Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and device for fault detection of electrical equipment

A power equipment and fault detection technology, applied in the field of power systems, can solve problems such as loose deformation, oxidation of contact points, and damage to switch cabinets

Active Publication Date: 2022-02-25
SIEMENS POWER AUTOMATION
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to factors such as manufacturing, installation, transportation or long-term operation, the contact point may have problems such as contact oxidation, deformation and looseness. When these problems occur, the temperature rise of the contact point will exceed the specified range, resulting in damage to the switchgear

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for fault detection of electrical equipment
  • Method and device for fault detection of electrical equipment
  • Method and device for fault detection of electrical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] This embodiment provides a method for detecting a fault of a switchgear, and the execution body is a device for predicting a temperature rise of a contact point of the switchgear. The device can be integrated in a temperature measuring sensor, a computer or a relay, or can be set separately, which will not be repeated here.

[0061] Such as figure 1 As shown, it is a schematic flowchart of a method for detecting a switch cabinet fault according to this embodiment. The method includes:

[0062] Step 101, acquire the real-time temperature rises of each phase corresponding to each contact point of a switchgear, and use the corresponding real-time temperature rises as a judging temperature rise group.

[0063] The real-time temperature rise in this step can be obtained through a temperature sensor arranged near the contact point. The contact point of the switchgear is the contact position of at least two components, such as the contact position between the moving contact...

Embodiment 2

[0076] This embodiment makes a further supplementary description of the method for detecting the fault of the switchgear in the first embodiment. In this embodiment, in addition to vertically comparing the real-time temperature rises of the contact points on the same phase, it is also possible to predict the stable temperature rise of each contact point and judge whether the contact point is faulty based on the stable temperature rise. That is, if it is determined according to the first target temperature rise and the reference temperature rise that the contact point corresponding to the first target temperature rise is faulty or the corresponding contact point is judged to be faulty according to the stable temperature rise, it can indicate that the contact point is indeed faulty, An alarm can then be issued.

[0077] Such as figure 2 As shown, it is a schematic flowchart of a method for detecting a switch cabinet fault according to this embodiment.

[0078] Step 201 , acqu...

Embodiment 3

[0094] This embodiment makes further supplementary descriptions of the method for detecting the fault of the switchgear in the first embodiment. The method includes:

[0095] Step G1, obtaining the first temperature rise of a contact point of a switch cabinet at the beginning and the second temperature rise at the end of an initial sampling period, the contact point being the contact position of at least two components of the switch cabinet.

[0096] This step is consistent with step 201 and will not be repeated here.

[0097] Step G2, obtaining the time constant of the first-order inertial system of a switchgear.

[0098] This step is consistent with step 202 and will not be repeated here.

[0099] Step G3, according to the first temperature rise, the second temperature rise and the time constant, predict the third temperature rise of the contact point at the end of the Xth sampling period, X=[L times the time constant / a sampling period], where L is Positive integer and L≥...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention relates to a method and device for fault detection of electric equipment. The method includes: obtaining the real-time temperature rises of each phase corresponding to each contact point of an electric equipment, and using each corresponding real-time temperature rise as a judgment temperature rise group; Select a first target temperature rise in a judging temperature rise group, and use the remaining temperature rises as reference temperature rises; determine a reference temperature rise according to each of the reference temperature rises; according to the first target temperature rise and the reference temperature rise, Determining whether the contact point corresponding to the first target temperature rise fails. By vertically comparing the real-time temperature rise of multiple contact points on the same phase to determine whether there is a contact point failure, this method has a simple algorithm, is convenient and quick.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method for fault detection of power equipment. Background technique [0002] The switchgear is an important power transmission and distribution device in the power system, so it is necessary to monitor the operation of the switchgear in real time. Switchgear usually has various contact points, such as the position where the plum blossom contact contacts the static contact, the position where the copper bar connects to external equipment, etc. When the current flows through the contact point, the contact point will heat up, so the national standard specifies the contact point The maximum allowable heating temperature and the maximum allowable temperature rise of the point. Due to factors such as manufacturing, installation, transportation or long-term operation, the contact point may have problems such as contact oxidation, deformation and looseness. When these problems occur, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 付俊华王浩官建涛师康左小明周寻
Owner SIEMENS POWER AUTOMATION