CN203117299U - Integrative sensor for monitoring dielectric loss of power transformer bushing - Google Patents
Integrative sensor for monitoring dielectric loss of power transformer bushing Download PDFInfo
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- CN203117299U CN203117299U CN2013201032000U CN201320103200U CN203117299U CN 203117299 U CN203117299 U CN 203117299U CN 2013201032000 U CN2013201032000 U CN 2013201032000U CN 201320103200 U CN201320103200 U CN 201320103200U CN 203117299 U CN203117299 U CN 203117299U
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- current sensor
- connecting rod
- transformer
- flexible connecting
- dielectric loss
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Abstract
The utility model discloses an integrative sensor for monitoring dielectric loss of a power transformer bushing. The integrative sensor for monitoring the dielectric loss of the power transformer bushing comprises a transformer bushing, an end screen adapter and an electric current sensor. The size of the end screen adapter is matched with the size of the electric current sensor. The electric current sensor is fixed on an end screen of the transformer bushing through the end screen adapter, a metal leading-out rod which leads out leakage current quantity of the transformer bushing is arranged on the end screen of the transformer bushing. An elastic connecting rod is arranged on the metal leading-out rod in the axial direction. The metal leading-out rod is connected into the electric current sensor through the elastic connecting rod. The electric current sensor collects the size and the phase of leakage current of the transformer bushing, and then the dielectric loss of the transformer bushing can be calculated. By the adoption of an integrative structure of the end screen adapter and the electric current sensor, the electric current sensor monitors the magnitude of current of the elastic connecting rod, and then the dielectric loss of the transformer bushing can be known, safety of an original connection mode is retained, and the problems that ground lead is too long to increase ground connection inductive reactance, and monitoring data are inaccurate are solved.
Description
Technical field
The utility model relates to a kind of for the current sensor that power transformer sleeve pipe electrical leakage quantity is carried out field monitoring, especially the current sensor that is wholely set with transformer.
Background technology
The state of insulation of power equipment is most important to the safe operation of electric system, some the impaired accidents that cause exploding of bushing shell for transformer insulation had taken place in power industry in recent years, the situation of bushing shell for transformer safe operation is very severe, in case generation bushing explosion, will cause enormous economic loss, operations staff's personal safety is also caused great threat.Traditional regular preventive trial is continued to use in electric system for a long time, detects the defective of high voltage electric equipment, because preventive trial voltage is well below actual motion voltage, intertrial interval is longer, often is difficult to the discovering device insulation defect.The insulation of electrical installation on-line monitoring technique is under the condition of not influence equipment operation, and status of equipment is monitored continuously or regularly, and on-line monitoring is the important supplement to preventive trial.The insulated on-line monitoring technology now has been widely used in high pressure equipment such as the lightning arrester, mutual inductor, GIS switch of AC Substation, achieves noticeable achievement.
When under the running status to power transformer, monitoring, require the installation site of monitoring sensor and the work that mode all can not influence transformer itself, usually current sensor is installed on the end screen line of bushing shell for transformer, its mounting means is single turn core type, transformer is provided with a metal leading-off rods at its bottom shielding of bushing end, end screen ground wire is drawn by the metal leading-off rods by an adapter, insert current sensor by the metal leading-off rods by external connection again, then ground connection is shielded the impaired state of how much judging bushing shell for transformer of the magnitude of current of ground wire by measuring the end.There are two problems in this mode, and the one, because current sensor is that independent component will be drawn long ground wire, increased ground connection induction reactance; The 2nd, end screen outlet has a segment distance to the feedthrough hole of sensor, and this segment distance can be introduced many electromagnetic interference (EMI), has increased the signal to noise ratio (S/N ratio) of gathering signal, makes data distortion.
The utility model content
At problems of the prior art, the utility model provides adapter and the integrated structure of current sensor has been shielded in the end, make current sensor by monitoring the magnitude of current on the flexible connecting rod, and then learn the dielectric loss of bushing shell for transformer, the magnitude of current more lossy is more serious, both keep the security of the former mode of connection, solved the long increase of ground wire ground connection induction reactance and the inaccurate problem of Monitoring Data again.
To achieve these goals, a kind of integrated transducer of monitoring power transformer sleeve pipe dielectric loss of the utility model, comprise bushing shell for transformer, end screen adapter and current sensor, described end screen adapter and described current sensor size are complementary, current sensor is fixed on the end screen of described bushing shell for transformer by end screen adapter, the end screen of bushing shell for transformer is provided with the metal leading-off rods of drawing the bushing shell for transformer electrical leakage quantity, described metal leading-off rods axially be provided with flexible connecting rod, insert current sensor by described flexible connecting rod, gather size and the phase place of the leakage current of bushing shell for transformer by current sensor, and then can calculate the dielectric loss of bushing shell for transformer.
