CN105445634B - Device and method for positioning partial discharge space - Google Patents
Device and method for positioning partial discharge space Download PDFInfo
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- CN105445634B CN105445634B CN201510998995.XA CN201510998995A CN105445634B CN 105445634 B CN105445634 B CN 105445634B CN 201510998995 A CN201510998995 A CN 201510998995A CN 105445634 B CN105445634 B CN 105445634B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a positioning device for a partial discharge space, which comprises a plurality of antennas, wherein the antennas are connected with a signal amplifier, the signal amplifier is also connected with a signal collector, and the positioning method for the partial space comprises the following steps: arranging an antenna for receiving electromagnetic wave signals of the discharge points, and positioning the rough discharge points; the antenna is rearranged; and (3) accurately positioning the discharge point. The beneficial effects of the invention are as follows: the discharge points are roughly positioned, then the arrangement mode of the antennas is changed, and then the discharge points are precisely positioned, so that the calculation speed of positioning the discharge points is high, and the time consumption is short; high positioning accuracy and the like.
Description
Technical Field
The invention relates to the field of power transformation and measurement and test, in particular to a device and a method for positioning a partial discharge space.
Background
The electrical equipment in the transformer substation is numerous, once the electrical equipment fails, the electrical equipment can cause power grid accidents and large-scale power failure, and huge negative effects are brought to national economy and social stability. Statistics show that a significant part of the failure of the device is caused by the gradual development of partial discharges within it. Currently, space positioning of partial discharges of a substation has become an important task for substation inspection. The space positioning of the partial discharge of the transformer substation is generally performed based on an ultrahigh frequency technology, 4 or more antennas are used, the positioning is performed by calculating the time difference of the electromagnetic waves reaching each antenna, and the data of the 4 antennas are processed simultaneously, so that the wide space in the transformer substation is searched, the calculated amount is large, the time consumption is long, and the efficiency is low. When the discharge point distance is far, the accuracy is low. Therefore, research on a new partial discharge space positioning method and improvement of positioning work efficiency and accuracy are urgent to develop.
For the problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
The present invention is directed to a device and a method for positioning partial discharge space, which overcome the above-mentioned drawbacks of the prior art.
The invention aims at realizing the following technical scheme:
the partial discharge space positioning device comprises a plurality of antennas, wherein the antennas are connected with signal amplifiers, and the signal amplifiers are also connected with signal collectors; wherein:
the antenna is used for receiving electromagnetic wave signals of the space discharge point;
the signal amplifier is used for amplifying electromagnetic wave signals received by the antenna.
Further, the antenna is a radio frequency antenna, and the working frequency band of the radio frequency antenna is between 500MHz and 2 GHz.
Furthermore, the coupling bandwidth of the signal collector is larger than 2GHz, and the sampling rate is larger than 4GHz.
Further, the number of the antennas is at least 4.
A method of partial discharge space localization comprising the steps of:
step 1: 4 antennas are arranged on the same horizontal plane in advance, and the 4 antennas are marked with marks as an antenna I, an antenna II, an antenna III and an antenna IV respectively;
step 2: adjusting the positions of the second antenna and the fourth antenna, ensuring that the time of the electromagnetic signals of the discharge points reaching the second antenna and the fourth antenna is the same, and then determining the discharge point at the moment;
step 3: and continuously comparing the time sequence of the electromagnetic wave signals sent by the discharge points reaching the first antenna and the fourth antenna, and further completing the positioning of the rough discharge points once;
step 4: after the rough position of the antenna in the step 3 is positioned, the distance between the antenna I and the antenna III is further increased, the antenna IV is raised, and then the antenna is rearranged;
step 5: and (3) performing electromagnetic wave search on the rough position determined in the step (3) by using the antenna after the position is changed so as to finish the accurate positioning of the discharge point.
Further, the antenna is a radio frequency antenna, and the working frequency band of the antenna is between 500MHz and 2 GHz.
Further, a signal collector is adopted to receive and transmit the electromagnetic wave of the discharge point.
Furthermore, the coupling bandwidth of the signal collector is larger than 2GHz, and the sampling rate is larger than 4GHz.
The beneficial effects of the invention are as follows: the discharge points are roughly positioned, then the arrangement mode of the antennas is changed, and then the discharge points are precisely positioned, so that the calculation speed of positioning the discharge points is high, and the time consumption is short; high positioning accuracy and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a coarse positioning antenna arrangement in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a precisely positioned antenna arrangement according to an embodiment of the present invention;
fig. 3 is a schematic view of a partial discharge space positioning apparatus according to an embodiment of the present invention.
In the figure:
1. an antenna; 2. a signal amplifier; 3. a signal collector.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
As shown in fig. 3, a positioning device for partial discharge space according to an embodiment of the present invention includes a plurality of antennas 1, wherein a signal amplifier 2 is connected to the antennas 1, and a signal collector 3 is further connected to the signal amplifier 2; wherein:
the antenna 1 is used for receiving electromagnetic wave signals of space discharge points;
the signal amplifier 2 is configured to amplify an electromagnetic wave signal received by the antenna.
Further, the antenna 1 is a radio frequency antenna, and the working frequency band of the radio frequency antenna is between 500MHz and 2 GHz.
Further, the coupling bandwidth of the signal collector 3 is greater than 2GHz, and the sampling rate is greater than 4GHz.
Further, the number of the antennas 1 is at least 4.
A method of partial discharge space localization comprising the steps of:
step 1: 4 antennas are arranged on the same horizontal plane in advance, and the 4 antennas are marked with marks as an antenna I, an antenna II, an antenna III and an antenna IV respectively;
step 2: adjusting the positions of the second antenna and the fourth antenna, ensuring that the time of the electromagnetic signals of the discharge points reaching the second antenna and the fourth antenna is the same, and then determining the discharge point at the moment;
step 3: and continuously comparing the time sequence of the electromagnetic wave signals sent by the discharge points reaching the first antenna and the fourth antenna, and further completing the positioning of the rough discharge points once;
step 4: after the rough position of the antenna in the step 3 is positioned, the distance between the antenna I and the antenna III is further increased, the antenna IV is raised, and then the antenna is rearranged;
step 5: and (3) performing electromagnetic wave search on the rough position determined in the step (3) by using the antenna after the position is changed so as to finish the accurate positioning of the discharge point.
Further, the antenna is a radio frequency antenna, and the working frequency band of the antenna is between 500MHz and 2 GHz.
Further, a signal collector is adopted to receive and transmit the electromagnetic wave of the discharge point.
Furthermore, the coupling bandwidth of the signal collector is larger than 2GHz, and the sampling rate is larger than 4GHz.
The specific implementation method is as follows: the positioning needs 4 antennas, the numbers of which are 1-4, and the 4 antennas are positioned on the same horizontal plane, and the arrangement mode is shown in figure 1. Firstly, the two antennas receive electromagnetic wave signals partially discharged in space by utilizing the second antenna and the fourth antenna, the antennas are moved so that the time for the electromagnetic wave signals to reach the second antenna and the fourth antenna is the same, and at the moment, the discharge point is positioned on the middle surface of the second antenna and the fourth antenna. And then comparing the time sequence of the electromagnetic wave reaching the first antenna and the fourth antenna to determine whether the discharge is positioned at one side of the antenna or at the fourth side of the antenna, and completing rough positioning. Then, the distance between the first antenna and the third antenna is increased, and the fourth antenna is lifted, so that the antenna arrangement conversion is completed, as shown in fig. 2. And finally, searching the rough positioning area by using 4 antennas to finish the accurate positioning.
The invention has the advantages that the rough positioning of the discharge point is realized by using 2 antennas, the arrangement mode of the antennas is changed, and the accurate positioning of the discharge point is realized in the space range of the rough positioning by using 4 antennas. Most of calculation is based on data of 2 antennas, so that the calculation speed is high, and the time consumption is short; during accurate positioning, the calculation amount is small and the accuracy is high because the search is performed in the space range of rough positioning.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The partial discharge space positioning method comprises a partial discharge space positioning device, wherein the partial discharge space positioning device comprises a plurality of antennas (1) which are arranged, the antennas (1) are connected with signal amplifiers (2), and the signal amplifiers (2) are also connected with signal collectors (3); wherein: the antenna (1) is used for receiving electromagnetic wave signals of space discharge points; the signal amplifier (2) is used for amplifying electromagnetic wave signals received by the antenna, and is characterized by comprising the following steps:
step 1: 4 antennas are arranged on the same horizontal plane in advance, and the 4 antennas are marked with marks as an antenna I, an antenna II, an antenna III and an antenna IV respectively;
step 2: adjusting the positions of the second antenna and the fourth antenna, ensuring that the time of the electromagnetic wave signals of the discharge points reaching the second antenna and the fourth antenna is the same, and then determining the discharge point at the moment;
step 3: and continuously comparing the time sequence of the electromagnetic wave signals sent by the discharge points reaching the first antenna and the fourth antenna, and further completing the positioning of the rough discharge points once;
step 4: after the rough position of the antenna in the step 3 is positioned, the distance between the antenna I and the antenna III is further increased, the antenna IV is raised, and then the antenna is rearranged;
step 5: and (3) performing electromagnetic wave search on the rough position determined in the step (3) by using the antenna after the position is changed so as to finish the accurate positioning of the discharge point.
