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Double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method

A technology for isolating switches and mechanical defects, which is applied in the direction of electric switches, computer components, character and pattern recognition, etc., can solve problems such as poor contact of contacts, decrease in reliability and service life of switchgear, and defects in isolating switches. Improve diagnostic efficiency and accuracy, good application prospects, and facilitate industrial implementation

Pending Publication Date: 2020-10-27
WUHAN HONGMEN ELECTRICAL TECH CO LTD
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Problems solved by technology

This method is not easy to detect early general defects, which will lead to the operation of the disconnector with defects. Typical defects such as three-phase out-of-phase, contact angle deviation, and stroke overrun can lead to poor contact, contact fatigue, and overheating of contacts. and other problems, which reduce the reliability and service life of the switchgear

Method used

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  • Double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method
  • Double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method
  • Double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method

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Embodiment Construction

[0033] The invention will be described in detail below in conjunction with specific embodiments.

[0034] The method for diagnosing the mechanical defect of the double-column horizontal opening type isolating switch in this application is based on the closing stroke curve, such as figure 1 As shown, the closing stroke curve is set in the cross coordinate system, where the abscissa coefficient is the rotation angle (°) of the operating rod during the closing process; the ordinate coefficient is the closing torque (N.m) during the closing process;

[0035] First, construct the closing travel curve according to the double-column horizontal opening type isolating switch in normal operation, and obtain the corresponding data of the normal travel curve;

[0036] Sections are divided according to the changing trend of closing torque, including:

[0037] The smooth interval segment x∈[α 0 , α 1 ];

[0038] The small peak section x∈[α 1 , α 2 ];

[0039] The large peak section x...

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Abstract

The invention belongs to the technical field of power equipment defect detection methods, and particularly relates to a double-column horizontal opening type disconnecting switch closing machinery defect diagnosis method. The method comprises the following steps: firstly, constructing a closing travel curve according to a normally-operated double-column horizontal open type isolation switch to obtain corresponding data of the normal travel curve; and drawing an actual measurement closing stroke curve in the closing process of the to-be-measured double-column horizontal opening type isolation switch. Fault identification and detection are carried out according to the difference between an actual measurement curve and a normal curve; according to the invention, rapid and effective determination of various mechanical defects of the double-column horizontal opening type isolation switch is realized by using a digital quantification method; the improvement of the diagnosis efficiency and accuracy of the mechanical defects of the isolation switch is facilitated; operation reliability of the isolation switch is improved, a design basis is provided for realization of digital intelligent monitoring, automatic monitoring and alarm can be conveniently realized through utilizing equipment such as a sensor based on the method and the criterion rule, industrial implementation is facilitated,and the method has good application prospects.

Description

technical field [0001] The application belongs to the technical field of defect detection methods for electric equipment, and in particular relates to a method for diagnosing mechanical defects of a double-column horizontal opening type isolating switch. Background technique [0002] High-voltage isolating switch is the largest number of switching devices in power plants and substations. It has various structural forms such as horizontal and vertical, and has the functions of isolating power supply, switching operation, connecting and cutting off small current circuits, etc. During the installation and operation of the isolating switch, affected by the installation and commissioning experience and the harsh environment (rain, ice, sand), there may be bearing jams, operating rod jams, contact corrosion, insufficient clamping force, and three-phase Potential defects such as out-of-phase, spring failure, and insufficient stroke are difficult to detect in time through manual ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H11/00G06K9/62
CPCH01H11/0062G06F18/22
Inventor 阮江军王波勇
Owner WUHAN HONGMEN ELECTRICAL TECH CO LTD
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