Further, the described current sensor outside is covered with metal shell, the front end of described flexible connecting rod is nested with on described metal leading-off rods, axially be provided with first spring between flexible connecting rod and the metal leading-off rods, the end of flexible connecting rod passes current sensor and leans on described metal shell inwall by second spring, metal shell ground connection is made of the ground path of bushing shell for transformer metal leading-off rods, first spring, flexible connecting rod, second spring and metal shell.
Further, described flexible connecting rod is provided with and prevents that flexible connecting rod is along the spline part of axis rotation.
Further, described metal shell is provided with the water joint of drawing for the signal wire of described current sensor.
Further, described metal shell is provided with the bonnet of the described current sensor of easy access, and described bonnet is removably mounted on the metal shell by screw, and described second spring leans on bonnet.
Further, described flexible connecting rod is provided with connecting line, one end of described connecting line removably is connected the end of flexible connecting rod, the other end is connected on the inwall of described metal shell, is made of the ground connection insurance circuit of bushing shell for transformer described metal leading-off rods, described first spring, flexible connecting rod, connecting line and metal shell.
The utility model shields adapter and current sensor at the fixing end of transformer, and makes its integrated connection, has shortened original ground wire, and simultaneously, flexible connecting rod directly inserts in the current sensor, makes Monitoring Data more accurate.
Description of drawings
Fig. 1 is a kind of structural representation of monitoring the integrated transducer of power transformer sleeve pipe dielectric loss of the utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.
As shown in Figure 1, monitor the specific embodiment of the integrated transducer of power transformer sleeve pipe dielectric loss for the utility model is a kind of, comprise bushing shell for transformer 1, end screen adapter 2 and current sensor 3, current sensor 3 outsides are covered with metal shell 4, end screen adapter 2 is complementary with current sensor 3 sizes, current sensor 3 is fixed on the end screen of bushing shell for transformer 1 by end screen adapter 2, the end screen of bushing shell for transformer 1 is provided with the metal leading-off rods 12 of drawing the bushing shell for transformer electrical leakage quantity, because existing metal leading-off rods 12 is generally short, need to prolong and to insert in the current sensor 3, so axially be provided with flexible connecting rod 10 at metal leading-off rods 12, insert current sensor 3 by flexible connecting rod 10, the front end of flexible connecting rod 10 is nested with on metal leading-off rods 12, axially be provided with between flexible connecting rod 10 and the metal leading-off rods 12 first spring, 11, the first springs 11 be used for guaranteeing flexible connecting rod 10 with 12 safe and reliable connections of metal leading-off rods; The end of flexible connecting rod 10 passes current sensor 3 and leans on metal shell 4 inwalls by second spring 8, metal shell 4 ground connection are made of the ground path of bushing shell for transformer metal leading-off rods 12, first spring 11, flexible connecting rod 10, second spring 8 and metal shell 4.Flexible connecting rod 10 is provided with connecting line 13, one end of connecting line 13 removably is connected the end of flexible connecting rod 10, the other end is connected on the inwall of metal shell 4, the ground connection that is made of bushing shell for transformer metal leading-off rods 12, first spring 11, flexible connecting rod 10, connecting line 13 and metal shell 4 is insured circuit, constitutes the ground connection dual fail-safe thus.Metal shell 4 is provided with signal wire 6 water joint 5 of drawing of power supply flow sensor 3.Also be provided with on the metal shell 4 and be convenient to the bonnet 7 that the staff overhauls current sensor 3, bonnet 7 is removably mounted on the metal shell 4 by screw, and second spring 8 leans on bonnet 7.Flexible connecting rod 10 inserts current sensor 3, gathered the leakage current of bushing shell for transformer 1 by current sensor 3, according to the size in the leakage current and phase place, can calculate electric capacity and the dielectric loss value of bushing shell for transformer, and then learn the quality of the insulating property state of bushing shell for transformer.
Above-mentioned example just is used for explanation the utility model, and embodiment of the present utility model is not limited to these examples, and the various embodiments that meet the utility model thought that those skilled in the art make are all within protection domain of the present utility model.
Claims (6)
1. integrated transducer of monitoring power transformer sleeve pipe dielectric loss, it is characterized in that, comprise bushing shell for transformer, end screen adapter and current sensor, described end screen adapter and described current sensor size are complementary, current sensor is fixed on the end screen of described bushing shell for transformer by end screen adapter, the end screen of bushing shell for transformer is provided with the metal leading-off rods of drawing the bushing shell for transformer electrical leakage quantity, described metal leading-off rods axially be provided with flexible connecting rod, insert current sensor by described flexible connecting rod, gather size and the phase place of the leakage current of bushing shell for transformer by current sensor, and then can calculate the dielectric loss of bushing shell for transformer.
