14results about "Active discharge triggering" patented technology

The present invention belongs to the technical field of conductor erection of overhead distribution lines, and specifically relates to a conductor erection structure and method for overhead distribution lines of 10kV and below, wherein the conductor erection structure comprises a conductor, the outer part of the conductor is wrapped with armor, the armor comprises a protective sleeve, and a discharge tip is rotatably arranged in the protective sleeve; a traction head and a connector are respectively arranged at both ends of the conductor, and the traction head is connected to an insulator on a pole tower through a joint; a rotation control mechanism for controlling the rotation of the discharge tip is arranged on the connector, and in the process of controlling the rotation of the discharge tip by the rotation control mechanism, the axis of the discharge tip and the axis of the conductor are in the same plane, and an elastic support rod is also arranged in the protective sleeve, a rotating shaft is rotatably installed on the elastic support rod, a conductive mounting seat is sleeved on the rotating shaft, and the discharge tip is installed on the conductive mounting seat. The present invention can effectively slow down the wear speed of the conductor, and make the conductor have lightning protection performance, thereby improving the service life and safety of the conductor.

The invention is suitable for the technical field of overvoltage protection devices of ultra-high voltage and extra-high voltage power transmission systems, and provides a light-triggered thyristor type controllable lightning arrester, which comprises a triggering device and a bipolar controllable switch connected in parallel with a controllable part of the lightning arrester, wherein the bipolar controllable switch comprises a plurality of first light-triggered thyristors and a plurality of second light-triggered thyristors; the plurality of first light-triggered thyristors are used for forward conduction of the bipolar controllable switch, and the plurality of second light-triggered thyristors are used for reverse conduction of the bipolar controllable switch; the triggering device is used for generating an optical signal when receiving the overvoltage signal; and the optical signal is used for triggering the first light-triggered thyristor or the second light-triggered thyristor to be conducted, so that the bipolar controllable switch bypasses the controllable part of the lightning arrester. The controllable switch of the controllable lightning arrester is subjected to forward and reverse simultaneous control by adopting light triggering, complicated control logic and equipment are not needed, the reliability is high, and the energy consumption is low.

The invention provides a lightning fire risk comprehensive monitoring and prevention and control integrated device, and relates to the field of forest fire prevention. The integrated device comprises a supporting device, an adjusting device, a prevention and control device and an energy storage device, the adjusting device is arranged at the top end of the supporting device, the prevention and control device is arranged on the side wall of the adjusting device in a sliding mode, and the energy storage device is arranged at the top end of the prevention and control device. The supporting device comprises a first fixing plate, a fixing rod is fixedly connected to the middle of the top end of the first fixing plate, a first motor is fixedly connected to the front side of the middle of the top end of the first fixing plate, and a first lead screw is rotationally connected to the top end of the first motor. Through the arrangement of the supporting device, the soil environment is effectively monitored, the generation condition of the lightning fire can be rapidly judged, through the arrangement of the adjusting device and the prevention and control device, timely prevention and control of thunder and lightning are effectively achieved, and through the arrangement of the energy storage device, energy is saved. And the device can be effectively ensured to continuously and normally operate in a forest environment without sunlight or with unstable power supply.

The present disclosure relates to a shielding device against atmospheric discharges. The device comprises a first conductive element and a second conductive element that passes through the first conductive element, wherein both conductive elements are electrically insulated by means of a first insulating body, and a second insulating body that are connected to the ends of the first conductive element and the second conductive element. Additionally, the device comprises a third conductive element that passes through the second conductive element that is connected to a fourth conductive element. The fourth conductive element is connected to one of the ends of the first and second conductive elements, and the shape of the fourth conductive element prevents the generation of a corona effect in the presence of an electric discharge. In addition, the third conductive element allows the lightning shielding device to be connected to a grounding element, thus concentrating the electric discharge only in the lightning shielding device, acting as an electric capacitor, and producing the flow of electric charge towards the grounding element, preventing the discharge from spreading to structures or people around.

A method for preventing lightning strikes continuously for multiple times, which uses the method of rotating multiple groups of lightning arresters to prevent lightning strikes; when being struck by lightning, when being struck by lightning, the lightning arresters in the first working area and the lightning arresters in the second working area are simultaneously impacted by high voltage. The lightning arresters in the first working area work normally and discharge to the ground; the capacitor connected in parallel with the lightning arresters in the second working area is charged through the first lightning strike. When being struck by the second lightning strike, the lightning arresters in the second working area discharge to the ground; after discharging to the ground, the moving contact support rotates to rotate the working area, and the above process is repeated. By using the lightning protection method and lightning arresters of the present invention, the lightning arresters rotate and are detected during the rotation process, and the lightning arresters that have failed can be cut out in time, and the qualified lightning arresters can be placed in front to receive lightning strikes, which can effectively cope with multiple consecutive lightning strikes and avoid losses caused by reasons such as the failure of lightning arresters during multiple consecutive lightning strikes.

The invention discloses a photovoltaic metal roof lightning protection system, the photovoltaic metal roof comprises roof panels, photovoltaic panels and connecting pieces, the roof panels are fixedly arranged on a lower rigid structure, the photovoltaic panels which are spliced in sequence are fixedly arranged above the roof panels, a middle support is arranged between every two adjacent roof panels, and the connecting pieces are connected with the middle support. Fixing pressing blocks are arranged above the connecting pieces, and photovoltaic panels are laid on the two sides of the connecting pieces; a lightning-protection support is arranged between every two adjacent roof panels, a lightning-protection metal sheet with one end extending out of the roof panels is arranged on each lightning-protection support, and the lightning-protection supports are fixedly connected with a steel structure below the lightning-protection supports to form a conductive whole. The photovoltaic roof lightning protection device can be installed on an original roof structure layer, a waterproof layer does not need to be damaged, the lightning protection performance of a photovoltaic roof can be improved only through a small metal sheet, the influence of a roof panel surface coating on the conductivity is avoided, and consumed and used materials are fewer.

The application is suitable for the technical field of over-voltage protection device of super-high voltage and extra-high voltage transmission system, and provides a controllable arrester based on self-triggering air-gap switch, which comprises an arrester fixed part, an arrester controllable part, a bypass capacitor high-voltage part, a bypass capacitor low-voltage part, an air-gap switch and an intermediate bridge valve group; the arrester fixed part, the arrester controllable part, the bypass capacitor high-voltage part, the bypass capacitor low-voltage part and the intermediate bridge valve group form an electric bridge structure, and the air-gap switch is connected in parallel with the bypass low-voltage part; the capacitance ratio of the bypass capacitor low-voltage part to the bypass capacitor high-voltage part is less than the rated voltage ratio of the arrester fixed part and the arrester controllable part. The short circuit of the arrester controllable part is realized through the cooperation of electrical parameters, the over-voltage can be protected in time, the influence caused by the dispersion of the air-gap switch action is avoided, a complex control system is not needed, and the device is less and the structure is simple.

According to one implementation of the present disclosure, a method is disclosed. The method includes: detecting, on or proximate to one or more surfaces of an aircraft, a presence of an electric-field above a predetermined threshold; and in response to the detection, activating one or more beam sources to generate an ionized column of charge away from the aircraft.

The lightning induction device includes a projection rod, an intermediate conductor, a lowermost conductor, and a switch unit. The projection rod, the N intermediate conductors, and the grounded lowermost conductor are coupled in an upward direction via the N+1 switch units, and all of the switch units are turned on, so that the projection rod and all of the intermediate conductors are instantaneously grounded.

