sensitivity characteristics in different pressure ranges, can flexibly switch working modes, meets various measurement requirements from low pressure to ultrahigh pressure, and solves the technical problem that a traditional capacitive sensor is difficult to consider wide range and high resolution at the same time.

The invention discloses a lead zirconate titanate film material with an ultrahigh voltage coefficient as well as a preparation method and application of the lead zirconate titanate film material, and belongs to the technical field of electronic material development and film materials. The preparation of the lead zirconate titanate film material is realized by adopting a sol-gel spin-coating method and controlling the annealing times. The piezoelectric film material provided by the invention can be directly deposited on a Si substrate coated with metal Pt, does not need to introduce an additional buffer layer or dope any element, is short in annealing time and simple in preparation process, all required raw materials are cheap and easy to obtain, and the piezoelectric film material particularly has high orientation degree, low coercive voltage and excellent ferroelectric and piezoelectric properties, is suitable for preparing large-size (2-4 inches) wafers, and has a wide application prospect. And huge application potential is shown in the field of piezoelectric micro-electro-mechanical system (MEMS) devices.

The invention discloses a melt blending preparation process of a semiconductive shielding material for an ultrahigh-pressure crosslinked polyethylene cable, which comprises the following steps: S1, premixing low-density polyethylene and an ethylene-vinyl alcohol copolymer in proportion, the vinyl alcohol chain segment content of the ethylene-vinyl alcohol copolymer being 25%-45%; s2, performing plasma surface treatment on carbon black, and compounding the carbon black with carbon nanotubes to form a conductive filler system; s3, under the protection of inert gas, adding the matrix resin in the step S1 and the conductive filler in the step S2 into a double-screw extruder in stages, and synchronously adding a hindered phenol and phosphite compound antioxidant; and S4, carrying out segmented mixing under the temperature gradient of 160-210 DEG C. Through synergistic compounding of the plasma surface modified carbon black and the carbon nanotubes and in combination with a staged feeding process, directional dispersion of the conductive filler is realized, a three-dimensional interpenetrating conductive network is formed, and the local electric field homogenization capability of the ultrahigh-voltage cable is remarkably improved.

The invention discloses an ultrahigh-pressure cable outdoor terminal filled with environment-friendly gas, and particularly relates to the technical field of cable installation, the ultrahigh-pressure cable outdoor terminal comprises an inflation installation assembly and a gas supplement installation assembly, the inflation installation assembly comprises a division bar, a film body and a rotating rod, the division bar is fixed to the inner wall of a terminal sleeve, and one side of the division bar is connected with the film body capable of being cut; the rotating rod is rotationally arranged on one side of the inner wall of the film body, and the air supply mounting assembly comprises an arc-shaped film fixedly connected to one side of the groove strip. According to the invention, through the air inflation installation assembly and the air supply installation assembly, automatic quantitative air inflation and air supply installation operation can be completed in the terminal sleeve according to a specified amount, the complexity caused by carrying equipment during outdoor installation is effectively avoided, and the installation efficiency of the cable terminal is greatly improved; therefore, the problem that the installation efficiency of the cable terminal is greatly reduced due to the fact that internal autonomous quantitative operation is difficult to realize because the terminal does not preset the air charging and supplementing functions is solved.

The invention relates to the technical field of power cables, and provides an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable, which comprises an insulated cylinder, a hollow cooling pipe, a metal protection layer, an alarm sounding group, an outer sheath, a male butt joint group and a female butt joint group, one side of each power conductor is provided with a plurality of heat conduction assemblies capable of cooling the power conductor, the heat conduction assemblies are located in the insulating column body, the hollow cooling pipe is arranged in the insulating column body in a penetrating mode and located among the power conductors, and the heat conduction assemblies are all communicated with the hollow cooling pipe; a protection groove is formed in the outer surface of the insulation column body, the metal protection layer is arranged in the protection groove in a sleeved mode, and the multiple alarm sound production sets are arranged. According to the technical scheme, the problem that an environment-friendly ultrahigh-voltage cross-linked polyethylene insulated power cable in the prior art is low in heat dissipation efficiency is solved.

