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70results about How to "Characteristic impact" patented technology

Array substrate and preparation method thereof

The invention provides an array substrate and a preparation method thereof, and belongs to the technical field of display. By means of the array substrate, the problem can be solved that as the feature of an existing thin film transistor is influenced by the light of an organic light emitting diode, reverse display of a black screen is caused. The array substrate comprises a substrate, the substrate is divided into multiple subpixels in different colors, each subpixel comprises a driving region, a capacitance region and a light emitting region, and at least one thin film transistor is arrangedin each driving region; organic light emitting diodes are arranged in each light emitting region, a first color film structure corresponding to the color of the subpixel where each light emitting region is located is arranged below the organic light emitting diodes, a second color film structure is arranged below the thin film transistors, and the second color film structure and the first color film structure in at least one color are arranged in the same layer.
Owner:BOE TECH GRP CO LTD

Low temperature poly-silicon back plate, fabrication method thereof and light-emitting device

The invention discloses a low temperature poly-silicon back plate, a fabrication method thereof and a light-emitting device. The low temperature poly-silicon back plate comprises a substrate, a thin film transistor and a light blocking layer, wherein the thin film transistor and the light blocking layer are arranged above the substrate, and the light blocking layer is arranged above the thin film transistor and used for blocking incoming light from irradiating to the thin film transistor. In the technical scheme provided by the invention, the low temperature poly-silicon back plate comprises the thin film transistor and the light blocking layer, the light blocking layer is arranged above the thin film transistor and can be used for blocking the incoming light from irradiating to the thin film transistor, the influence of the incoming light to the characteristic of the thin film transistor is avoided, and thus, the stability of the thin film transistor is improved.
Owner:BOE TECH GRP CO LTD

Method of manufacturing nickel powder, apparatus for manufacturing nickel powder, and crucible for manufacturing nickel powder

Provided is a method and apparatus for producing nickel powder with which in the case of melting and vaporizing nickel raw material charged into a crucible with plasma to obtain the nickel powder, the deterioration in the characteristic of electronic parts can be prevented. The nickel in the crucible 2 set in a plasma reaction furnace 1, is melted and vaporized and cooled to obtain the nickel powder with a grain collecting device 12. At least a portion in contact with the nickel on the surface layer in the crucible 2 or the whole body, is covered with a coating layer. In the coating layer, a material composed of a component used for the electronic parts using the nickel powder for electrode or the material composed mainly of this component, is used. Further, the whole crucible is manufactured with the material composed of the component used for electronic parts using the nickel powder for electrode of the material composed mainly of the component. The inner wall or the whole body in the reaction furnace 1 uses the above material, too.
Owner:TDK CORPARATION

Measurement specimen and measurement method for interface characteristic of embedded rib reinforced concrete beam

The invention discloses a measurement specimen and a measurement method for an interface characteristic of an embedded rib reinforced concrete beam. The specimen comprises a combined reinforced rib, wherein a through groove is formed in the center of the section of the combined reinforced rib in the axial direction; strain gauges are uniformly distributed on the inner wall of the through groove along the axial direction of the through groove. The method comprises the following steps that the combined reinforced rib is embedded into the concrete beam, and according to the conventional four-point bending static load test, an automatic static strain acquisition instrument records data epsilon f of the strain gauges and the cracking load Pcr, the yield load Py and the ultimate load Pu of the beam in real time; according to the strain data measured actually, the shearing strength of an interface of the combined reinforced rib or a CFRP rib with a glue agent is obtained by calculation; the Pu theory value is obtained by calculating according to the calculating method of the concrete reinforcing strength in the concrete reinforcing theory. By comparing the errors of the Pu theory value with the Pu, the result shows that the specimen can be used for improving the measurement precision of parameters of the interface characteristic of the reinforced concrete beam, and the strain measurement is convenient and easy.
Owner:HUNAN INSTITUTE OF ENGINEERING

