31results about How to "Lightning protection is good" patented technology

The present invention relates to a component, in particular in the field of aviation and spaceflight, having a resin matrix in which carbon nanotubes are embedded for high conductivity of the component.

A structural joint for the transmission and control of high current flows in a carbon fiber or carbon fiber hybrid composite structure, said joint includingat least two composite structures comprising a multiplicity of resin bonded carbon fiber plies,an adhesive applied there between and capable of conducting high currentssaid adhesive comprising a conductive carrier film comprising carbon fibers,wherein the electrical conductivity of the adhesive is comparable with that of the adjacent composite structures.

The invention relates to an optimised wind turbine blade including: a first component (7) having an aerodynamic profile with a leading edge (11), a blunt trailing edge (13) with a thickness T greater than 2 mm and suction and pressure sides (17, 19) between the leading edge (11) and the blunt trailing edge (13); and a second component (9, 12) for reducing the noise from the blunt trailing edge, having a constant cross-section along the radius of the blade, which is securely joined to the blunt trailing edge (13) of the first component (7) in at least part of the wind turbine blade using coupling means that enable same to be replaced.

A method for applying a serrated rear edge to a blade rear edge of a rotor blade of a wind turbine that has a pressure side and a suction side. The method comprises the steps: disposing the serrated rear edge, with an attaching portion, on a surface of the blade rear edge, and attaching the serrated rear edge, in the region of the attaching portion, to the rotor blade by means of adhesive, the serrated rear edge being disposed on the suction side and being additionally fixed by application of an overlapping material strip to the pressure side, and the material strip being disposed on the pressure side and on the serrated rear edge such that it overlaps a transition between the blade rear edge and the serrated rear edge, or the serrated rear edge being disposed on the pressure side and additionally fixed by application of an overlapping material strip to the suction side, and the material strip being disposed on the suction side and on the serrated rear edge such that it overlaps a transition between the blade rear edge and the serrated rear edge.

The embodiment of the invention discloses a lightning protection circuit. In the lightning protection circuit, a common-mode protection device is arranged on a common power supply line connected with the output end of a power over Ethernet (PoE) power control circuit and an interface area or on a power supply line connected with the input end of the PoE power supply control circuit and a PoE power supply, so that the number of protection devices is reduced as much as possible; therefore, the space of a printed circuit board (PCB) is saved and the design cost of a PoE port is reduced; and simultaneously because the protection devices are connected to a common end of all interface areas, great surge energy can be discharged to realize high-specification lightning protection.

A lightning protection system for a wind turbine includes at least one insulated high-voltage cable, a pick-up unit and an additional insulated high-voltage cable. The at least one insulated high-voltage cable is electrically connected to a lightning receptor and to the pick-up unit. The pick-up unit is electrically connectable to an electrically grounded member by the additional insulated high-voltage cable.

Disclosed is a method and apparatus for charging electrically powered devices. In accordance with the invention, the device is powered by two storage or charge receiving devices. One of these devices is capable of receiving a substantial charge very rapidly while the other device requires a longer time to receive a charge. The advantage is that the powered device can be used almost instantly and continually while at the same time rebuilding electrical charge. The present invention further relates to a system for protecting the charging device from being damaged from an electrical surge, such as from a lightening strike.

Disclosed is a method and apparatus for charging electrically powered devices. In accordance with the invention, the device is powered by two storage or charge receiving devices. One of these devices is capable of receiving a substantial charge very rapidly while the other device requires a longer time to receive a charge. The advantage is that the powered device can be used almost instantly and continually while at the same time rebuilding electrical charge. The present invention further relates to a system for protecting the charging device from being damaged from an electrical surge, such as from a lightening strike.

A power transmission line thunderbolt electromagnetic transient dynamic simulating test system is based on a power transmission line and overhead ground wire model, a pole and tower and pole and tower grounding body model and an insulator model to divide a pole and tower into a diagonal member section, a cross arm section and a principal member section, factors of an insulator, a power transmission line and an overhead ground wire are taken into consideration, and a lighting stroke transient equivalent circuit is simulated and constructed through corresponding wave impedance, self-impedance, mutual impedance, self-admittance, mutual admittance, inductance and the like. The power transmission line thunderbolt electromagnetic transient dynamic simulating test system provides a physical testing platform for collecting a power transmission line lighting stroke current and voltage data. Surge currents are added into different positions of the system, signals of a far-end overhead ground wire and a far-end wire are measured, the transmitting process of a lighting wave in the whole power transmission line can be analyzed, and according to an analyzing result, lighting protection of a lighting protection weak section of the power transmission line and substation equipment is optimized. The characteristic quantity analysis is carried out according to a wave form obtained by the measurement, a pattern recognition method of power transmission line direct stroke and shielding failure flashover can be provided.