The invention provides a high-voltage test method and device for electrical equipment, electronic equipment and a storage medium, the method is applied to a high-voltage test device, and the high-voltage test device comprises a bearing platform, a frequency modulation and voltage regulation power supply arranged on the bearing platform, an excitation transformer, an adjustable reactor and a capacitive voltage divider. Comprising the following steps: controlling an adjustable reactor and a capacitive voltage divider to be converted from a storage state to a working state on a bearing platform; target electrical equipment is connected to the output end of the adjustable reactor to form a series resonance circuit; a target test item is determined, and the voltage output frequency and the inductance value of the adjustable reactor are adjusted according to preset target test parameters of the target test item, so that the series resonance circuit reaches a resonance state; and outputting a voltage according to the target test parameter, obtaining a test operation parameter of the target electrical equipment, and generating a target test result according to the test operation parameter. According to the invention, the testing efficiency of high-voltage testing of the ultrahigh-voltage electrical equipment can be improved.

The invention relates to the technical field of material detection, in particular to a cross-linked polyethylene insulation material impurity full-detection device and system for a high-voltage cable and application, the detection device carries out detection based on single-row continuous flowing insulation material particles, and the detection device comprises a near infrared spectrum imaging unit, a visible light imaging unit and an image processor, and identifying black spot impurities and heterochromatic particles. The full-detection system provides a detection channel for installing full-detection equipment and comprises a current limiting pipe body and a camera obscura structure, and reflection spectrum and surface color information are collected in the camera obscura structure; the full-inspection system further comprises a buffer stock bin, a finished product stock bin, a pneumatic sorting module, a cyclone separator, a cooling fluidized bed and a metal separator. Impurity identification reliability is guaranteed through double optical detection, full-process online detection of insulation material impurities can be achieved, limitation of traditional sampling detection is broken through, full-detection coverage of insulation material particles is achieved, the impurity missing detection risk is eliminated, and the strict requirement of an ultrahigh-voltage cable for insulation material cleanliness is fundamentally met.

The invention relates to the technical field of cable materials, and particularly discloses a flame-retardant polyethylene sheath material for an ultrahigh-voltage cable and a preparation method thereof.The flame-retardant polyethylene sheath material for the ultrahigh-voltage cable provided by the invention takes low-density polyethylene as a main base material, and the molecular structure of the low-density polyethylene has more long-chain branches; and meanwhile, by adding the composite filler and the auxiliary agent, the prepared polyethylene sheath material has excellent mechanical properties, high and low temperature resistance and flame retardance.

The invention discloses an ultrahigh-voltage power transmission line tower gradient calculation method and device and a medium, and the method comprises the steps: fusing a high-definition camera image with a laser ranging eyepiece image, achieving the quick alignment of a heterogenous coordinate system through a rigid transformation matrix, and precisely capturing the depth information of the feature points of a tower target; a global-local detection model is constructed through cooperative work of a high-definition camera and a laser distance measuring sensor, and calculation complexity is reduced by adopting an SE-R3det network; the device and the medium can realize rapid and accurate tower inclination automatic measurement based on the method. The measurement efficiency is improved, laser ranging is adopted, feedback control is introduced, and automation of the whole process is achieved while the measurement precision is improved.

The method comprises the following steps: uniformly mixing iron phosphate, lithium carbonate, a carbon source and an additive, carrying out grinding and spray-drying to obtain a spray-dried material, carrying out primary sintering on the spray-dried material to obtain a primary sintered product, uniformly mixing the primary sintered material with a lithium source, the carbon source and the additive, transferring the mixture into a furnace, and carrying out secondary sintering to obtain the high-performance lithium iron phosphate cathode material. And carrying out secondary burning in a protective atmosphere, discharging from the furnace after the secondary burning is finished, and carrying out air jet pulverization to obtain a finished product of secondary burning lithium iron phosphate. The ultra-high-pressure solid lithium iron phosphate positive electrode material is prepared by a two-mixing two-firing method, and lithium and carbon are supplemented by a lithium element, a carbon source and an additive; the preparation method has the advantages that the particle size can be inhibited, the effects of repairing a carbon layer, improving the particle morphology, increasing the Li < + > diffusion coefficient and the like are achieved by combining secondary sintering, and indexes such as capacity increasing, voltage efficiency improving, resistivity reducing, iron dissolution and the like can be achieved while the material compaction is improved.

