Protector for complex voltage operating circuit at high and low pressure sides

A compound voltage and loop protection technology, applied in emergency protection circuit devices, electrical components, etc., can solve problems such as the impact on the national economy and people's lives, power grid collapse, equipment damage, etc., to achieve good social benefits, prevent recurrence, and improve reliability. sexual effect

Inactive Publication Date: 2011-04-13
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the relay protection device does not work normally, or when there is an error, it will directly lead to equipment damage, the expansion of the situation, and even the collapse of the power grid, which will seriously affect the national economy and people's lives.

Method used

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  • Protector for complex voltage operating circuit at high and low pressure sides
  • Protector for complex voltage operating circuit at high and low pressure sides

Examples

Experimental program
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Embodiment Construction

[0009] Such as figure 1 Shown: a protection device for the compound voltage action circuit on the medium and low voltage side, including a relay and a transformer. The relay is set in the compound voltage action circuit on the medium and low voltage side. The logic condition increases the delay extension of 5-10S.

[0010] Since the present invention carries out technical transformation on the transformer protection and replaces the relay, the composite voltage blocking overcurrent protection on the medium voltage side can reliably operate, and the logic condition when the composite voltage action circuit protection device on the medium and low voltage side is started increases the delay of 5-10S widen as figure 1 , to ensure the reliable operation of the high backup protection; and re-check the sensitivity of the high backup protection when the main transformer protection is short-circuited on the medium and low voltage sides.

[0011] Utilizing the present invention, when ...

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Abstract

The invention discloses a protector for complex voltage operating circuit at high and low pressure sides, comprising a relay, wherein the relay is arranged in the complex voltage operating circuit at the high and low pressure sides. In the invention, the protection on a transformer is subject to technical transformation and the relay is changed, so that the reliable operation of complex voltage locking overcurrent protection at the high and low pressure sides is ensured; logical condition is subject to 5-10 seconds time relay broadening when the protector of the complex voltage operating circuit at the high and low pressure sides starts, thereby ensuring the reliable operation of the high back-up protection; and sensitivity of the high back-up protection of the main transformer protection is verified again when the high and low pressure sides short out.

Description

technical field [0001] The invention belongs to the technical field of relay protection devices, and in particular relates to a compound voltage action circuit protection device for medium and low voltage sides. Background technique [0002] Relay protection is an important part of the power system, known as the safety barrier of the power grid, and at the same time it is the root cause that may cause accidents to expand. Its performance directly affects the safe operation of the power grid. When the relay protection device does not work normally, or when there is an error, it will directly lead to equipment damage, expansion of the situation, and even the collapse of the power grid, which will seriously affect the national economy and people's lives. Contents of the invention [0003] The purpose of the present invention is to avoid the disadvantages of the above-mentioned prior art, and provide a compound voltage on the medium and low voltage sides that can effectively i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/04
Inventor 翟君毅杜世民冯政协段利伟曹玲玲梁冰宋玉吴磊李喜云
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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