Quick protection method applicable to intelligent distribution network

A smart distribution network, fast technology, applied in the direction of automatically disconnected emergency protection devices, emergency protection circuit devices, electrical components, etc., can solve the problem of long protection time, failure to meet the fast protection requirements of smart distribution network, and insufficient utilization The advantages of the high power supply capacity grid structure of the intelligent distribution network, etc., achieve the effect of fast fault location and improvement of power supply reliability

Active Publication Date: 2015-06-10
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the protection time is long, which cannot meet the fast protection requirements of the smart distribution network, and does not make full use of the advantages of the high power supply capacity grid of the smart distribution network

Method used

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  • Quick protection method applicable to intelligent distribution network
  • Quick protection method applicable to intelligent distribution network
  • Quick protection method applicable to intelligent distribution network

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the drawings and embodiments.

[0031] The fast protection method suitable for the intelligent distribution network proposed by the present invention is realized through the following technical solutions, and the steps include:

[0032] Fig. 1(a), Fig. 1(b), and Fig. 1(c) show the program flow chart of the rapid protection method of the distribution network of the present invention. The protection method realizes fault location, fault isolation and fault recovery of the distribution network line by controlling the opening and closing of the sectional switch and the tie switch. The present invention mainly includes three interrupt service subroutines: a fault handling interrupt service subroutine, a jump command interrupt service subroutine and a downstream protection request interrupt service subroutine. The program flow is briefly described as follows:

[0033] The fault handling interrupt service sub...

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Abstract

The invention discloses a quick protection method applicable to an intelligent distribution network. The method is that a current break variable starting element is utilized to start protection; adjacent protection devices exchange information; the protection is started from the downstream of a distribution circuit in which fault current is detected, and a circuit breaker at each protecting part is sequentially tripped off until reaching the upstream of the circuit, so that whether the fault current occurs in can be determined through adjacent protection devices before tripping off the circuit breaker to achieve fault positioning and fault isolation; meanwhile, an interconnection switch of each circuit is utilized to quickly recover from fault. With the adoption of the method, the quick fault positioning, fault isolation and recovery from fault of the distribution circuit can be achieved; the fault time is reduced; the power restoration of a non-fault power-off area is sped up; therefore, the power supply reliability is improved; the conflict between a distributed power supply and quick protection of the distribution network can be solved; in addition, the advantage of the network structure with high power supply capacity of the intelligent distribution network can be brought into full play, and the intelligent distribution network can be adapted well.

Description

Technical field [0001] The invention relates to the field of relay protection of power system distribution lines, in particular to the protection of intelligent distribution network lines containing distributed power sources, and in particular to a rapid protection method suitable for intelligent distribution networks. Background technique [0002] At present, with the continuous advancement of smart grids and the continuous improvement of people's living standards, the requirements for power supply reliability are getting higher and higher. The distribution network is directly oriented to users and has a complex structure with a high failure rate. After the distribution network fails, it is required to quickly realize fault location, fault isolation and fault recovery. High power supply capacity grid structure and a large number of distributed power access are the main characteristics of intelligent distribution network. The high power supply capacity grid structure lays the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02H3/06H02J9/06
Inventor 牛进苍李红梅高厚磊赵宝光李尚振亓延峰李岩亓占华许丹裴秀高王晓军朱孟轩
Owner STATE GRID CORP OF CHINA
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