Vibration energy recovery device of automobile shock absorber

The invention discloses a vibration energy recovery device of an automobile shock absorber. The vibration energy recovery device comprises an energy recovery part and an energy conversion part, wherein the energy recovery part comprises a stator and a mover; the stator comprises a stator fixing plate and a cylindrical stator core; the stator fixing plate is fixedly connected with the outer side of an oil storage cylinder barrel; the cylindrical stator core is fixed on the stator fixing plate; the cylindrical stator core is surrounded by a plurality of groups of silicon steel laminated sheets fixed on the stator fixing plate; a coil winding is embedded into each stator inner ring groove; the mover comprises a hollow cylinder which is fixedly connected with a piston rod; a plurality of annular permanent magnets and a plurality of mover magnetic poles, which are in staggered arrangement, are fixed on the excircle surface of the hollow cylinder; the homopolar surfaces of any two adjacent annular permanent magnets are opposite; the energy conversion part comprises a rectifier and a storage battery; an input end of the rectifier is connected with a coil adapter; and an output end of the rectifier is connected with the storage battery. According to the vibration energy recovery device of the automobile shock absorber, the energy carried by a suspension system can be recovered in real time in an automobile driving process, so that the targets of energy conservation and emission reduction of the automobiles are achieved.
Owner:TIANJIN UNIV

Automobile suspension system vibration energy recovering apparatus

The invention discloses an automobile suspension system vibration energy recovering apparatus comprising an energy recovering part and an energy converting part. The energy recovering part is formed by a stator and a mover inserted into the stator, wherein the stator is formed by a cylindrical stator iron core fixedly connected with the external side of an oil storage cylinder; a plurality of circular grooves are arranged on an internal cylindrical surface of the cylindrical stator iron core; a coil winding set is embedded into each circular groove; the mover consists of a cylindrical mover magnet yoke fixedly connected with a piston rod; a plurality of circular permanent magnets are fixed on the external cylindrical surface of the cylindrical mover magnet yoke; and magnetic flow directions of any two adjacent circular permanent magnets are opposite. The energy converting part is formed by a rectifier and a storage battery, wherein an input end of the rectifier is connected with a coil joint; and an output end of the rectifier is connected with the storage battery. Energy carried by the suspension system can be recovered in real time during the driving of the automobile, so automobile energy conservancy and emission reduction can be achieved.
Owner:TIANJIN UNIV

Method and apparatus for actively controlling pulsation of boat propeller thrust

The invention relates to a method and a device for actively controlling thrust pulse of a boat propeller. The method and the device are characterized in that an axial thrust or axial vibration measuring system arranged on a boat propeller shaft system is used to measure the pulse of axial thrust of the boat propeller or the size of axial vibration of the propeller shaft system; according to the pulse of axial thrust of the boat propeller or the size of axial vibration of the propeller shaft system, a thrust pulse controller works out the size of controlling force which needs to be exerted on the boat propeller shaft system and is used for removing thrust pulse; a signal of the thrust pulse controller is amplified through a power amplifier; and the needed axial controlling force is generated on the boat propeller shaft system through a noncontact type electromagnetic force actuator arranged on the boat propeller shaft system so as to control and compensate the thrust pulse of the boat propeller, thereby achieving the aim of reducing the influence of the thrust pulse of the boat propeller on boat vibration.
Owner:ZHEJIANG UNIV

Electronic component package

In an electronic component package, an electronic component element is mounted on a metal base, the electronic component element is covered by covering the metal base with a metal cap, and the electronic component element is hermetically sealed by bonding the metal base with the metal cap by resistance welding. In the electronic component package, a protruding section is arranged at a part to which the metal cap of the metal base abuts, and the protruding leading end of the protruding section is composed of a flat surface. In addition, the protruding section has a cross-section having a shape formed by combining an arc part on an upper side of an isosceles trapezoid.
Owner:DAISHINKU CORP

Preparation method of integrally-formed inductor, and integrally-formed inductor

The invention discloses a preparation method of an integrally-formed inductor, and the integrally-formed inductor. The preparation method comprises the following steps: A, spraying the partial or allareas of a coil and a conducting wire frame with a coating agent solvent; B, curing the sprayed coil and the conducting wire frame; C, putting the coil and the conducting wire frame into magnetic powder, and packaging to form an integrally formed inductor semi-finished product; and D, carrying out baking and pin bending treatment on the packaged semi-finished product to form the integrally-formedinductor. According to the invention, part or all of the areas of the coil and the conducting wire frame are sprayed, and then the coil and the conducting wire frame are put into the magnetic powder to be packaged to form the integrally formed inductor, so that an enameled film on the outer layer of the coil can be prevented from being punctured by the magnetic powder during packaging (such as diecasting), and the short circuit of the inductor is avoided.
Owner:HENGDIAN GRP DMEGC MAGNETICS CO LTD

Ultrasound-assisted method and device for extracting nano-particles from nano-powder organic solvent suspension liquid

