Integrated protection system based on multiple traditional protection technologies

A technology of protection system and technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem of only protecting a single-segment line

Inactive Publication Date: 2007-05-09
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, these protections are currently installed based on independent electrical equipment. Although

Method used

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  • Integrated protection system based on multiple traditional protection technologies
  • Integrated protection system based on multiple traditional protection technologies
  • Integrated protection system based on multiple traditional protection technologies

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[0012] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0013] As shown in Figure 1, when a fault occurs at F1 on line 2, IR relays, such as IR1, IR2, and IR3 in the system, will all detect the fault. In this case, IR1 will not respond to the fault immediately because it exceeds the operating range of IR1's instantaneous action; for IR2, if the magnitude of the fault current exceeds the setting value of its instantaneous segment current, IR2 will instantaneously trip , Otherwise enter the second stage; after IR2 trips the fault line, the fault will be removed and IR1 will return to continue normal operation.

[0014] At the same time, when the communication channel is available, IR2 will send fault direction information to the integrated protection relays and INP units connected to it. When the communication channel between IR2 and IR3 meets the requirements, IR3 will compare the local fault information through anal...

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Abstract

Being installed on bus of transformer substation, dedicated integrated protection relay (IR) is connected to current transformer and voltage transformer on all outgoing wires of bus. Combining with new development in traditional protection and protection of power distribution, IR makes up of new protection including three phases: first phase is instantaneous trip unit; second phase is acceleration trip unit implemented by using directional comparison technique of communication channel or technique of non channel; in third phase, based on collected information of fault and direction sent from IR through network, integrated network protection unit sends out corresponding trip command directly. The invention provides quick protection for single sect of wire, as well as integrated protection function for whole system of power distribution. The invention possesses wide foreground of application along with development of measurement, communication, and process etc. techniques.

Description

technical field [0001] The invention relates to a power system, and more specifically relates to an integrated protection system based on various traditional protection technologies, which belongs to the technical field of relay protection. Background technique [0002] With the continuous development of digital technology, detection technology and network communication technology, in the field of power system relay protection technology, centralized protection systems have attracted more and more attention. For power transmission lines, transformers and generators, in order to achieve a certain degree of centralization, multiple protection functions have been integrated into one protection device. For example, microcomputer line protection can integrate protection with different functions such as distance or current as the main protection, and can also integrate directional protection and overcurrent protection as backup protection. However, these protections are currently...

Claims

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Application Information

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IPC IPC(8): H02H7/22H02H7/26
Inventor 和敬涵薄志谦任颖莉安德鲁.克莱门克
Owner BEIJING JIAOTONG UNIV
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