50results about How to "Improve lightning resistance" patented technology

A solid state power controller (SSPC) often contains electronic circuitry which could be damaged or upset by the excessive transient voltages induced by the lightning and SSPC could result in undesirable (or nuisance) trips due to lightning strikes. The present invention is intended to address the “nuisance trip” issue, by relying on the lightning indicative signals to distinguish between the transient current surge due to the lightning strike and that due to the circuit fault in the power distribution channel. The present invention utilizes either the break-down current in a transient voltage suppression (TVS) device, or a voltage signal at the output of the SSPC as the indication of lightning strike, to avoid nuisance trips.

The invention discloses a lightning protection power cable, which comprises a power transmission cable core and a coating layer for coating the cable core, wherein the coating layer comprises a shielding layer which shields the cable core, an outer tape layer which coats the shielding layer, an outer sheath which coats the outer tape layer, and a grounding layer which is arranged between the cable core and the shielding layer. In the lightning protection power cable, the grounding layer is arranged to improve the lightning protection capacity of the power cable, namely, the grounding layer conducts thunder and light entering the cable into the ground at the moment when a lightning fire occurs so as to ensure the security of the power cable and base station equipment connected with the power cable.

The invention discloses a high-conductivity composite carbon fiber and a preparation method thereof, and belongs to composite carbon fibers and a preparation method thereof. The high-conductivity composite carbon fiber provided by the invention consists of carbon fibers as well as metal coatings and graphene coatings, which are sequentially adhered on the surfaces of the carbon fibers from bottom to top; the carbon fibers are carbon fiber yarns, carbon fiber bundles, carbon fiber cloth, carbon fiber paper or carbon fiber fabrics; the metal coatings are a metal copper coating, a metal nickel coating or a metal iridium coating; and the thicknesses of the metal coatings are 50-500nm. The composite carbon fiber prepared by the invention has excellent conductivity and heat conductivity, can conduct or dissipate lightning stroke energy rapidly, and improves the thunder stroke resistant capability of the carbon fiber material.

The invention discloses a self-supporting lightning-proof power cable. The power cable comprises a power transmission cable core, a covering layer for covering the cable core and a suspension wire connected with the covering layer, wherein the covering layer comprises a shielding layer for shielding the cable core, an external tape layer for covering the shielding layer, an external sheath for covering the external tape layer and a grounding layer arranged between the cable core and the shielding layer. The lightning-proof capacity of the power cable is increased by arranging the grounding layer, namely the grounding layer instantaneously conducts the lightning entering the cable into ground to ensure the safety of the power cable and base station equipment connected with the power cable when the lightning strike occurs.

By means of a simple structure, lightning resistance is improved without increasing the level of fluid noise due to a lightning discharge member provided on a surface of a wind turbine blade. A wind turbine rotor blade lightning discharger, in which a diverter strip serving as a lightning discharge member protrudes from a surface of a wind turbine blade that extends in a radial direction from a rotor head supported in a freely rotatable manner, includes a noise suppressing structure that suppresses the generation of a Karman vortex, which causes noise, on the downstream side of the diverter strip with respect to an airflow that flows at the surface of the wind turbine blade during rotation of the wind turbine rotor blade.

The present invention relates to the technical field of electrolytes, in particular to a high-sparking and anti-lightning electrolyte for an aluminum electrolytic capacitor and a preparation method therefor. The electrolyte comprises the following raw materials in parts by weight: 1.5-2.5 parts of ammonium dodecanedioate, 0.8-1.2 parts of ammonium sebacate, 5-9 parts of sorbitol, 4-6 parts of boracic acid, 4-6 parts of diethylene glycol monobutyl ether, 1-2 parts of polyvinyl alcohol, 0.4-0.6 part of p-nitrobenzyl alcohol, 0.1-0.3 part of ammonium hypophosphite, 6-10 parts of ethylene glycol nano silica sol and 60-80 parts of glycol. The electrolyte is prepared by means of interaction among the raw materials and by strictly controlling a weight proportion of the raw materials; the sparking voltage of the prepared electrolyte can reach 590 V and the conductivity rate of the prepared electrolyte can reach 0.5 ms/cm; and the electrolyte has good electrochemical properties, has the advantages of high sparking voltage, lightning resistance and the like, and can be applied to manufacturing of the aluminum electrolytic capacitors.

