CN204649952U - Based on the bushing shell for transformer monitoring device detection platform of synchro measure - Google Patents
Based on the bushing shell for transformer monitoring device detection platform of synchro measure Download PDFInfo
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- CN204649952U CN204649952U CN201520311006.0U CN201520311006U CN204649952U CN 204649952 U CN204649952 U CN 204649952U CN 201520311006 U CN201520311006 U CN 201520311006U CN 204649952 U CN204649952 U CN 204649952U
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Abstract
The utility model relates to a kind of bushing shell for transformer monitoring device detection platform based on synchro measure, comprise the first Luo-coil, first current monitoring circuit, first treatment circuit, first electric voltage observation circuit, second Luo-coil, second electric voltage observation circuit, second treatment circuit, second current monitoring circuit and comparator circuit, described first Luo-coil is connected with described first current monitoring circuit, described second Luo-coil is connected with described electric voltage observation circuit, described first treatment circuit is connected with described first current monitoring circuit and described first electric voltage observation circuit respectively, second treatment circuit is connected with the second current monitoring circuit and the second electric voltage observation circuit respectively, comparator circuit is connected with the first treatment circuit and the second treatment circuit respectively.Can avoid measuring second group of insulation parameter of the bushing shell for transformer of the inefficacy of gained for Insulation monitoring parameter with the second electric voltage observation circuit, the second treatment circuit and the second current monitoring circuit, and then improve precision and the efficiency of Insulation monitoring.
Description
Technical field
The utility model relates to transformer station's technical field, particularly relates to a kind of bushing shell for transformer monitoring device detection platform based on synchro measure.
Background technology
In transformer station field, bushing shell for transformer on-line monitoring method comprises straight-through current transformer calibration method (punching CT method), punching CT method measures capacitor dielectric loss, dielectric loss angle tangent is the characteristic parameter of reflection insulation dielectric loss size, only depend on properties of materials, have nothing to do with scantling and material shape, therefore, dielectric loss angle tangent can very effective reflection sleeve pipe integral insulation situation.In addition, from insulation characterisitic, dielectric capacitance amount is also the key character parameter of reflection sleeve pipe insulation status, and comprehensive monitoring dielectric loss angle tangent and dielectric capacitance amount can understand the insulation status of sleeve pipe more comprehensively.
Straight-through current transformer calibration method utilizes punching current transformer to obtain the end shield ground current signal of sleeve pipe, utilize and obtain reference voltage signal with sleeve pipe with the voltage transformer secondary side of bus, by phase difference value and the amplitude ratio of both calculating, draw dielectric loss angle tangent and the electric capacity of sleeve pipe.
But faint from the leakage current of bottom shielding of bushing sampling during measuring media loss tangent, usually only have milliampere level, Dielectric loss tangent value is little, therefore requires very high to measuring accuracy.And the fluctuation of system harmonics, mains frequency, the factor such as interferometry of electromagnetic field in environment residing for equipment, can reduce the measuring accuracy of dielectric loss angle tangent, it is invalid easily to cause bushing shell for transformer insulation measurement.
Utility model content
Based on this, be necessary for above-mentioned straight-through current transformer calibration method to survey the measuring accuracy of dielectric loss angle tangent low, easily cause the problem invalid to bushing shell for transformer insulation measurement, a kind of bushing shell for transformer monitoring device detection platform based on synchro measure is provided.
A kind of bushing shell for transformer monitoring device detection platform based on synchro measure, comprise the first Luo-coil, first current monitoring circuit, first treatment circuit, first electric voltage observation circuit, second Luo-coil, second electric voltage observation circuit, second treatment circuit, second current monitoring circuit and comparator circuit, described first Luo-coil is connected with described first current monitoring circuit, described second Luo-coil is connected with described electric voltage observation circuit, described first treatment circuit is connected with described first current monitoring circuit and described first electric voltage observation circuit respectively, described second treatment circuit is connected with described second current monitoring circuit and described second electric voltage observation circuit respectively, described comparator circuit is connected with described first treatment circuit and described second treatment circuit respectively.
