CN204495898U - A kind of transformer superpotential on-line monitoring system - Google Patents

A kind of transformer superpotential on-line monitoring system Download PDF

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Publication number
CN204495898U
CN204495898U CN201520066688.3U CN201520066688U CN204495898U CN 204495898 U CN204495898 U CN 204495898U CN 201520066688 U CN201520066688 U CN 201520066688U CN 204495898 U CN204495898 U CN 204495898U
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China
Prior art keywords
transformer
superpotential
line monitoring
monitoring system
current sensor
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CN201520066688.3U
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Chinese (zh)
Inventor
黄辉
瞿卫东
陆忠心
徐飞
王月强
龚春彬
杨雷
李军浩
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State Grid Shanghai Electric Power Co Ltd
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State Grid Shanghai Electric Power Co Ltd
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Abstract

A kind of transformer superpotential on-line monitoring system, it is connected with transformer, and described on-line monitoring system comprises: neutral-point connecting wire, and its input end connects the three-phase neutral point of described transformer; Neutral point MOA, its input end connects the output terminal of described neutral-point connecting wire, and its output terminal is by arrester ground downlead ground connection; Current sensor, it is enclosed within outside described arrester ground downlead, for responding to the overvoltage signal of described neutral point MOA; Monitoring module, its connect described in current sensor, for gathering the overvoltage signal of neutral point MOA that display current sensor senses.Its advantage is: it carries out superpotential on-line monitoring based on neutral point MOA working current to transformer, convenient and safe and reliable.

Description

A kind of transformer superpotential on-line monitoring system
Technical field
The utility model relates to technical field of electric power detection, is specifically related to a kind of transformer superpotential on-line monitoring system.
Background technology
Along with the development of national economy, more and more higher to the requirement of electric system reliability service, power transformer is the key equipment in electrical network, transformer can suffer various types of superpotential in operational process, study transformer insulated characteristic when superpotential that transformer bears is detected, carry out the key measure of transformer overvoltage protection.
How to be detected transformer station's superpotential by condenser type or voltage transformer (VT) in the research of prior art, this method effectively can realize the superpotential detection of transformer station, but the superpotential be difficult to transformer itself bears detects; Such as carried out the method for Zenith tracking in addition by Transformer Bushing Tap, but this method needs bottom shielding of bushing to take apart, is unfavorable for the safe operation of transformer like this; Therefore, need to study a kind of safe and reliable transformer superpotential on-line monitoring system, this safe operation for transformer is significant.
Utility model content
The purpose of this utility model is to provide a kind of transformer superpotential on-line monitoring system, and what it can be safe and reliable carries out on-line monitoring to transformer superpotential.
In order to achieve the above object, the utility model is achieved through the following technical solutions:
A kind of transformer superpotential on-line monitoring system, it is connected with transformer, it is characterized in that, described on-line monitoring system comprises:
Neutral-point connecting wire, its input end connects the three-phase neutral point of described transformer;
Neutral point MOA, its input end connects the output terminal of described neutral-point connecting wire, and its output terminal is by arrester ground downlead ground connection;
Current sensor, it is enclosed within outside described arrester ground downlead, for responding to the overvoltage signal of described neutral point MOA;
Monitoring module, its connect described in current sensor, for gathering the overvoltage signal of neutral point MOA that display current sensor senses.
Above-mentioned transformer superpotential on-line monitoring system, wherein, described monitoring module comprises:
Signal cable, its input end connects described current sensor;
Oscillograph, its input end connects the output terminal of described signal cable.
Above-mentioned transformer superpotential on-line monitoring system, wherein:
Described oscillograph adopts Tyke 4054 oscillograph.
Above-mentioned transformer superpotential on-line monitoring system, wherein:
The frequency span of described current sensor is 0 ~ 10MHz.
Above-mentioned transformer superpotential on-line monitoring system, wherein:
The amplitude range of described current sensor is 0 ~ 2000A.
The utility model compared with prior art has the following advantages: it carries out superpotential on-line monitoring based on neutral point MOA working current to transformer, convenient and safe and reliable.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the utility model is further elaborated.
As shown in Figure 1, a kind of transformer superpotential on-line monitoring system, it is connected with transformer, and described on-line monitoring system comprises: neutral-point connecting wire 1, and its input end connects the three-phase neutral point of described transformer; Neutral point MOA 2, its input end connects the output terminal of described neutral-point connecting wire 1, and its output terminal is by arrester ground downlead 3 ground connection; Current sensor 4, it is enclosed within outside described arrester ground downlead 3, for responding to the overvoltage signal of described neutral point MOA 2; Monitoring module, its connect described in current sensor 4, for gathering the overvoltage signal of neutral point MOA 2 that display current sensor 4 senses.
Described monitoring module comprises: signal cable 5, and its input end connects described current sensor 4; Oscillograph 6, its input end connects the output terminal of described signal cable 5.
Described oscillograph 6 adopts Tyke 4054 oscillograph.
The frequency span of described current sensor 4 is 0 ~ 10MHz; The amplitude range of described current sensor 4 is 0 ~ 2000A.
This transformer superpotential on-line monitoring system adopts the mode of Three-Phase Transformer isolated neutral, in order to prevent superpotential, neutral point MOA 2 is adopted to be connected with the earth by neutral point, once transformer suffers superpotential, superpotential is conducting to the earth by neutral point MOA 2, and now neutral point MOA 2 meeting action, can by this action current in arrester ground downlead 3, this action current carries out sensing by current sensor 4, accesses oscillograph 6 carry out collection display by signal cable 5.During normal operation, oscillograph 6 is in waiting status, once there be letter to enter well, namely oscillograph 6 gathers and show superpotential believes.
Although content of the present utility model has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple amendment of the present utility model and substitute will be all apparent.Therefore, protection domain of the present utility model should be limited to the appended claims.