The invention relates to the technical field of transformer substation inspection path planning, and discloses an ultrahigh-voltage transformer substation inspection path planning method and system. According to the method, multi-dimensional monitoring data such as equipment operation state data, environmental parameter data and equipment historical maintenance data of the ultra-high voltage transformer substation are collected, the data are dynamically evaluated, and the equipment operation health degree, the environmental influence factor value and the equipment maintenance urgency degree are generated. And constructing a three-dimensional evaluation space based on the three key indexes, and performing adaptive grid division in the three-dimensional evaluation space. And identifying an optimal routing inspection interval in the divided grids through a density clustering algorithm, generating a routing inspection path sequence according to the optimal routing inspection interval, smoothing the routing inspection path sequence by adopting a path optimization algorithm, and outputting a final routing inspection path scheme. According to the method, multiple factors are comprehensively considered, the scientificity and efficiency of transformer substation inspection path planning are effectively improved, potential problems of equipment can be found in time, and stable operation of the transformer substation is guaranteed.

The invention belongs to the technical field of superconductive phase modifier stators, and relates to a power grid direct connection type ultrahigh voltage superconductive phase modifier stator cable winding fixing method, which is characterized in that a cable is fixed in a groove in segmented non-magnetic teeth, and the end part of the cable is bound and fixed; and the problem of local deformation of the cable winding caused by end electromagnetic stress and vibration can be avoided.

The invention provides circuit breaker assembling equipment for ultrahigh-voltage alternating-current power transmission and an assembling method of the circuit breaker assembling equipment, and belongs to the technical field of circuit breaker assembling equipment. The bottom plate is fixedly connected to the bottom of the top plate, electromagnetic blocks are arranged at the two side ends of the top plate, the top plate, the bottom plate and the two electromagnetic blocks are wrapped with a case, and two grips are fixedly connected to the top of the top plate; the lifting hook is arranged at the bottom of the bottom plate; the adjusting mechanism is arranged between the top plate and the bottom plate, and the winding wheel winds one end of the steel rope through rotation and is used for pulling the modularized circuit breaker parts to ascend and descend through the lifting hook, so that the circuit breaker parts are subjected to three-dimensional space displacement in the case, accurate butt joint between the modularized circuit breaker parts is facilitated, and the practicability is high. Assembly workers are assisted to accurately assemble modularized circuit breaker parts, the assembling difficulty of the modularized circuit breaker is reduced, and the assembling efficiency of the modularized circuit breaker is improved.

The invention provides an ultrahigh-voltage line forest fire early warning method and device based on a two-stage confirmation large model, computer equipment and a medium. According to the two-stage confirmation large model method, accurate recognition of forest fire hidden dangers is achieved through a hierarchical model verification mechanism. The method specifically comprises the steps that after a shot image of an ultra-high voltage line camera is input, NAS Net is adopted for first-layer training, the classification probability is output, and if the probability exceeds a preset fault threshold value, an early warning result is directly output; and when the probability does not reach a threshold value, starting a second-layer converter-based bidirectional encoder representation BERT model to carry out semantic feature retraining, and improving the recognition confidence through secondary probability judgment. According to the method, the problem of high misjudgment rate of a single detection model is effectively solved through two-stage model cooperative verification, multi-dimensional feature cross verification of forest fire hidden dangers is realized, the anti-noise capability of a traditional early warning system on complex environment interference is optimized, and meanwhile, the redundant consumption of computing resources is reduced.

The invention relates to a dielectric elastomer-piezoelectric composite multi-source energy collection device for a non-intrusive electric field sensor, and belongs to the technical field of power system self-powered sensors. The device comprises a base, a dielectric elastomer unit, a piezoelectric cantilever beam, a mass block and a rectification energy storage circuit. The dielectric elastomer deforms under the action of an alternating electric field, the piezoelectric cantilever beam is driven through coupling to generate mechanical vibration, and the piezoelectric layer further converts mechanical energy into electric energy to be output. The resonant frequency of the system is adjusted by setting the mass block, so that the resonant frequency is matched with the external electric field frequency or the environment vibration frequency, and the energy conversion efficiency is optimized. The device can collect external electric field energy in a non-intrusive mode and provide a stable power supply required by a low-power-consumption sensor. The device is compact in structure, high in sensitivity and suitable for electric field monitoring in scenes such as ultrahigh-voltage power transmission lines and transformer substations, and provides reliable energy support for self-powered sensors of power equipment.

