CN103148965B - Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller - Google Patents
Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller Download PDFInfo
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- CN103148965B CN103148965B CN201310060960.2A CN201310060960A CN103148965B CN 103148965 B CN103148965 B CN 103148965B CN 201310060960 A CN201310060960 A CN 201310060960A CN 103148965 B CN103148965 B CN 103148965B
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Abstract
The invention relates to a temperature rise characteristic field testing method of a thermal simulation device of a transformer winding temperature controller. The method comprises the following steps of: 1) keeping the temperature bulb of the temperature controller and an electric heating element in the thermal simulation device to be normally installed on a transformer, and when the internal temperature of the shut-down transformer drops to be consistent with ambient temperature, reading the indicated temperature value of the temperature controller and recording the temperature value as T1; 2) according to parameters such as the rated load current of the transformer and the transformation ratio of a current transformer, calculating and determining the magnitude of testing heating current Ih and outputting the current to the temperature controller through a constant-current source device; 3) after the indicated temperature value of the temperature controller is stabilized for 45 minutes, reading the indicated temperature value and recording the temperature value as T2; and 4) calculating temperature rise delta T=T2-T1 produced by the thermal simulation device of the temperature controller under the condition of the heating current Ih corresponding to the load current of the transformer which is I, so as to obtain the temperature rise characteristic. The temperature rise characteristic field testing method of the thermal simulation device of the transformer winding temperature controller has the advantages that the problem that the temperature rise characteristic of the thermal simulation device of the temperature controller cannot be tested in the field at present is solved, and the accuracy and the reliability of the measurement of the winding temperature controller in service are guaranteed.
Description
Technical field
The present invention relates to a kind of method of Winding in Power Transformer temperature controller (hereinafter referred to as temperature controller) thermal cycle simulation temperature characteristic site test.
Background technology
When power transformer runs, winding temperature is directly connected to insulating capacity and the life-span of transformer.Transformer Winding temperature controller, for measuring and monitor the winding temperature of transformer, is the important measurement and proterctive equipment that ensure that transformer safety is run.The copper oil temperature that temperature controller employing " thermal simulation " technique device carrys out measuring transformer is poor, and the accuracy of thermal cycle simulation temperature characteristic is directly connected to the accuracy of winding temperature measurement, and its characteristic needs to be confirmed by routine test.
Described Transformer Winding temperature controller thermal cycle simulation temperature characteristic refers to: the heating current I that temperature controller thermal cycle simulation is corresponding when transformer rated load current is I
hthe temperature rise produced is Δ T=T
2-T
1=K
i* I
h 2* R(wherein K
icoefficient for relevant with transformer Cooling structure), i.e. the temperature characteristic of temperature controller thermal cycle simulation.
The periodic check determining most of in-service winding temperature controller due to power transformer operation characteristic must carry out at transformer field, but temperature controller thermal cycle simulation temperature characteristic can only be tested at present in the Special constant temperature oil groove in laboratory, this thermostatic oil bath volume, weight are all comparatively large, cannot be transported to transformer field and test.And be applied to scene temperature indicating value verification Portable thermostatic bath due to cell body volume little, actuating medium is few, when carrying out temperature rise test, the heating heating of thermal cycle simulation will have a strong impact on the stable of temperature in groove, cause test to carry out, thus also cannot be applied to the site test of temperature controller thermal cycle simulation temperature characteristic.Therefore, current winding temperature controller substantially all only verifies fuel temperature measurement function in regular site test, and abandon completely the temperature characteristic of temperature controller thermal cycle simulation is tested, this all brings certain potential safety hazard to the operation of temperature controller self and transformer.
Summary of the invention
Technical matters to be solved by this invention, just be to provide a kind of method of Transformer Winding temperature controller thermal cycle simulation temperature characteristic site test, the present invention can complete the test of temperature controller thermal cycle simulation temperature characteristic without the need to thermostatic oil bath, solves during current temperature controller verifies at the scene and cannot carry out for the temperature characteristic of thermal cycle simulation the problem tested.
Solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A method for Transformer Winding temperature controller thermal cycle simulation temperature characteristic site test, comprises the following steps:
S1 keeps heating normal mounting in temperature controller thermometer bulb and thermal cycle simulation on the transformer, transformer stop transport reduce to consistent with environment temperature to its internal temperature time, read temperature controller temperature indicating value, be designated as T
1;
S2, according to parameters such as transformer rated load current, current transformer ratios, calculates and determines test heating current I
hsize, and by constant-current source device, electric current is exported to temperature controller.The heating of S3 heating makes temperature controller temperature indicating value rise, and after temperature controller temperature indicating value stablizes 45 minutes, reads this indicating value, is designated as T
2;
S4 temperature controller thermal cycle simulation heating current I when transformer rated load current is I
hthe temperature rise Δ T=T produced
2-T
1, the method is actually large-scale constant temperature cell body inside transformer being similar to and being considered as a temperature stabilization, tests the temperature characteristic of temperature controller thermal cycle simulation under current environmental temperature condition.
The I of step S2
hthe defining method of value is: the first step is the temperature rise data providing this transformer according to transformer manufacturer, show that copper oil temperature difference (difference of coiling hotspot and the oil surface temperature) second step of this transformer when full load is according to Δ T size, verify the temperature characteristic curve map given by winding temperature gage producer, determine to obtain compensation heating current I corresponding to Δ T
h.
Beneficial effect: the present invention can solve the problem cannot carrying out site test at present to temperature controller thermal cycle simulation temperature characteristic when not increasing any other testing equipment, ensure the accuracy that in-service winding temperature controller is measured and reliability, thus play important leverage effect for the safety of power transformer, reliability service
Accompanying drawing explanation
Fig. 1 is a kind of temperature rise test verifying process flow figure being applicable to the calibrating of on-the-spot Transformer Winding formula thermometer that the embodiment of the present invention provides.
Embodiment
For making the present invention easier to understand, below in conjunction with accompanying drawing, the present invention is further elaborated, but the embodiment in accompanying drawing does not form any limitation of the invention.
As shown in Figure 1, the embodiment of the present invention be applicable to on-the-spot Transformer Winding formula thermometer temperature-raising experimental method process flow diagram, concrete steps of the present invention are as follows:
A, maintenance temperature controller thermometer bulb and heating normal mounting on the transformer, now do not apply test current to temperature controller heating, when transformer stoppage in transit is reduced to consistent with environment temperature to its internal temperature, read temperature controller temperature indicating value, are designated as T
1;
B, according to parameters such as transformer rated load current, current transformer ratios, calculate and determine test heating current I
hsize, and by constant-current source device, electric current is exported to temperature controller;
I
hthe defining method of value is: the first step is the temperature rise data providing this transformer according to transformer manufacturer, show that copper oil temperature difference (difference of coiling hotspot and the oil surface temperature) second step of this transformer when full load is according to Δ T size, verify the temperature characteristic curve map given by winding temperature gage producer, determine to obtain compensation heating current I corresponding to Δ T
h;
The heating of c, heating makes temperature controller temperature indicating value rise, and stablizes after 45min and reads temperature controller temperature indicating value, be designated as T until thermometer indicating value
2;
D, the actual temperature rise Δ T=T of calculating temperature controller thermal cycle simulation under this heat test electric current
2-T
1, complete temperature rise test, also can carry out identical test to other heat test current values according to actual needs, to determine the temperature characteristic of heating under different heating electric current.
Claims (2)
1. a method for Transformer Winding temperature controller thermal cycle simulation temperature characteristic site test, comprises the following steps:
S1 keeps heating normal mounting in temperature controller thermometer bulb and thermal cycle simulation on the transformer, transformer stop transport reduce to consistent with environment temperature to its internal temperature time, read temperature controller temperature indicating value, be designated as T
1;
S2, according to the copper oil temperature difference parameters of transformer rated load current, current transformer ratio, Transformer Winding, calculates and determines test heating current I
hsize, and by constant-current source device, electric current is exported to temperature controller;
The heating of S3 heating makes temperature controller temperature indicating value rise, and after temperature controller temperature indicating value stablizes 45 minutes, reads this indicating value, is designated as T
2;
The heating current I that S4 temperature controller thermal cycle simulation is corresponding when transformer rated load current is I
hthe temperature rise produced
the i.e. temperature characteristic of temperature controller thermal cycle simulation;
Wherein K
ifor the coefficient relevant with transformer Cooling structure.