The invention provides a system for testing the property of a thunder and lightning traveling wave of a power transmission line. The system consists of a power transmission line thunder and lightning electromagnetic transient movable mold device and an intelligent monitoring device; and on the basis of a power transmission line and lightning conductor model, a pole tower and pole tower grounding body model and an insulator model, the pole tower is divided into a slantwise material section, a cross arm section and a main material section, and in consideration of factors of the insulator, the power transmission line and the lightning conductor, a lightning stroke transient equivalent circuit is built in a simulation way by the corresponding wave impedance, self-impedance, mutual impedance, self-admittance, mutual impedance, inductance and the like. The intelligent monitoring device is formed by the means that a current or voltage sensor is sequentially cascaded with an A / D (analog to digital) convertor, a singlechip, and a display or an oscilloscope. Impact current is added into different positions of the system, so that signals of the lightning conductor and the conductor wire arranged at a far end can be measured, the propagation process of the lightning wave at the whole power transmission line can be analyzed, and the anti-thunder weak section of the power transmission line can be optimized and the lightning protection of substation equipment can be carried out according to an analysis result.

An aircraft assembly having improved durability and capable of providing good lightning protection is provided. Provided is an aircraft assembly (1) equipped with an outer panel (5) that is constructed using an outer-panel resin material reinforced with fiber as a main element; a structural member (7) that supports the outer panel (5) from the inside; and a fastener (3) that joins the outer panel (5) and the structural member (7), the aircraft assembly including an insulator layer (23) having insulating properties and disposed so as to cover at least the head (17) of the fastener (3); and a conductor layer (25) disposed so as to cover at least the insulator layer (23) and formed of a conductor-layer resin material containing copper powder having electrical conductivity.

A lightning protection system for a wind turbine includes at least one insulated high-voltage cable, a pick-up unit and an additional insulated high-voltage cable. The at least one insulated high-voltage cable is electrically connected to a lightning receptor and to the pick-up unit. The pick-up unit is electrically connectable to an electrically grounded member by the additional insulated high-voltage cable.

A method for applying a serrated rear edge to a blade rear edge of a rotor blade of a wind turbine that has a pressure side and a suction side. The method comprises the steps: disposing the serrated rear edge, with an attaching portion, on a surface of the blade rear edge, and attaching the serrated rear edge, in the region of the attaching portion, to the rotor blade by means of adhesive, the serrated rear edge being disposed on the suction side and being additionally fixed by application of an overlapping material strip to the pressure side, and the material strip being disposed on the pressure side and on the serrated rear edge such that it overlaps a transition between the blade rear edge and the serrated rear edge, or the serrated rear edge being disposed on the pressure side and additionally fixed by application of an overlapping material strip to the suction side, and the material strip being disposed on the suction side and on the serrated rear edge such that it overlaps a transition between the blade rear edge and the serrated rear edge.

Method for retrofitting a lightning protection device of a rotor blade of a wind turbine. In the method, a cable section of a lightning protection cable is stripped of insulation. A connection piece and a lightning protection receptor are fitted to the cable section which is stripped of insulation, so that the lightning protection receptor is electrically coupled to the lightning protection cable. The invention also relates to a rotor blade which is retrofitted using the method. The risk of lightning strikes in specific regions of a rotor blade can be reduced by the invention by means of the retrofitting operation.

The invention discloses a multi-chamber-based circuit lightning protection device. The device comprises an installation tool and a multi-chamber arc-extinguishing lightning protection body connected with the bottom of an insulator of a protected circuit; one end of a penetrated clip electrode is connected to the protected circuit; a series main gap is disposed between the other end of the penetrated clip electrode and the multi-chamber arc-extinguishing lightning protection body; an overvoltage produced by lightning strike generates a large electric arc between the conductor and the line and is discharged by two adjacent small electric arc chambers; the high-voltage gas generated during the electric arc release process blows the small electric arc into the air, thereby extinguishing the electric arc. The maximum arc extinguishing time is less than 10MS, the operating voltage is high, and the lightning discharge capability is strong; and meanwhile when the lightning directly strikes onthe circuit, the circuit does not burst due to excessive lightning current. The device is simple in structure, does not need to be grounded and has self-cleaning performance, so the installation is simple and the maintenance is not needed, and the construction and installation cost and long-term operation and maintenance cost of the power supply company can be greatly reduced.

