CN109060158A - Oil-immersed transformer Intellectual Gauge of Temperature and its data processing method - Google Patents
Oil-immersed transformer Intellectual Gauge of Temperature and its data processing method Download PDFInfo
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- CN109060158A CN109060158A CN201810812666.5A CN201810812666A CN109060158A CN 109060158 A CN109060158 A CN 109060158A CN 201810812666 A CN201810812666 A CN 201810812666A CN 109060158 A CN109060158 A CN 109060158A
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
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- G06—COMPUTING; CALCULATING OR COUNTING
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Abstract
The present invention provides oil-immersed transformer Intellectual Gauge of Temperature and its data processing method.The measuring device includes temperature sensor, current signal receiving unit and master controller, the temperature sensor includes top-oil temperature temperature sensor and environment temperature sensor, the master controller includes signal processing unit, micro-control unit and display unit, the current signal receiving unit, the top-oil temperature temperature sensor and the environment temperature sensor are connect with the signal processing unit, the signal processing unit is connect with the micro-control unit, and the display unit is arranged on the master controller；The micro-control unit is used for the first calculation formula of hot(test)-spot temperature when increasing according to hot(test)-spot temperature or the hot(test)-spot temperature of hot(test)-spot temperature the second calculation formula calculating transformer winding when hot(test)-spot temperature reduces.The data processing method makes calculated result closer to true value.Described device is more reliable, more credible, while also exportable transformer insulated life information.
Description
Technical field
The present invention relates to field transformers, in particular to oil-immersed transformer Intellectual Gauge of Temperature and its data processing
Method.
Background technique
The transformer oil surface temperature measuring device that traditional oil-immersed transformer uses mainly by elastic element, capillary,
Thermometer bulb and microswitch composition.When thermometer bulb is heated, dilatation caused by temperature sensing medium expanded by heating passes through hair in thermometer bulb
Tubule is transmitted on elastic element, and elastic element is made to generate a displacement, this displacement indicates tested after movement mechanism amplifies
Temperature simultaneously drives microswitch to work.Due to traditional transformer oil surface temperature measuring device use mechanical structure, precision with
Poor reliability, and there are security risks.
In addition, since traditional transformer oil surface temperature measuring device cannot obtain real-time environment temperature and transformer electricity
Flow valuve, so coiling hot point of transformer temperature and transformer life cannot be calculated dynamically indirectly.
Summary of the invention
The purpose of the invention is to make up above-mentioned at least one insufficient, proposition oil-immersed transformer intelligence in the prior art
It can temperature measuring device and its data processing method.
In order to solve the above technical problems, the invention adopts the following technical scheme:
Oil-immersed transformer Intellectual Gauge of Temperature, including temperature sensor, current signal receiving unit and main control
Device, the temperature sensor include top-oil temperature temperature sensor and environment temperature sensor, and the master controller includes signal
Processing unit, micro-control unit and display unit, the current signal receiving unit, the top-oil temperature temperature sensor and institute
It states environment temperature sensor to connect with the signal processing unit, the signal processing unit and the micro-control unit connect
It connects, the display unit is arranged on the master controller；The micro-control unit is used for heat when increasing according to hot(test)-spot temperature
The hot spot of hot(test)-spot temperature the second calculation formula calculating transformer winding when point one calculation formula of temperature control or hot(test)-spot temperature reduce
Temperature；
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein,
θhIt (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiWhen to start
Gradient of the top-oil temperature to environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot spot temperature when to start
The gradient to top-oil temperature is spent, R is the ratio of load loss and no-load loss under rated current, and K is load factor, and H is hot spot
Coefficient, grFor gradient of the winding mean temperature to oily mean temperature, g under rated currentrThat is copper oil temperature is poor, and x is total losses to top layer
The exponential depth that oil temperature rises, y are exponential depth of the electric current to winding temperature rise, function f1(t) it indicates to press top-oil temperature liter when steady-state value is 1
Relative increase, function f2(t) indicate to press relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13
(t) (relative reduction amount of the top-oil temperature to environment temperature gradient, function f when total decreasing value is 1 are indicated4(t) total decreasing value is indicated
For hot spot to the relative reduction amount of top-oil temperature degree gradient, e is natural constant, τ when being 1wFor the thermal time constant of winding, τ0It is flat
Oil time constant, k11、k21And k22For the thermal characteristics constant of transformer.
