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Arrester overvoltage protection device with variable voltage ratio and implementation method

A technology of overvoltage protection device and arrester, which is applied in the field of power electronics, can solve the problems of residual voltage increase, influence, and increase of continuous operating voltage, etc., and achieve the effect of reducing voltage ratio, good application prospects, and taking into account economy and practicability

Active Publication Date: 2015-05-13
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use a surge arrester with a higher rated voltage for overvoltage protection. While increasing the continuous operating voltage, the residual voltage will also increase accordingly, which may affect the equipment to be protected.

Method used

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  • Arrester overvoltage protection device with variable voltage ratio and implementation method
  • Arrester overvoltage protection device with variable voltage ratio and implementation method

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0030] Such as figure 1 , a lightning arrester overvoltage protection device with variable pressure ratio, said device includes a series arrester group, a thyristor system and a fault detection system; said thyristor system is connected in parallel with the arrester in the arrester series group, and said fault detection system is connected with the arrester in series The arresters are connected in series and in parallel.

[0031] The thyristor system includes at least one anti-parallel thyristor and its trigger circuit, and the trigger circuit is connected in parallel with the fault detection system.

[0032] The arrester series group is composed of two or more arresters connected in series in sequence, one arrester is connected in parallel with an anti-parallel thyristor, and the arrester series group is connected in parallel with the protected equipment. ...

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Abstract

The invention provides an arrester overvoltage protection device with a variable voltage ratio and an implementation method, belonging to the technical field of power electronics. The device comprises an arrester serial connection group, a thyristor system and a fault detection system; the thyristor system is connected in parallel with an arrester in the arrester serial connection group; and the fault detection system is connected in parallel with the arrester serial connection group. The arrester overvoltage protection device with the variable voltage ratio has a relatively small number of used parts, a simple structure and a small floor area. In addition, as the power electronic devices used by the device are low in cost, the arrester overvoltage protection device with the variable voltage ratio lowers comprehensive manufacturing cost of a whole set of device, gives a consideration to economical efficiency and practical applicability, and has relatively good application foreground.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to an overvoltage protection device and a realization method of an arrester with variable voltage ratio. Background technique [0002] Overvoltage refers to an instantaneous or prolonged voltage increase that is higher than the rated allowable voltage of the grid and may cause damage to electrical devices due to internal faults, switch operations or lightning strikes. Limiting the overvoltage of the transmission system is of great significance to reduce the project cost and ensure the safe and stable operation of the system. In the power system line, it is necessary to limit the power frequency transient overvoltage, various types of operating overvoltage (including line and substation closing overvoltage, line single-phase reclosing overvoltage, line grounding fault occurrence and elimination of overvoltage and solution. Overvoltage), system lightning protect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/20
Inventor 王轩王浩淼吴倩喻劲松刘慧文张宇
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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