The above-mentioned bushing shell for transformer monitoring device detection platform based on synchro measure, by first group of insulation parameter of the first Luo-coil, the first current monitoring circuit, the first treatment circuit, the first electric voltage observation circuit and the second Luo-coil measuring transformer sleeve pipe, by second group of insulation parameter of the second electric voltage observation circuit, the second treatment circuit and the second current monitoring circuit measuring transformer sleeve pipe, two groups of insulation parameters are compared, to determine whether second group of parameter is effective insulation parameter by comparator circuit.The second group of insulation parameter can avoiding losing efficacy is Insulation monitoring parameter, and then improves precision and the efficiency of Insulation monitoring.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model based on the bushing shell for transformer monitoring device detection platform of synchro measure.
Embodiment
Refer to Fig. 1, Fig. 1 is the structural representation of the bushing shell for transformer monitoring device detection platform based on synchro measure of the present utility model.
The described bushing shell for transformer monitoring device detection platform based on synchro measure of present embodiment, the first Luo-coil 110 can be comprised, first current monitoring circuit 120, first treatment circuit 130, first electric voltage observation circuit 140, second Luo-coil 150, second electric voltage observation circuit 230, second treatment circuit 220, second current monitoring circuit 210 and comparator circuit 160, first Luo-coil 110 is connected with the first current monitoring circuit 120, second Luo-coil 150 is connected with electric voltage observation circuit 140, first treatment circuit 130 is connected with the first current monitoring circuit 120 and the first electric voltage observation circuit 140 respectively, second treatment circuit 220 is connected with the second current monitoring circuit 210 and the second electric voltage observation circuit 230 respectively, comparator circuit 160 is connected with the first treatment circuit 130 and the second treatment circuit 220 respectively.
Present embodiment, by first group of insulation parameter of the first Luo-coil, the first current monitoring circuit, the first treatment circuit, the first electric voltage observation circuit and the second Luo-coil measuring transformer sleeve pipe, by second group of insulation parameter of the second electric voltage observation circuit, the second treatment circuit and the second current monitoring circuit measuring transformer sleeve pipe, two groups of insulation parameters are compared, to determine whether second group of parameter is effective insulation parameter by comparator circuit.The second group of insulation parameter can avoiding losing efficacy is Insulation monitoring parameter, and then improves precision and the efficiency of Insulation monitoring.
Wherein, for the first Luo-coil 110, preferably can be notched annulus.Be convenient to be enclosed within the ground loop of Transformer Bushing Tap, get final product the ground current signal of measuring transformer bottom shielding of bushing.
For the second Luo-coil 150, preferably can be notched annulus.Be convenient to be enclosed within the secondary loop of mutual induction of voltage, get final product the secondary current of measuring voltage mutual inductor, and then measure the voltage signal of the high voltage bus be connected with described voltage transformer (VT).
For the first current monitoring circuit 120, the current monitoring chip that those skilled in the art are usual can be comprised.For detecting phase place and the amplitude of the current signal that the first Luo-coil 110 spreads out of.
For the second current monitoring circuit 210, the current monitoring chip that those skilled in the art are usual can be comprised.For the phase place of the ground current signal of Transformer Bushing Tap that detects and amplitude.
For the first electric voltage observation circuit 140, the voltage monitoring chip that those skilled in the art are usual can be comprised.For detecting phase place and the amplitude of the voltage signal that the second Luo-coil 150 spreads out of.
For the second electric voltage observation circuit 230, the voltage monitoring chip that those skilled in the art are usual can be comprised.For detecting phase place and the amplitude of the voltage signal of the high voltage bus that bushing shell for transformer connects.
