CN102818656A - On-line monitoring system for temperature of transformer core - Google Patents

On-line monitoring system for temperature of transformer core Download PDF

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Publication number
CN102818656A
CN102818656A CN2012102917548A CN201210291754A CN102818656A CN 102818656 A CN102818656 A CN 102818656A CN 2012102917548 A CN2012102917548 A CN 2012102917548A CN 201210291754 A CN201210291754 A CN 201210291754A CN 102818656 A CN102818656 A CN 102818656A
Authority
CN
China
Prior art keywords
optical fiber
temperature
transformer core
transformer
core
Prior art date
Application number
CN2012102917548A
Other languages
Chinese (zh)
Inventor
王世有
Original Assignee
大连世有电力科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 大连世有电力科技有限公司 filed Critical 大连世有电力科技有限公司
Priority to CN2012102917548A priority Critical patent/CN102818656A/en
Publication of CN102818656A publication Critical patent/CN102818656A/en

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Abstract

The invention discloses an on-line monitoring system for the temperature of a transformer core. The on-line monitoring system is provided with at least three optical fiber temperature sensors (1) connected with the transformer core and an optical fiber through device (2) installed on a transformer housing, wherein each optical fiber temperature sensor (1) is respectively connected with an optical fiber (3), and the optical fiber (3) is connected with a microprocessor through the optical fiber through device (2). As the on-line monitoring system directly measures the temperature of the core, the accuracy is high, the core overheat can be detected in the first time and an alarm is given in time, and the safety problem generated due to the lagging alarming is avoided. Meanwhile, the specific location of a fault point can be determined, which facilitates maintenance.

Description

The transformer core temperature online monitoring system

Technical field

The present invention relates to a kind of transformer core temperature online monitoring system, especially a kind of can directly measurement the, high, the transformer core temperature online monitoring system timely, easy access of reporting to the police of degree of accuracy to the transformer core temperature.

Background technology

Power transformer can produce electric field around the winding when normal operation, hardwares such as iron core, folder are in the electric field, and in order to prevent to produce electric discharge phenomena, guarantee insulation, iron core must have some reliable grounds.If another earth point on iron core, occurs; Will form the closed-loop path, just have circulation on the lead-in wire of normal ground connection and produce, cause the iron core local overheating; To such an extent as to the iron core scaling loss occurs and produce discharge property fault; Therefore, accurately monitoring transformer core temperature is also in time reported to the police, to fix a breakdown.The method of monitoring for the transformer core temperature at present, has following several kinds basically: one is to use clamp on amperemeter to measure the electric current in the external ground wire of iron core; The 2nd, with gas chromatographic analysis transformer gas content of oil; Also have and a kind ofly exactly the oily temperature of transformer is measured.More than three kinds of methods be not directly to measure the iron core temperature, but the iron core temperature is inferred through indexs such as electric current, air content and oily temperature accuracy is not high respectively, warning relatively lags behind, and exists potential safety hazard.Even the discovery fault also is difficult to the particular location of confirming that fault takes place, be not easy to maintenance.

Summary of the invention

The present invention is in order to solve the above-mentioned technical matters of existing in prior technology, and providing a kind of can directly measure the transformer core temperature, and degree of accuracy is high, report to the police in time, the transformer core temperature online monitoring system of easy access.

Technical solution of the present invention is: a kind of transformer core temperature online monitoring system; Be provided with at least three optical fiber that are connected to the temperature detected by optical fiber sensor of transformer core and are installed on the transformer housing and connect device; Each temperature detected by optical fiber sensor joins with optical fiber respectively, and optical fiber connects device through optical fiber and microprocessor joins.

Be connected to the power current sensor that is arranged on the transformer core ground wire with microprocessor.

The present invention is provided with at least three temperature detected by optical fiber sensors on transformer core, the temperature signal that the temperature detected by optical fiber sensor is induced reaches microprocessor through optical fiber, and microprocessor can be through outwards transmission and the warning of wired or wireless interface.Owing to be the temperature of directly measuring iron core, not only degree of accuracy is high, and can in the very first time, detect the overheated and timely warning of iron core, avoids the safety problem that lags behind and occurred because of reporting to the police, also can confirm the particular location of fault origination point simultaneously, easy access.The present invention also can be provided with the power current sensor on the transformer core ground wire, complement each other with fibre optic temperature sensor, can further improve monitoring precision, guarantees for the electric power safety operation provides more reliably.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the invention.

Fig. 2 is the schematic block circuit diagram of the embodiment of the invention.

Embodiment

Below with accompanying drawings embodiment of the present invention.Like Fig. 1, shown in 2: be provided with three temperature detected by optical fiber sensors 1 (the first temperature detected by optical fiber sensor, the second temperature detected by optical fiber sensor and the 3rd temperature detected by optical fiber sensor) that are connected to transformer core 5; Temperature detected by optical fiber sensor 1 be distributed in transformer core 5 each go up mutually; Can when transformer is made, it be embedded in the iron core surface; The optical fiber that equates with temperature detected by optical fiber sensor 1 quantity is installed on transformer housing 6 simultaneously connects device 2; It is fiber connector that optical fiber connects device 2, can connect optical fiber and can prevent that transformer oil from spilling.Each temperature detected by optical fiber sensor 1 joins with optical fiber 3 respectively, and optical fiber 3 connects device 2 through optical fiber again and joins with microprocessor.The temperature signal that temperature detected by optical fiber sensor 1 is responded to reaches microprocessor after through processing such as amplification corrections, and microprocessor can be through the outside transmission signals and start warning circuit of wireline interface (R485, R232 etc.) or wave point (Wi-Fi, GPRS etc.).Can realize three-dimensional localization through at least three temperature detected by optical fiber sensors, the position of the localization of faults, easy access.In order further to improve the monitoring degree of accuracy, also be connected to the power current sensor 4 that is arranged on the transformer core ground wire 7 with microprocessor, the electric current on the monitoring grounding wire complements each other with fibre optic temperature sensor in real time.

Claims (2)

1. transformer core temperature online monitoring system; It is characterized in that: be provided with at least three optical fiber that are connected to the temperature detected by optical fiber sensor (1) of transformer core and are installed on the transformer housing and connect device (2); Each temperature detected by optical fiber sensor (1) joins with optical fiber (3) respectively, and optical fiber (3) connects device (2) through optical fiber and joins with microprocessor.
2. transformer core temperature online monitoring system according to claim 1 is characterized in that: be connected to the power current sensor (4) that is arranged on the transformer core ground wire with microprocessor.
CN2012102917548A 2012-08-16 2012-08-16 On-line monitoring system for temperature of transformer core CN102818656A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012102917548A CN102818656A (en) 2012-08-16 2012-08-16 On-line monitoring system for temperature of transformer core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012102917548A CN102818656A (en) 2012-08-16 2012-08-16 On-line monitoring system for temperature of transformer core

Publications (1)

Publication Number Publication Date
CN102818656A true CN102818656A (en) 2012-12-12

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Family Applications (1)

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CN2012102917548A CN102818656A (en) 2012-08-16 2012-08-16 On-line monitoring system for temperature of transformer core

Country Status (1)

Country Link
CN (1) CN102818656A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103557962A (en) * 2013-11-14 2014-02-05 哈尔滨电机厂有限责任公司 Hydro-generator confluence copper ring temperature rise distribution on-line monitoring system
WO2014206001A1 (en) * 2013-06-28 2014-12-31 国网山西省电力公司太原供电公司 Method for controlling load of transformer based on hot spot temperature measured by using fibre grating technology

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101949744A (en) * 2010-09-06 2011-01-19 国网电力科学研究院武汉南瑞有限责任公司 Fiber grating-based transformer internal temperature detection system
CN101975881A (en) * 2010-08-25 2011-02-16 太原理工大学 Diagnosis and early warning device of faults of mine explosion-proof dry type transformers
CN201852564U (en) * 2010-01-12 2011-06-01 武汉烽火富华电气有限责任公司 Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding
CN202793642U (en) * 2012-08-16 2013-03-13 大连世有电力科技有限公司 Transformer iron core temperature on-line monitoring system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201852564U (en) * 2010-01-12 2011-06-01 武汉烽火富华电气有限责任公司 Distributed optical fiber on-line monitoring system for deformation and temperature of transformer winding
CN101975881A (en) * 2010-08-25 2011-02-16 太原理工大学 Diagnosis and early warning device of faults of mine explosion-proof dry type transformers
CN101949744A (en) * 2010-09-06 2011-01-19 国网电力科学研究院武汉南瑞有限责任公司 Fiber grating-based transformer internal temperature detection system
CN202793642U (en) * 2012-08-16 2013-03-13 大连世有电力科技有限公司 Transformer iron core temperature on-line monitoring system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014206001A1 (en) * 2013-06-28 2014-12-31 国网山西省电力公司太原供电公司 Method for controlling load of transformer based on hot spot temperature measured by using fibre grating technology
CN103557962A (en) * 2013-11-14 2014-02-05 哈尔滨电机厂有限责任公司 Hydro-generator confluence copper ring temperature rise distribution on-line monitoring system

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Application publication date: 20121212

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