The invention discloses a self-repairing anticorrosive paint, a preparation method thereof and an anticorrosive application on the surface of a hardware fitting, the self-repairing anticorrosive paint is composed of a two-component system of a matrix component and a functional component, a composite conductive network formed by multi-walled carbon nanotubes is introduced, ion migration and electric field distortion under a strong electric field can be inhibited, and the electrochemical corrosion rate is reduced; the photo-thermal response type microcapsule can realize near-infrared light triggered in-situ repair of micron-sized cracks, and corrosion medium permeation is avoided; a gradient interface strengthening structure and a nano reinforced phase formed by the nano silicon dioxide can improve the cracking resistance and wear resistance of the coating in a wide temperature range (-50 DEG C to 150 DEG C) and under mechanical vibration, the self-repairing anticorrosive coating is extremely low in corrosion rate in a strong electric field environment, has wide temperature range cracking resistance and micro-crack in-situ repairing performance, and can be applied to the field of high-temperature-range self-repairing anticorrosive coating. And the problems of coating interface stripping, lack of self-repairing capability, high maintenance cost and the like of key metal materials of the ultrahigh-voltage power transmission and transformation equipment in complex climatic environments such as high humidity and high salt are solved.

The invention particularly relates to a complete redundancy triggering device and method for an extra-ultrahigh voltage direct current transmission converter valve. The complete redundancy triggering device comprises a valve control device and a converter valve, the valve control device comprises a first triggering and monitoring case and a second triggering and monitoring case. The first triggering and monitoring case comprises a first main control board and a first triggering optical link; the second triggering and monitoring case comprises a second main control board and a second triggering optical link; the converter valve comprises a first optical splitter and a plurality of thyristor control units. The first main control board is connected with the first optical splitter through a first trigger optical link, the second main control board is connected with the first optical splitter through a second trigger optical link, and the first optical splitter is connected with the plurality of thyristor control units. According to the invention, when the optical link fault is triggered and detected back, fault processing of all board cards and channels can be carried out without power cut and converter valve locking, complete redundancy configuration of a valve control system is realized, and the operation reliability and stability of a direct current system are greatly improved.

The invention discloses a semiconductive ethylene propylene diene monomer and a preparation method and application thereof. The semiconductive ethylene-propylene-diene monomer is prepared from the following raw materials: ethylene-propylene-diene monomer, zinc oxide, an anti-aging agent, paraffin oil, liquid ethylene-propylene-diene monomer, superconductive carbon black, reinforcing carbon black, a vulcanizing agent and a vulcanizing aid. Wherein the ethylene content of the liquid ethylene-propylene rubber is 60-75wt%, and the molecular weight of the liquid ethylene-propylene rubber is 5000-40000. The semi-conductive ethylene propylene diene monomer adopts a peroxide-vulcanization mixed system, and the semi-conductive ethylene propylene diene monomer prepared by adopting the formula has the advantages of low volume resistivity (less than or equal to 15 omega.cm), high tear strength (greater than or equal to 35 MPa), high tensile strength (greater than or equal to 13 MPa), high bonding strength (greater than or equal to 7 MPa), low rubber content, no color flooding in product appearance and the like; the method can be used for preparing semiconductive materials in the high-voltage and ultrahigh-voltage direct current field.

The invention provides a preparation method and application of an ultra-high-pressure solid-state lithium iron phosphate material, and belongs to the field of lithium batteries. The method comprises the following steps: respectively mixing iron phosphate with a high iron-phosphorus ratio and iron phosphate with a low iron-phosphorus ratio with a lithium source, an additive and a carbon source, carrying out sanding, spray granulation and sintering treatment to obtain a precursor A and a precursor B, and carrying out secondary sintering on the precursor B to obtain a precursor C; and finally, mixing the precursor A and the precursor C in proportion, and crushing to obtain the ultra-high pressure solid type lithium iron phosphate positive electrode material. According to the invention, the coordination of high compaction density and excellent electrochemical performance of the lithium iron phosphate positive electrode material is realized by constructing a grading structure of a large-particle skeleton and small-particle filling and optimizing a crystal structure by combining a two-step sintering process, and the lithium iron phosphate positive electrode material is suitable for the field of high-capacity lithium ion batteries.

