CN201278304Y - Anti-interference electric transformer on-line monitoring local discharging - Google Patents
Anti-interference electric transformer on-line monitoring local discharging Download PDFInfo
- Publication number
- CN201278304Y CN201278304Y CNU2008200724658U CN200820072465U CN201278304Y CN 201278304 Y CN201278304 Y CN 201278304Y CN U2008200724658 U CNU2008200724658 U CN U2008200724658U CN 200820072465 U CN200820072465 U CN 200820072465U CN 201278304 Y CN201278304 Y CN 201278304Y
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- China
- Prior art keywords
- sensor
- large sensor
- transformer
- grounding line
- bushing
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a power transformer capable of preventing interference, on- line monitoring partial discharging, belonging to the technical field of power supply devices. The power transformer comprises a transformer shell, a bushing, a signal receiver and a crate. An end screen grounding line is connected between the bushing and the shell, a magnetic core type current large sensor is sleeved with a flange of the bushing, a magnetic core type current small sensor is sleeved on the end screen grounding line, a coil of the large sensor and a coil of the small sensor are respectively connected with the crate, and an outer sheath of the large sensor is connected with the grounding line. When the power transformer works, the large sensor shields space impurity electrical signals, end screen discharge signals are obtained by the small sensor, and the outer sheath of the large sensor is connected with the grounding line to guarantee that no suspension potential exists for the sensor. The utility model can efficiently prevent interference of impurity signals, obtains accurate discharge signals of the transformer, and has reliable working performance.
Description
Technical field:
The utility model belongs to the electric supply installation technical field, is a kind of power transformer that can on-line monitoring transformer self partial discharge.
Background technology:
Develop rapidly along with electric power system, main power equipment in the system is carried out on-line monitoring seem more and more important, power transformer is one of equipment of most critical in the electric power system, and its normal operation is the important assurance to power system security, reliability service.Partial Discharge in Power Transformer is the sensitive index of its insulation status of reflection, and the technological difficulties of partial discharge monitoring are under the online situation, how effectively to extract signal and the problem that suppresses to disturb.
Power transformer that can on-line monitoring self partial discharge mainly is made of transformer housing, sleeve pipe, signal receiver and cabinet, sleeve pipe is in case top, be connected with end screen earth connection between sleeve pipe and the housing, signal receiver is fixed on the sleeve pipe place, be connected with cabinet, signal receiver receiving transformer discharge signal is sent to cabinet and carries out signal processing, finishes the monitoring to partial discharge of transformer.Because exist serious signal to disturb around the transformer, the monitoring result order of accuarcy is poor.
Summary of the invention:
The technical problems to be solved in the utility model is the power transformer that discloses a kind of anti-tampering on-line monitoring partial discharge.
The scheme of the utility model technical solution problem is to be with magnetic-core type electric current large sensor in the flange position of sleeve pipe, on the screen earth connection of end, be with the little transducer of magnetic-core type electric current, the coil of large sensor and little transducer is connected cabinet respectively, and the oversheath of large sensor connects ground wire.Large sensor falls space electricity impurity signal shielding during work, obtains end screen discharge signal by little transducer, and the oversheath of large sensor connects ground wire can ensure that transducer does not have floating potential.Large sensor and little transducer are Rogovski coil.
The utility model can prevent the interference of impurity signal effectively, and it is accurate to obtain the transformer discharge signal, reliable working performance.
Description of drawings:
Fig. 1 is the utility model schematic diagram;
Fig. 2 is the transducer schematic diagram.
Embodiment:
The utility model is made of transformer housing 1, sleeve pipe 2 and cabinet 3, be connected with end screen earth connection 4 between sleeve pipe 2 and the housing 1, be with magnetic-core type electric current large sensor 5 in the flange position of sleeve pipe 2, on the screen earth connection 4 of end, be with magnetic-core type electric current brief biography sensor 6, the coil of large sensor 5 and brief biography sensor 6 is connected cabinet 3 respectively, and the oversheath of large sensor 5 connects ground wire.
Claims (1)
1, a kind of power transformer of anti-tampering on-line monitoring partial discharge, constitute by transformer housing, sleeve pipe, signal receiver and cabinet, be connected with end screen earth connection between sleeve pipe and the housing, it is characterized in that: the flange position of sleeve pipe is with magnetic-core type electric current large sensor, on the screen earth connection of end, be with the little transducer of magnetic-core type electric current, the coil of large sensor and little transducer is connected cabinet respectively, and the oversheath of large sensor connects ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724658U CN201278304Y (en) | 2008-09-19 | 2008-09-19 | Anti-interference electric transformer on-line monitoring local discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200724658U CN201278304Y (en) | 2008-09-19 | 2008-09-19 | Anti-interference electric transformer on-line monitoring local discharging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201278304Y true CN201278304Y (en) | 2009-07-22 |
Family
ID=40895892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200724658U Expired - Fee Related CN201278304Y (en) | 2008-09-19 | 2008-09-19 | Anti-interference electric transformer on-line monitoring local discharging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201278304Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403818A (en) * | 2015-11-19 | 2016-03-16 | 北京邦瑞智能电网技术有限公司 | Method and system for detecting transformer partial discharge based on transformer bushing |
| CN106569048A (en) * | 2015-10-09 | 2017-04-19 | 宁夏琪凯节能设备有限公司 | Energy-saving type power transformer fault instrument |
-
2008
- 2008-09-19 CN CNU2008200724658U patent/CN201278304Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106569048A (en) * | 2015-10-09 | 2017-04-19 | 宁夏琪凯节能设备有限公司 | Energy-saving type power transformer fault instrument |
| CN105403818A (en) * | 2015-11-19 | 2016-03-16 | 北京邦瑞智能电网技术有限公司 | Method and system for detecting transformer partial discharge based on transformer bushing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 Termination date: 20160919 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |