31results about "Active discharge triggering" patented technology

The invention relates to a device for protecting against the electric effect of a physical phenomenon capable of inducing the ionisation of the medium in which it occurs, such as lightning. The device includes: means (3, 4, 5) for detecting the on-coming physical phenomenon; at least one physical phenomenon collector (1, 2) for collecting the effect of the physical phenomenon; and means (7) for initiating the collection by the collector, capable of generating an ionised channel from the collector and monitored by the detection means. The detection means are electrically insulated from the collector and include a corona effect detector capable of directly detecting a corona effect occurring at the collector.; Therefore, by observing the natural ionisation phenomenon or corona effect induced by the on-coming phenomenon and by detecting same, it is possible to trigger the action of the collector at the right moment.

A system, method and software for protecting wind turbines from lightning strikes, as well as a wind turbine comprising the system for lightning protection, wherein at least one lightning strike protection element of said LSP system is ionized prior to a lightning strike, thus reducing the chance of damaging unprotected part(s) of the blade(s) of the wind turbine.

The present invention relates to an arrester, comprising: a rod member coupled to a ground means at one end in the longitudinal direction and charged with charges of the ground; a plurality of insulators provided to be spaced from each other in the longitudinal direction of the rod member; an charging plates provided between the neighboring insulators separately from the rod member so as to be electrically insulated and charged with a polarity opposite to that of the charges of the ground; a charging tube provided between the charging plates and the insulators, electrically connected to the charging plates, and charged with charges having a polarity opposite to that of the charges of the ground; a needle electrode member provided to the upper end of the rod member and having a needle-shaped part; and a discharge induction conductor electrode electrically connected to the charging plates between the insulators and the charging plates so as to induce discharge between the needle electrode member and the discharge induction conductor electrode and emit ion charges through the discharge, thereby forming a discharge path between a thundercloud and the needle electrode.

The invention provides a regional active lightning protection system and a mounting information determination method and relates to the technical field of regional lightning protection. The regional active lightning protection system is used for carrying out lightning protection of a to-be-protected region, wherein the to-be-protected region comprises a to-be-protected object, and the regional active lightning protection system comprises a plurality of lightning arresting devices and a controllable return stroke discharge direct lightning protection device. On one hand, the lightning arrestingdevices are arranged on the periphery of the to-be-protected area and used for attracting, intercepting and releasing thunder and lightning in the to-be-protected area, on the other hand, the controllable return stroke discharge direct lightning protection device is arranged in the to-be-protected area and is used for reducing the electric field intensity between a lightning downlink pilot and the to-be-protected object in the to-be-protected area and preventing a lightning current from being discharged into the ground through the to-be-protected object. The regional active lightning protection system is advantaged in that the ground lightning density in the to-be-protected area is effectively reduced, and the lightning protection effect is improved.

The invention provides a thyristor switch type controllable lightning arrester which comprises a lightning arrester controlled part, a thyristor valve, a first connection module and a second connection module. The first end of the lightning arrester controlled part is electrically connected with the first end of the thyristor valve via the first connection module, the second end of the lightning arrester controlled part is electrically connected with the second end of the thyristor valve via the second connection module, the first connection module is disconnected according to a disconnectioninstruction, a first feedback signal of disconnection of the first connection module is sent to the second connection module, the second connection module rotates the thyristor valve from a first position to a second position according to the first feedback signal, when a second feedback signal which indicates replacement of the thyristor valve is completed, the thyristor valve is rotated from thesecond position back to the first position, a third feedback signal is sent to the first connecting module, and the first connection module is closed according to the third feedback signal. Thus, thethyristor valve is maintained in the live-line manner, and the reliability and anti-risk capability of a system are improved.