In some preferred embodiments, the master controller is additionally provided with communication interface, and the communication interface is for counting
According to transmission.
In some preferred embodiments, the master controller is additionally provided with alarm unit.
In further preferred embodiment, the alarm unit is buzzer.
In some preferred embodiments, the current signal receiving unit is believed for receiving transformer current transformer
Number or current digital signal.
In some preferred embodiments, the top-oil temperature temperature sensor and the environment temperature sensor are all provided with
There is spare sensor.
In some preferred embodiments, the master controller is additionally provided with parameter/configuration interface；The master controller is also
Equipped with relay.
On the other hand, the present invention also provides the data processing sides of above-mentioned oil-immersed transformer Intellectual Gauge of Temperature
Method, comprising:
Pass through the current signal receiving unit, the top-oil temperature temperature sensor and the environment temperature sensor point
Not Huo get the load current value of transformer, the top-oil temperature of transformer and transformer ambient temperature；
Hot(test)-spot temperature calculated value is calculated according to first calculation formula or second calculation formula；
The hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value by the micro-control unit, according to than
Relatively result changes the characterisitic parameter of transformer in first calculation formula and second calculation formula so that the hot spot temperature
Degree calculated value is equal with the hot(test)-spot temperature measured value or makes the hot(test)-spot temperature calculated value and the hot(test)-spot temperature measured value
Difference be in setting range value, thus the calculation formula after being adjusted.
In some preferred embodiments, the hot(test)-spot temperature measured value utilizes fiber plant by transformer test
Measurement obtains or when off-test is obtained by resistance measurement；If passing through optical fibre measuring method using fiber plant
Obtain hot(test)-spot temperature measured value；If using electric-resistivity method, using temperature rise test at the end of the temperature value that measures as hot spot
Temperature measured value.
In some preferred embodiments, according to the non-thermal modified paper of the hot(test)-spot temperature measured value calculating transformer of acquisition
Or the opposite ageing rate of heat modification paper, the opposite ageing rate integrates the time, to calculate the transformer insulated longevity
Life.
Compared with prior art, the beneficial effects of the present invention are as follows:
By obtaining top-oil temperature, ambient temperature and transformer current value, calculate indirectly in real time transformer around
Group hot(test)-spot temperature simultaneously estimates the transformer insulated service life, also by display unit Dynamically Announce.The hot spot temperature of winding obtained in this way
Data are more acurrate, and device is more reliable, more credible, while also exportable transformer insulated life information.
Detailed description of the invention
Fig. 1 is the circuit topology figure of oil-immersed transformer Intellectual Gauge of Temperature of the invention；
Fig. 2 is the structural schematic diagram of oil-immersed transformer Intellectual Gauge of Temperature of the invention.
Specific embodiment
It elaborates below to embodiments of the present invention.It is emphasized that following the description is only exemplary,
The range and its application being not intended to be limiting of the invention.
With reference to Fig. 1, oil-immersed transformer Intellectual Gauge of Temperature of the invention includes temperature sensor 1, current signal
Receiving unit 21 and master controller 3.Temperature sensor 1 and current signal receiving unit 21 are connect with master controller 3, and being used for will
The signal of acquisition is transferred to master controller 3 and is handled and calculated.
With reference to Fig. 1, temperature sensor 1 includes top-oil temperature temperature sensor 11 and environment temperature sensor 12.Top layer oil
Warm temperature sensor 11 is used for the top-oil temperature of measuring transformer；Environment temperature sensor 12 is then used for the outside of measuring transformer
Environment temperature.Top-oil temperature temperature sensor 11 and environment temperature sensor 12 are equipped with spare sensor, that is to say, that top
The quantity of layer oil temperature temperature sensor 11 and environment temperature sensor 12 is at least two, wherein there is a top-oil temperature temperature
Sensor 11 and an environment temperature sensor 12 are as spare.
Current signal receiving unit 21 is for receiving current transducer signal or current digital signal, such as reception from change
Depressor carries the current analog or digital signal of current sensor (such as current transformer).
With reference to Fig. 1 and Fig. 2, master controller 3 include signal processing unit 31, micro-control unit 32 (MCU,
Microcontroller Unit), display unit 35 and power interface 301.Signal processing unit 31 is used for temperature and electric current
Signal is handled, and is converted into digital signal and is sent to micro-control unit 32；Exemplary, signal processing unit 31 is analog-to-digital conversion
Circuit.Micro-control unit 32 is used to carry out operation by the calculation procedure of setting to data, and carries out algorithm design.Display unit
35 are used for displays temperature and other parameters information such as transformer insulated service life, top-oil temperature and ambient temperature etc..
