CN101477158A - Recognition device and method for abnormal heating defect rank of electric power apparatus - Google Patents

Abstract

The invention discloses an identification device and an identification method for abnormal heating defect class of power equipment. The identification device is formed by orderly connecting an infrared thermometer, a temperature difference calculator, a PC, and an LED display screen in series, wherein the infrared thermometer is used for measuring temperature, the temperature difference calculator is used for calculating a value of relative temperature difference, the PC is used for calculating and identifying the defect class of abnormal heating equipment, and the LED display screen is used for outputting a result of the identification. The identification method utilizes the infrared thermometer to measure three temperature values, namely the heating point temperature T1 of the power equipment, the temperature T2 of a non-fault phase and the temperature T0 of an environmental reference body, calculates the relative temperature difference delta through the temperature difference calculator, then utilizes the PC to identify different defect classes according to different power equipment, and displays the result of the identification through the LED display screen. The identification device and the identification method can reliably and conveniently judge the defect property of the heating equipment, arrange the overhaul in time, and avoid the further enlargement of fault.

Description

A kind of recognition device of abnormal heating defect rank of electric power and recognition methods

Technical field

The present invention relates to a kind of recognition device and recognition methods of abnormal heating defect rank of electric power, belong to the power equipment detection range.

Background technology

Power equipment is usually operated at high voltage and current state, and some equipment deficiencies can cause the abnormal temperature of part of appliance to raise.For example, there are a large amount of conductor crimping connections and socket connection in the power equipment,, then cause contact resistance to increase, under the big function of current, temperature anomaly occurring and raising if crimping or grafting are not tight.The rising of temperature makes contact resistance further increase, and causes vicious cycle, finally may cause the equipment cisco unity malfunction, even burn.The temperature of real-time detection power equipment, and in time the temperature of being surveyed is carried out defect analysis, significant for the safe and reliable operation that guarantees power equipment.

At present, detect the abnormal heating situation of power equipment in the electric substation usually with the infrared measurement of temperature instrument, but record a certain position of power equipment temperature when higher when infrared temperature measuring device, can't directly judge the grade of power equipment defective.

Summary of the invention

The purpose of this invention is to provide a kind of recognition device and recognition methods of abnormal heating defect rank of electric power, when using that the surface temperature field of infrared measurement of temperature instrument to charging equipment detects and when diagnosing, according to measured data, can accurately declare defective and the abnormal conditions of knowing equipment, guarantee the safe operation of power equipment.

The present invention is achieved through the following technical solutions the foregoing invention purpose:

A kind of recognition device of abnormal heating defect rank of electric power, this recognition device is composed in series successively by infrared thermometer, temperature difference counter, PC, LED display, infrared thermometer is used for thermometric, temperature difference counter is used to calculate the value of relative temperature difference, PC is used to calculate and discern the defect rank of abnormal heating equipment, and LED display is used to export the result of identification.

A kind of recognition methods based on abnormal heating defect rank of electric power of the present invention comprises the steps:

A, utilize infrared thermometer to record the temperature T 2 of the non-fault phase of temperature T 1, power equipment of power equipment abnormal heating point and environment with reference to three temperature values of body temperature degree T0; These three temperature values are calculated relative temperature difference δ through temperature difference counter,

$\mathrm{\&delta;}=\frac{T1-T2}{T1-\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="A200910024733E00081.png"\; state="\{\{state\}\}">T</figure-callout>}0}\&times;100\%;$

B, temperature difference counter send to PC with the relative temperature difference δ that the A step calculates,

(1) when δ 〉=95%, PC is " a urgent defective " by the LED display display message;

(2) when 80%≤δ＜95%, PC is " significant deficiency " by the LED display display message;

(3) when δ＜80%, PC carries out the secondary identifying operation again, then the result is sent to the LED display display message and is " general defective " or " zero defect ".

When δ＜80%, PC carries out the recognition methods of secondary identifying operation again and determines according to the following step among the above-mentioned steps B:

When I, PC are discerned this power equipment and be SF6 isolating switch, vacuum circuit breaker, oil filled bushing, judge whether 20%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message;

When II, PC are discerned this power equipment and be air-break, judge whether 50%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message;

When III, PC are discerned this power equipment and be high-tension switch cabinet, disconnector or other diversing flow system, judge whether 35%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message.

Beneficial effect

The present invention with reference to three temperature values of body temperature degree T0, can reliably judge the defect property of heat-producing device according to the temperature T 2 of charging equipment heat generating spot temperature T 1, non-fault phase and environment easily, in time arranges maintenance, avoids the further expansion of fault.The present invention is applicable to the power equipment that has electric current, voltage thermal effect or other thermal effects in the electric system.The present invention is practical, and is easy to use, quick, reliable, can accurately judge the defect rank of heating power equipment.

Description of drawings

Fig. 1: recognition device structural drawing of the present invention

Fig. 2: recognition methods process flow diagram of the present invention.

Embodiment

A kind of recognition device of abnormal heating defect rank of electric power, this recognition device is composed in series successively by infrared thermometer, temperature difference counter, PC, LED display, infrared thermometer is used for thermometric, temperature difference counter is used to calculate the value of relative temperature difference, PC is used to calculate and discern the defect rank of abnormal heating equipment, and LED display is used to export the result of identification.