The invention discloses a method, device and equipment for determining discharge path control parameters of an insulator, and the method comprises the steps: determining the numerical range of a discharge gap of the insulator according to a positive 50% lightning impulse discharge voltage and a power frequency wet withstand voltage; determining the voltage range of the internal insulation and thevoltage range of the external insulation according to the lightning impulse discharge voltage range and the power frequency dry withstand voltage range corresponding to the numerical range of the discharge gap; determining internal insulation distance of the insulation section and external insulation distance of the insulation section; and determining the numerical range of the discharge gap, theexternal insulation distance of the insulation section and the external insulation distance of the insulation section as the discharge path control parameters of the insulator. According to the application, the discharge path control parameters of the insulator are determined, so that the insulator designed based on the discharge path control parameters does not discharge along the internal insulation but discharges along the discharge gap under the conditions of lightning stroke and the like, and the risk of ablation of the insulating layer of the insulator under the lightning stroke is reduced.

The invention relates to a discharge gap device for line lightning protection. The device comprises a discharge gap lower electrode plate, a fixed support insulator and a discharge gap upper electrodeplate. A power frequency current limiter is arranged on the discharge gap upper electrode plate. A discharge gap upper electrode is arranged on the discharge gap upper electrode plate, a discharge gap lower electrode is arranged on the discharge gap lower electrode plate, and a first discharge gap is formed between the discharge gap upper electrode and the discharge gap lower electrode; the discharge gap lower electrode plate is also provided with a group of detachable discharge gap auxiliary electrodes, and a second discharge gap is formed between the discharge gap auxiliary electrodes and the discharge gap upper electrode. The discharge gap device for line lightning protection can effectively solve the problems that a discharge gap structure of an existing power-frequency-free follow-current discharge gap device is provided with a single discharge gap, when energy generated by overvoltage is large, the gap is broken down and discharged, the energy of the overvoltage cannot be completely released, and redundant energy can still harm normal operation of a distribution line.

The invention discloses a lightning arrester. The lightning arrester comprises a telegraph pole, and a locking mechanism is arranged on the left end surface of the telegraph pole. The locking mechanism comprises a supporting plate, a supporting block is fixedly connected to the upper end surface of the supporting plate, a supporting hole is formed in the supporting block, and the upper and lower end walls of the supporting hole penetrate through the upper and lower end surfaces of the supporting block. An air pressure groove is formed in the left end surface of the supporting block, and the left end wall of the air pressure groove communicates with the outside space. Sliding spaces are formed in the right end wall of the air pressure groove in a front-and-back symmetric mode, and the rightend walls of the sliding spaces communicate with the outside space. Roller spaces are formed in the upper end walls of the sliding spaces in a front-and-back symmetric mode. The lightning arrester issimple in structure and convenient to operate, during work, the lighting arrester can be enabled to work when wind in any direction reaches a certain intensity, so that it is ensured that high-voltage cables of which front and rear parts are clamped are prevented from shaking violently, and the connection between the high-voltage cables and the arrester is ensured.

The invention discloses an active lightning protection system and method for moving objects. The active lightning protection system for moving objects comprises: a follower which is electrically insulated from the moving object and moves with the moving object through a connecting member: a lightning receiver, arranged on the follower for receiving a lightning strike according to a high voltage applied on the lightning connector opposite to a lightning strike voltage polarity; a lightning strike monitoring control device arranged on the moving object for monitoring a lightning strike state andapplying a high voltage opposite to a lightning strike voltage polarity to the lightning connector; a discharge unit arranged on the follower and connected with the lightning connector, and discharging the lightning strike current received by the lightning connector from the lightning connector; the moving object and the follower are separated by the connecting member by a predetermined safe distance. The invention can position the lightning drop point of the lightning strike locally and releasing the lightning current safely in the maneuver actively.