With reference to Fig. 2, power interface 301 is for connecting to power supply, to power for whole device；Certainly, measuring device can also be built-in
Power supply 36.
With reference to Fig. 1, current signal receiving unit 21, top-oil temperature temperature sensor 11 and environment temperature sensor 12 with
Signal processing unit 31 connects.Signal processing unit 31 is connect with micro-control unit 32, and display unit 35 is arranged in master controller 3
On.In addition, current signal receiving unit 21 is equipped with current communication interface 304, for obtaining current signal with reference to Fig. 2.
Micro-control unit 32 is used for the first calculation formula of hot(test)-spot temperature or hot(test)-spot temperature drop when increasing according to hot(test)-spot temperature
The hot(test)-spot temperature of hot(test)-spot temperature the second calculation formula calculating transformer winding when low.
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein,
θhIt (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiWhen to start
Gradient of the top-oil temperature to environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot spot temperature when to start
The gradient to top-oil temperature is spent, R is the ratio of load loss and no-load loss under rated current, and K is load factor (load electricity
Stream/rated current), H is hot spot coefficient, grIt is winding mean temperature under rated current to the ladder of oily mean temperature (in fuel tank)
Degree, grThat is copper oil temperature is poor, and x is the exponential depth (oily index) that total losses rise top-oil temperature, and y is index of the electric current to winding temperature rise
Power (around class index), function f1(t) it indicates to press the relative increase that top-oil temperature rises when steady-state value is 1, function f2(t) it indicates to press
Relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13(t) top layer oil when total decreasing value is 1 is indicated
Relative reduction amount of the temperature to environment temperature gradient, function f4(t) indicate that hot spot is to top-oil temperature degree gradient when total decreasing value is 1
Relative reduction amount, e are natural constant, τwFor the thermal time constant of winding, τ0For average oily time constant, k11、k21And k22To become
The thermal characteristics constant of depressor.Wherein x and y can be by tabling look-up to obtain.The characterisitic parameter of transformer includes k11、k21、k22、x、y、H、
τ0And τw。
When oil-immersed transformer Intellectual Gauge of Temperature works, the top of 11 measuring transformer of top-oil temperature temperature sensor
Layer oil temperature, the ambient temperature of 12 measuring transformer of environment temperature sensor, current signal receiving unit 21 obtain transformer
Load current.Signal processing unit 31 to top-oil temperature signal above-mentioned, ambient temperature signal, load current signal into
Row amplification filters and is converted into the manageable signal of micro-control unit 32.Micro-control unit 32 is from signal processing unit
31 obtained temperature and current signal are according to the first calculation formula or the progress operation of the second calculation formula；When hot(test)-spot temperature increases,
Hot(test)-spot temperature calculated value is calculated according to the first calculation formula；When hot(test)-spot temperature reduces, hot spot temperature is calculated according to the second calculation formula
Spend calculated value；Specific calculating process please refers to standard GB/T/T 1094.7-2008 (power transformer Part VII), such as
Coiling hot point of transformer temperature value can be obtained in this.Since the ageing rate of transformer is the root on the basis of hot spot temperature of winding
The non-thermal modified paper of transformer or the opposite ageing rate of heat modification paper can be calculated according to hot spot temperature of winding, and with respect to ageing rate pair
The integral of time is exactly life loss, to calculate the transformer insulated service life, specific calculating process please refers to national standard
GB/T 1094.7-2008 (power transformer Part VII).Micro-control unit 32 is by hot(test)-spot temperature value and transformer insulated longevity
Life information is sent to display unit 35, is shown by display unit 35.
As described above, being counted indirectly in real time by obtaining top-oil temperature, ambient temperature and transformer current value
It calculates coiling hot point of transformer temperature and estimates the transformer insulated service life, also by 35 Dynamically Announce of display unit.It obtains in this way
Hot spot temperature of winding data it is more acurrate, device is more reliable, more credible, while also exportable transformer insulated life information.
