CN105137302A - Transformer partial discharge on-line monitoring system based on optical fiber - Google Patents

Transformer partial discharge on-line monitoring system based on optical fiber Download PDF

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Publication number
CN105137302A
CN105137302A CN201510576029.9A CN201510576029A CN105137302A CN 105137302 A CN105137302 A CN 105137302A CN 201510576029 A CN201510576029 A CN 201510576029A CN 105137302 A CN105137302 A CN 105137302A
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CN
China
Prior art keywords
line monitoring
partial discharge
transformer
monitoring system
optical fiber
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201510576029.9A
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Chinese (zh)
Inventor
孙晓凡
罗涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PHOIBOS TECHNOLOGY Co Ltd
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PHOIBOS TECHNOLOGY Co Ltd
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 PHOIBOS TECHNOLOGY Co Ltd filed Critical PHOIBOS TECHNOLOGY Co Ltd
Priority to CN201510576029.9A priority Critical patent/CN105137302A/en
Publication of CN105137302A publication Critical patent/CN105137302A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a transformer partial discharge on-line monitoring system based on an optical fiber. The transformer partial discharge on-line monitoring system is characterized in that the transformer partial discharge on-line monitoring system comprises a monitoring center, a monitoring control module, a anti-interference adjusting system, an optical fiber current sensor, an optical analyzer, a signal processing unit, a digital sampling module and a diagnosis unit; the monitoring center is provided with a main server, a human-computer interface and an industrial control computer; and the main server is connected with the human-computer interface, the industrial control computer and the monitoring control module arranged on a transformer end. The transformer partial discharge on-line monitoring system is capable of realizing on-line monitoring, the test time is short, the damages caused by power cut operation to equipment are reduced, the optical fiber current sensor is adopted, and the system has the advantages that a wide measuring range from a low frequency to a high frequency and from a weak current to a heavy current is realized, the waveform distortion is small and the transmission loss is low, so that long-distance signal transmission is realized, the installation is easy, and the lightweight of the whole sensing device is realized.

Description

Based on the partial discharge of transformer on-line monitoring system of optical fiber
Technical field
The present invention relates to electrical equipment monitoring technical field, specifically a kind of partial discharge of transformer on-line monitoring system based on optical fiber.
Background technology
Along with the overall fast development to bulk power grid, large-sized unit, high power capacity of power industry, more and more higher technical requirement is proposed to the real-time grasp of critical electrical equipment running status.Insulation life will be affected during partial discharge of transformer, each electric discharge, the impact of high-energy electron or acceleration electronics, particularly long-term shelf depreciation effect all can cause physical influence and the chemical reaction of various ways, during as charging point shock bubble outer wall, just may interrupt the chemical bond of insulation and cracking occurs, destroying the molecular structure of insulation, cause insulation degradation, accelerate insulation damages process.The fault of power transformer is most to be caused due to failure of insulation, and existing maintenance and insulation preventive trial system have the following disadvantages: a, test condition and service condition have difference, and off-line testing can not reflect equipment insulation status in operating conditions completely; Though b, insulation fault have evolution, speed of development differs widely, and catastrophic discontinuityfailure occupies sizable proportion in EHV transformer accident; C, periodic maintenance and insulation preventive trial all need power failure off-line to carry out, and test period is long, and workload is large, also may cause equipment damage.And although current High Frequency Current Sensor pulse resolution is high, the life-span is long, heavier, take up room large, trouble is installed.Solve the problem so need a kind of partial discharge of transformer on-line monitoring system based on optical fiber badly.
Summary of the invention
Not enough for above-mentioned prior art, the invention provides a kind of partial discharge of transformer on-line monitoring system based on optical fiber.
Partial discharge of transformer on-line monitoring system based on optical fiber provided by the invention is achieved through the following technical solutions:
A kind of partial discharge of transformer on-line monitoring system based on optical fiber, it is characterized in that: comprise Surveillance center, Monitoring and Controlling module, anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit, described Surveillance center arranges master server, man-machine interface, industrial computer, described master server respectively with man-machine interface, industrial computer and the Monitoring and Controlling model calling being positioned at transformer terminal, described anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit is all arranged on transformer terminal, described Monitoring and Controlling module respectively with anti-interference regulating system optical analyser, signal processing unit, digital sample module, diagnosis unit connects, described optical analyser and fibre optic current sensor pass through Fiber connection.
Described on-line monitoring system adopts industrial RS485 bus interface.
The invention has the beneficial effects as follows:
1, can realize on-line monitoring, test period is short, decreases the infringement of power failure operation to equipment;
2, fibre optic current sensor is adopted, fibre optic current sensor is wide without the interference measurement scope of electromagnetic noise, there is no magnetically saturated restriction unshakable in one's determination, simultaneously, the fast response time of Faraday effect, have from low to high, to big current wide measurement model a side gate of an imperial palace, wave form distortion is little, loss is little, antijamming capability is strong, therefore the Signal transmissions of long distance can be realized, and easily install, without break line during installation, only elongated, soft insulating optical fiber is wound on conductor and just can detects electric current, realize the minor benefit lightweight of whole sensing device;
3, monitor signal carries out data conversion at the scene, by digital signal, data are sent to Surveillance center, eliminate the undesired signal of long range propagation coupling, cable consumption is little, easy construction, reliability are high, antijamming capability is strong, accurately can determine size and the position relationship of shelf depreciation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
A kind of partial discharge of transformer on-line monitoring system based on optical fiber as shown in Figure 1, it is characterized in that: comprise Surveillance center, Monitoring and Controlling module, anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit, described Surveillance center arranges master server, man-machine interface, industrial computer, described master server respectively with man-machine interface, industrial computer and the Monitoring and Controlling model calling being positioned at transformer terminal, described anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit is all arranged on transformer terminal, described Monitoring and Controlling module respectively with anti-interference regulating system optical analyser, signal processing unit, digital sample module, diagnosis unit connects, described optical analyser and fibre optic current sensor pass through Fiber connection.
Further, described on-line monitoring system adopts industrial RS485 bus interface.
Transformer starts moment in electric discharge, and the two ends of winding just there will be the electric capacity transmission component that shelf depreciation steep-sided pulse corresponds to capacitance network district.By this component, and find the corresponding relation of position on two capacitive components and winding, just can measure accurately and determine the size of shelf depreciation and position occurs.
The above embodiment only represents embodiments of the present invention, and it describes comparatively concrete and detailed, but can not be interpreted as limitation of the scope of the invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to scope.