The invention provides a laying method and device for indirect grounding of a lightning conductor of a power distribution network. The method is characterized in that lightning impulse breakdown voltages and power frequency breakdown voltages under different air gap distances are obtained; according to the lightning impulse breakdown voltages, a 99.9% probability relation function of the lightningimpulse breakdown voltage and the gap distance is obtained; a 0.1% probability relation function of the power frequency breakdown voltage and the gap distance is obtained according to the power frequency breakdown voltages; an air gap d and an air gap s are respectively obtained according to a lightning impulse voltage conduction threshold value and a single-phase grounding short circuit power frequency voltage; an air gap distance range (s, d) is obtained according to the air gap s and the air gap d; the air gap with the distance range of (s, d) is connected with a composite insulator in parallel to obtain a parallel structure; the parallel structure is laid between a grounding electrode and the lightning conductor; the parallel structure is installed between the lightning conductor andthe grounding electrode by utilizing the voltage withstanding characteristic of the composite insulator and the discharge characteristic of the air gap, and indirect grounding between the lightning conductor and the grounding electrode is realized.

A lightning direction device is provided. The lightning direction device includes a drag member, a pendant mass and a conductor. The drag member is configured to have a select amount of wind resistance. The pendant mass has a select weight and shape. Moreover, the conductor is coupled between the pendant mass and the drag member.

The invention discloses an intelligent lightning arrester capable of blocking carriers. The lightning arrester is composed of a lightning protection device and a mounting base device, wherein the lightning protection device comprises a lightning arrester; a first transmission cavity is formed in the lightning arrester; a first bevel gear is arranged in the first transmission cavity; a first transmission shaft is fixedly arranged in the middle of the back end plane of the first bevel gear; the left end plane of the first bevel gear is connected with a second bevel gear in a meshed mode; and theaxis of the second bevel gear is fixedly connected with a bidirectional screw rod which runs through left and right. The intelligent lightning arrester is composed of the lightning protection deviceand the mounting base device, so that the lightning arrester can be conveniently installed and disassembled; a locking rod is inserted into a locking groove, so that it is guaranteed that the lightning arrester is stably connected with the base under the normal condition; the current which passes through the lighting arrester is stably transmitted; and finally the circuit in the lightning arrestercan be automatically cut off in the lightning weather through an induction electromagnetic block, and the over-large currents are guided into the underground, so that the stability of electricity utilization of residents is guaranteed.

The invention relates to a circuit flashover protector. The circuit flashover protector comprises a discharge sphere gap, an equipotential connection fitting and a flashover protector body, wherein the equipotential connection fitting is connected with the flashover protector body to achieve equipotential connection of the flashover protector body, a wire is connected to the equipotential connection fitting, the flashover protector body is connected with the wire by a drainage line and is arranged at a load side of a line route of the wire, the discharge sphere gap is fixed in series on the flashover protector body, isolation with the wire is achieved by the discharge sphere gap, and the drainage line and the wire are arranged in an inclination way. The circuit flashover protector has the advantages that the isolation with the wire is achieved by the discharge sphere gap, a leakage current can be enabled not to flow through the flashover protector body during normal running, and the service lifetime of the flashover protector body is prolonged; and by isolation of the discharge sphere gap, a grounding fault of the circuit cannot be caused when the flashover protector body is damaged, and the normal running of the circuit is ensured.

The invention discloses a lightning arrester capable of blocking carrier waves, comprising a lightning protection device and a mounting base device, the lightning protection device comprises a lightning arrester, a first transmission cavity is arranged in the lightning arrester, a first bevel gear is arranged in the first transmission chamber, a first rotating shaft is fixedly arranged in the middle position of the rear end face of the first bevel gear, a left end face of the first bevel gear is in meshed connection with a second bevel gear, and a left-right through bidirectional screw rod isfixedly connected to shaft center of the second bevel gear. The lightning arrester provided by the invention is composed of the lightning protection device and the mounting base device, is convenientfor mounting and dismounting of the lightning arrester, and insertion connection of the locking rod and the locking grooveensures that the lightning arrester is stably connected with the base under normal conditions, the current is stably transmitted through the lightning arrester, and finally the line in the lightning arrester can be automatically cut off through the induction electromagnetic block in the lightning weather, and the excessive current is led into the underground, thereby ensuring the stability of the power consumption of the residents.