The invention discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting unit. The multiple-pulse synchronous thunder and lightning isolating inhibiting unit comprises a band elimination filter, wherein a first end of the band elimination filter is connected with a port of a strong lightning area; a second end of the band elimination filter is connected with an equipment port of a protected area; and impedance of the band elimination filter increases along with increase of lightning wave frequency. The invention also discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting circuit and meanwhile discloses a multiple-pulse synchronous thunder and lightning isolating inhibiting method. The multiple-pulse synchronous thunder and lightning isolating inhibiting unit, circuit and method has the advantages of avoiding dependence on cable characteristics, enabling most part of invasion of lightning current to be blocked and isolated and taking a good lightning protection effect on protected equipment.

Method for retrofitting a lightning protection device of a rotor blade of a wind turbine. In the method, a cable section of a lightning protection cable is stripped of insulation. A connection piece and a lightning protection receptor are fitted to the cable section which is stripped of insulation, so that the lightning protection receptor is electrically coupled to the lightning protection cable. The invention also relates to a rotor blade which is retrofitted using the method. The risk of lightning strikes in specific regions of a rotor blade can be reduced by the invention by means of the retrofitting operation.

A system for testing the property of a thunder and lightning traveling wave of a power transmission line is formed by a power transmission line thunder and lightning electromagnetic transient movable mold device and an intelligent monitoring device. On the basis of a power transmission line and lightning conductor model, a pole tower and a pole tower grounding body model and an insulator model, the pole tower is divided into a slantwise material section, a cross arm section and a main material section, and in consideration of factors of an insulator, the power transmission line and a lightning conductor, a lightning stroke transient equivalent circuit is built in a simulation manner by using corresponding wave impedance, self-impedance, mutual impedance, self-admittance, mutual admittance, inductance and the like. The intelligent monitoring device is formed by sequentially cascading a current or voltage sensor with an A / D convertor, a singlechip, and a display or an oscilloscope. An impact current is added into different positions of the system, so that signals of the lightning conductor and the conductor arranged at a far end can be measured, the propagation process of the lightning wave in the whole power transmission line can be analyzed, and an anti-thunder weak section of the power transmission line can be optimized and the lightning protection of substation equipment can be performed according to an analysis result.

An anchor for components of a lightning protection system may rely on a bonding agent, such as an adhesive, needing time for curing, drying, or otherwise setting (increasing in adhesion, strength, mechanical stability, or any combination thereof) by remaining in place while setting. The anchor may be suspended by a lip extending horizontally past an edge (plane of intersection of two planar surfaces) where a base plate is adhered to a vertical surface and the lip rests, registers in translation, and squares in rotation against a horizontal surface sharing an edge or fold (corner, bend) with the vertical surface. Once set sufficiently, the adhesive supports loads in shear (along plane of adhesion) and tension (perpendicular to plane of adhesion) imposed by brackets holding a cable, point, or both at each base plate.

The invention discloses a novel electric power cabinet with an energy-saving lamp. The novel electric power cabinet comprises an electric power cabinet main body, a micro dehumidifier, a temperature and humidity detector, an electric power cabinet base, a circuit cabinet and a control cabinet, wherein a lightning arrester is arranged at the top of the electric power cabinet main body through a high-strength bolt; the micro dehumidifier is arranged on one side of the electric power cabinet main body through a mounting frame; a dehumidifying port of the micro dehumidifier is positioned in the electric power cabinet main body; a radiating fan is arranged on the other side of the electric power cabinet main body through a mounting seat; the control cabinet is arranged at the top in the electric power cabinet main body; a control cabinet door is arranged at one end of the control cabinet; an ammeter is arranged at one end of the control cabinet door; an indicator lamp is arranged at the bottom of the ammeter; and a universal conversion switch is arranged on one side of the indicator lamp. The novel electric power cabinet with the energy-saving lamp is powerful in function, scientific indesign, convenient to operate and high in reliability and is suitable for wide promotion.

A lightning protection circuit comprises a lightning protection device. The lightning protection device comprises a first common mode protecting device (RT2), a second common mode protecting device (RT1, RT3) and a differential mode protecting device (D1, D2). The first common mode protecting device (RT2) is connected between a first power supply output lead (+P) and a common port or between a first power supply input lead and the common port, wherein the first power supply output lead (+P) is a common supply lead connected between a first output port of a Power over Ethernet (PoE) power supply control circuit and an interface region, and the first power supply input lead is a supply lead connected between a first input port of the PoE power supply control circuit and a PoE power supply. The second common mode protecting device (RT1, RT3) is connected between a second power supply output lead (-P1, -P2) and a common port or between a second power supply input lead and the common port or between the first power supply input lead and the second power supply input lead, wherein the second power supply output lead (-P1, -P2) is a supply lead connected between a second output port of the PoE power supply control circuit and the interface region, and the second power supply input lead is a supply lead connected between the second input port of the PoE power supply control circuit and the PoE power supply. The differential mode protecting device (D1, D2) is connected between the first power supply output lead (+P) and the second power supply output lead (-P1, -P2). The lightning protection circuit reduces the number of protecting devices, saves PCB space and decreases the design cost for PoE ports. In addition, as all of the interface regions are connected to the common ports via protecting devices, a relatively large amount of surge energy can be released, achieving a high level of lightning protection.

