CN105067144A - Winding temperature calculation method for fiber temperature controller of transformer - Google Patents

Winding temperature calculation method for fiber temperature controller of transformer Download PDF

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Publication number
CN105067144A
CN105067144A CN201510448296.8A CN201510448296A CN105067144A CN 105067144 A CN105067144 A CN 105067144A CN 201510448296 A CN201510448296 A CN 201510448296A CN 105067144 A CN105067144 A CN 105067144A
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CN
China
Prior art keywords
transformer
unit
temperature
current
load
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Application number
CN201510448296.8A
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Chinese (zh)
Inventor
李冬林
范国英
王加东
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泰安屹思达智能科技有限公司
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Priority to CN201510448296.8A priority Critical patent/CN105067144A/en
Publication of CN105067144A publication Critical patent/CN105067144A/en

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Abstract

The invention relates to a winding temperature calculation method for a fiber temperature controller of a transformer. The method comprises the steps that a) the load current I1 of the transformer is determined; b) the thermal load q1 of the transformer during operation is determined; c) the temperature deltaT of a winding is determined; and d) the winding temperature T is determined. A circuit board is used to data analysis and calculation, a current transformer is directly added to the integrated circuit board for CT current collection, additional arrangement of current transformer and heating capillary is not needed, the installation manner is simplified, calculation is carried out accurately according to performance parameters of the transformer, and the temperature calculation precision of the winding of the fiber temperature controller is improved.

Description

For the winding temperature calculating method of the fiber optic temperature controller of transformer

One, technical field

Patent of the present invention relates to a kind of winding temperature calculating method of fiber optic temperature controller, especially a kind of winding temperature calculating method of the fiber optic temperature controller for transformer.

Two, background technology

The working temperature of transformer is the important parameter of of mark transformer safety performance, and fiber optic temperature controller is the important device detected the working temperature of transformer, and therefore the winding temperature of fiber optic temperature controller is a kind of important parameter.

In the winding temperature calculating method of the existing temperature controller for transformer, use the method for thermal simulation, current matching device is used to change CT ER effect into a heating current, the heat that heating current produces on heating is to compensate temperature element, analogue copper oil temperature is poor, actuation temperature pointer instruction winding temperature.When using the method measuring transformer winding temperature, needing to be equipped with rectifier, for changing CT electric current, installing complicated, complex operation.

Three, summary of the invention

In order to overcome above-mentioned technical disadvantages, the object of patent of the present invention is to provide a kind of winding temperature calculating method of the fiber optic temperature controller for transformer, therefore carried out simplifying calculating according to the performance parameter of transformer, the winding temperature that improve fiber optic temperature controller calculates precision.

For achieving the above object, the technical scheme that patent of the present invention is taked is: a kind of winding temperature calculating method of the fiber optic temperature controller for transformer; It is characterized in that: the steps include:

A, determine load current I 1

I 1=Ip×K CT

Wherein: K cTrefer to CT no-load voltage ratio, I prefer to CT electric current;

B, determine heat be responsible for q1

q1= ×q

Wherein: I nrefer to high-pressure side rated current, q refers to the thermal load corresponding when the minimum tap of transformer and rated current;

C, determine winding copper oil temperature difference T

ΔT=K1×q 1×K2

Wherein: K1, K2 refer in design of transformer the constant calculating copper oil temperature difference;

D, determine winding temperature T

T=T 0+ΔT

Wherein: T 0refer to transformer top layer oil surface temperature.

The present invention devises, and the steps include:

(1) utilize the high precision electric current transducer in device, measure the current value I obtaining CT p, thus load current I can be calculated according to transformer computing formula and empirical calibration parameter 1, unit A

(2) thermal load under corresponding load is calculated.

(3) the copper oil temperature calculated under corresponding thermal load is poor.

(4) poor according to the above-mentioned copper oil temperature calculating transformer, add the oil surface temperature directly measured and obtain, obtain Transformer Winding temperature value.

In above-mentioned steps (1), load current I 1computing formula be:

I 1=Ip×K CT

Wherein: I 1for CT load current, unit A; K cTfor CT no-load voltage ratio constant, I pfor measuring the CT electric current obtained, unit A.

In above-mentioned steps (2), according to following formula heat load calculation:

q 1= ×q×K 1

Wherein: q 1for the thermal load that load current is corresponding, unit W/ ㎜ 2; I 2for high-pressure side rated current, unit A; I 1for high voltage side of transformer load current, unit A; Q is the thermal load corresponding when the minimum tap of transformer and rated current, unit W/ ㎜ 2; K 1for transformer empirical calibration constant.