2. the integrated transducer of monitoring power transformer sleeve pipe dielectric loss as claimed in claim 1, it is characterized in that, the described current sensor outside is covered with metal shell, the front end of described flexible connecting rod is nested with on described metal leading-off rods, axially be provided with first spring between flexible connecting rod and the metal leading-off rods, the end of flexible connecting rod passes current sensor and leans on described metal shell inwall by second spring, metal shell ground connection is by the metal leading-off rods, first spring, flexible connecting rod, second spring and metal shell constitute the ground path of bushing shell for transformer.
3. the integrated transducer of monitoring power transformer sleeve pipe dielectric loss as claimed in claim 2 is characterized in that, described flexible connecting rod is provided with and prevents that flexible connecting rod is along the spline part of axis rotation.
4. the integrated transducer of monitoring power transformer sleeve pipe dielectric loss as claimed in claim 2 is characterized in that, described metal shell is provided with the water joint of drawing for the signal wire of described current sensor.
5. the integrated transducer of monitoring power transformer sleeve pipe dielectric loss as claimed in claim 2 is characterized in that described metal shell is provided with the bonnet of the described current sensor of easy access, and described second spring leans on described bonnet.
6. the integrated transducer of monitoring power transformer sleeve pipe dielectric loss as claimed in claim 2, it is characterized in that, described flexible connecting rod is provided with connecting line, one end of described connecting line removably is connected the end of flexible connecting rod, the other end is connected on the inwall of described metal shell, is made of the ground connection insurance circuit of bushing shell for transformer described metal leading-off rods, described first spring, flexible connecting rod, connecting line and metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201032000U CN203117299U (en) | 2013-03-07 | 2013-03-07 | Integrative sensor for monitoring dielectric loss of power transformer bushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201032000U CN203117299U (en) | 2013-03-07 | 2013-03-07 | Integrative sensor for monitoring dielectric loss of power transformer bushing |
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| Publication Number | Publication Date |
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| CN203117299U true CN203117299U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201032000U Expired - Fee Related CN203117299U (en) | 2013-03-07 | 2013-03-07 | Integrative sensor for monitoring dielectric loss of power transformer bushing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841869A (en) * | 2017-02-13 | 2017-06-13 | 河北智恒电力科技有限公司 | Bushing sensor and its test method |
| CN107219489A (en) * | 2016-08-31 | 2017-09-29 | 广州供电局有限公司 | Monitor Intelligent current transformer on-line |
| CN107229030A (en) * | 2016-08-31 | 2017-10-03 | 广州供电局有限公司 | Monitor Intelligent current transformer on-line |
| CN110196350A (en) * | 2019-05-17 | 2019-09-03 | 国网陕西省电力公司电力科学研究院 | Bottom shielding of bushing earthing or grounding means, leakage current collection system and method |
| RU195641U1 (en) * | 2019-09-17 | 2020-02-03 | Акционерное общество энергетики и электрификации "Тюменьэнерго" (АО "Тюменьэнерго") | Device for monitoring the state of insulation of a high voltage input |
| CN110988493A (en) * | 2019-12-31 | 2020-04-10 | 湖南慧眼电力智能监测设备有限公司 | On-line monitoring intelligent capacitive high-voltage electrical equipment |
| RU2730391C1 (en) * | 2019-09-23 | 2020-08-21 | Акционерное общество "РОССЕТИ ТЮМЕНЬ" (АО "РОССЕТИ ТЮМЕНЬ") | Insulation method of high-voltage input |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
-
2013
- 2013-03-07 CN CN2013201032000U patent/CN203117299U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219489A (en) * | 2016-08-31 | 2017-09-29 | 广州供电局有限公司 | Monitor Intelligent current transformer on-line |
| CN107229030A (en) * | 2016-08-31 | 2017-10-03 | 广州供电局有限公司 | Monitor Intelligent current transformer on-line |
| CN106841869A (en) * | 2017-02-13 | 2017-06-13 | 河北智恒电力科技有限公司 | Bushing sensor and its test method |
| CN110196350A (en) * | 2019-05-17 | 2019-09-03 | 国网陕西省电力公司电力科学研究院 | Bottom shielding of bushing earthing or grounding means, leakage current collection system and method |
| RU195641U1 (en) * | 2019-09-17 | 2020-02-03 | Акционерное общество энергетики и электрификации "Тюменьэнерго" (АО "Тюменьэнерго") | Device for monitoring the state of insulation of a high voltage input |
| RU2730391C1 (en) * | 2019-09-23 | 2020-08-21 | Акционерное общество "РОССЕТИ ТЮМЕНЬ" (АО "РОССЕТИ ТЮМЕНЬ") | Insulation method of high-voltage input |
| CN110988493A (en) * | 2019-12-31 | 2020-04-10 | 湖南慧眼电力智能监测设备有限公司 | On-line monitoring intelligent capacitive high-voltage electrical equipment |
| CN112731075A (en) * | 2020-12-17 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
| CN112731075B (en) * | 2020-12-17 | 2022-04-29 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent sleeve with integrated structure built in sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20180307 |