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A protection system of integration boundary of main electricity transmission line

A technology for transmission line and boundary protection, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of reducing the reliability and tripping speed of the scheme, increasing the cost and complexity of the protection scheme, and achieving the effect of simple structure and easy implementation.

Inactive Publication Date: 2007-11-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation of these principles requires a channel, which not only increases the cost and complexity of the protection scheme, but also reduces the reliability and tripping speed of the scheme

Method used

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  • A protection system of integration boundary of main electricity transmission line
  • A protection system of integration boundary of main electricity transmission line
  • A protection system of integration boundary of main electricity transmission line

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Embodiment Construction

[0019] The main transmission line integrated boundary protection system of the present invention includes three parts: an interface unit, an optical fiber network, and a centralized integrated protection relay unit, wherein:

[0020] The interface unit (IU), which is a control and measurement unit, is connected to the equipment through various sensors, such as traditional CT, VT, optical combination sensor, and electronic combination sensor. The measured analog and digital signals are converted into optical form and sent to the central relay protection unit through the redundant optical fiber network, and the interface unit (IU) also receives and executes the control signal sent by the relay through the control loop.

[0021] Optical fiber network, the communication of this optical fiber network is not only connected with key equipment interfaces and relays, it is also connected with many other devices such as communication gateways, man-machine interfaces and GPS clocks. The ...

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Abstract

The invention discloses an integrated boundary protecting system of main transmitting circuit, which comprises the following parts: interface communicating unit, communicating fiber-optical network, central relay protective unit and multiple breaker, wherein the interface communicating unit contains multiple measuring and executing units and communicating fiber-optical network part to connect these units; the measuring and executing unit contains current transformer, interface unit, communicating Ethernet and network switch; the current transformer connects the protected transmitting wire; the input end of interface unit connects three-phased current output end of current transformer; the output end of interface unit connects the breaker; the communicating end of interface unit connects the communicating fiber-optical network through network switch; multiple relays connect the communicating fiber-optical network through network switch. The invention can protect high-voltage transmitting wire, which needn' t communicating channel with simple structure.

Description

technical field [0001] The invention belongs to the field of power systems, and relates to a protection device for a power system, in particular to an integrated boundary protection system for main transmission lines. Background technique [0002] In the late 1960s, Rockefeller proposed a centralized substation protection system based on a centralized computer system. This idea fits nicely with the concept of fully integrated protection, where protection not only monitors a single plant but also monitors an area of ​​the network. Since computer hardware and software and communication technology cannot support this idea, it has not been put into practice yet. Since then, power system relay protection technology based on digital technology has been greatly developed. The introduction of microprocessors in protection in the 1980s mostly followed the usual steps of adopting a distributed processing platform that was primarily used to protect individual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 张保会薄自谦安德鲁·克莱门克李朋
Owner XI AN JIAOTONG UNIV