The invention discloses a driving power supply fault switching method and system, particularly relates to the technical field of power system relay protection, and is used for solving the problem that an existing relay power supply switching system causes misoperation due to common-mode interference caused by ground fault transient potential gradient. An earth screen potential gradient is collected in real time, a control cable orthogonal electric field component is measured synchronously, an electric field fiber bundle structure is reconstructed based on topology invariant distribution of a cable surface topology sequence substance, and a common-mode interference coupling coefficient is generated according to a space vector relation between an earth screen gradient direction and a reconstructed electric field; the coupling coefficient is converted into electrostrictive strain through the inverse piezoelectric effect, then a dynamic compensation voltage instruction is generated, finally, the compensation instruction is superposed to a power supply control loop to drive a standby power supply to be switched, the coupling influence of earth screen transient interference on a relay is eliminated from the physical mechanism level, the problem of misoperation is fundamentally solved, and the reliability of the relay is improved. And the reliability of power supply switching of the ultrahigh-voltage power transmission and transformation system is

The invention relates to the field of power cable materials, in particular to an ultrahigh-voltage cable insulating material, a preparation method thereof and a cable. The ultrahigh-voltage cable insulating material is prepared from the following raw materials in parts by mass: 80 to 100 parts of polyethylene, 1 to 5 parts of a cross-linking agent, 0.5 to 1 part of a compatilizer and 0.1 to 1 part of an organic molecular semiconductor. According to the ultrahigh-voltage cable insulating material, the organic molecule semiconductor with high electron affinity is introduced into the polyethylene matrix, and free electrons are attracted and fixed through strong static electricity of the organic molecule semiconductor, so that injection, migration and accumulation processes of charges in the cable insulating material are blocked; the problem of space charge accumulation of a cable insulating material in a high-voltage environment is solved from the source, and the insulativity and the long-term operation reliability of the cable insulating material are effectively improved.

The invention provides a portable power detection device for ultrahigh-voltage cable maintenance, and relates to the technical field of cable detection devices. The installation mechanism comprises a detector, the detector is of a rectangular structure, when electric leakage happens to the cable, a detection contact rapidly senses current changes, a telescopic rod is triggered to push a movable plate to move forwards, a contact layer with a printing material on the outer side of the movable plate is attached to the electric leakage position of the cable, and the surface of the cable is coated with the printing material; an electric leakage point is accurately positioned through a striking mark, so that a worker can conveniently and quickly lock a fault point and carry out targeted maintenance work, the fault repair efficiency is greatly improved, the fault duration time of a power system is shortened, and the problems that the detection structure of an existing cable detection device is imperfect and the detection cost is low in the detection process are solved. A structure for specifically identifying an electric leakage position is lacked, only an electric leakage area can be positioned, and a specific electric leakage point cannot be determined, so that a worker is difficult to take a targeted repair measure.

The invention discloses an ultra-high voltage nuclear phase correction method, device and equipment based on multi-source data fusion and a medium, and relates to the technical field of power grids, and the method comprises the steps: firstly obtaining the t-th round of multi-source data and a real phase value of ultra-high voltage equipment; and inputting the multi-source data into the pre-trained neural network model to generate a correction coefficient, correcting a phase value by combining the correction coefficient and the original phase value, and calculating a phase error with a real phase value. If the phase error exceeds the error threshold value and the adjustment frequency does not exceed the adjustment frequency threshold value, adjusting the gain of the acquisition equipment amplifier according to the electric field intensity, and re-acquiring the (t + 1) th round of multi-source data; and outputting a corrected phase value if the phase error reaches the standard. In addition, the correction phase value needs to be rechecked by two persons, and when the deviation exceeds a second threshold value, intelligent contract alarm and frozen combination ring operation are triggered; time deviation and a second phase error can be obtained through the current temperature, and secondary correction is carried out on the original phase value. According to the method, the nuclear phase precision and safety of the ultrahigh-voltage equipment can be improved.