Claims (2)

1. the partial discharge of transformer on-line monitoring system based on optical fiber, it is characterized in that: comprise Surveillance center, Monitoring and Controlling module, anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit, described Surveillance center arranges master server, man-machine interface, industrial computer, described master server respectively with man-machine interface, industrial computer and the Monitoring and Controlling model calling being positioned at transformer terminal, described anti-interference regulating system, fibre optic current sensor, optical analyser, signal processing unit, digital sample module, diagnosis unit is all arranged on transformer terminal, described Monitoring and Controlling module respectively with anti-interference regulating system optical analyser, signal processing unit, digital sample module, diagnosis unit connects, described optical analyser and fibre optic current sensor pass through Fiber connection.
2. the partial discharge of transformer on-line monitoring system based on optical fiber according to claim 1, is characterized in that: described on-line monitoring system adopts industrial RS485 bus interface.
CN201510576029.9A 2015-09-11 2015-09-11 Transformer partial discharge on-line monitoring system based on optical fiber Pending CN105137302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510576029.9A CN105137302A (en) 2015-09-11 2015-09-11 Transformer partial discharge on-line monitoring system based on optical fiber

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Application Number Priority Date Filing Date Title
CN201510576029.9A CN105137302A (en) 2015-09-11 2015-09-11 Transformer partial discharge on-line monitoring system based on optical fiber

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CN105137302A true CN105137302A (en) 2015-12-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110596557A (en) * 2019-10-18 2019-12-20 国网江苏省电力有限公司盐城供电分公司 Partial discharge remote detection system based on optical fiber transmission and detection method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201589842U (en) * 2010-02-03 2010-09-22 山东电力研究院 Local discharging optical fiber detection device of transformer
CN103869224A (en) * 2014-03-03 2014-06-18 国家电网公司 Capacitive equipment partial discharge detection method based on optical fiber current sensor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201589842U (en) * 2010-02-03 2010-09-22 山东电力研究院 Local discharging optical fiber detection device of transformer
CN103869224A (en) * 2014-03-03 2014-06-18 国家电网公司 Capacitive equipment partial discharge detection method based on optical fiber current sensor

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
唐炬等: "用于检测变压器局部放电的荧光光纤传感系统研制", 《高电压技术》 *
杜伯学等: "基于光学电流传感器的局部放电检测", 《电力系统自动化》 *
肖登明等: "一种用于电力变压器局部放电在线监测的光纤传感器", 《电力设备》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110596557A (en) * 2019-10-18 2019-12-20 国网江苏省电力有限公司盐城供电分公司 Partial discharge remote detection system based on optical fiber transmission and detection method thereof

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Application publication date: 20151209

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