554 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 discloses a booster station monitoring operation and maintenance system, and relates to the technical field of data management. A plurality of heterogeneous intelligent sensors are deployed in a booster station to monitor the operation state of equipment in real time, an electromagnetic field sensor is utilized to sense the electromagnetic interference intensity, and when abnormal high-frequency pulses are detected, a data anomaly detection mode is triggered to detect the abnormal high-frequency pulses; calculating an error compensation value according to the abnormal degree, correcting abnormal data, ensuring the accuracy of the data, performing equipment state evaluation according to the recovered data, and if potential safety hazards are found, sending intelligent early warning to operation and maintenance personnel and providing suggestions for adjusting monitoring strategies or optimizing shielding measures; according to the invention, the anti-interference capability and accuracy of booster station monitoring data are effectively improved, the risk of operation and maintenance misjudgment caused by electromagnetic interference is reduced, the reliability of intelligent monitoring in an ultrahigh-voltage power transmission scene is enhanced, and a powerful guarantee is provided for safe and stable operation of a power system.

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-voltage submarine cable flexible joint insulation recovery method, which comprises the following steps: S1, placement: placing a cable to be processed in a working environment; s2, checking to ensure that the surface of the to-be-processed cable is smooth and clean; s3, mold filling: putting the cable to be processed into an injection mold, installing a cold contraction pipe, and adjusting the position; s4, the cable to be processed in the mold is heated and kept; s5, starting an external plastic extruding machine; s6, the pressure of the mold is kept, discharging is stopped, and the extruder is removed; s7, the injection mold is heated and kept, and cooling is conducted in stages; s8, the injection mold and the cooling pipe are dismantled; according to the recovery method, the steps are simple, only one-time mold installation and extrusion process is needed, the workpiece does not need to be vulcanized after heating is stopped and cooling is completed, and the recovery method can effectively save the preparation process, shorten the process time, improve the production efficiency and be beneficial to guaranteeing the on-time delivery rate of a factory.

The utility model discloses an ultrahigh-voltage security anti-induced current drainage grounding device. The grounding clamp is provided with a connecting part and a hook part, the pressing block is arranged in the grounding clamp, the adjusting pressing screw rod is connected to the bottom end of the pressing block and connected with the grounding clamp in a screwed mode, a locking component is arranged on the side face of the connecting part, and soft contact surfaces are arranged on the inner surface of the hook part and the upper surface of the pressing block. A foldable stress application rod is hinged to the bottom of the adjusting pressing screw rod, and the side portion of the connecting portion is connected with a grounding lead. The grounding clamp has the advantages that after the grounding clamp compresses the conductor, the adjusting compression screw rod is locked through the locking part, so that pressure between the grounding clamp and the conductor is prevented from being released by natural shaking and external force, and the problem of looseness between the grounding clamp and the conductor is solved. Soft contact and surface contact are adopted, the gap between the movable pressing block and the sliding groove is small, and the grounding clamp can move up and down freely, thereby reducing the internal resistance of the grounding clamp. And the stress application rod made of epoxy materials is additionally arranged, so that stress application operation can be performed.

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 provides an ultra-high-voltage split conductor mounting device. The ultra-high-voltage split conductor mounting device comprises a first guide seat, a second guide seat, a rotating seat and a rotating shaft, a plurality of first guide pieces are arranged on the first guide seat, first sliding pieces are arranged on the plurality of first guide pieces, and first threading seats are arranged on the first sliding pieces; a plurality of second guide parts are arranged on the second guide seat in the direction of the axis of the first guide seat, second sliding parts are arranged on the second guide parts, second threading seats are arranged on the second sliding parts, and the second sliding parts can abut against the first sliding parts to slide in the sliding process of the second sliding parts; the rotating seat can rotate relative to the second guide seat and can drive the second sliding piece to slide relative to the second guide piece; the rotating shaft sequentially penetrates through the first guide seat, the second guide seat and the rotating seat and is configured to drive the rotating seat to rotate; the first guide seat can slide in the axial direction of the rotating shaft, and the first guide seat can rotate relative to the rotating shaft so as to adjust the posture of the first guide seat relative to the second guide seat.

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 utility model relates to a neutral point positive and negative regulation system for an ultrahigh-voltage full-range voltage regulation intermediate transformer, which comprises an upper voltage regulation coil, a lower voltage regulation coil and a switch body, the switch body comprises a regulation connecting line, a regulation moving contact and two regulation switches, the regulation connecting line is connected with the tail end of a high-voltage coil group on a corresponding core column of the transformer, and the regulation moving contact is connected with the two regulation switches. Meanwhile, the two ends of the adjusting connecting wire are connected with the adjusting switches on the corresponding sides respectively, the upper voltage adjusting coil and the lower voltage adjusting coil control positive and negative gear switching through the adjusting switches on the corresponding sides respectively, a plurality of upper voltage adjusting static contacts are arranged on the upper voltage adjusting coil, and a plurality of lower voltage adjusting static contacts are arranged on the lower voltage adjusting coil. And one end of the adjusting moving contact is in contact with the corresponding upper voltage regulation static contact, and the other end of the adjusting moving contact is in contact with the corresponding lower voltage regulation static contact. According to the utility model, 33-shift output voltage is provided under each input voltage, and 66-shift different voltage output can be further realized in cooperation with series-parallel connection conversion adjustment of the high-voltage coil group.