With reference to Fig. 1, oil-immersed transformer Intellectual Gauge of Temperature further includes alarm unit 33 and relay 34, and alarm is single
Member 33 and relay 34 are arranged on master controller 3.It is exemplary, alarm unit 33 and relay 34 with micro-control unit 32
Connection.Micro-control unit 32 can realize that warning output, warning output refer to that micro-control unit 32 judges measured value such as hot spot temperature
Whether angle value exceeds the alarm threshold value of setting, exports warning message and relay switch information if beyond alarm threshold value.
Alarm unit 33 can be buzzer, the capable of emitting alarm sound of such alarm unit 33；Certainly, alarm unit 33 can also be finger
Show lamp.Relay 34 starts to act after receiving switching information, can close or open relevant equipment, for example close transformation
Device opens protection circuit.
With reference to Fig. 1 and Fig. 2, master controller 3 is additionally provided with communication interface 302 and parameter/configuration interface 303.Communication interface 302
It is transmitted for data, for example carries out remote data transmission.Parameter/configuration interface 303 be then with to master controller 3 carry out configuration or
Modification, such as modification parameter specifically can be the characteristic ginseng of the first calculation formula of modification or the transformer in the second calculation formula
Number.
On the other hand, the present invention also provides the data processing method of oil-immersed transformer Intellectual Gauge of Temperature, oil
Immersion intelligent transformer temperature measuring device can be above-mentioned oil-immersed transformer Intellectual Gauge of Temperature of the invention, can also
Think other measuring devices.By taking oil-immersed transformer Intellectual Gauge of Temperature of the invention as an example to the data processing method into
Row explanation.Data processing method of the invention includes step S1 to step S3.
Step S1, pass through current signal receiving unit 21, top-oil temperature temperature sensor 11 and environment temperature sensor 12
Load current value, the top-oil temperature of transformer and the ambient temperature of transformer of transformer are obtained respectively.
Step S2, hot(test)-spot temperature calculated value is calculated according to the first calculation formula or the second calculation formula.Specifically, letter
Number processing unit 31 amplifies top-oil temperature signal above-mentioned, ambient temperature signal, load current signal, filter with
And it is converted into the manageable signal of micro-control unit 32；Micro-control unit 32 the temperature that is obtained from signal processing unit 31 and
Current signal carries out operation according to the first calculation formula or the second calculation formula, to obtain hot(test)-spot temperature calculated value, specifically
Calculating process please refers to standard GB/T/T 1094.7-2008.
Step S3, hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value by micro-control unit 32, wherein
Hot(test)-spot temperature measured value can be obtained or off-test by transformer test, such as temperature rise test using fiber plant measurement
When obtained by resistance measurement；If obtaining hot(test)-spot temperature measured value by optical fibre measuring method using fiber plant；Such as
Fruit uses electric-resistivity method, then using temperature rise test at the end of the temperature value that measures as hot(test)-spot temperature measured value；Specific measurement side
Method please refers to standard GB/T/T 1094.7-2008；Micro-control unit 32 changes the first calculation formula and the according to comparison result
The characterisitic parameter of transformer is so that hot(test)-spot temperature calculated value is equal with hot(test)-spot temperature measured value, to be adjusted in two calculation formula
The first calculation formula and the second calculation formula after whole；Or make at the difference of hot(test)-spot temperature calculated value and hot(test)-spot temperature measured value
In in setting range value, setting range value such as can be ± 0.1%, thus the first calculation formula and second after being adjusted
Calculation formula；Here hot(test)-spot temperature measured value, which can be, obtains hot(test)-spot temperature measured value by optical fibre measuring method, can also be with
It is using the electric-resistivity method temperature value that measurement obtains at the end of temperature rise test.
Micro-control unit 32 is in subsequent measurement process according to the first calculation formula adjusted and the second calculation formula
Hot spot temperature of winding is calculated, to accurately calculate hot spot temperature of winding and estimate the transformer insulated service life, it is contemplated that environment temperature
Degree, load current may make dynamic calculated result to match with true value, calculated result is closer the Transient State Influence of hot(test)-spot temperature
True value.
The present invention can also be achieved:
Since the temperature of hot spot (hottest point of winding) changes over time, the hot spot temperature of different moments can get
Spend the hot(test)-spot temperature measured value of calculated value and different moments, the hot(test)-spot temperature calculated values of different moments is by the first calculation formula or the
Two calculation formula are calculated, and are handled and inputted the first calculation formula or the second meter for the information of different moments measured
Calculate the hot(test)-spot temperature calculated value that different moments can be obtained in formula.For the hot(test)-spot temperature measured value of different moments, can pass through
The hot(test)-spot temperature of the different moments of measuring transformer winding, for example measured using optical fibre measuring method, thus when obtaining different
The hot(test)-spot temperature measured value at quarter.
