Arc extinction device and method for transmission and distribution line

A technology for power transmission and distribution lines and arc extinguishing devices, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of difficult adjustment of gap distance and arc extinguishing reaction speed Slow, always exist and other problems, to achieve the effect of breaking power frequency current, timely and reliable cutting off, and fast turning off speed

Pending Publication Date: 2020-02-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretical research and applied research show that although the existing lightning protection devices have a good effect on lightning protection, there are still deficiencies. For example, the arc extinguisher can only extinguish a small power frequency current. , the arc cannot be effectively extinguished, and the arc will always exist; the arc extinguishing reaction speed is slow, and the power frequency arc cannot be extinguished quickly; the gap distance is not easy to adjust, and the limited voltage of the lightning protection gap cannot be adjusted
These problems will affect the stable and safe operation of the power system, and bring hidden dangers to the power system, enterprises and people's production and life.

Method used

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  • Arc extinction device and method for transmission and distribution line
  • Arc extinction device and method for transmission and distribution line
  • Arc extinction device and method for transmission and distribution line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see Figure 1 to Figure 3 , the present invention provides an arc extinguishing device for power transmission and distribution lines, which includes a fixed insulator string 1 installed between the cross arms, an upper hanging plate 2, an upper connecting plate 3 and a lower hanging plate respectively arranged in sequence at the upper and lower ends of the fixed insulator string 1. The upper part of the upper connecting plate 3 is connected with the cross arm, the lower part of the lower connecting plate 5 is connected with the power transmission and distribution line through the U-shaped hanging ring 6, and the side of the fixed insulator string 1 is provided with an arc extinguishing mechanism , which is characterized in that the arc extinguishing mechanism includes two angle adjusters 110 respectively arranged on one side of the upper end connecting plate 3 and the lower end connecting plate 5, wherein the upper angle adjusting device 110 is connected to the arc extin...

Embodiment 2

[0045] On the basis of Embodiment 1, an arc extinguishing method based on the arc extinguishing device of the transmission and distribution line:

[0046] S1. Connect arc extinguishers in parallel at both ends of the fixed insulator string, and configure upper and lower arc strike rods as protective gaps;

[0047] S2. When the voltage exceeds the limited voltage of the protection gap of S1, the protection gap is broken down to generate power frequency short-circuit freewheeling;

[0048] S3, under the effect of S2, an induced current is generated in the induction coil, and an electromagnetic force is generated in the electromagnetic drive coil;

[0049] S4. Under the action of the electromagnetic force of S3, the movable contact is driven to effectively shut off the arc extinguisher, and the arc on the protection gap will disappear naturally.

[0050] S5. When the arc disappears, there is no induction current on the induction coil, the electromagnetic force disappears, and th...

Embodiment 3

[0052] On the basis of Embodiment 1, the recliner 110 is a rectangular plate, and one side of the recliner 110 is provided with a connecting plate mounting hole 111 for fixed installation with the upper and lower connecting plates, and the connecting plate mounting hole 111 A fixing hole 112 is provided at the corner of the opposite side, and a plurality of adjusting holes 113 are arranged in a circumferential array around the fixing hole.

[0053] The upper and lower recliners 110 are respectively connected to the arc extinguisher 200 and the lower arc striker 103 through two connecting plates. The middle part of the connecting plate corresponds to the fixing hole 112 to set a connecting plate fixing hole, and one end of the connecting plate corresponds to the adjusting hole 113. The other end of the upper connecting plate is fixedly connected to the arc extinguisher 200 , and the other end of the lower connecting plate is fixedly connected to the lower arc striker 103 through...

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Abstract

The invention discloses an arc extinction device and method for a transmission and distribution line and relates to the technical field of protection of a power system. According to the technical scheme, an arc extinction mechanism is arranged at one side of a fixed insulator string, the arc extinction mechanism comprises an arc extinguisher, starting rods, an upper yoke plate and a lower yoke plate, the upper part of the insulator string is connected with the arc extinguisher, the arc extinguisher is connected with one end of the upper starting rod, and the lower part of the insulator stringis connected with one end of the lower starting rod. The arc extinction device has the beneficial effects that compared with an existing lightning protection gap, the device has the advantages of being capable of quenching power-flow current and guaranteeing that a line does not trip. Compared with a zinc-oxide arrester, the arc extinction device has the advantages of being switched off rapidly, having long service life, and being capable of cutting large industrial frequency current. Compared with an existing air-jet arc extinction lightning protection gap technology, the device has the advantages of being capable of cutting power-flow current timely and reliably, being reusable and having long service life.

Description

technical field [0001] The invention relates to the technical field of power system protection, in particular to an arc extinguishing device and method for power transmission and distribution lines. Background technique [0002] The information society has continuously put forward new requirements for the reliability of power supply, and the lightning failure rate ranks first among all kinds of failure rates in the power system. When the line overvoltage caused by lightning strikes, the insulator string flashover develops into a stable power frequency arc, which will damage the insulator string and form a permanent fault; furthermore, it will cause the relay device to trip and the recloser to fail. [0003] The lightning protection gap is a device that guides the lightning current on the line to the ground through the breakdown gap, which can protect the line equipment from the harm of instantaneous overvoltage. However, the arc ignited in the gap sometimes cannot be exting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/06H02H9/08
CPCH02H9/06H02H9/08
Inventor 齐静静王金鹏李家宁高恒马驰骋
Owner CHINA PETROLEUM & CHEM CORP
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