2. the method for Transformer Winding temperature controller thermal cycle simulation temperature characteristic site test according to claim 1, is characterized in that: determine the I in described step S2
hthe step of value is as follows:
The temperature rise data of this transformer that S2-1 provides according to transformer manufacturer, draw the copper oil temperature difference parameters Δ T ˊ of this transformer when full load;
S2-2, according to copper oil temperature difference parameters Δ T ˊ size, verifies the temperature characteristic curve map given by winding temperature controller producer, determines to obtain test heating current I corresponding to Δ T
h.
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| CN201310060960.2A CN103148965B (en) | 2013-02-26 | 2013-02-26 | Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller |
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| CN201310060960.2A CN103148965B (en) | 2013-02-26 | 2013-02-26 | Temperature rise characteristic field testing method of thermal simulation device of transformer winding temperature controller |
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| CN103148965B true CN103148965B (en) | 2015-03-18 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678980B (en) * | 2013-11-28 | 2017-11-07 | 国网河南省电力公司三门峡供电公司 | Transformer temperature controller check meter |
| CN104501980A (en) * | 2015-01-16 | 2015-04-08 | 成都城电电力工程设计有限公司 | Transformer winding temperature measuring device |
| CN104766515B (en) * | 2015-03-30 | 2017-10-24 | 西南交通大学 | A kind of experimental provision and its experimental method for simulating tractive transformer heat |
| CN104914361B (en) * | 2015-05-22 | 2017-11-17 | 国家电网公司 | A kind of method for differentiating transformer drop and holding deisgn product |
| CN106840461A (en) * | 2016-07-20 | 2017-06-13 | 国家电网公司 | A kind of transformer reactance device temperature protective device in-situ check and test method |
| CN108051105B (en) * | 2018-01-18 | 2023-08-01 | 广东电网有限责任公司电力科学研究院 | Experimental device for researching temperature distribution of transformer winding |
| CN110442118A (en) * | 2019-09-03 | 2019-11-12 | 郑州赛奥电子股份有限公司 | Winding temperature controller calibration equipment and its thermostatic bath system |
| CN111735556A (en) * | 2020-06-24 | 2020-10-02 | 大连世有电力科技有限公司 | Liquid thermal simulation device for transformer temperature controller based on optical fiber temperature measurement principle |
| CN112924786B (en) * | 2020-12-30 | 2022-05-03 | 广东电网有限责任公司电力科学研究院 | Method and device for testing temperature rise characteristic of thermal simulation device of transformer winding temperature controller |
| CN113552863B (en) * | 2021-08-11 | 2023-03-14 | 广西电网有限责任公司电力科学研究院 | Additional temperature rise calibrating device and method for transformer winding temperature controller |
| CN114200910A (en) * | 2021-11-29 | 2022-03-18 | 广西电网有限责任公司电力科学研究院 | Calibrating device and method for transformer winding temperature controller |
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| US8087825B2 (en) * | 2009-12-21 | 2012-01-03 | Weiss Instruments, Inc. | Mechanical and electronic temperature reading system with built-in failure and inaccuracy detection |
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| JPH08145801A (en) * | 1994-11-17 | 1996-06-07 | Kitashiba Denki Kk | Open-air-temperature correction-type dial thermometer |
| CN201885830U (en) * | 2010-12-07 | 2011-06-29 | 邢台供电公司 | Field checking instrument for transformer thermometer |
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| CN103148965A (en) | 2013-06-12 |
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Address after: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Patentee after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Address before: 510080 Dongfeng East Road, Guangdong, Guangzhou, water, Kong Kong, No. 8 Patentee before: Electrical Power Research Institute of Guangdong Power Grid Corporation |