Electric network fault self-adapting diagnostic method based on element correlation analysis

A power grid fault and diagnosis method technology, applied in the direction of fault location, information technology support system, etc., can solve problems such as inability to adapt to power grid topology changes, difficulty in correctly identifying multiple faults, etc., and achieve fast execution speed and good fault tolerance

Inactive Publication Date: 2009-09-16
JIANGSU ELECTRIC POWER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional fault identification methods for stability control devices generally judge faulty components and fault types based on protection actions and circuit breaker tripping information. Fault criteria are usually set in advance and cannot adapt to changes in the topology of the power grid. After changes in power grid wiring, manual corrections are required
And the traditional stability control device is difficult to correctly identify complex multiple faults

Method used

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  • Electric network fault self-adapting diagnostic method based on element correlation analysis
  • Electric network fault self-adapting diagnostic method based on element correlation analysis

Examples

Experimental program
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Effect test

Embodiment

[0013] Example: Adaptive Fault Discrimination of Jiangsu Subei Stability Control System

[0014] The system consists of a three-tier structure consisting of a main station, a substation, and an execution (cutting machine) station. The power grid fault self-adaptive diagnosis method based on component correlation analysis of the present invention is adopted in the system device fault criterion.

[0015] Generate an overloaded line associated line fault table online at the system master station:

[0016] Preface

[0017] The blanks in the table are the online calculation and refresh data of the fault correlation function F(i). When the master station detects that an overload event occurs, the control method is determined by querying the correlation degree in the above table.

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PUM

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Abstract

A method for self-adapting diagnosing the failure of electric network based on the correction analysis of element is characterized in that each power-off element in the power-off area is defined with a failure index function which represents the supporting degree of the output quantity facing to other power-off elements to the failure of the element. The failure element and failure type are recognized according to the value of the failure index function. The method according to the invention can correctly recognize the multiple failure of a large-scale electric power system according to the common actions of switches and protections. A stronger fault-tolerant property is provided. The execution speed is fast in order to stabilize the system real-time. The multiple malfunctions in a same tipping area can be executed with diagnosis. The method according to the invention is suitable for the failure discriminating of the control system of the large-scale electric power system.

Description

technical field [0001] The invention belongs to the field of power grid control. More precisely, the invention relates to an adaptive diagnosis method for multiple faults in a power grid based on component correlation analysis, which is suitable for fault diagnosis of large-scale power systems and can be used as a fault criterion method for a stable control system . Background technique [0002] When some serious faults occur in the power system that the dispatcher cannot respond to, the stability control device is required to quickly and accurately determine the fault location, and take effective measures to restore the normal operation of the system as soon as possible. Traditional fault identification methods for stability control devices generally judge faulty components and fault types based on protection actions and circuit breaker tripping information. Fault criteria are usually set in advance and cannot adapt to changes in the topology of the power grid. After change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 李海峰方勇杰朱寰杨卫东刘盛松李碧君王小英
Owner JIANGSU ELECTRIC POWER CO
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