Embodiment 1:

The temperature that adopts infrared thermometer to record certain transformer station's oil filled bushing equipment phase is T1=100 ℃, and the temperature of normal phase is T2=30 ℃, and environment at that time is T0=25 ℃ with reference to the body temperature degree.These three temperature values that infrared thermometer will record are transferred to temperature difference counter, and temperature difference counter is according to formula $\mathrm{\&delta;}=\frac{T1-T2}{T1-\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="A200910024733E00081.png"\; state="\{\{state\}\}">T</figure-callout>}0}\&times;100\%$ Try to achieve relative temperature difference δ=93.3%, temperature difference counter sends to PC with the value of relative temperature difference δ, and PC is judged 80%≤δ＜95%, and PC is " significant deficiency " by the LED display display message.

Embodiment 2:

The temperature of utilizing infrared thermometer to record certain transformer station's air-break equipment phase is T1=120 ℃, and the temperature of normal phase is T2=30 ℃, and environment at that time is T0=28 ℃ with reference to the body temperature degree.These three temperature values that infrared thermometer will record are transferred to temperature difference counter, and temperature difference counter is according to formula $\mathrm{\&delta;}=\frac{T1-T2}{T1-\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="A200910024733E00081.png"\; state="\{\{state\}\}">T</figure-callout>}0}\&times;100\%$ Try to achieve relative temperature difference δ=97.8%, temperature difference counter sends to PC with the value of relative temperature difference δ, and PC is judged δ 〉=95%, and PC is " a urgent defective " by the LED display display message.

Embodiment 3:

The temperature of utilizing infrared thermometer to record certain SF6 of transformer station breaker apparatus phase is T1=90 ℃, and the temperature of normal phase is T2=40 ℃, and environment at that time is T0=25 ℃ with reference to the body temperature degree.These three temperature values that infrared thermometer will record are transferred to temperature difference counter, and temperature difference counter is according to formula $\mathrm{\&delta;}=\frac{T1-T2}{T1-\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="A200910024733E00081.png"\; state="\{\{state\}\}">T</figure-callout>}0}\&times;100\%$ Try to achieve relative temperature difference δ=76.9%, temperature difference counter sends to PC with the value of relative temperature difference δ, PC is judged δ＜80%, carry out the secondary identifying operation then, it is the SF6 isolating switch that PC identifies this equipment, and 20%≤δ＜80%, PC is " a general defective " by the LED display display message.

Embodiment 4:

The temperature of utilizing infrared thermometer to record certain transformer station's high-voltage switch gear cabinet equipment phase is T1=80 ℃, and the temperature of normal phase is T2=60 ℃, and environment at that time is T0=20 ℃ with reference to the body temperature degree.These three temperature values that infrared thermometer will record are transferred to temperature difference counter, and temperature difference counter is according to formula $\mathrm{\&delta;}=\frac{T1-T2}{T1-\mathrm{<figure-callout\; id="0"\; label="T"\; filenames="A200910024733E00081.png"\; state="\{\{state\}\}">T</figure-callout>}0}\&times;100\%$ Try to achieve relative temperature difference δ=33.3%, temperature difference counter sends to PC with the value of relative temperature difference δ, and PC is judged δ＜80%, carry out the secondary identifying operation then, it is high-tension switch cabinet that PC identifies this equipment, and δ＜35%, and PC is " zero defect " by the LED display display message.

Table 1 is the relative temperature difference criterion of part electric current pyrogenicity type equipment, is the standard standard with " People's Republic of China's power industry standard charging equipment infrared diagnosis technology is used guide rule DL/T664-1999 ".

The relative temperature difference criterion of table 1 part electric current pyrogenicity type equipment

Claims (3)

1, a kind of recognition device of abnormal heating defect rank of electric power, it is characterized in that this recognition device is composed in series successively by infrared thermometer, temperature difference counter, PC, LED display, infrared thermometer is used for thermometric, temperature difference counter is used to calculate the value of relative temperature difference, PC is used to calculate and discern the defect rank of abnormal heating equipment, and LED display is used to export the result of identification.

2, a kind of recognition methods of the abnormal heating defect rank of electric power based on claim 1 is characterized in that comprising the steps:

A, utilize infrared thermometer to record the temperature T 2 of the non-fault phase of temperature T 1, power equipment of power equipment abnormal heating point and environment with reference to three temperature values of body temperature degree T0; These three temperature values are calculated relative temperature difference δ through temperature difference counter,

$\mathrm{\&delta;}=\frac{T1-T2}{T1-T0}\&times;100\%;$

B, temperature difference counter send to PC with the relative temperature difference δ that the A step calculates,

(1) when δ 〉=95%, PC is " a urgent defective " by the LED display display message;

(2) when 80%≤δ＜95%, PC is " significant deficiency " by the LED display display message;

(3) when δ＜80%, PC carries out the secondary identifying operation again, then the result is sent to the LED display display message and is " general defective " or " zero defect ".

3, the recognition methods of abnormal heating defect rank of electric power according to claim 2 is characterized in that among the step B that PC carries out the recognition methods of secondary identifying operation again and determines according to the following step when δ＜80%:

When I, PC are discerned this power equipment and be SF6 isolating switch, vacuum circuit breaker, oil filled bushing, judge whether 20%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message;

When II, PC are discerned this power equipment and be air-break, judge whether 50%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message;

When III, PC are discerned this power equipment and be high-tension switch cabinet, disconnector or other diversing flow system, judge whether 35%≤δ＜80%, when the result for being that PC be " a generally defective " by the LED display display message; When the result denys that PC is " zero defect " by the LED display display message.

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