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Method and device for predicting temperature rise of contact points of electrical equipment

A technology of power equipment and contact points, which is applied in the field of power systems and can solve problems affecting the life of switch cabinets and other issues

Active Publication Date: 2021-09-24
SIEMENS POWER AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the temperature rise gradually stabilizes after a long period of time, if the contact point is detected to be faulty after the temperature rise is stable, the switchgear has been working for a period of time, which will affect the life of the switchgear

Method used

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  • Method and device for predicting temperature rise of contact points of electrical equipment
  • Method and device for predicting temperature rise of contact points of electrical equipment
  • Method and device for predicting temperature rise of contact points of electrical equipment

Examples

Experimental program
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Embodiment 1

[0056] This embodiment provides a method for predicting the temperature rise of the contact point of the switch cabinet, and the execution subject is a device for predicting the temperature rise of the contact point of the switch cabinet. 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.

[0057] Such as figure 1 As shown, is a schematic flow chart of the method for predicting the temperature rise of the contact point of the switchgear according to this embodiment. The method includes:

[0058] Step 101 , acquiring a first temperature rise of a contact point of a switch cabinet at the beginning of an initial sampling period and a second temperature rise at the end of an initial sampling period, the contact point being a contact position of at least two components of the switch cabinet.

[0059] The initial sampling period refers to the sampling period corresponding to the first te...

Embodiment 2

[0073] This embodiment provides a further supplementary description of the method for predicting the temperature rise of the contact point of the switchgear in the first embodiment. Such as figure 2 As shown, is a schematic flow chart of the method for predicting the temperature rise of the contact point of the switchgear according to this embodiment. The method includes:

[0074] Step 201 , acquiring a first temperature rise of a contact point of a switch cabinet at the beginning of an initial sampling period and a second temperature rise at the end of an initial sampling period, the contact point being a contact position of at least two components of the switch cabinet.

[0075] This step is consistent with step 101 and will not be repeated here.

[0076] Step 202, obtaining a time constant of a first-order inertial system of a switch cabinet.

[0077] This step is consistent with step 102 and will not be repeated here.

[0078] Step 203, according to the first temperat...

Embodiment 3

[0091] This embodiment provides a device for predicting the temperature rise of the contact point of the switchgear, which is used to implement the method for predicting the temperature rise of the contact point of the switchgear in the first embodiment.

[0092] Such as image 3Shown is a schematic structural diagram of the device for predicting the temperature rise of the contact point of the switchgear according to this embodiment. The device includes a first acquisition unit 301 , a second acquisition unit 302 and a prediction unit 303 .

[0093] Wherein, the first acquisition unit 301 is used to acquire the first temperature rise of a contact point of the switch cabinet at the beginning of an initial sampling period and the second temperature rise at the end, the contact point being the contact position of at least two components of the switch cabinet ; The first determination unit 302 is used to obtain the time constant of the first-order inertial system of a switch cab...

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PUM

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Abstract

The present invention relates to a method and device for predicting the temperature rise of a contact point of electric equipment. The method includes: obtaining the first temperature rise of a contact point of electric equipment at the beginning of an initial sampling period and the second temperature rise at the end, the contact point is the contact position of at least two parts of the electric device; obtain the time constant of the first-order inertial system of an electric device; predict the contact point at the end of the Xth sampling period according to the first temperature rise, the second temperature rise and the time constant The third temperature rise, X=[LN], where L is a positive integer and L≥3, s is a sampling period, N*s=time constant. According to the present invention, by obtaining the temperature rise at the beginning and end of a sampling period, the temperature rise after the preset time period is predicted, so that the temperature rise after the preset time period can be quickly determined, such as the value after the temperature rise stabilizes , and then perform some subsequent operations based on the predicted temperature rise, such as judging whether the contact point is faulty.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a method and a device for predicting the temperature rise of contact points 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/06G06F17/18G01K13/00H02B1/24
Inventor 付俊华王浩官建涛赵吉生师康
Owner SIEMENS POWER AUTOMATION