Claims (5)

1. a transformer superpotential on-line monitoring system, it is connected with transformer, it is characterized in that, described on-line monitoring system comprises:
Neutral-point connecting wire (1), its input end connects the three-phase neutral point of described transformer;
Neutral point MOA (2), its input end connects the output terminal of described neutral-point connecting wire (1), and its output terminal is by arrester ground downlead (3) ground connection;
Current sensor (4), it is enclosed within described arrester ground downlead (3) outward, for responding to the overvoltage signal of described neutral point MOA (2);
Monitoring module, its connect described in current sensor (4), for gathering the overvoltage signal of neutral point MOA (2) that display current sensor (4) senses.
2. transformer superpotential on-line monitoring system as claimed in claim 1, it is characterized in that, described monitoring module comprises:
Signal cable (5), its input end connects described current sensor (4);
Oscillograph (6), its input end connects the output terminal of described signal cable (5).
3. transformer superpotential on-line monitoring system as claimed in claim 2, is characterized in that:
Described oscillograph (6) adopts Tyke 4054 oscillograph.
4. transformer superpotential on-line monitoring system as claimed in claim 1, is characterized in that:
The frequency span of described current sensor (4) is 0 ~ 10MHz.
5. transformer superpotential on-line monitoring system as claimed in claim 4, is characterized in that:
The amplitude range of described current sensor (4) is 0 ~ 2000A.
CN201520066688.3U 2015-01-30 2015-01-30 A kind of transformer superpotential on-line monitoring system Active CN204495898U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520066688.3U CN204495898U (en) 2015-01-30 2015-01-30 A kind of transformer superpotential on-line monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520066688.3U CN204495898U (en) 2015-01-30 2015-01-30 A kind of transformer superpotential on-line monitoring system

Publications (1)

Publication Number Publication Date
CN204495898U true CN204495898U (en) 2015-07-22

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107024631A (en) * 2017-05-27 2017-08-08 国网上海市电力公司 With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device
CN107064694A (en) * 2017-05-27 2017-08-18 国网上海市电力公司 No-load test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107167710A (en) * 2017-05-27 2017-09-15 国网上海市电力公司 Pressure test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107167683A (en) * 2017-05-27 2017-09-15 国网上海市电力公司 Load test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107422201A (en) * 2017-05-27 2017-12-01 国网上海市电力公司 A kind of Multifunctional coil kind equipment testing synthesis parameter device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107024631A (en) * 2017-05-27 2017-08-08 国网上海市电力公司 With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device
CN107064694A (en) * 2017-05-27 2017-08-18 国网上海市电力公司 No-load test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107167710A (en) * 2017-05-27 2017-09-15 国网上海市电力公司 Pressure test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107167683A (en) * 2017-05-27 2017-09-15 国网上海市电力公司 Load test method based on Multifunctional coil kind equipment testing synthesis parameter device
CN107422201A (en) * 2017-05-27 2017-12-01 国网上海市电力公司 A kind of Multifunctional coil kind equipment testing synthesis parameter device

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