2. The method of partial discharge space localization according to claim 1, wherein the antenna is a radio frequency antenna, the operating band of the antenna being between 500MHz-2 GHz.
3. The method of positioning a partial discharge space according to claim 1, wherein electromagnetic waves of the discharge point are received and transmitted using a signal collector.
4. A method of positioning a partial discharge space according to claim 3, wherein the signal collector has a coupling bandwidth greater than 2GHz and a sampling rate greater than 4GHz.
5. A method of positioning a partial discharge space according to claim 1, characterized in that the number of antennas (1) is at least 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998995.XA CN105445634B (en) | 2015-12-28 | 2015-12-28 | Device and method for positioning partial discharge space |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510998995.XA CN105445634B (en) | 2015-12-28 | 2015-12-28 | Device and method for positioning partial discharge space |
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| CN105445634A CN105445634A (en) | 2016-03-30 |
| CN105445634B true CN105445634B (en) | 2023-08-08 |
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| CN109521336B (en) * | 2018-11-23 | 2021-11-26 | 重庆大学 | Automatic monitoring and positioning method and system for partial discharge of transformer substation based on inspection robot |
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| CN1306620A (en) * | 1998-06-24 | 2001-08-01 | 康比泰克交通***公司 | Device for position determination by means of radio waves |
| JP2011149896A (en) * | 2010-01-25 | 2011-08-04 | Nissin Electric Co Ltd | Partial discharge measuring method, locating method, and device therefor |
| CN103558526A (en) * | 2013-11-12 | 2014-02-05 | 国网上海市电力公司 | Method for detection of partial discharge of switch cabinet |
| CN103823164A (en) * | 2014-01-15 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Ultra-high frequency non-contact partial discharge positioning detecting device and positioning algorithm |
| CN103913677A (en) * | 2013-01-07 | 2014-07-09 | 国家电网公司 | Method and system for locating partial discharge source |
| CN104094135A (en) * | 2011-12-16 | 2014-10-08 | 竞技者公司 | A method and a sensor for determining a direction-of-arrival of impingent radiation |
| CN106688328B (en) * | 2011-10-27 | 2015-07-15 | 上海卫星工程研究所 | Satellite bidimensional overlength baseline differs passive location method |
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2015
- 2015-12-28 CN CN201510998995.XA patent/CN105445634B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306620A (en) * | 1998-06-24 | 2001-08-01 | 康比泰克交通***公司 | Device for position determination by means of radio waves |
| JP2011149896A (en) * | 2010-01-25 | 2011-08-04 | Nissin Electric Co Ltd | Partial discharge measuring method, locating method, and device therefor |
| CN106688328B (en) * | 2011-10-27 | 2015-07-15 | 上海卫星工程研究所 | Satellite bidimensional overlength baseline differs passive location method |
| CN104094135A (en) * | 2011-12-16 | 2014-10-08 | 竞技者公司 | A method and a sensor for determining a direction-of-arrival of impingent radiation |
| CN103913677A (en) * | 2013-01-07 | 2014-07-09 | 国家电网公司 | Method and system for locating partial discharge source |
| CN103558526A (en) * | 2013-11-12 | 2014-02-05 | 国网上海市电力公司 | Method for detection of partial discharge of switch cabinet |
| CN103823164A (en) * | 2014-01-15 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Ultra-high frequency non-contact partial discharge positioning detecting device and positioning algorithm |
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