In this way, the hot(test)-spot temperature calculated value of different moments can be compared with the hot(test)-spot temperature measured value of different moments,
The characterisitic parameter for changing transformer in the first calculation formula and the second calculation formula according to comparison result, so that the heat of different moments
Point temperature calculations and the hot(test)-spot temperature measured value of different moments are corresponding equal, or calculate the hot(test)-spot temperature of different moments
Value with the difference of the hot(test)-spot temperature measured value of different moments is also corresponding is in setting range value, thus the after being adjusted
One calculation formula and the second calculation formula.Measuring device it is subsequent according to the first calculation formula adjusted and the second calculation formula come
Calculate hot(test)-spot temperature.It is such to be advantageous in that, the hot(test)-spot temperature being calculated can be made closer to true value.
The above content is combine it is specific/further detailed description of the invention for preferred embodiment, cannot recognize
Fixed specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs,
Without departing from the inventive concept of the premise, some replacements or modifications can also be made to the embodiment that these have been described,
And these substitutions or variant all shall be regarded as belonging to protection scope of the present invention.
Claims (10)
1. oil-immersed transformer Intellectual Gauge of Temperature, it is characterised in that: including temperature sensor, current signal receiving unit
And master controller, the temperature sensor include top-oil temperature temperature sensor and environment temperature sensor, the master controller
Including signal processing unit, micro-control unit and display unit, the current signal receiving unit, the top-oil temperature temperature are passed
Sensor and the environment temperature sensor are connect with the signal processing unit, the signal processing unit and the microcontroller
Unit connection, the display unit are arranged on the master controller；The micro-control unit according to hot(test)-spot temperature for increasing
When the first calculation formula of hot(test)-spot temperature or hot(test)-spot temperature reduce when hot(test)-spot temperature the second calculation formula calculating transformer winding
Hot(test)-spot temperature；
First calculation formula are as follows:
Second calculation formula are as follows:
Wherein, θh
It (t) is the transient state hot(test)-spot temperature of the variation of t at any time, θaFor transformer ambient temperature, Δ θoiTop-oil temperature when to start
To the gradient of environment temperature, Δ θorFor top-oil temperature temperature rise under nominal loss, Δ θhiHot(test)-spot temperature when to start is to top layer oil
The gradient of temperature, R are the ratio of load loss and no-load loss under rated current, and K is load factor, and H is hot spot coefficient, grFor volume
Gradient of the winding mean temperature to oily mean temperature, g under constant currentrThat is copper oil temperature is poor, and x is the finger that total losses rise top-oil temperature
Number power, y are exponential depth of the electric current to winding temperature rise, function f1(t) it indicates to press the relative increase that top-oil temperature rises when steady-state value is 1
Amount, function f2(t) indicate to press relative increase of the hot spot to top-oil temperature degree gradient, function f when steady-state value is 13(t) (indicate total
Relative reduction amount of the top-oil temperature to environment temperature gradient, function f when decreasing value is 14(t) hot spot when total decreasing value is 1 is indicated
To the relative reduction amount of top-oil temperature degree gradient, e is natural constant, τwFor the thermal time constant of winding, τ0It is normal for the average oily time
Number, k11、k21And k22For the thermal characteristics constant of transformer.
2. oil-immersed transformer Intellectual Gauge of Temperature according to claim 1, it is characterised in that: the master controller
It is additionally provided with communication interface, the communication interface is transmitted for data.
3. oil-immersed transformer Intellectual Gauge of Temperature according to claim 1, it is characterised in that: the master controller
It is additionally provided with alarm unit.
4. oil-immersed transformer Intellectual Gauge of Temperature according to claim 3, it is characterised in that: the alarm unit
For buzzer.
5. oil-immersed transformer Intellectual Gauge of Temperature according to claim 1, it is characterised in that: the current signal
Receiving unit is used for receiving transformer current transducer signal or current digital signal.
6. oil-immersed transformer Intellectual Gauge of Temperature according to claim 1, it is characterised in that: the top-oil temperature
Temperature sensor and the environment temperature sensor are equipped with spare sensor.