When the minimum tap of transformer, corresponding thermal load q is that q computing formula is as follows by rated current, high pressure umber of turn and the cushion block parameter performance parameter of transformer by calculating:

Wherein, a, c are constant; I 2electric current during tap minimum for high-pressure side, unit A; Current density when ρ is the minimum tap in high-pressure side, unit A/ ㎜ 2; δ is coil eddy current loss, unit %; B is the conventional section every section number of turn of high-tension coil; D is axial dimension, unit mm; E is wire live width, unit mm; F is stay number; G is cushion block width, unit mm; H is that high-tension coil average turn is long, unit mm.

In above-mentioned steps (3), calculate high pressure winding copper oil temperature according to following formula poor:

ΔT=K 2× -K 3

Wherein: Δ T is that high-pressure side winding copper oil temperature is poor, unit DEG C; K, K 2, K 3refer in design of transformer the empirical calibration constant calculating copper oil temperature difference; q 1for the thermal load that load current is corresponding, unit W/ ㎜ 2.

The detailed content of above-mentioned steps (4) is: according to measuring the top layer oil surface temperature obtained, adding the above-mentioned copper oil temperature calculated poor, cutting the thermal constant in design of transformer, calculates high pressure winding temperature according to following formula:

T=T 0+ΔT

Wherein: T is high pressure winding temperature, unit DEG C; T 0for measuring the transformer top layer oil surface temperature obtained, unit DEG C.

In the technical program, CT refers to high voltage side of transformer current transformer.

Data analysis calculating is carried out owing to devising circuit board, and in surface-mounted integrated circuit, directly add current transformer carry out CT current acquisition, no longer need to increase current transformer and heated capillary, simplify mounting means, and carrying out accurate Calculation according to the performance parameter of transformer, the winding temperature that improve fiber optic temperature controller calculates precision.

Patent design of the present invention, based on the new procedures of transformer winding temperature gage calculation method, is used Single-chip Controlling instead, is made result of calculation more accurate.

In the technical program, heat load calculation is important technical characteristic, in the technical field of the winding temperature calculating method of the fiber optic temperature controller for transformer, have novelty, creativeness and practicality, the term in the technical program is all to make an explanation with patent documentation in the art and to understand.

Four, embodiment

Below in conjunction with embodiment, transformer model SSZ11-180000/220, voltage ratio 230 ± 8 × 1.25%/121/10.5, connecting group grade YNyn0d11, further describe the present invention, following examples are intended to the present invention instead of limitation of the invention further are described.

In the present embodiment, high-pressure side CT no-load voltage ratio K cT, high-pressure side rated current I 2, when the minimum tap of transformer, corresponding thermal load q is the important performance characteristic of transformer; When the minimum tap of transformer, corresponding thermal load q is that q computing formula is as follows by the performance parameter of transformer of the parameters such as rated current, high pressure umber of turn and cushion block by calculating:

Wherein, a, c are constant; I 2electric current during tap minimum for high-pressure side, unit A; Current density when ρ is the minimum tap in high-pressure side, unit A/ ㎜ 2; δ is coil eddy current loss, unit %; B is the conventional section every section number of turn of high-tension coil; D is axial dimension, unit mm; E is wire live width, unit mm; F is stay number; G is cushion block width, unit mm; H is that high-tension coil average turn is long, unit mm.Calculate single tape according to transformer to enter this transformer correlation parameter to try to achieve q be 1521W.High-pressure side CT no-load voltage ratio K cTfor 600:5, high-pressure side rated current I 2for 451.8A, constant k is 0.6, K1 be 0.75, K2 be 0.41, K3 is 2.

In the present embodiment, use optical fiber directly to imbed high-pressure side winding and directly measure winding temperature during transformer test, another point measures oil surface temperature.High-pressure side CT electric current I pbe 2.86A by galvanometer to transformer practical measurement value, transformer top layer oil surface temperature T 0be 32.6 DEG C by optical fiber temperature-measurement to transformer practical measurement value;

The steps include:

a, determine load current I 1

I 1=I p×K CT=2.86×600/5=343.2A

b, determine thermal load q 1

q 1= ×q×K 1=(343.22/451.82)×1521×0.75=658W

c, determine winding copper oil temperature difference T

ΔT=K 2× -K 3=0.41×658 0.6-2=18.1℃

d, determine winding temperature T

T=T 0+ΔT=32.6+18.1=50.7℃

In test, it is 51.65 DEG C by imbedding temperature value measured by the optical fiber measuring point in winding.It can thus be appreciated that the winding temperature drawn by accurate Calculation in this algorithm is close to actual value.

Patent of the present invention has lower feature:

1, owing to devising method optic module being integrated in circuit board, making optical fiber temperature-measurement be applied to transformer temperature controller measurement is a kind of new technical feature, and be no longer carry out thermometric by the temp measuring method such as conventional P T100, kapillary, optical fiber temperature-measurement precision is more accurate.

2, owing to devising, CT measurement current transform er, power module are combined in surface-mounted integrated circuit, reduce device volume, achieve integrated design, do not re-use conventional current transformer.This feature adopts high precision current transformer, has positive effect, can accurately measure CT electric current in actual measurement, thus accurate heat load calculation, finally realize the accurate Calculation of winding temperature.

3, owing to devising, the restriction of numerical range has been carried out to planform, numerical range is made to be technical characteristic in the technical scheme of patent of the present invention, be not by formulae discovery or tested the technical characteristic drawn by limited number of time, test shows that the technical characteristic of this numerical range achieves good technique effect.

4, owing to devising the technical characteristic of patent of the present invention, in the effect of the set separately and each other of technical characteristic, shown by test, the property indices of patent of the present invention be existing property indices be at least 1.7 times, by assessment, there is good marketable value.

Above-described embodiment is a kind of way of realization of the winding temperature calculating method of the fiber optic temperature controller for transformer provided by the present invention; according to other distortion of scheme provided by the present invention; the composition increased or reduce wherein or step; or the present invention is used for other the technical field close with the present invention, all belongs to protection scope of the present invention.

Claims (2)

1. the winding temperature calculating method for the fiber optic temperature controller of transformer; It is characterized in that: the steps include:
A, determine load current I 1
I 1=Ip×K CT
Wherein: K cTrefer to CT no-load voltage ratio, I prefer to CT electric current;
B, determine heat be responsible for q1
q1= ×q
Wherein: I nrefer to high-pressure side rated current, q refers to the thermal load corresponding when the minimum tap of transformer and rated current;
C, determine winding copper oil temperature difference T
ΔT=K1×q 1×K2
Wherein: K1, K2 refer in design of transformer the constant calculating copper oil temperature difference;
D, determine winding temperature T
T=T 0+ΔT
Wherein: T 0refer to transformer top layer oil surface temperature.
2. foundation transformer winding temperature gage according to claim 1 calculation method, is characterized in that: the steps include:
(1) utilize the high precision electric current transducer in device, measure the current value I obtaining CT p, thus load current I can be calculated according to transformer computing formula and empirical calibration parameter 1, unit A
(2) thermal load under corresponding load is calculated;
(3) the copper oil temperature calculated under corresponding thermal load is poor;
(4) poor according to the above-mentioned copper oil temperature calculating transformer, add the oil surface temperature directly measured and obtain, obtain Transformer Winding temperature value;
In above-mentioned steps (1), load current I 1computing formula be:
I 1=Ip×K CT
Wherein: I 1for CT load current, unit A; K cTfor CT no-load voltage ratio constant, I pfor measuring the CT electric current obtained, unit A;
In above-mentioned steps (2), according to following formula heat load calculation:
q 1= ×q×K 1
Wherein: q 1for the thermal load that load current is corresponding, unit W/ ㎜ 2; I 2for high-pressure side rated current, unit A; I 1for high voltage side of transformer load current, unit A; Q is the thermal load corresponding when the minimum tap of transformer and rated current, unit W/ ㎜ 2; K 1for transformer empirical calibration constant;
When the minimum tap of transformer, corresponding thermal load q is that q computing formula is as follows by rated current, high pressure umber of turn and the cushion block parameter performance parameter of transformer by calculating:
Wherein, a, c are constant; I 2electric current during tap minimum for high-pressure side, unit A; Current density when ρ is the minimum tap in high-pressure side, unit A/ ㎜ 2; δ is coil eddy current loss, unit %; B is the conventional section every section number of turn of high-tension coil; D is axial dimension, unit mm; E is wire live width, unit mm; F is stay number; G is cushion block width, unit mm; H is that high-tension coil average turn is long, unit mm;
In above-mentioned steps (3), calculate high pressure winding copper oil temperature according to following formula poor:
ΔT=K 2× -K 3
Wherein: Δ T is that high-pressure side winding copper oil temperature is poor, unit DEG C; K, K 2, K 3refer in design of transformer the empirical calibration constant calculating copper oil temperature difference; q 1for the thermal load that load current is corresponding, unit W/ ㎜ 2;
The detailed content of above-mentioned steps (4) is: according to measuring the top layer oil surface temperature obtained, adding the above-mentioned copper oil temperature calculated poor, cutting the thermal constant in design of transformer, calculates high pressure winding temperature according to following formula:
T=T 0+ΔT
Wherein: T is high pressure winding temperature, unit DEG C; T 0for measuring the transformer top layer oil surface temperature obtained, unit DEG C.
CN201510448296.8A 2015-07-28 2015-07-28 Winding temperature calculation method for fiber temperature controller of transformer CN105067144A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108917984A (en) * 2018-06-20 2018-11-30 国网天津市电力公司电力科学研究院 The non-intrusion type winding temperature measurement method of the air-cooled pie winding transformer of forced oil-circulation
CN109029781A (en) * 2018-06-20 2018-12-18 国网天津市电力公司电力科学研究院 The non-intrusion type winding temperature measurement method of the air-cooled laminar winding transformer of forced oil-circulation

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2073432B (en) * 1980-03-31 1983-06-29 Accurate Controls Ltd Determining electrically the temperature of a transformer winding
JPS58154212A (en) * 1982-03-10 1983-09-13 Toshiba Corp Apparatus for supervising and controlling operation of transformer
JPH05227644A (en) * 1991-05-13 1993-09-03 Mitsubishi Electric Corp Transformer diagnosing equipment
CN2569119Y (en) * 2002-09-18 2003-08-27 新疆特变电工股份有限公司 On-line monitor for hot-spot temp of transformer winding
CN103399241A (en) * 2013-08-15 2013-11-20 南京新联电子股份有限公司 Distribution transformer fault diagnosis system and method based on relation between temperature rise and load
CN103454001A (en) * 2013-07-23 2013-12-18 大连众和光电科技有限公司 Method and equipment for simultaneously monitoring transformer oil surface temperature and winding temperature
CN104165660A (en) * 2014-09-10 2014-11-26 上海海能信息科技有限公司 Intelligent distribution and transformation monitoring terminal capable of calculating winding temperature
CN104198067A (en) * 2014-08-22 2014-12-10 国家电网公司 Winding temperature measuring method for transformer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2073432B (en) * 1980-03-31 1983-06-29 Accurate Controls Ltd Determining electrically the temperature of a transformer winding
JPS58154212A (en) * 1982-03-10 1983-09-13 Toshiba Corp Apparatus for supervising and controlling operation of transformer
JPH05227644A (en) * 1991-05-13 1993-09-03 Mitsubishi Electric Corp Transformer diagnosing equipment
CN2569119Y (en) * 2002-09-18 2003-08-27 新疆特变电工股份有限公司 On-line monitor for hot-spot temp of transformer winding
CN103454001A (en) * 2013-07-23 2013-12-18 大连众和光电科技有限公司 Method and equipment for simultaneously monitoring transformer oil surface temperature and winding temperature
CN103399241A (en) * 2013-08-15 2013-11-20 南京新联电子股份有限公司 Distribution transformer fault diagnosis system and method based on relation between temperature rise and load
CN104198067A (en) * 2014-08-22 2014-12-10 国家电网公司 Winding temperature measuring method for transformer
CN104165660A (en) * 2014-09-10 2014-11-26 上海海能信息科技有限公司 Intelligent distribution and transformation monitoring terminal capable of calculating winding temperature

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
变压器杂志编辑部: "《电力变压器设计计算方法》", 31 July 1988 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108917984A (en) * 2018-06-20 2018-11-30 国网天津市电力公司电力科学研究院 The non-intrusion type winding temperature measurement method of the air-cooled pie winding transformer of forced oil-circulation
CN109029781A (en) * 2018-06-20 2018-12-18 国网天津市电力公司电力科学研究院 The non-intrusion type winding temperature measurement method of the air-cooled laminar winding transformer of forced oil-circulation
CN108917984B (en) * 2018-06-20 2020-06-02 国网天津市电力公司电力科学研究院 Non-invasive winding temperature measurement method for forced oil circulation air-cooled pancake winding transformer
CN109029781B (en) * 2018-06-20 2020-06-02 国网天津市电力公司电力科学研究院 Non-invasive winding temperature measurement method for forced oil circulation air cooling layer type winding transformer

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Application publication date: 20151118