The subject of the invention is a lightning rod with a lightning protection system isolated from the protected facility, equipped with a power supply and control unit monitoring its head, which is characterized by the lightning rod head (1) consisting of a metal cylindrical housing (2) with an upper bottom (4), detachably connected to the blade (6), inside which its symmetry axis, there is an initiating system (7) entwined with the upper helical part (8) of the optical fiber (9.9'), electrically connected to this blade (6), and with the other end through the spark gap (15) electrically connected with the upper surface of the metal profile connector (17) and mechanically - inseparably with the sleeve shoulder (18) with the axial hole (29) of this connector with two through holes (27 and 28) made in it opposite the axial hole (29), in which both lower ends (8') of the spiral part (8) of the optical fiber (9, 9') are placed, and its further parts through the hole in the metal the connecting sleeve (35) and the through hole (39) of its bottom (37) and through the hole of the two-piece mast (42) and the through hole (56) of the metal tubular element (45) of this mast go out so that one end of the optical fiber (9, 9') is located opposite the LED light transmitter (57) of the power supply, control and monitoring unit (58) and the other end of this optical fiber is opposite the LED light receiver (59), while the insulated end (64) is connected to the connecting sleeve (35) of the insulated high voltage wire (65), the lower end of which is embedded in the ground (67) and connected to earthing (68) .

The invention discloses a wind power plant lightning protection device and method, and the device comprises a suspension part which is provided with a lightning current receiving unit; the flow guide lines are installed on the outer side of the suspension part, the multiple flow guide lines are arranged along the outer side of the suspension part, and the angle difference between every two adjacent flow guide lines is 45 degrees; one end of each bonding assembly is connected with the suspension part, the other end of each bonding assembly is connected with a fixing unit through a connecting part, and the fixing units are used for being connected with ground anchor points; one end of the grounding wire is connected with the suspension part, and the other end is connected with a grounding assembly. The suspension part is arranged above the wind power plant, the lightning current receiving unit at the top of the suspension part is used for receiving current generated by lightning flashover and lightning and transmitting the current to the ground, and the damage of lightning stroke is effectively avoided; and secondly, the diversion wires are arranged at intervals along the outer side of the suspension part at an angle of 45 degrees, so that the received lightning current can be more uniformly dispersed to multiple directions, the local current density is reduced, and the service life of the lightning protection device is prolonged.

This lightning conduction device comprises a protruding needle 11, intermediate conductors 12, a lowest-section conductor 13, and switch units 20. The protruding needle 11, N intermediate conductors 12, and the grounded lowest-section conductor 13 are connected in the sky direction with N+1 switch units 20 interposed therebetween. By turning all of the switch units 20 ON, the protruding needle 11 and all of the intermediate conductors 12 are instantly grounded.

The invention discloses a multistage buffering lightning protection circuit device and a mobile terminal, and relates to the technical field of circuit lightning protection. The device specifically comprises a trapping device, a voltage protection module, a first-stage buffer circuit and a second-stage buffer circuit, the voltage protection module is electrically connected with the second end of the trapping device, and the voltage protection module is used for suppressing transient overvoltage of thunderstorm cloud; the first-stage buffer circuit is electrically connected with the voltage protection module, and the first-stage buffer circuit buffers and stores the lightning current as first-stage current; and the second-stage buffer circuit is electrically connected with the first-stage buffer circuit, converts and stores the first-stage current into second-stage current, and outputs the second-stage current to a connectable terminal device. The lightning guide line is arranged in a strong electric field area, and lightning energy is buffered and absorbed step by step by using a hierarchical circuit topology, so that equipment is prevented from being punctured by instant overvoltage, and active safety protection is realized.

The invention is applicable to the technical field of overvoltage protection devices of ultra-high-voltage and extra-high-voltage power transmission systems, and provides a controllable lightning arrester based on an autonomous triggering air gap switch, which comprises a lightning arrester fixed part, a lightning arrester controllable part, a bypass capacitor high-voltage part, a bypass capacitor low-voltage part, an air gap switch and an intermediate bridge valve plate group, the lightning arrester fixed part, the lightning arrester controllable part, the bypass capacitor high-voltage part, the bypass capacitor low-voltage part and the intermediate bridge valve plate group form a bridge structure; the air gap switch is connected with the bypass low-voltage part in parallel; and the capacitance ratio of the bypass capacitor low-voltage part to the bypass capacitor high-voltage part is smaller than the rated voltage ratio of the lightning arrester fixed part to the lightning arrester controllable part. According to the invention, the short circuit of the controllable part of the lightning arrester is realized through the cooperation of electrical parameters, the overvoltage can be protected in time, the influence caused by the dispersivity of the action of the air gap switch is avoided, a complicated control system is not needed, the number of devices is small, and the structure is simple.