Distance protection optimization method and device for high-voltage line protection device

A protection device and distance protection technology, which is applied to emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., can solve problems such as power failure of protection devices, non-starting of distance protection, poor equipment cost and economic benefits, etc. , to achieve the effect of improving reliability and quick action and shortening action time

Pending Publication Date: 2022-01-21
NR ELECTRIC CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After the protection device loses power, according to the existing method, the distance protection may not start or the action response is slow, which will cause the fault range to expand and threaten the safety of network operation.
[0003] For the problem of power failure of the protection device, the traditional fixed value coordination method cannot solve the requirements of complete coordination and rapid fault removal
An alternative solution is to stop the primary equipment for the power-off interval or substation, and adjust the distance protection setting value of the corresponding line protection for the primary equipment that cannot be stopped to achieve the optimization of backup protection, but this method may lead to The load of the power grid is transferred in a large area, and the reliability and quick action of the distance protection are affected when the fault occurs
Another solution is to establish wide-area or station-area protection, and improve the reliability and coordination of line protection by establishing a new information transmission channel, but the equipment cost and economic benefits of this method are poor

Method used

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  • Distance protection optimization method and device for high-voltage line protection device
  • Distance protection optimization method and device for high-voltage line protection device
  • Distance protection optimization method and device for high-voltage line protection device

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[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0034] The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of these ...

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Abstract

The invention relates to the field of power system relay protection, in particular to a distance protection method for a high-voltage line protection device. The protection device comprises an energy storage unit. The method comprises the following steps: receiving a power loss state signal sent by a protection device at an opposite end; judging whether the protection device is in a power-off state or not; and if the protection device is not in the power-losing state, optimizing distance protection of the protection device based on the power loss state signal.

Description

technical field [0001] The present application relates to the field of relay protection of electric power systems, in particular to a distance protection optimization method and device for high-voltage line protection devices. Background technique [0002] At present, with the construction of high-voltage and ultra-high voltage transmission lines, it is more and more difficult to set the perfect coordination of line distance protection. Usually, the system is controlled according to the setting principle of the distance protection, which will lead to a longer action time of the distance protection. For example, the action time of the end stage of the distance protection is generally more than 3s. However, when the line with weak connection is artificially selected to be mismatched, the action time and sensitivity cannot guarantee the adjacent line, and it is more dependent on the main protection of the line. If the line protection device loses power in the substation, the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/00
CPCH02H7/263H02H3/006
Inventor 王玉龙赵青春谢华徐晓春郭涛王乐新戴光武邵通广谈浩李奔卜立之
Owner NR ELECTRIC CO LTD
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