CN204855772U - Voltage transformer temperature on -line monitoring device - Google Patents
Voltage transformer temperature on -line monitoring device Download PDFInfo
- Publication number
- CN204855772U CN204855772U CN201520529700.XU CN201520529700U CN204855772U CN 204855772 U CN204855772 U CN 204855772U CN 201520529700 U CN201520529700 U CN 201520529700U CN 204855772 U CN204855772 U CN 204855772U
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- China
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- transformer
- voltage
- voltage transformer
- line monitoring
- temperature
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Abstract
The utility model provides a voltage transformer temperature on -line monitoring device, its characterized in that includes: transformer, electric current, voltage acquisition module, momentary load and the control unit, the former limit of transformer links to each other with voltage transformer's secondary output terminal, electric current collection module and voltage transformer's the secondary output terminal and the former limit of transformer establish ties mutually, the voltage acquisition module connects in parallel with voltage transformer's the secondary output terminal and the former limit of transformer mutually, the momentary load links to each other with the vice limit of transformer, the control unit links to each other with the vice limit and the momentary load of transformer, regularly drop into through the control unit control momentary load to the equivalent internal resistance change volume that voltage transformer inclined is calculated out according to current -voltage's change gauge to simultaneous acquisition transformer former limit electric current and the former polygonal voltage of transformer, and the temperature coefficient according to the wire material derives the temperature rise value of the inside winding of voltage transformer again, and then realizes the on -line monitoring to the voltage transformer temperature.
Description
Technical field
The utility model relates to power system technology, is specifically related to a kind of voltage transformer (VT) temperature on-line monitoring device.
Background technology
Voltage transformer (VT), as the visual plant in electric system, is often not easily realized when breaking down, and finally develops into major accident.The malfunction monitoring of current domestic existing voltage transformer (VT) is application infrared thermal imaging technique, by the non-contact measurement to voltage transformer (VT), judges voltage transformer (VT) temperature rise and internal fault position.
Above-mentioned monitoring mode belongs to off-line type monitoring, can not the duty of reflecting voltage mutual inductor continuously, and infrared thermography cost is higher, and needs personnel to arrive execute-in-place.The utility model passes through.
Summary of the invention
For the problems referred to above, the utility model provides a kind of by the active probe to voltage transformer (VT) equivalent resistance, the temperature rise situation of indirect monitoring voltage transformer (VT), and then the voltage transformer (VT) temperature on-line monitoring device realizing on-line monitoring.
The technical scheme that the utility model adopts for its technical matters of solution is:
A kind of voltage transformer (VT) temperature on-line monitoring device, is characterized in that comprising:
Transformer, electric current, voltage acquisition module, momentary load and control module; The former limit of described transformer is connected with the secondary output terminals of voltage transformer (VT), the secondary output terminals of described current acquisition module and voltage transformer (VT) and the primary edge series of transformer join, and the secondary output terminals of described voltage acquisition module and voltage transformer (VT) and the former limit of transformer are in parallel; Described momentary load is connected with the secondary of transformer, and described control module is connected with momentary load with the secondary of transformer.
As the further improvement of such scheme, the impedance of described momentary load and the internal resistance of voltage transformer (VT) are at the same order of magnitude.
Further, described transformer, electric current, voltage acquisition module, momentary load and control module to be arranged in a housing and to be connected with interval primary equipment on-off switch with the voltage transformer (VT) of outside by being arranged on the aviation plug on housing.
Wherein, described primary equipment on-off switch be post load switch or isolating switch, institute's on-load switch or isolating switch in indoor or outdoor switch box.
Wherein, described voltage transformer (VT) is applicable to indoor or outdoor, uses for primary equipment power taking or measurement.
The beneficial effects of the utility model are:
1, control momentary load timing by control module to drop into, and gather primary side current of transformer and primary voltage of transformer simultaneously, variable quantity according to current/voltage calculates the equivalent internal resistance variable quantity of voltage transformer (VT) side, derive the temperature rise value of the inner winding of voltage transformer (VT) again according to the temperature coefficient of conductor material, and then realize the on-line monitoring to mutual induction of voltage actuator temperature; When the variable quantity of temperature rise exceedes definite value, report voltage transformer (VT) abnormal information to main website, serious timer directly exports separating brake order to primary equipment on/off switch switch.
2, the utility model is by the on-line monitoring to voltage transformer (VT) side equivalent internal resistance variable quantity, indirectly reflect the temperature rise situation of the inner winding of voltage transformer (VT), monitoring device can utilize prior art platform upgrading, without the need to independent installation, reduce costs, and do not need on-the-spot artificial participation, realize backstage on-line monitoring function by wireless communication technique.