The invention discloses an ultrasound-assisted method and an ultrasound-assisted device used for extracting nano-particles from nano-powder organic solvent suspension liquid. Based on the special effects of ultrasound in the process for extracting nano-particles from the nano-powder organic solvent suspension liquid, nano-particle extraction and separation effects can be improved. The special effects of ultrasound include a thermochemical effect, a cavitation effect, a mechanical stirring effect and an ultrasonic standing wave effect.
Owner:JIANGSU CALF CARBON TECH CO LTD

Polar-coordinate conversion-based magnetic-field determination method of cylindrical linear oscillation motor

The invention discloses a polar-coordinate conversion-based magnetic-field determination method of a cylindrical linear oscillation motor. Firstly, structure parameters of the cylindrical linear motorare determined, and an oscillation model of the cylindrical linear motor under a cylindrical coordinate system is established; then equivalence processing is carried out on the oscillation motor model, and a coordinate transformation method is employed to convert a solving coordinate system from the traditional cylindrical coordinate system to a polar coordinate system for analysis; then a methodof separation of variables and a subdomain method are combined to carry out region dividing on the model under the polar coordinate system, and Laplace equations or Poisson equations of all regions are listed; and finally, boundary conditions and interface conditions of a magnetic field are utilized to solve general-solution equations of all the above-mentioned regions, and thus electromagnetic performance of the linear oscillation motor is obtained.
Owner:SOUTHEAST UNIV

Method for realizing electrostatic prevention at radio-frequency port

InactiveCN101801152ARealize anti-staticRealize anti-static functionTransmissionElectrostatic chargesEngineeringHigh effectiveness
The invention discloses a method for realizing electrostatic prevention at a radio-frequency port. A wire is connected between a microstrip line of the radio-frequency port and the ground, the width of the wire is 0.2-1 mm, and the length is in a way of a quarter-wave line connected in parallel to the microstrip line. The invention effectively inhibits the static signal input to the radio-frequency port, thereby realizing the function of electrostatic prevention at a radio-frequency module port. The invention has the advantages of simple circuit, small size, low cost, simple method, easy realization and high effectiveness.
Owner:NTS TECH CHENGDU

Packaging method of chip of phase change memory

The invention discloses a packaging method of a chip of a phase change memory. The method comprises: a chip that needs to be packaged is fixed in a packaging shell; an ultrasonic bonding technology is utilized to enable electrodes of the chip and pins of the shell to be connected one by one; and then, a shielding cover is used to enable the chip to be isolated from the outside world. According to the invention, because ultrasonic bonding does not need a critical bonding temperature, packaging on a chip can be carried out at a normal temperature, so that there is no influence on a characteristic of the chip itself of the phase change memory. When bonding is carried out, no current is added and no fusing is carried out; there is no effect on physical and mechanical performances of materials; no compound is formed to influence the performance of the chip; the cleanness of the chip can be maintained; and packaging can be directly carried out without tedious cleaning processing, so that testing demands of good stability, high precision and good repeatability can be met.
Owner:HUAZHONG UNIV OF SCI & TECH

Thin film transistor and manufacturing method thereof, array substrate and display device

Embodiments of the invention provide a thin film transistor, a manufacturing method thereof, an array substrate, and a display device, and relates to the field of electronic devices. The thin film transistor is capable of reducing probability that metal atoms in a second metal layer in a source electrode and / or a drain electrode diffuse to a channel region. The thin film transistor comprises: an active layer disposed on the substrate; and a source electrode and a drain electrode in contact with the active layer; wherein the source electrode and the drain electrode comprise a first metal layerand a second metal layer arranged in a stacked manner, and the first metal layer is adjacent to the active layer relative to the second metal layer. Area of an overlapping area of orthographic projection of the second metal layer in the source electrode and the active layer on the substrate is smaller than area of an overlapping area of orthographic projection of the first metal layer and the active layer in the source electrode on the substrate; and / or area of an overlapping area of orthographic projection of the second metal layer and the active layer in the drain electrode on the substrateis smaller than area of an overlapping area of orthographic projection of the first metal layer in the drain electrode and the active layer on the substrate.
Owner:HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1

Full-automatic proportioning device and method of lubricating agent for thread throwing of ceramic fibers

PendingCN106823906AHigh precisionAvoid the lack of precision caused by manual proportioningTransportation and packagingRotary stirring mixersFiberWater pipe
The invention discloses an full-automatic proportioning device and method of a lubricating agent for thread throwing of ceramic fibers, belongs to the field of proportioning devices of lubricating agents for thread throwing of ceramic fibers, aims to solve the technical problem that the conventional lubricating agent for thread throwing of the ceramic fibers has the defects of low proportioning accuracy and impossibility in continuous production. The full-automatic proportioning device comprises a bracket, liquid level detection devices, a stirring device, a controller, a water tube, a liquid outlet tube, a lubricating agent container, a lubricating agent metering cup and an upper container, wherein the lubricating agent container, the lubricating agent metering cup and the upper container are arranged on the bracket; the lubricating agent metering cup and the upper container are provided with upper ports and lower ports which are arranged one above the other; the upper port of the upper container communicates with the water tube which is positioned above the upper port of the upper container; the lower port of the upper container communicates with the liquid outlet tube; the liquid outlet tube, the water tube and liquid delivery tubes are provided with switch valves; the lubricating agent metering cup and the upper container correspond to the liquid level detection devices respectively; the liquid level detection devices and the stirring device are connected with the controller. The method is used for preparing lubricating liquid by using the full-automatic proportioning device of the lubricating agent for thread throwing of the ceramic fibers.
Owner:山东红阳高温节能材料股份有限公司

Rapid detection method for heavy metal contents in children textiles and shoe parts based on XRF technology

The invention provides a rapid detection method for heavy metal contents in textiles and shoe parts. The method adopts an XRF scanning method, only a proper oil-soluble organic solvent and a water-soluble organic solvent are needed to sequentially clean a child textile or shoe part, and heavy metal content detection can be carried out after drying, so that sample pretreatment steps are greatly simplified, the detection efficiency is greatly improved, and the detection time and the detection cost are saved.
Owner:GUANGDONG TESTING INST OF PROD QUALITY SUPERVISION

Electric motor stator

When winding a wire around the magnetic teeth of a stator core, it is possible to use the conventional technique which spreads the stator core for winding the wire. However, in the case pf two-pole stator, the winding space has a large curvature and it is difficult to perform a sufficient winding. The present invention enables a user to perform a sufficient amount of winding with a high density even in a winding space of a large curvature. Hinge portions (13e) are arranged on the magnetic pole teeth (11) so as to spread pole arcs (11a) toward outer circumference, so that winding is performed in the state that the winding spaces (S) at the both sides of the magnetic pole teeth (11) are positioned in series on a single straight line.
Owner:MAKITA CORP

Controllable vibration damper for motor vehicles

The invention relates to a controllable vibration damper (1), in particular for a vehicle body, comprising a cylindrical tube (10) which has a hydraulic fluid that is sealed in the cylindrical tube, a piston (2) which is axially movable within the cylindrical tube (10) along a cylindrical tube axis (A) and which divides the cylindrical tube (10) into two work chambers (11, 21), and a piston rod (3) which is oriented parallel to the cylindrical tube axis (A) and which is connected to the piston (2) at one end, multiple fluid passages (12, 22) from one work chamber (11, 21) to the other work chamber (21, 11) being provided in the piston. A first valve assembly (13) for damping the piston movement in a first actuation direction (R1) is arranged in a first fluid passage (12), and a second valve assembly (23) for damping the piston movement in a second actuation direction (R2) is arranged in a second fluid passage (22), each valve assembly (13, 23) having at least one valve disk (14, 24) which sits on a valve seat (15, 25) in a closed valve position and is at least partly removed from the valve seat (15, 25) in an open valve position. Each valve assembly (13, 23) comprises a pilot control chamber (16, 26), and a pressure in the pilot control chamber (16, 26) urges the valve disk (14, 24) into the closed valve position, the pressure in each of the pilot control chambers (16, 26) being adjustable. According to the invention, one of the pilot control chambers (16, 26) is delimited by a base (4), a cylindrical lateral wall (5) which is stationary relative to the base (4) and which is coaxial to the cylindrical tube axis (A), and a dimensionally stable cover (6) which can be moved parallel to the cylindrical tube axis (A) in a radial manner within the cylindrical lateral wall (5).
Owner:THYSSENKRUPP BILSTEIN

Optical device

Provided is an optical device wherein a gap is formed between an optical waveguide path and a substrate without disposing a depression, etc., upon the substrate, and whereon stress is not applied to an optical element even if heat is received from a heater for temperature adjustment. An optical device comprises: a substrate; an optical element further comprising an optical waveguide path which is formed on a surface which faces the substrate; a bonding part which is formed on the substrate to be located sandwiching the optical waveguide path; a heater which is formed on at least either the optical element or the substrate to heat the optical waveguide path; and a micro-bump structure which is configured from a metallic material. The bonding part and the optical element are bonded across the micro-bump structure such that a gap is formed between the optical waveguide path and the substrate.
Owner:CITIZEN WATCH CO LTD

Microstructure for detecting mechanical properties of one-dimensional nanometer materials

The invention discloses a microstructure for detecting mechanical properties of a one-dimensional nanometer material. The microstructure comprises a frame-shaped bracket, wherein two symmetrically arranged upper platforms are connected on the frame-shaped bracket by at least four symmetrical upper vertical beams; the measured nanometer material is fixed between the two upper platforms; two ends of each of the two upper platforms are respectively supported on a supporting seat of the frame-shaped bracket by a lower supporting beam; a lower platform is connected below the two upper platforms by at least four symmetrical oblique beams; and the lower platform is used for applying an external load. The preparation material of the microstructure is polycrystalline silicon, the preparation process of the microstructure is compatible with the existing silicon micromachining process, and the microstructure can be prepared in batches. The load on the one-dimensional nanometer material and the deformation situation of the nanometer material under an effect of the load can be obtained at the same time, and the properties of the nanometer material are not influenced in a detection process.
Owner:XIDIAN UNIV

Flat steel semi-finished product, method for producing a component, and use thereof

The invention relates to a flat steel semi-finished product (1), comprising a first layer (1.1) made of a martensitic steel alloy, which has a tensile strength of > 1200 MPa and / or a hardness of > 370HV10, and at least one second layer (1.2, 1.2') made of a soft steel alloy, which is connected to the first layer (1.1) over the full surface area and in a material-to-material manner, having a tensile strength of < 600 MPa and / or a hardness of < 190 HV10. The invention further relates to a method for producing a component from the flat steel semi-finished product, and to a corresponding use.
Owner:THYSSENKRUPP STEEL EURO AG +1

Method for removing sulfur from petroleum cokes by manganese powder

The invention relates to a method for removing sulfur from petroleum cokes by manganese powder, and belongs to the technical field of metallurgy, carbon materials and metallurgy energy conservation and emission reduction. The method includes the following steps: firstly, crushing the petroleum cokes containing 2.0 wt%-6.4 wt% of sulfur to a particle size of 0.080-0.25 millimetre, adding the manganese powder with the particle size below 200 mesh into the crushed petroleum cokes to be mixed evenly, heating the mixture to 500-900 DEG C, feeding ethanol vapor or mixed gas formed by ethanol vapor and air for reaction for 40-120 minutes, and obtaining desulphurized petroleum cokes and manganese powder particles containing sulfur by screening after the reaction. The reaction is carried out underanoxic conditions, and does not cause burning loss to the petroleum cokes.
Owner:KUNMING UNIV OF SCI & TECH

Flexible direct-current short-circuit fault protection method based on thyristor chain and superconducting current limiters

ActiveCN113036724ADifficult to breakAvoid capacity constraintsElectric power transfer ac networkSingle network parallel feeding arrangementsInductorLimiter
The invention discloses a flexible direct-current short-circuit fault protection method based on a thyristor chain and superconducting current limiters. A converter used in a flexible direct-current power transmission system is a modularized multi-level converter cascaded based on half-bridge sub-modules and is of an A-B-C three-phase structure, and each phase comprises an upper bridge arm and a lower bridge arm; each bridge arm consists of a plurality of half-bridge sub-modules and a bridge arm inductor; an alternating current side output port of the modular multilevel converter is connected in parallel with the thyristor chain; the three-phase lines of the AC side of the modular multilevel converter are each connected in series with a superconducting current limiter; the upper ends of the three-phase upper bridge arms of the modular multilevel converter are connected to a direct current side through a first mechanical switch after being short-circuited, and the lower ends of the three-phase lower bridge arms are connected to the direct current side through a second mechanical switch after being short-circuited. According to the protection method, alternating-current and direct-current side current isolation under a fault condition is achieved by turning on the thyristor chain, the direct-current side fault current is reduced to zero, the alternating-current side fault current is limited through the superconducting current limiters, and therefore direct-current short-circuit fault protection of the flexible direct-current power transmission system is achieved.
Owner:SOUTHEAST UNIV

Food conveyance pipeline sterilizing device and method

InactiveCN106913891AGrowth inhibitionDestroy biological structuresChemicalsHigh concentrationMicrobubbles
The invention discloses a food conveyance pipeline sterilizing device and method and belongs to the field of pipeline sterilization. The device mainly comprises an ozone generating device, a metal pipe, a microbubble generating device, a diffusion pipe, a dissolving device, a food conveyance pipeline and an ozone water return pipeline. The ozone generating device is connected to the microbubble generating device through the metal pipe, then to the dissolving device through the diffusion pipe and further to the food conveyance pipeline, and finally ozone water flows back to the dissolving device through the ozone water return pipeline. The realization way is that ozone is generated by the ozone generating device and conveyed into the microbubble generating device, generated microbubbles containing ozone are conveyed into the dissolving device so that high-concentration ozone water can be generated within a short period of time, and high-concentration ozone water is conveyed to the food conveyance pipeline for sterilization and then flows back to the dissolving device. The food conveyance pipeline sterilizing device and method have the advantages that the utilization rate of ozone is high, the investment is low, the operation cost is low, the sterilization efficiency is high, and the application range is wide.
Owner:浙江中兵环保股份有限公司

Preparation method of Chinese herbal ointment

InactiveCN103919881AImprove bindingGive full play to the maximum effect of drugsAerosol deliveryOintment deliveryHigh concentrationAdditive ingredient
The invention relates to a preparation method of Chinese herbal ointment. The method comprises the following steps: distilling to extract and purify distilled calendula flower water with high concentration, mixing tamanu oil and sweet almond oil in a mass ratio of 1:5 after melting an emulsifier and adding into the emulsifier, then adding the distilled calendula flower water, mixing and sufficiently stirring for 3-5 minutes at a constant temperature of 60 DEG C-70 DEG C, and then cooling to obtain the Chinese herbal ointment. The Chinese herbal ointment disclosed by the invention can fuse water and greases very well to sufficiently bring a most powerful effect of the medicines into play, and is convenient to carry and coat; moreover, effects of the component medicines are combined very well, so that various effects are not affected.
Owner:李辉

Array substrate and preparation method thereof

The invention provides an array substrate and a preparation method thereof. The array substrate comprises a substrate, switching thin film transistors arranged on the substrate in an array manner, anda photosensitive thin film transistor arranged on the substrate, wherein the switching thin film transistors and the photosensitive thin film transistor are arranged on the same layer at an interval;the switching thin film transistor comprises a first semiconductor layer and a shading layer which are positioned on the substrate; and the photosensitive thin film transistor includes a second semiconductor layer on the substrate. According to the invention, the shading layer, the first semiconductor layer and the second semiconductor layer are prepared by adopting the same photomask manufacturing process, so that the manufacturing process of the array substrate is reduced, the production cost of the prior art is reduced, and the productivity effect is improved; and meanwhile, the shading layer above the first semiconductor layer is reserved, so that the influence of illumination on the characteristics of the switching thin film transistor is avoided while the characteristics of the switching thin film transistor are ensured.
Owner:SHENZHEN CHINA STAR OPTOELECTRONICS TECH CO LTD

Flexible DC short-circuit fault protection method based on thyristor chain and superconducting current limiter

The invention discloses a flexible DC short-circuit fault protection method based on a thyristor chain and a superconducting current limiter. The converter used in the flexible DC power transmission system is a modular multi-level converter based on cascaded half-bridge sub-modules: ABC three-phase structure, each phase includes an upper bridge arm and a lower bridge arm, each bridge arm is composed of several half-bridge sub-modules and a bridge arm inductor; the output port of the modular multi-level converter AC side is connected in parallel with a thyristor A superconducting current limiter is connected in series with each of the three-phase lines on the AC side of the modular multilevel converter; the upper ends of the three-phase upper arms of the modular multilevel converter are short-circuited and connected to the DC side through the first mechanical switch , the lower end of the three-phase lower bridge arm is short-circuited and then connected to the DC side through the second mechanical switch. The protection method realizes the current isolation of the AC and DC sides under fault conditions by opening the thyristor chain and reduces the fault current of the DC side to zero, and limits the fault current of the AC side through the superconducting current limiter, thereby realizing the DC short-circuit fault protection of the flexible DC transmission system.
Owner:SOUTHEAST UNIV
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