The invention relates to a lightning stroke-resistant optical fibre composite overhead ground wire, which comprises aluminium-covered steel wires and an optical unit by taking a stainless steel tube as a sleeve, wherein the optical unit comprises an optical fibre; the optical fibre is in the stainless steel tube; the aluminium-covered steel wires and the optical unit form a layered stranded structure; the aluminium-covered steel wires comprise first aluminium-covered steel wires, second aluminium-covered steel wires and third aluminium-covered steel wires; the layered stranded structure comprises a central layer, a first layer and a second layer; the first aluminium-covered steel wires are in the central line; the first layer is composed of the second aluminium-covered steel wires and the optical unit; and the second layer has eleven third aluminium-covered steel wires. The lightning stroke-resistant optical fibre composite overhead ground wire disclosed by the invention is mainly used for constructing an optical fibre communication network of a power system and has the functions, such as lightning protection, flow division, optical fibre communication and the like, at the same time; furthermore, the lightning stroke-resistant optical fibre composite overhead ground wire has good lightning stroke-resistant performance and can be applied to areas with high thunderstorm.

The invention discloses a single chip microcomputer-based lightening protection online detection integrated box, which comprises a box body, a box cover, a first PCB and a second PCB, wherein the first PCB is provided with a power input terminal, a 10-mode power supply protection circuit, an RC anti-harmonic interference circuit and a single chip microcomputer power supply circuit; the second PCB is provided with a single chip microcomputer, an OLCD screen display circuit connected to the single chip microcomputer, a power supply indicating circuit, a data collecting and processing circuit, an RS485 data transceiver circuit, an external lightening protection module degradation detection circuit, a query button and a sound-light alarm circuit; and the power supply input terminal is used for being connected to a three-phase power supply of a low-voltage power system. By the single chip microcomputer-based lightening protection online detection integrated box, the lightning resistance and the anti-jamming capability of computer room equipment of the low-voltage power system are improved; the safe operation reliability of the equipment is improved; the damage rate of the computer room equipment of the low-voltage power system is reduced; the operation and maintenance cost of a building user is reduced; and good social benefits and economic benefits are generated.

The invention discloses a connector, which comprises an outer shell, an inner shell, a cable and an electronic module, wherein the front end of the outer shell is suitable for being buckled to a connecting seat; the inner shell is accommodated in the outer shell; the cable extends into the inner shell; and the electronic module is electrically connected with conductor cores of the cable. The cable includes an outer shielding layer which wraps the conductor cores and is electrically isolated from the conductor cores, and the outer shielding layer is suitable for being electrically connected to the connecting seat. The cable further includes an inner shielding layer which is located between the conductor cores and the outer shielding layer and is electrically isolated from the conductor cores and the outer shielding layer, and the inner shielding layer is suitable for being electrically connected to a metal housing of the electronic module. In the invention, the inner shielding layer of the cable can be grounded through the metal housing of the electronic module, and the outer shielding layer of the cable can be grounded through the connecting seat, thereby effectively improving the lightning resistance of the whole connector, and improving the outdoor use safety performance of the connector.

The invention discloses a high-altitude collector ring which comprises an inner ring, an outer ring, a power ring and a lightning discharge ring. The inner ring is axially and radially positioned through a deep groove ball bearing and via the outer ring, the inner ring is in sliding connection with the outer ring through a thrust cylindrical roller bearing, and an optical fiber rotating joint is arranged at the top of the inner ring. The middle part of the optical fiber rotary joint is connected with a middle end cover through a bolt, the bottom of the optical fiber rotary joint is rotationally connected with a middle baffle plate in a pulling and inserting manner, and a power ring electric brush welding wire penetrates through the middle end cover and is connected to a device base and thephotoelectric connector. According to the invention, the size of a product is reduced, the weight of the product is reduced, the maintainability of the product is realized, the lightning stroke resistance of the product is improved, the normal operation of the product after lightning stroke is ensured, the service life of the product is prolonged, and the working intensity of the product in a severe environment is increased.