For the first treatment circuit 130, can comprise processor, processor is connected with the first current monitoring circuit 120, comparator circuit 160 and the first electric voltage observation circuit 140 respectively.The first electric capacity and the first medium loss parameter of bushing shell for transformer is converted to respectively for the amplitude that the first electric voltage observation circuit 140 and the first current monitoring circuit 120 transmitted and phase place.
For the second treatment circuit 220, can comprise processor, processor is connected with the second current monitoring circuit 210, comparator circuit 160 and the second electric voltage observation circuit 230 respectively.The second electric capacity and the second medium loss parameter of bushing shell for transformer is converted to respectively for the amplitude that the second electric voltage observation circuit 230 and the second current monitoring circuit 220 transmitted and phase place.
For comparator circuit 160, can comprise interconnective subtracter and comparer, described subtracter and described comparer can be the usual equipment in this area.For obtaining the relative mistake of the first electric capacity and the second electric capacity, generation relative capacity is poor, obtain the relative mistake of first medium loss parameter and second medium loss parameter, generate relative dielectric loss parameter, and described relative capacity difference is compared with the error range preset, to determine whether the second electric capacity and second medium loss parameter are effective insulation parameter respectively with described relative dielectric loss error.
Preferably, the above-described bushing shell for transformer monitoring device detection platform based on synchro measure also can comprise display device, and described display device is connected with comparator circuit 160.
Further, the above-described bushing shell for transformer monitoring device detection platform based on synchro measure also can comprise alarm, and alarm is connected with comparator circuit 160.
In one embodiment, the above-described bushing shell for transformer monitoring device detection platform based on synchro measure also can comprise Transformer Bushing Tap 420, first Luo-coil 110 is enclosed within the ground loop of Transformer Bushing Tap 420, and the second current monitoring circuit 210 is connected on the ground loop of Transformer Bushing Tap 420.
Preferably, the above-described bushing shell for transformer monitoring device detection platform based on synchro measure also can comprise high voltage bus 410, voltage transformer (VT) 310 and resistance 320, first termination high voltage bus 410 of voltage transformer (VT) 310, second end is connected with the input end of resistance 320, 3rd end and the 4th end ground connection, the output terminal of resistance 320 connects the input end of the second electric voltage observation circuit 230, the output terminal of the second electric voltage observation circuit 230 connects the second treatment circuit 220, the earth terminal ground connection of the second electric voltage observation circuit 230, second Luo-coil 150 is enclosed within the connecting line between resistance 320 and the second electric voltage observation circuit 230.
In another embodiment, also comprise shielding case 100, first current monitoring circuit 120, first treatment circuit 130, comparator circuit 160 and the first electric voltage observation circuit 140 are arranged on the inside of shielding case 100, and one end of shielding case 100 connects screen layer, other end ground connection.
The present embodiment, can effectively avoid external electromagnetic interference on the impact of the insulation measurement of bushing shell for transformer.
Preferably, the connecting line between the first Luo-coil 110, first current monitoring circuit 120, first treatment circuit 130, first electric voltage observation circuit 140 and the second Luo-coil 150 is single core cable.Signal transmission quality can be improved.
Bushing shell for transformer monitoring device detection platform based on synchro measure of the present utility model be simple to operate, reliability is high, the detection platform of portable convenient, can determine the validity of surveyed bushing shell for transformer insulation parameter.Can the duty of detection bushing shell for transformer monitoring system rapidly and efficiently, Timeliness coverage also safeguards the monitoring system lost efficacy, ensure that Monitoring Data is accurately effective, sleeve pipe insulation status can be reflected strictly according to the facts, thus effectively carry out fault pre-alarming and the diagnosis of bushing shell for transformer.
Bushing shell for transformer monitoring device detection platform based on synchro measure of the present utility model is in use without the need to dismantling the second current monitoring circuit and the second electric voltage observation circuit wiring, the on-line checkingi to monitoring system can be realized, improve the accuracy detected and avoid the bottom shielding of bushing lost territory accident dismantled current monitoring circuit wiring and may cause, improve the security that detection platform uses.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (10)
1. the bushing shell for transformer monitoring device detection platform based on synchro measure, it is characterized in that, comprise the first Luo-coil, first current monitoring circuit, first treatment circuit, first electric voltage observation circuit, second Luo-coil, second electric voltage observation circuit, second treatment circuit, second current monitoring circuit and comparator circuit, described first Luo-coil is connected with described first current monitoring circuit, described second Luo-coil is connected with described electric voltage observation circuit, described first treatment circuit is connected with described first current monitoring circuit and described first electric voltage observation circuit respectively, described second treatment circuit is connected with described second current monitoring circuit and described second electric voltage observation circuit respectively, described comparator circuit is connected with described first treatment circuit and described second treatment circuit respectively.
2. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, also comprise display device, described display device is connected with described comparator circuit.
3. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, also comprise alarm, described alarm is connected with described comparator circuit.
4. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, described comparator circuit comprises interconnective subtracter and comparer.
5. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, described first Luo-coil is notched annulus.
6. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, described second Luo-coil is notched annulus.
7. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, also comprise Transformer Bushing Tap, described first Luo-coil is enclosed within the ground loop of described Transformer Bushing Tap, and described second current monitoring circuit is connected on the ground loop of described Transformer Bushing Tap.
8. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 7, it is characterized in that, also comprise high voltage bus, voltage transformer (VT) and resistance, high voltage bus described in first termination of described voltage transformer (VT), second end is connected with the input end of described resistance, 3rd end and the 4th end ground connection, the output terminal of described resistance connects the input end of described second electric voltage observation circuit, the output terminal of described second electric voltage observation circuit connects described second treatment circuit, the earth terminal ground connection of described second electric voltage observation circuit, described second Luo-coil is enclosed within the connecting line between described resistance and described second electric voltage observation circuit.
9. the bushing shell for transformer monitoring device detection platform based on synchro measure according to claim 1, it is characterized in that, described first Luo-coil, described first current monitoring circuit, described first treatment circuit, connecting line between described first electric voltage observation circuit and described second Luo-coil are single core cable.
10. the bushing shell for transformer monitoring device detection platform based on synchro measure as claimed in any of claims 1 to 9, it is characterized in that, also comprise shielding case, described first current monitoring circuit, described first treatment circuit, described comparator circuit and described first electric voltage observation circuit are arranged on the inside of described shielding case, one end of described shielding case connects screen layer, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311006.0U CN204649952U (en) | 2015-05-14 | 2015-05-14 | Based on the bushing shell for transformer monitoring device detection platform of synchro measure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520311006.0U CN204649952U (en) | 2015-05-14 | 2015-05-14 | Based on the bushing shell for transformer monitoring device detection platform of synchro measure |
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| CN204649952U true CN204649952U (en) | 2015-09-16 |
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| CN201520311006.0U Expired - Fee Related CN204649952U (en) | 2015-05-14 | 2015-05-14 | Based on the bushing shell for transformer monitoring device detection platform of synchro measure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| PL424727A1 (en) * | 2018-03-01 | 2019-09-09 | Igrid Technology Spółka Z Ograniczoną Odpowiedzialnością | Method and the system for monitoring of power network |
| CN113552519A (en) * | 2021-06-08 | 2021-10-26 | 中国电力科学研究院有限公司 | Method and device for testing performance of casing monitoring system |
-
2015
- 2015-05-14 CN CN201520311006.0U patent/CN204649952U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL424727A1 (en) * | 2018-03-01 | 2019-09-09 | Igrid Technology Spółka Z Ograniczoną Odpowiedzialnością | Method and the system for monitoring of power network |
| 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 |
| CN113552519A (en) * | 2021-06-08 | 2021-10-26 | 中国电力科学研究院有限公司 | Method and device for testing performance of casing monitoring system |
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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: 20150916 |