7. oil-immersed transformer Intellectual Gauge of Temperature according to claim 1, it is characterised in that: the master controller
It is additionally provided with parameter/configuration interface；The master controller is additionally provided with relay.
8. the data processing method of oil-immersed transformer Intellectual Gauge of Temperature according to any one of claims 1 to 7,
It is characterised by comprising:
It is obtained respectively by the current signal receiving unit, the top-oil temperature temperature sensor and the environment temperature sensor
Obtain load current value, the top-oil temperature of transformer and the ambient temperature of transformer of transformer；
Hot(test)-spot temperature calculated value is calculated according to first calculation formula or second calculation formula；
The hot(test)-spot temperature calculated value is compared with hot(test)-spot temperature measured value by the micro-control unit, is tied according to comparing
Fruit changes the characterisitic parameter of transformer in first calculation formula and second calculation formula so that the hot(test)-spot temperature meter
Calculation value is equal with the hot(test)-spot temperature measured value or makes the difference of the hot(test)-spot temperature calculated value Yu the hot(test)-spot temperature measured value
Value is in setting range value, thus the calculation formula after being adjusted.
9. data processing method according to claim 8, it is characterised in that: the hot(test)-spot temperature measured value passes through transformer
Test, is obtained using fiber plant measurement or when off-test is obtained by resistance measurement；If using fiber plant,
Hot(test)-spot temperature measured value is obtained by optical fibre measuring method；If measurement at the end of temperature rise test obtained using electric-resistivity method
Temperature value as hot(test)-spot temperature measured value.
10. data processing method according to claim 8 or claim 9, it is characterised in that further include: according to the hot(test)-spot temperature of acquisition
The non-thermal modified paper of measured value calculating transformer or the opposite ageing rate of heat modification paper carry out the opposite ageing rate to the time
Integral, to calculate the transformer insulated service life.
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Cited By (7)
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| CN109765946A (en) * | 2019-02-01 | 2019-05-17 | 高爱祥 | A kind of transformer temperature controller and control method |
| CN110007182A (en) * | 2019-03-22 | 2019-07-12 | 中国电力科学研究院有限公司 | A kind of the health status method for early warning and device of distribution transformer |
| CN110440852A (en) * | 2019-07-18 | 2019-11-12 | 正泰电气股份有限公司 | Oil-immersed transformer lifetime estimation method and assessment device |
| CN111814302A (en) * | 2020-05-28 | 2020-10-23 | 嘉兴市恒光电力建设有限责任公司 | Fault removing system and method for transformer insulating oil temperature acquisition and transmission loop |
| CN112362185A (en) * | 2020-11-09 | 2021-02-12 | 广东电网有限责任公司佛山供电局 | Digital transformer thermometer |
| CN112461390A (en) * | 2020-10-16 | 2021-03-09 | 国网江苏省电力有限公司电力科学研究院 | Distributed comparison type temperature measurement module and method suitable for oil-immersed transformer |
| CN112595745A (en) * | 2020-12-02 | 2021-04-02 | 西南交通大学 | Heat dissipation characteristic evaluation method for dry-type vehicle-mounted traction transformer |
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| CN109765946A (en) * | 2019-02-01 | 2019-05-17 | 高爱祥 | A kind of transformer temperature controller and control method |
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| CN110007182B (en) * | 2019-03-22 | 2024-04-16 | 中国电力科学研究院有限公司 | Distribution transformer health state early warning method and device |
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| CN111814302A (en) * | 2020-05-28 | 2020-10-23 | 嘉兴市恒光电力建设有限责任公司 | Fault removing system and method for transformer insulating oil temperature acquisition and transmission loop |
| CN111814302B (en) * | 2020-05-28 | 2024-03-08 | 嘉兴市恒光电力建设有限责任公司 | Transformer insulating oil temperature acquisition transmission loop fault removal system and method |
| CN112461390A (en) * | 2020-10-16 | 2021-03-09 | 国网江苏省电力有限公司电力科学研究院 | Distributed comparison type temperature measurement module and method suitable for oil-immersed transformer |
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| CN112595745A (en) * | 2020-12-02 | 2021-04-02 | 西南交通大学 | Heat dissipation characteristic evaluation method for dry-type vehicle-mounted traction transformer |
| CN112595745B (en) * | 2020-12-02 | 2021-09-24 | 西南交通大学 | Heat dissipation characteristic evaluation method for dry-type vehicle-mounted traction transformer |
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