CN104316222B - A kind of method for fast measuring of transformer thermometer ambient temperature effect amount - Google Patents
A kind of method for fast measuring of transformer thermometer ambient temperature effect amount Download PDFInfo
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- CN104316222B CN104316222B CN201410652905.7A CN201410652905A CN104316222B CN 104316222 B CN104316222 B CN 104316222B CN 201410652905 A CN201410652905 A CN 201410652905A CN 104316222 B CN104316222 B CN 104316222B
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Abstract
The present invention relates to a kind of method for fast measuring of transformer thermometer ambient temperature effect amount, tested in oil tank of transformer temperature stabilization, environment temperature T3, capillary pipe length L1, capillary one end connection thermometer；Length L is taken on the capillary2For heating region, temperature control device is wrapped up to heating region, it is T to read Current Temperatures meter pointer instruction temperature indicating value1And Moment is M1；Set and temperature control device is slowly warming up to target temperature T4；After temperature stabilization, it is T to read Current Temperatures meter pointer instruction temperature indicating value2And Moment is M2；Thermometer temperature indicating value difference and torque difference before and after heating up are calculated, according to the whole capillary institute amount influenced by ambient temperature of mathematic interpolation, thermometer produces temperature difference △ T=(T2‑T1)*L1/L2；Thermometer moment variations △ M=(M2‑M1)*L1/L2；Ambient temperature effect amount=△ T/ (T4‑T3) %/DEG C.Compared with prior art, the method for the present invention is simple and practicable, can execute-in-place, visual result is accurate.
Description
Technical field
The present invention relates to a kind of measuring method of ambient temperature effect amount, more particularly, to a kind of transformer thermometer environment
The method for fast measuring of temperature influence amount.
Background technology
Ambient temperature effect amount is to cause live transformer thermometer displays temperature when environment temperature is high to be more than actual temperature
Degree, when environment temperature is low, displays temperature is less than the direct factor of actual temperature, the ambient temperature effect amount of transformer thermometer
Measurement is also the key project of transformer thermometer routine inspection and type approval test.Simultaneously for transformer temperature oil surface temperature,
The measurement of hot spot temperature of winding, the ambient temperature effect amount of thermometer are directly related to the accurate measurement of temperature, influence indirectly
The regulation and control of transformer load and transformer safety operation.
The ambient temperature effect amount verification of transformer thermometer can only carry out in laboratory at present, to being already installed on scene
Thermometer also without fast and effectively method for fast measuring and device.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind is simple and practicable, can show
Field operation, the method for fast measuring of the accurate transformer thermometer ambient temperature effect amount of visual result.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of method for fast measuring of transformer thermometer ambient temperature effect amount, comprises the following steps：
(1) tested in oil tank of transformer temperature stabilization, environment temperature T3, scene is opened thermometer capillary and is walked
Slot cover plate, capillary pipe length L1, capillary one end connection thermometer；
(2) length L is taken on the capillary2For heating region, temperature control device is wrapped up to heating region, reads Current Temperatures meter
Pointer instruction temperature indicating value is T1And Moment is M1；
(3) temperature control device is set to target temperature value T4, and temperature control device is slowly warming up to target temperature T4；
(4) after temperature stabilization, it is T to read Current Temperatures meter pointer instruction temperature indicating value2And Moment is M2；
(5) thermometer temperature indicating value difference and torque difference before and after heating are calculated by the following formula, according to whole of mathematic interpolation
Capillary institute amount influenced by ambient temperature：
Thermometer produces temperature difference Δ T=(T2-T1)*L1/L2；
Thermometer moment variations Δ M=(M2-M1)*L1/L2；
Ambient temperature effect amount=Δ T/ (T4-T3) %/DEG C, according to obtained ambient temperature effect amount and standard require into
Row compares, and is adjusted or replaces to underproof.
In step (1) oil tank of transformer temperature stabilization refer to have a power failure 48 it is small when after, transformer tank temperature change during measurement
Less than 0.1 DEG C.
The temperature control device includes the sealing material of wrapping capillary, the heater heated to sealing material and sets
Determine and detect the temperature measurer of heter temperature.
Equipment is read by terminal and reads Current Temperatures meter pointer instruction temperature and Moment.
Compared with prior art, the present invention has the following advantages and beneficial effect：
1st, measuring method using the present invention can carry out ambient temperature effect amount to the thermometer for being installed on scene at any time
Measurement；
2nd, local ambient temperature change can be simulated, and obtains the ambient temperature effect amount changing value suffered by full table, and this
Invention needs equipment to be used simple and easy to get, easy to carry, it is only necessary to which that portable equipment can both carry out in-site measurement, and avoiding can only
Routine test is carried out in laboratory；
3rd, directly in capillary region simulated environment temperature change, avoid by weather, season, environment to the shadow of result of the test
Ring.
Brief description of the drawings
Fig. 1 is capillary when being measured using the method for the present invention and temperature control device arrangement schematic diagram.
Embodiment
When being tested, device layout drawing is as shown in Figure 1,1 one end of capillary connects thermometer 3, at one section of capillary 1
Upper wrapping has temperature control device 2.
A kind of method for fast measuring of transformer thermometer ambient temperature effect amount, comprises the following steps：
(1) tested in oil tank of transformer temperature stabilization, after oil tank of transformer temperature stabilization refers to when power failure 48 is small,
The change of transformer tank temperature is less than 0.1 DEG C during measurement, and environment temperature is T at this time3, thermometer capillary cabling channel is opened at scene
Cover board, capillary pipe length L1, capillary one end connection thermometer；
(2) length L is taken on the capillary2For heating region, temperature control device is wrapped up heating region, and temperature control device includes bag
The sealing material of capillary, the heater heated to sealing material and setting and the temperature measurer for detecting heter temperature are pricked,
It is T to read equipment to read Current Temperatures meter pointer instruction temperature indicating value by terminal1And Moment is M1；
(3) temperature control device is set to target temperature value T4, and temperature control device is slowly warming up to target temperature T4；
(4) after temperature stabilization, it is T to read Current Temperatures meter pointer instruction temperature indicating value2And Moment is M2；
(5) thermometer temperature indicating value difference and torque difference before and after heating are calculated by the following formula, according to whole of mathematic interpolation
Capillary institute amount influenced by ambient temperature：
Thermometer produces temperature difference Δ T=(T2-T1)*L1/L2；
Thermometer moment variations Δ M=(M2-M1)*L1/L2；
Ambient temperature effect amount=Δ T/ (T4-T3) %/DEG C, according to obtained ambient temperature effect amount and standard require into
Row compares, and is adjusted or replaces to underproof.
With reference to specific embodiment, the present invention is described in detail.
Embodiment 1
Specifically measurement process is：Thermometer capillary pipe length is 6 meters, 100 DEG C of thermometer measure scope, in environment temperature 25
Preparation is measured according to above-mentioned measuring method at DEG C, capillary heating region is 0.5m length, while reads thermometer indicating value
And moment values, it is 25.0 DEG C such as to read temperature, torque 0.43Nm；
Set temperature control device temperature and stablize and be warming up to 55 DEG C of setting value, thermometer indicating value and moment values are read after stablizing,
It is 25.2 DEG C such as to read temperature, torque 0.45Nm；
Calculate as follows：0.5 meter of length capillary temperature difference is 0.2 DEG C, torque difference 0.02Nm；Therefore 6 meters of capillaries
In 30 DEG C of temperature change, may cause to thermometer and produce temperature difference is 2.4 DEG C, moment variations 0.24Nm；Therefore, environment
Temperature influence amount for 0.08%/DEG C, more than standard requirement 0.05%/DEG C.As a result it is unqualified.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using invention.
Person skilled in the art obviously easily can make these embodiments various modifications, and described herein general
Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel disclose according to the present invention, do not depart from improvement that scope made and modification all should be the present invention's
Within protection domain.
