31results about "Active discharge triggering" patented technology

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 lightning protection system (2) for a wind turbine blade (1) via charge initiation (Charge Initiated Lightning Protection, CILP). The lightning protection system comprises at least one electric charge generator (20) for generating electric charge at a lightning receptor (21) of the wind turbine blade (1) such that an electrostatic field is generated at the lightning receptor (21) leading lightning current directly to the lightning receptor (21). Additionally the invention provides a wind turbine blade (1) having at least one such lightning protection system (2). The Charge Initiated Lightning Protection system is an efficient and easy way for protecting a wind turbine blade (1) from the effect of a lightning stroke. Just by rotating the wind turbine blade (1) electric charge can be concentrated at the lightning receptor (21) guiding the lightning current and avoiding the puncture of the blade surface of the wind turbine blade (1) as a result of a lightning stroke.

The present invention relates to means for protecting various purpose facilities against damages when they are exposed to an intensive action of atmospheric electricity, in particular to means for protecting buildings and structures against lightning. The active lightning conductor comprises a housing with a cover, an active lightning-receiving unit connected in series to a high-voltage impulse generator excited by an external lightning-induced magnetic field, and to a contact element of a grounding system. The generator comprises at least two charging resistor circuits as well as a multiunit arrester made as at least one capacitive discharge circuit composed of in-line alternating capacitors each of them having two charging plates with arresters. The charging circuit resistors are divided into two groups the resistors of one of them being connected to the upper capacitor plates and the resistors of the second group being connected to the lower capacitor plates. The electromagnetic parameters of the lightning conductor provide for a possibility to charge the capacitors from an external electric field at a critical active lightning voltage of the last until a level sufficient to form and to execute a preventive discharge providing for the formation of a leader sent via the lightning-receiving unit to meet the striking leader from an external lightning, but in this case said capacitor electric capacitance and said ohmic resistance of the interlayers between the capacitor plates and the arrester protrusions are adopted with values providing for the possibility of a reach-through breakdown of the arresters in this circuit and the possibility of a short-circuit of the lightning-receiving unit with the contact element of the grounding system at a lightning discharge. The lightning-receiving unit is made as a multirod rim with a central rod and side rods. The lightning conductor is provided with an external discharge circuit composed of couples of current-carrying arresters. Each arrester of one couple is electrically coupled to one arrester of another couple. One arrester of the upper couple is electrically linked to the lightning-receiving unit, and one arrester of the lower couple is linked to the contact element of the grounding system. The arresters of adjacent couples are located on the housing with a partial shift in the plan view relative to the previous and / or following couple of arresters.The technical result resides in the improvement of structural, technological and operating performance of the lightning conductor, in the improvement of the device operation reliability and in the provision of improved protection of facilities against damages due to lightning discharge hits.

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.

A lightning protection system of an aircraft when it is electrically powered on the ground by a generator set is described. Such an aircraft consequently includes a fuselage and a connecting connector to allow the connection to the generator set. The connecting connector includes a frame, male electrical contacts protruding on either side of said frame, and a lightning protection system inserted between the male electrical contacts and electrical elements of the aircraft. The protection system includes peak-clipping devices for clipping an electrical signal and a printed circuit having conductive tracks linking the male electrical contacts to the peak-clipping devices.