The invention relates to the technical field of cross-medium communication, and discloses a cross-medium communication method, system and device based on a piezoelectric effect and a medium, and the system comprises a piezoelectric mechanical antenna which is used for generating ultrasonic waves through mechanical vibration and further converting the ultrasonic waves into electromagnetic radiation to realize cross-medium communication; the matching network is connected with the piezoelectric mechanical antenna and the ultrahigh-voltage driver and is used for optimizing the energy transmission efficiency between the driving circuit and the piezoelectric mechanical antenna; the power management circuit is used for providing multi-stage power supply voltage required by the system; the ultrahigh-voltage driver is used for converting the signal into a high-voltage driving signal and driving the piezoelectric mechanical antenna to work through the matching network; the controller is used for generating a modulation signal, coordinating the work of each module of the system and simultaneously receiving environment data of the peripheral sensor to dynamically adjust parameters; the peripheral sensor is used for collecting environment parameters and transmitting data to the controller, and self-adaptive adjustment of the system is achieved.

The utility model discloses an ultrahigh-pressure directly-hung phase modifier, which comprises a phase modifier body, an air cooling device and a moisture filtering device, and is characterized in that the phase modifier body is provided with a casing, stator back iron, a stator body and a rotor; a first mounting end and a second mounting end are detachably mounted at the two ends of the shell respectively, and the two ends of the rotor are rotationally mounted at the first mounting end and the second mounting end and extend to the outside respectively to be provided with an air supply fan and a cooling fan; an air inlet of the first mounting end is connected with an air cooling device through a moisture filtering device, and an air outlet cover is mounted at the second mounting end; the stator body comprises a stator core and a winding, the stator core is made of non-magnetic teeth, and the winding is made of cables. According to the utility model, non-magnetic teeth and cable materials are adopted, magnetic saturation of tooth parts is avoided, eddy current loss is reduced, the thickness of an insulating layer of the cable is uniform, the quality is stable, the stability of the phase modifier is enhanced, and the problem of heating of the phase modifier is solved by cooling through the air cooling device.

The invention discloses an ultra / extra-high voltage alternating current line degraded insulator live detection and intelligent evaluation system, which comprises a data acquisition module, which adopts a high-precision electric field sensor array with electromagnetic protection to carry out multi-angle electric field live scanning, sampling and detection on different types of insulator strings; the feature extraction module is used for establishing an electric field distribution multi-dimensional feature library including an electric field gradient matrix, an electric field entropy value, electric field spectral density and electric field polarization features according to the collected data features, and extracting abnormal features through wavelet transform and an outlier detection algorithm; and the intelligent evaluation module is used for constructing an insulator multi-physics field coupling model, establishing a mapping relation between electric field characteristics and degradation types, positions and degrees through bidirectional calibration of measured data and model prediction data, and outputting an evaluation result. The intelligent evaluation system can efficiently and accurately identify the degradation state of the insulator, reduces the operation and maintenance cost of a power grid, and guarantees the safe and stable operation of a power system.

The invention discloses a power transmission line ice resistance improving and transforming method based on four-split conductor transformation and double-split. The method comprises the steps that a line mechanical structure and electrical parameters needed in the power transmission line transforming process are collected; preliminarily selecting a modified double split conductor section according to an economic current density method; s2, verifying the selected wire cross section based on a heating condition, and if the heating verification is not passed, entering the step S2 again, and selecting a larger cross section; the diameter of the selected wire is verified based on the corona condition, and if the corona verification-free condition is not met, the corresponding corona inception field intensity Es is calculated to serve as the constraint condition in the step S5; based on mechanical and electrical safety constraint conditions, optimized design is carried out on the split spacing and the phase spacing of the remodeled wire; and S6, simulation verification of the ice resistance improvement effect after modification is carried out, and a new thought is provided for ultrahigh-voltage power transmission line wires in medium and heavy ice areas and structural form selection thereof through extraction of the lowest surface electric fields of different double-bundle conductor structural forms.