CN102854246A - On-load tap-changer monitor - Google Patents
On-load tap-changer monitor Download PDFInfo
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- CN102854246A CN102854246A CN2012102856968A CN201210285696A CN102854246A CN 102854246 A CN102854246 A CN 102854246A CN 2012102856968 A CN2012102856968 A CN 2012102856968A CN 201210285696 A CN201210285696 A CN 201210285696A CN 102854246 A CN102854246 A CN 102854246A
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- changer
- control module
- grease chamber
- monitor
- image processing
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Abstract
The invention provides an on-load tap-changer monitor. The on-load tap-changer monitor comprises an oil chamber composed of an upper cavity and a lower cavity. The upper cavity of the oil chamber is provided with a switch. The lower cavity is provided with a tap-changer. The top of the upper cavity of the oil chamber is provided with an ultrasonic imager. The ultrasonic imager is electrically connected to an image processing control module arranged at an outer part of the oil chamber. The on-load tap-changer monitor can timely monitor mechanical wear of a switch contact terminal of an on-load tap-changer and transmit an alarm, and improve security and stability of operation of the on-load tap-changer.
Description
Technical field
The present invention relates to the transformer monitoring apparatus field, especially, is a kind of monitor for load ratio bridging switch.
Background technology
Line voltage changes with the method for operation and load, in order to improve quality of voltage.Make transformer that a specified output voltage can be arranged, normally realize pressure regulation by the position that changes a winding shunting tap, the device of connection and switching branch joint position is shunting switch, it is to adjust variation by the number of turn that changes Transformer Winding, change voltage by adjusting no-load voltage ratio, carry out the voltage adjustment.On-load voltage regulation is exactly deenergization not, allows transformer in normal operation, the bringing onto load regulation tap switch.Its principle is exactly, and when the moving contact of switch leaves not yet fully from one grade, connects transition circuit (by the electric current between two grades of the transition resistance restrictions), to guarantee not dead electricity of transformer, after moving contact arrives another shelves, disconnect again transition circuit, regulate and just finished.On-load voltage regulating switch also must have good arc extinction performance except excessive circuit is arranged.
Because change-over switch constantly motion causes the internal mechanical wearing and tearing, may cause the position that do not reach between contact, thereby cause the resistance between contact to increase, therefore can cause the overheated fault of contact, affect the safety and stability of load ratio bridging switch.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of load ratio bridging switch monitor, this pick-up unit can be monitored out the mechanical wear of load tap changer switching contact timely and be given the alarm.
The technical solution adopted for the present invention to solve the technical problems is:
This load ratio bridging switch monitor comprises and contains the up and down grease chamber of two cavitys, described grease chamber upper cavity is provided with change-over switch, lower chamber is provided with the tap selector switch, the top of the upper cavity of described grease chamber is provided with ultrasonic imager, and the image processing and control module that described ultrasonic imager and is arranged on the outside, grease chamber is electrically connected.
As preferably, described image processing and control module is processed as follows, at first use edge detecting function that the marginal information of image is extracted, then utilize contrast function that contact is partly identified separation, then utilize the comparison function that image and the normal picture separated are processed, draw similar number percent by the comparison function, use at last discriminant function to judge whether to exceed normal value, exceed normal value and report to the police.
As preferably, described image processing and control module is provided with Ethernet interface, can report to the police by network remote.
The invention has the advantages that:
Monitor the state of wear of switching contact with the ultrasonic imager that is arranged on upper cavity top, grease chamber, can effectively overcome the difficult problem that near the noble potential of switching contact and light are difficult to propagate in inside, grease chamber, utilize simultaneously image processing techniques to carry out in real time monitoring, guaranteed stability and the security of load ratio bridging switch.
Description of drawings
Fig. 1 is the structural representation of an embodiment of a kind of load ratio bridging switch monitor of the present invention.
Among the figure: 11, upper cavity; 12, lower chamber; 2, switching contact; 3, image processing and control module; 31, ultrasonic imager.