The invention discloses a multi-time continuous lightning stroke lightning protection method. Lightning protection is carried out in a mode of alternating multiple groups of lightning arresters; whenbeing attacked by lightning, the first working area lightning arrester and the second working area lightning arrester are impacted by high voltage at the same time, and the first working area lightning arrester works normally and discharges to the ground; a capacitor connected in parallel with the second working area lightning arrester is charged through first lightning stroke, and the lightning arrester in the second working area discharges to the ground when being subjected to the second lightning stroke; and after discharging to the ground, a movable contact bracket rotates to alternate theworking areas, and the process is repeated. According to the lightning protection method, the lightning arresters are alternated and carrying out detection alternation process, the failed lightning arrester can be cut out in time, the qualified lightning arrester is arranged in front to receive lightning stroke, multiple continuous lightning strokes can be effectively coped, and losses caused bylightning arrester failure and other reasons during multiple continuous lightning strokes are avoided.

A method for reducing destructive power of a lightning stroke low-voltage line is used for being applied to a power transmission line composed of at least two towers and a three-phase power transmission line and comprises the steps that a line lightning arrester and a grounding wire are electrically connected, and the line lightning arrester is arranged to be matched with the power transmission line to form a line lightning protection module; an uplink pilot discharge conductor is arranged at a position higher than the power transmission line and the uplink pilot discharge conductor and a grounding wire are electrically connected. The lightning protection device comprises a connecting wire, a grounding electrode, the uplink pilot discharge conductor and the line lightning arrester, and thetop end of the uplink pilot discharge conductor is arranged at a position higher than a power transmission line, so that the grounding line to which the uplink pilot discharge conductor belongs formsan uplink pilot discharge module; and the line lightning arrester is arranged at a position matched with the power transmission line, so that the grounding line to which the line lightning arrester belongs forms a line lightning protection module between two adjacent uplink pilot discharge conductors. The low-voltage line lightning protection system comprises a power transmission line and a lightning protection device. And the damage degree of lightning stroke to the power transmission line and equipment connected with the power transmission line can be reduced.

A lightning protection system is provided for a wind turbine blade via charge initiation (Charge Initiated Lightning Protection). The lightning protection system includes at least one electric charge generator for generating electric charge at a lightning receptor of the wind turbine blade such that an electrostatic field is generated at the lightning receptor leading lightning current directly to the lightning receptor. Additionally a wind turbine blade having at least one such lightning protection system is provided.

The invention provides a lightning protection active interception device for a high-voltage overhead insulated line, and belongs to the technical field of lightning monitoring and protection. A lightning protection active interception device for a high-voltage overhead insulation line comprises a lightning rod, a conductive lead connected with the lightning rod and a grounding device connected with the conductive lead, the lightning rod is installed on an independent insulation supporting rod, and the lightning rod comprises a lightning arrester and a fixed insulation sleeve for installing the lightning arrester. The insulating support rod is fixed on a spacer in a high-voltage overhead line, and the conductive lead is connected with the lightning rod arranged on the spacer. The lightning arrester is arranged on a traditional high-voltage overhead insulation line and connected with the grounding device, the situation that the insulation line is damaged due to the fact that thunder and lightning directly hits the insulation line is avoided, the insulation conductive interlayer is additionally arranged to conduct grounding transfer on the possibly generated strong electromagnetic effect, and the safety of the line is protected to the maximum degree.

The invention discloses a lightning protection configuration method for a newly-built power distribution network. The lightning protection configuration method comprises the following steps: determining a lightning area grade of an area where each power distribution line in the newly-built power distribution network is located and an importance degree grade of power distribution network equipment; determining the lightning protection grade of the distribution line according to the lightning area grade of the area where the distribution line is located and the importance degree grade of power distribution network equipment; and configuring a corresponding lightning protection measure for each distribution line of the newly-built distribution network according to the lightning protection level of the distribution line. According to the embodiment of the invention, the effectiveness and pertinence of lightning protection measures of the newly-built power distribution network can be effectively improved, and the efficiency and economic benefits of lightning protection work are improved.