The invention relates to the technical field of LED power supply driving, a wire-to-wire lightning protection circuit with low clamping voltage is disclosed. The circuit is provided with a first varistor, a second varistor, a common-mode inductor and a discharge tube, the first varistor being connected in series with the discharge tube between a fire line and a neutral line or between a fire lineand a fire line, and between a first homonymous terminal and a second homonymous terminal of the common-mode inductor, and the second varistor being connected between a first anonymous terminal and asecond anonymous terminal of the common-mode inductor, and the second varistor being connected between the first anonymous terminal and the second anonymous terminal of the common-mode inductor. The invention has the advantages that: When transient inrush currents occur, at this time, that clamp voltage after the conduction of both ends of the serie combined first varistor + discharge tube is substantially lower than the clamp voltage after the conduction of the second varistor. The clamping voltage of the present application is lower than a design in which a varistor is provided at the frontend of the common-mode inductor, which can suppress transient surge more effectively, improve lightning protection capability of the power supply, and achieve the purpose of more effectively protecting the power supply and the lamp board.

Comparing with prior art, the invention separates analog part of El /Tl interface from its digital part. Thus, digital part and active circuit are integrated on front plug-in board, and analog part and passive circuit are integrated on back plug-in board. Moreover, the invention supports backup for El /Tl interface. Once main front plug-in board of interface is in failure, standby front plug-in board is put into operation automatically so as to enhance reliability of interface and raise stability of system. Usually, back plug-in board is not easy to be damaged so that bound cables will not be influenced. The invention possesses advantages of raised performance for anti lightning strike, preventing event of system down.

The invention relates to the technical field of signal transmission, in particular to a communication signal transmission method and device, electronic equipment and a computer readable storage medium. The method comprises the following steps: acquiring a communication signal in a communication system; performing gain processing on the communication signal; removing an interference signal in the communication signal subjected to the gain processing; and transmitting the communication signal of which the interference signal is removed to a management system. According to the technical scheme provided by the invention, signal transmission is more stable and reliable, the stability of power line carrier communication is improved, and the signal transmission quality is further improved.

The invention discloses a composite insulator, which comprises a core rod, a supporting seat assembly, a first lightning arrester and a second lightning arrester, wherein the first lightning arresterand the second lightning arrester are symmetrically arranged on two sides of the core rod, the lower ends of the core rod, the first lightning arrester and the second lightning arrester are fixedly connected with the supporting seat assembly; the upper end of the core rod is connected with a transverse connecting rod, the two ends of the transverse connecting rod are fixedly connected with the upper end of the first lightning arrester and the upper end of the second lightning arrester respectively, the middle of the core rod is sleeved with a supporting ring, the supporting ring is fixedly connected with the supporting seat assembly through a plurality of anchoring ropes evenly arranged around the periphery of the supporting ring, and the outer wall of the core rod is coated with an antifouling coating. The structure is excellent in windage yaw resistance, lightning stroke resistance and antifouling property.

The invention provides an anti-lightning stroke composite coating which comprises a component A and a component B. The component A contains hydroxyl-terminated polyether and isocyanate resin, and the component B contains amino-terminated resin and an amino-terminated chain extender. The component A and the component B are stored respectively and mixed in the spraying process. According to the coating, the lightning stroke resistance of the aluminum skin can be improved, the temperature rise of an aluminum reticulated shell after lightning stroke can be reduced, and the explosion risk of the flammable and combustible substance storage tank after lightning stroke can be prevented. Meanwhile, the overall weight of the anti-lightning aluminum reticulated shell can be effectively controlled, and the manufacturing cost of the anti-lightning aluminum reticulated shell is further reduced.