Embodiment
The present invention is further described below in conjunction with drawings and Examples:
Figure 1 shows that the planform schematic diagram of an embodiment of this load ratio bridging switch monitor.
This load ratio bridging switch monitor comprises and contains the up and down grease chamber of two cavitys, described grease chamber upper cavity 11 is provided with change-over switch, lower chamber 12 is provided with the tap selector switch, the top of the upper cavity 11 of described grease chamber is provided with ultrasonic imager 31, and the image processing and control module 3 that described ultrasonic imager 31 and is arranged on the outside, grease chamber is electrically connected.
Above-mentioned load ratio bridging switch monitor, described image processing and control module 3 is processed as follows, at first use edge detecting function that the marginal information of image is extracted, then utilize contrast function that contact is partly identified separation, then utilize the comparison function that image and the normal picture separated are processed, draw similar number percent by the comparison function, use at last discriminant function to judge whether to exceed normal value.
Above-mentioned load ratio bridging switch monitor, described image processing and control module 3 is provided with Ethernet interface, can report to the police by network remote.
Above-mentioned load ratio bridging switch monitor principle of work:
What ultrasonic imager 31 will be monitored contains switching contact 2 image data transmission to described image processing and control module 3, described image processing and control module 3 is processed as follows and is at first used edge detecting function that the marginal information of image is extracted, then utilize contrast function that contact is partly identified separation, then utilize the comparison function that image and the normal picture separated are processed, draw similar number percent by the comparison function, use at last discriminant function to judge whether to exceed normal value, exceed normal value and report to the police.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. load ratio bridging switch monitor, comprise and contain the up and down grease chamber of two cavitys, described grease chamber upper cavity (11) is provided with change-over switch, lower chamber (12) is provided with the tap selector switch, it is characterized in that: the top of the upper cavity of described grease chamber (11) is provided with ultrasonic imager (31), and the image processing and control module (3) that described ultrasonic imager (31) and is arranged on the outside, grease chamber is electrically connected.
2. load ratio bridging switch monitor according to claim 1, it is characterized in that: described image processing and control module (3) is processed as follows, at first use edge detecting function that the marginal information of image is extracted, then utilize contrast function that contact is partly identified separation, then utilize the comparison function that image and the normal picture separated are processed, draw similar number percent by the comparison function, use at last discriminant function to judge whether to exceed normal value.
3. load ratio bridging switch monitor according to claim 1, it is characterized in that: described image processing and control module (3) is provided with Ethernet interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102856968A CN102854246A (en) | 2012-08-13 | 2012-08-13 | On-load tap-changer monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102856968A CN102854246A (en) | 2012-08-13 | 2012-08-13 | On-load tap-changer monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102854246A true CN102854246A (en) | 2013-01-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102856968A Pending CN102854246A (en) | 2012-08-13 | 2012-08-13 | On-load tap-changer monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102854246A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542448A (en) * | 2003-11-07 | 2004-11-03 | 西安交通大学 | Ultrasonic imaging non-destructive detection method and detection system for appliance switch contact bonding quality |
| CN2800455Y (en) * | 2005-01-31 | 2006-07-26 | 上海华明电力设备制造有限公司 | Combined type on-load tap-changer |
| CN202794111U (en) * | 2012-08-13 | 2013-03-13 | 吴江市东泰电力特种开关有限公司 | On-load tap changer monitor |
-
2012
- 2012-08-13 CN CN2012102856968A patent/CN102854246A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1542448A (en) * | 2003-11-07 | 2004-11-03 | 西安交通大学 | Ultrasonic imaging non-destructive detection method and detection system for appliance switch contact bonding quality |
| CN2800455Y (en) * | 2005-01-31 | 2006-07-26 | 上海华明电力设备制造有限公司 | Combined type on-load tap-changer |
| CN202794111U (en) * | 2012-08-13 | 2013-03-13 | 吴江市东泰电力特种开关有限公司 | On-load tap changer monitor |
Non-Patent Citations (1)
| Title |
|---|
| 陈怀东 等: "基于小波变换的开关电触头钎焊质量超声成像检测", 《电工电能新技术》 * |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130102 |