Claims (2)
1. a kind of method for fast measuring of transformer thermometer ambient temperature effect amount, it is characterised in that comprise the following steps：
(1) tested in oil tank of transformer temperature stabilization, environment temperature T3, thermometer capillary cabling channel is opened at scene
Cover board, capillary pipe length L1, capillary one end connection thermometer；
(2) length L is taken on the capillary2For heating region, temperature control device is wrapped up to heating region, reads Current Temperatures meter pointer
Indicate that temperature indicating value is T1And capillary Moment is M1；
(3) temperature control device is set to target temperature value T4, and temperature control device is slowly warming up to target temperature T4；
(4) after temperature stabilization, it is T to read Current Temperatures meter pointer instruction temperature indicating value2And capillary Moment is M2；
(5) it is poor that thermometer temperature indicating value difference and capillary Moment before and after heating up are calculated by the following formula, according to difference meter
Calculate whole capillary institute amount influenced by ambient temperature：
Thermometer produces temperature difference △ T=(T2- T1)*L1/L2；
Thermometer moment variations △ M=(M2- M1)*L1/L2；
Ambient temperature effect amount=△ T/ (T4- T3) %；
The temperature control device includes the sealing material of wrapping capillary, and the heater heated to sealing material and setting are simultaneously
Detect the temperature measurer of heter temperature；Equipment is read by terminal to read suffered by Current Temperatures meter pointer instruction temperature and capillary
Torque.
2. a kind of method for fast measuring of transformer thermometer ambient temperature effect amount according to claim 1, its feature
Be, in step (1) oil tank of transformer temperature stabilization refer to have a power failure 48 it is small when after, during measurement the change of transformer tank temperature be less than
0.1℃。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652905.7A CN104316222B (en) | 2014-11-17 | 2014-11-17 | A kind of method for fast measuring of transformer thermometer ambient temperature effect amount |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410652905.7A CN104316222B (en) | 2014-11-17 | 2014-11-17 | A kind of method for fast measuring of transformer thermometer ambient temperature effect amount |
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| Publication Number | Publication Date |
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| CN104316222A CN104316222A (en) | 2015-01-28 |
| CN104316222B true CN104316222B (en) | 2018-04-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810420B (en) * | 2016-05-09 | 2017-06-23 | 国网山东省电力公司莱芜供电公司 | Transformer thermometer capillary scroll retaining devices |
| CN106205269A (en) * | 2016-09-19 | 2016-12-07 | 国家电网公司 | A kind of temperature measuring equipment simulated training table |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0141181A3 (en) * | 1983-09-09 | 1986-12-30 | Dagmar Faller | Maximum-minimum thermometer |
| SU1352241A1 (en) * | 1983-03-11 | 1987-11-15 | Специальное конструкторское бюро по приборостроению и средствам автоматизации | Temperature sending unit |
| CN101319969A (en) * | 2008-06-19 | 2008-12-10 | 浙江工业大学 | Fast appraisement method and device for refrigeration quality of miniature compression type refrigeration apparatus |
| CN102520278A (en) * | 2011-12-07 | 2012-06-27 | 中国电力科学研究院 | Device used for thermal stability and temperature rise test of transformer sleeve |
-
2014
- 2014-11-17 CN CN201410652905.7A patent/CN104316222B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1352241A1 (en) * | 1983-03-11 | 1987-11-15 | Специальное конструкторское бюро по приборостроению и средствам автоматизации | Temperature sending unit |
| EP0141181A3 (en) * | 1983-09-09 | 1986-12-30 | Dagmar Faller | Maximum-minimum thermometer |
| CN101319969A (en) * | 2008-06-19 | 2008-12-10 | 浙江工业大学 | Fast appraisement method and device for refrigeration quality of miniature compression type refrigeration apparatus |
| CN102520278A (en) * | 2011-12-07 | 2012-06-27 | 中国电力科学研究院 | Device used for thermal stability and temperature rise test of transformer sleeve |
Non-Patent Citations (1)
| Title |
|---|
| "环境温度变化对指针温度计准确度影响的鉴别方法";申莉等;《变压器》;20110531;第48卷(第5期);第49-51页 * |
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| CN104316222A (en) | 2015-01-28 |
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