The invention discloses a distribution transformer grounding structure, which comprises a transformer box wall, a first lightning protection grounding line is arranged on the bottom electric wire connection of the high-voltage side lightning arrester; Slot, the block is provided with a bump near the side of the iron core diversion copper bar, and the first lightning protection grounding wire and the second lightning protection grounding wire pass through the rope hole and the groove respectively and are fixed on the terminal screw; A transition copper bar is clamped between the iron core diversion copper bar and the transformer box wall, and a summary terminal is arranged on the iron core diversion copper bar; the high-voltage side grounding post and the low-voltage side grounding post are located in the transformer box One end in the inner cavity of the wall is provided with a wiring ring groove. The invention provides the grounding structure of the distribution transformer, reasonably sets the position and connection mode of the lightning arrester, effectively prevents lightning, and the grounding column is convenient to install. .

An anchor for components of a lightning protection system may rely on a bonding agent, such as an adhesive, needing time for curing, drying, or otherwise setting (increasing in adhesion, strength, mechanical stability, or any combination thereof) by remaining in place while setting. The anchor may be suspended by a lip extending horizontally past an edge (plane of intersection of two planar surfaces) where a base plate is adhered to a vertical surface and the lip rests, registers in translation, and squares in rotation against a horizontal surface sharing an edge or fold (corner, bend) with the vertical surface. Once set sufficiently, the adhesive supports loads in shear (along plane of adhesion) and tension (perpendicular to plane of adhesion) imposed by brackets holding a cable, point, or both at each base plate.

A structural element, in particular for an aircraft, such as an airplane, contains a laminate having a plurality of layers made of a fiber composite plastics material with carbon fibers, a lightning protection layer and optionally an electrically insulating dielectric protection layer. The laminate contains at least one hybrid layer, which comprises a carbon fiber-absorption fiber composite, the elongation at break of the absorption fiber being greater than the elongation at break of the carbon fibers.

The invention discloses a distribution transformer grounding structure, which comprises a transformer box wall, and is characterized in that the bottom of a high-voltage side lightning arrester is connected with a first lightning protection grounding wire through an electric wire; a groove is formed in the end, away from the through hole, of the iron core flow guide copper bar, a protruding blockis arranged on the side, close to the iron core flow guide copper bar, of the clamping block, and the first lightning protection grounding wire and the second lightning protection grounding wire sequentially pass through the rope penetrating hole and the groove and then are fixed to the wiring screw. A transition copper bar is clamped between the iron core flow guide copper bar and the transformerbox wall, and a gathering binding post is arranged on the iron core flow guide copper bar. The ends, located in the inner cavity of the transformer box wall, of the high-voltage side grounding columnand the low-voltage side grounding column are each provided with a wiring annular groove. According to the distribution transformer grounding structure, the position and the connection mode of the lightning arrester are reasonably arranged, effective lightning protection is achieved, the grounding column is convenient to install, the internal structure can be detached and replaced independently,the requirement for stable connection after installation and clamping can be met, and the distribution transformer grounding structure is quite worthy of popularization.

The invention discloses a distribution transformer grounding method which comprises the steps that a transformer box wall is included, and a first lightning protection grounding wire is arranged at the bottom of a high-voltage side lightning arrester in a wire connection mode; a groove is formed in the end, away from the through hole, of the iron core flow guide copper bar, a protruding block is arranged on the side, close to the iron core flow guide copper bar, of the clamping block, and the first lightning protection grounding wire and the second lightning protection grounding wire sequentially pass through the rope penetrating hole and the groove and then are fixed to the wiring screw; a transition copper bar is clamped between the iron core flow guide copper bar and the transformer boxwall, and a gathering binding post is arranged on the iron core flow guide copper bar; and the ends, located in the inner cavity of the transformer box wall, of the high-voltage side grounding columnand the low-voltage side grounding column are each provided with a wiring annular groove. According to the distribution transformer grounding method, the position and the connection mode of the lightning arrester are reasonably set, effective lightning protection is achieved, the grounding column is convenient to install, the internal method can be detached and replaced independently, the requirement for stable connection after installation and clamping can be met, and the method is quite worthy of popularization.