Flat gap lightning arrester based on short arc potential drop and near cathode effect stacking

A near-cathode and surge arrester technology, which is applied in the field of flat gap arresters, can solve the problems of lightning protection function failure, damage to multi-gap structures, and difficult processing, so as to reduce the tripping rate due to lightning strikes, overcome failure and moisture, and reduce the arc establishment rate. Effect

Active Publication Date: 2017-10-10
武汉水院电气有限责任公司
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Problems solved by technology

Under the dual effects of thermal effect and electromagnetic power, the fixed position of the discharge electrode is prone to change and damage the multi-gap structure, which makes the lightning protection characteristics of the multi-gap arrester change, which seriously leads to the failure of its lightning pr...

Method used

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  • Flat gap lightning arrester based on short arc potential drop and near cathode effect stacking
  • Flat gap lightning arrester based on short arc potential drop and near cathode effect stacking
  • Flat gap lightning arrester based on short arc potential drop and near cathode effect stacking

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Embodiment Construction

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] Such as figure 1 , figure 2 The flat gap surge arrester based on the superposition of short-arc drop and near-cathode effect is shown, including insulating mandrel 20, several flat discharge electrodes 10, fixing seat 40, low voltage electrode 50, main gap discharge electrode 30, and silicone rubber outer sheath 60 And the silicone rubber umbrella disk 70, several flat discharge electrodes 10 are axially evenly and parallelly threaded on the insulating mandrel 20. In addition, in this embodiment, if Figure 6 As shown, the holder 40 includes a cylindrical holder body 44, an insulating mandrel fixing hole 42 provided in the cylindrical holder body 44, an electrode fixing hole 41 provided in the cylindrical holder body 44, and an electrode fixing hole 41 provided in the cylindrical holder body 44. The metal fitting fixing hol...

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Abstract

The invention relates to a flat gap lightning arrester based on short arc potential drop and near cathode effect stacking; the flat gap lightning arrester comprises an insulation core rod, a plurality of flat discharge electrodes axially sleeving the insulation core rod, a fixed seat arranged on the low voltage end of the insulation core rod, a low voltage electrode inserted into the fixed seat, a main gap discharge electrode arranged on the insulation core rod high voltage end, and a silicone rubber oversheath made by a silicone rubber sulfuration technology, wherein the silicone rubber oversheath is used for fixing the insulation core rod, the plurality of flat discharge electrodes, the fixed seat, and the main gap discharge electrode; the plurality of flat discharge electrodes are evenly arranged in parallel; no zinc oxide resistance card is needed, thus providing green and environmental protection effect, and solving the problems that the zinc oxide resistor disc is prone to fail and get wet; the arc extinguishing mechanism comprises near cathode effect stacking, near electrode potential drop stacking and chamber arc blow-out, thus effectively reducing the arc over rate caused by lightning stroke on an aerial conductor, and effectively reducing the line lightning stroke trip-out rate under extreme conditions like a heavy thunder area and severe moisture and dirty environment.

Description

technical field [0001] The invention relates to the technical field of lightning protection for high-voltage transmission lines in electric power systems, in particular to a flat-plate gap arrester based on superposition of short-arc drop and near-cathode effect. Background technique [0002] With the continuous in-depth research of power system line arresters, the application of various new arresters is developing rapidly. The multi-gap arrester is designed for lightning protection by utilizing the characteristics of multi-section arcs generated by gas gap discharge in high-voltage technology. In the actual application process, the discharge electrode will be loosened between the external surface of the discharge electrode and the external structure due to thermal expansion and contraction due to the thermal effect of the arc burning; under the action of lightning impulse current, the discharge electrode will be Displacement or even falling off is caused by the explosive f...

Claims

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Application Information

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IPC IPC(8): H01T4/18H01T4/20H01T4/02
CPCH01T4/02H01T4/18H01T4/20
Inventor 齐小军邱凌戴兵李小堂李自怀李雄
Owner 武汉水院电气有限责任公司
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