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 a method for manufacturing anode foil of ultra-high voltage aluminum electrolytic capacitor with high dielectric constant, and belongs to the technical field of anode foil of aluminum electrolytic capacitor. The method comprises: (1) preparation of ultra-high voltage etching foil, including pretreatment of aluminum plain foil, pore formation, secondary pore expansion and tertiary pore expansion of etching foil, etc.; (2) preparation of Ag / TiO2 precursor solution, preparing titanium dioxide gel doped with different Ag contents by sol-gel method; (3) immersion coating treatment, preparing a uniform gel layer on the etching foil by immersion-pulling method; (4) preparation of ultra-high voltage anode foil, anodizing the etching foil after coating the gel layer at high voltage, and then annealing at high temperature. The ultra-high voltage anode foil prepared according to the present invention has a higher specific capacitance, and can also maintain a smaller loss factor tanδ.

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 discloses an ultrahigh-voltage circuit breaker operating mechanism, which relates to the technical field of circuit breakers and comprises a rigid connecting rod, a permanent magnet holding module, a holding block, a static opening coil, a static closing coil, a repulsive force disc and a dynamic power module, the retaining block and the repulsive force disc are fixedly arranged on the rigid connecting rod in a sleeving manner, the retaining block is arranged in a first moving channel between the permanent magnet retaining module and the static opening coil, the repulsive force disc is arranged in a second moving channel between the static opening coil and the static closing coil, and the dynamic power module is fixedly arranged outside the second moving channel in a sleeving manner; the permanent magnet holding module can provide upward suction force for the holding block; the static opening coil is electrified to provide downward repulsive force for the repulsive force disc; the static closing coil is electrified to provide upward repulsive force for the repulsive force disc; the dynamic power module is electrified to provide downward repulsive force or upward repulsive force for the repulsive force disc; the mechanism is compact in structure, quick and stable in opening and closing actions, excellent in reliability and long in service life, and meets the quick operation requirement of the ultrahigh-voltage circuit breaker.

The invention relates to the technical field of ultrahigh-voltage cable preparation, in particular to a modification method of conductive carbon black, an ultrahigh-voltage cable semi-conductive shielding material and a preparation method of the ultrahigh-voltage cable semi-conductive shielding material, and the modification method comprises the following steps: A, adding polyethyleneimine into a solvent, and performing ultrasonic dispersion and heating to obtain dispersion liquid; b, uniformly mixing conductive carbon black powder with the dispersion liquid in the step A, granulating and drying to obtain modified conductive carbon black; the ultrahigh-voltage cable semi-conductive shielding material has excellent electrical performance and mechanical performance, the processing process has the advantages of being simple in process, reliable in preparation, excellent in performance and the like, large-scale production is facilitated, and the ultrahigh-voltage cable semi-conductive shielding material has very high practical and popularization value in actual cable manufacturing.

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 relates to the field of polyethylene insulation materials, and particularly discloses a polyethylene insulation material for an ultrahigh-voltage cable and a preparation method of the polyethylene insulation material, and the polyethylene insulation material comprises the following raw materials in parts by weight: 60-100 parts of polyethylene resin, 0.4-1.2 parts of an antioxidant, 1.5-5.5 parts of a cross-linking agent, 5-15 parts of a stabilizer and 3.5-15 parts of a composite modifier. Wherein the composite modifier is a mixture of nano magnesium oxide and laurinol. The polyethylene insulating material provided by the invention has excellent electrical properties, excellent mechanical properties and stable performance, and meets the requirements of insulating materials for ultrahigh-voltage cables.

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 provides a SiC power semiconductor ultrahigh-voltage current detection method and system. The method comprises the steps that differential sampling processing is carried out on magnetic field signals collected by an inner ring Hall sensor array and an outer ring Hall sensor array which are arranged in a preset range of a SiC power semiconductor; performing nonlinear characteristic curve modeling processing on the output signal of the inner ring sensor according to the output signal of the outer ring sensor and the ratio of the output signal of the inner ring sensor to the output signal of the outer ring sensor to obtain a sensor saturation characteristic mapping relation under different magnetic field intensities; performing dynamic weight distribution processing on the inner and outer ring sensor signal ratio according to the mapping relation; and finally, performing segmented reconstruction processing on a current detection result to obtain a complete current measurement value. According to the method, the inner and outer ring differential structure and the dynamic weight distribution strategy are utilized, the saturation problem of the magnetic sensor under the ultra-high current is effectively solved, and the accuracy of current detection is ensured.

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.