Accompanying drawing explanation
Be further detailed below in conjunction with the drawings and specific embodiments:
Fig. 1 is the system chart of the utility model embodiment;
Fig. 2 is the principle of work schematic diagram of the utility model embodiment.
Embodiment
Below with reference to embodiment and accompanying drawing, design of the present utility model and technique effect are clearly and completely described, to understand the purpose of this utility model, characteristic sum effect fully.Obviously; described embodiment is a part of embodiment of the present utility model, instead of whole embodiment, based on embodiment of the present utility model; other embodiments that those skilled in the art obtains under the prerequisite not paying creative work, all belong to the scope of the utility model protection.
With reference to Fig. 1-2, a kind of voltage transformer (VT) temperature on-line monitoring device, comprising:
Transformer 1, its former limit is connected with the secondary output terminals of voltage transformer (VT) 6, for voltage of transformation grade; Current acquisition module 2, joins with the secondary output terminals of voltage transformer (VT) 6 and the primary edge series of transformer 1, for gathering the primary current of transformer 1; Voltage acquisition module 3, is in parallel, for gathering the original edge voltage of transformer 1 with the secondary output terminals of voltage transformer (VT) 6 and the former limit of transformer 1; Momentary load 4, is connected with the secondary of transformer 1, and the described impedance of momentary load 4 and the internal resistance of voltage transformer (VT) are at the same order of magnitude; And control module 5, be connected with momentary load with the secondary of transformer 1, for calculating voltage mutual inductor side equivalent internal resistance variable quantity, control momentary load and drop into and control this interval primary equipment divide-shut brake.
Described transformer 1, electric current, voltage acquisition module 2,3, momentary load 4 and control module 5 to be arranged in a housing and to be connected with interval primary equipment on-off switch 7 with the voltage transformer (VT) 6 of outside by being arranged on the aviation plug on housing.
Wherein, described primary equipment on-off switch 7 be post load switch or isolating switch, institute's on-load switch or isolating switch in indoor or outdoor switch box.
Embodiment of the present utility model is not restricted to the described embodiments, as long as it reaches technique effect of the present utility model with substantially identical means, all should belong to protection domain of the present utility model.
Claims (4)
1. a voltage transformer (VT) temperature on-line monitoring device, is characterized in that comprising: transformer (1), electric current, voltage acquisition module (2,3), momentary load (4) and control module (5); The former limit of described transformer (1) is connected with the secondary output terminals of voltage transformer (VT) (6), described current acquisition module (2) joins with the secondary output terminals of voltage transformer (VT) (6) and the primary edge series of transformer (1), and described voltage acquisition module (3) is in parallel with the secondary output terminals of voltage transformer (VT) (6) and the former limit of transformer (1); Described momentary load (4) is connected with the secondary of transformer (1), and described control module (5) is connected with momentary load with the secondary of transformer (1).
2. a kind of voltage transformer (VT) temperature on-line monitoring device according to claim 1, is characterized in that: the impedance of described momentary load (4) and the internal resistance of voltage transformer (VT) are at the same order of magnitude.
3. a kind of voltage transformer (VT) temperature on-line monitoring device according to claim 1 and 2, is characterized in that: described transformer (1), electric current, voltage acquisition module (2,3), momentary load (4) and control module (5) to be arranged in a housing and to be connected with interval primary equipment on-off switch (7) with the voltage transformer (VT) (6) of outside by the aviation plug be arranged on housing.
4. a kind of voltage transformer (VT) temperature on-line monitoring device according to claim 3, is characterized in that: described primary equipment on-off switch (7) is post load switch or isolating switch, institute's on-load switch or isolating switch in indoor or outdoor switch box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520529700.XU CN204855772U (en) | 2015-07-21 | 2015-07-21 | Voltage transformer temperature on -line monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520529700.XU CN204855772U (en) | 2015-07-21 | 2015-07-21 | Voltage transformer temperature on -line monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855772U true CN204855772U (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520529700.XU Expired - Fee Related CN204855772U (en) | 2015-07-21 | 2015-07-21 | Voltage transformer temperature on -line monitoring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204855772U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675044A (en) * | 2016-01-13 | 2016-06-15 | 济南大学 | Temperature-based transformer fault diagnosis method |
-
2015
- 2015-07-21 CN CN201520529700.XU patent/CN204855772U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675044A (en) * | 2016-01-13 | 2016-06-15 | 济南大学 | Temperature-based transformer fault diagnosis method |
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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: 20151209 Termination date: 20200721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |