CN204188764U - Capacitive high-voltage equipment insulation performance detecting system - Google Patents
Capacitive high-voltage equipment insulation performance detecting system Download PDFInfo
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- CN204188764U CN204188764U CN201420736115.2U CN201420736115U CN204188764U CN 204188764 U CN204188764 U CN 204188764U CN 201420736115 U CN201420736115 U CN 201420736115U CN 204188764 U CN204188764 U CN 204188764U
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- 238000009413 insulation Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 11
- 230000001939 inductive effect Effects 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
A kind of capacitive high-voltage equipment insulation performance detecting system that the utility model provides, comprise for detecting the circuital leakage total current detection module of leakage, for monitoring humidity detecting module and the processing module of the humidity of the air in capacitive high-tension apparatus region, described processing module is connected with described leakage total current detection module and humidity detecting module; The utility model can determine the size of capacitive leakage current at short notice, and Measurement accuracy can be carried out on the air humidity affecting capacitive leakage at short notice, eliminate the phenomenons such as the specific inductive capacity drift existed in traditional moisture measurement, ensure the accuracy of capacitive leakage current measurement, thus can accurately determine to put the situation of change of resistive leakage current in detection time, finally accurately can make accurate judgement to the insulating property of capacitive high-tension apparatus.
Description
Technical field
The utility model relates to a kind of electric detection system, particularly relates to a kind of capacitive high-voltage equipment insulation performance detecting system.
Background technology
One of health measurement leading indicator in electric system with the high-tension apparatus of insulating property index is exactly leakage current.A large amount of high-tension insulators, lightning arrester, voltage transformer (VT) etc. are all adopt this index as the basis for estimation of equipment.Form the power equipment of high pressure over the ground, under the working condition of good insulation, show as the characteristic of capacitive over the ground, therefore under the effect of 50Hz and higher hamonic wave thereof, the leakage current of capacitive high-tension apparatus mainly containing more than 90% capacity current and a small amount of current in resistance property.Because current in resistance property proportion is little, precision prescribed is high, and prior art is complicated for the measuring method of current in resistance property, and cost is high, therefore present widely used portable or online discharge current method of testing measures capacity current and current in resistance property sum, namely detects and leaks total current, leaking circuital measuring principle is exactly when capacity current is relatively stable, when current in resistance property increases considerably, show as and leak circuital increasing considerably, now just can judge that high voltage equipment insulation goes wrong, but, there are the following problems for the detection of capacitive leakage current for prior art: under high voltages, the capacitance of outdoor capacitive high-tension apparatus affects very large by atmospheric humidity, outside atmosphere humidity is along with temperature, the impact change of wind speed is also very fast, capacity current is caused to alter a great deal, cause leakage total current to there will be in different humidity situation significantly to change, thus cause can not determine that to leak circuital change be that capacity current change causes or caused by current in resistance property, thus cause the judgement of final insulating property inaccurate.
Therefore, need to propose a kind of new detection system, the size of capacitive leakage current can be determined at short notice, thus can accurately determine to put the situation of change of resistive leakage current in detection time, finally accurately can make accurate judgement to the insulating property of capacitive high-tension apparatus.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of capacitive high-voltage equipment insulation performance detecting system, the size of capacitive leakage current can be determined at short notice, thus can accurately determine to put the situation of change of resistive leakage current in detection time, finally accurately can make accurate judgement to the insulating property of capacitive high-tension apparatus.
A kind of capacitive high-voltage equipment insulation performance detecting system that the utility model provides, comprise for detecting the circuital leakage total current detection module of leakage, for monitoring humidity detecting module and the processing module of the humidity of the air in capacitive high-tension apparatus region, described processing module is connected with described leakage total current detection module and humidity detecting module.
Further, described humidity detecting module comprise capacitor in the region being arranged at capacitive high-tension apparatus, the charging circuit be connected with described capacitor, the radiating circuit be connected with described charging circuit, for the receiving circuit that receives the wireless signal that radiating circuit is launched and the counter be connected with described receiving circuit.
Further, described humidity detecting module also comprises the humidity treatment circuit be connected with described counter.
Further, described detection system also comprises the comparator circuit be connected with described humidity treatment circuit and the central processing circuit be connected with described comparator circuit, and described central processing circuit is also connected with described humidity treatment circuit.
Further, non-humidity-sensitive material is provided with between described capacitor plate.
Further, rectification circuit is provided with between described charging circuit output terminal and radiating circuit input end.
Further, described detection system also comprises the storer and display that are connected with described central processing circuit.
The beneficial effects of the utility model: the utility model can determine the size of capacitive leakage current at short notice, and Measurement accuracy can be carried out on the air humidity affecting capacitive leakage at short notice, eliminate the phenomenons such as the specific inductive capacity drift existed in traditional moisture measurement, ensure the accuracy of capacitive leakage current measurement, thus can accurately determine to put the situation of change of resistive leakage current in detection time, finally accurately can make accurate judgement to the insulating property of capacitive high-tension apparatus, radiating circuit and former each circuit are all without the need to electricity consumption, only receiving circuit and circuit are below powered, effective saves energy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is theory diagram of the present utility model.
Embodiment
Fig. 1 is theory diagram of the present utility model, as shown in the figure, a kind of capacitive high-voltage equipment insulation performance detecting system that the utility model provides, comprise for detecting the circuital leakage total current detection module of leakage, for monitoring humidity detecting module and the processing module of the humidity of the air in capacitive high-tension apparatus region, described processing module is connected with described leakage total current detection module and humidity detecting module; The utility model can determine the size of capacitive leakage current at short notice, and Measurement accuracy can be carried out on the air humidity affecting capacitive leakage at short notice, eliminate the phenomenons such as the specific inductive capacity drift existed in traditional moisture measurement, ensure the accuracy of capacitive leakage current measurement, thus can accurately determine to put the situation of change of resistive leakage current in detection time, finally accurately can make accurate judgement to the insulating property of capacitive high-tension apparatus.
In the present embodiment, described humidity detecting module comprise capacitor in the region being arranged at capacitive high-tension apparatus, the charging circuit be connected with described capacitor, the radiating circuit be connected with described charging circuit, for the receiving circuit that receives the wireless signal that radiating circuit is launched and the counter be connected with described receiving circuit, wherein, charging circuit adopts charging capacitor, when capacitor is placed in this alternating electric field, induced voltage can be produced between the pole plate of capacitor, when two polar plate spacings are fixed, position in high-voltage electric field is fixed, therefore the voltage between electric capacity two pole plates is just fixing, and in the air of drying, do not having under extraneous interference, the accommodating of electric capacity also can be relatively fixing, between the pole plate that the air containing moisture flows through capacitor, the specific inductive capacity between capacitor plate will be changed, also will changing capacitance and capacitor store the quantity of electric charge, the quantity of electric charge of storage is transferred in charging circuit in the mode of electric current by capacitor, between the pole plate that wet air flows through capacitor, so the specific inductive capacity between capacitor plate will be increased, thus increase the capacity of electric capacity, and then increase the quantity of electric charge of capacitor storage, after being charged to charging circuit by capacitor in charging circuit, after the voltage of charging circuit reaches the threshold voltage of radiating circuit work, radiating circuit is with between the time of setting, counter is added up the number of times received within the time of setting.
In the present embodiment, described humidity detecting module also comprises the humidity treatment circuit be connected with described counter, described humidity treatment circuit adopts existing single-chip microcomputer, integrated chip or PC computer, in humidity treatment circuit with have humidity-reception number of times empirical comparisons table, the empirical comparisons table of the reception number of times of wireless signal and humidity-reception number of times is contrasted, determine the humidity flowing through the air of capacitor of current detection, wherein, humidity-accept number of times empirical comparisons table for draw through measurement, in different areas, such as southern and northern, this table of comparisons is different value, therefore, just no longer the table of comparisons is enclosed at this, such as: as humidity be 40% time, the quantity of electric charge of capacitor induction can make radiating circuit in setting-up time, launch 80 signals, as humidity be 50% time, the quantity of electric charge of capacitive sensing can make radiating circuit in setting-up time, launch 100 signals, so according to current emitting times, contrast in humidity-reception number of times empirical comparisons table, determine that current is humidity value, wherein, radiating circuit sends wireless signal according to the time interval of setting, i.e. transmission frequency, radiating circuit wireless signal emission interval is once transmitting wireless signal, receiving circuit receives a complete wireless signal just be can be regarded as once, as radiating circuit just transmits, but do not launch complete, even if wireless signal have received signal, still not very doing is a complete signal, such as in fact radiating circuit transmits 60 times, but do not have transmitting the 60th time to complete, the voltage of charging circuit does not just reach threshold voltage, so the actual number of times received of receiving circuit is 59 times, humidity is determined according to 59 times, but at this moment determine that humidity remains accurately, because the humidity corresponding to electricity consumed for the 60th time belongs in error range, and this error is enough little.
In the present embodiment, described detection system also comprises the comparator circuit be connected with described humidity treatment circuit and the central processing circuit be connected with described comparator circuit, described central processing circuit is also connected with described humidity treatment circuit, comparator circuit, prestore humidity-capacity current empirical comparisons table, the humidity value export humidity treatment circuit and humidity-capacity current empirical comparisons table contrast, determine capacitive leakage current and export, central processing unit receives leakage total current and the capacitive leakage current of the output of leakage current detection module, and calculate resistive leakage current and leak circuital ratio, and the threshold value of this ratio and setting is compared, exceed the threshold value of setting, judge the decreasing insulating of capacitive high-tension apparatus, wherein, central processing unit and humidity treatment circuit all adopt existing single-chip microcomputer, computer or other smart machines.
In the present embodiment, non-humidity-sensitive material is provided with between described capacitor plate, by this structure, the specific inductive capacity between capacitor plate can be increased, thus increase capacitance and the stability of capacitor, and avoid the specific inductive capacity drift that traditional humidity-sensitive material brings, ensure the accuracy of test result, and the serviceable life of this test macro can be extended.
In the present embodiment, between described charging circuit output terminal and radiating circuit input end, be provided with rectification circuit, stable work electricity consumption can be provided for radiating circuit.
In the present embodiment, described detection system also comprises the storer and display that are connected with described central processing circuit, and display is used for the testing result property entered to show, and storer is used for storing data, for follow-up work provides original foundation.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (7)
1. a capacitive high-voltage equipment insulation performance detecting system, it is characterized in that: comprise for detecting the circuital leakage total current detection module of leakage, for monitoring humidity detecting module and the processing module of the humidity of the air in capacitive high-tension apparatus region, described processing module is connected with described leakage total current detection module and humidity detecting module.
2. capacitive high-voltage equipment insulation performance detecting system according to claim 1, is characterized in that: described humidity detecting module comprise capacitor in the region being arranged at capacitive high-tension apparatus, the charging circuit be connected with described capacitor, the radiating circuit be connected with described charging circuit, for the receiving circuit that receives the wireless signal that radiating circuit is launched and the counter be connected with described receiving circuit.
3. capacitive high-voltage equipment insulation performance detecting system according to claim 2, is characterized in that: described humidity detecting module also comprises the humidity treatment circuit be connected with described counter.
4. capacitive high-voltage equipment insulation performance detecting system according to claim 3, it is characterized in that: described detection system also comprises the comparator circuit be connected with described humidity treatment circuit and the central processing circuit be connected with described comparator circuit, and described central processing circuit is also connected with described humidity treatment circuit.
5. capacitive high-voltage equipment insulation performance detecting system according to claim 4, is characterized in that: be provided with non-humidity-sensitive material between described capacitor plate.
6. capacitive high-voltage equipment insulation performance detecting system according to claim 5, is characterized in that: be provided with rectification circuit between described charging circuit output terminal and radiating circuit input end.
7. capacitive high-voltage equipment insulation performance detecting system according to claim 6, is characterized in that: described detection system also comprises the storer and display that are connected with described central processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420736115.2U CN204188764U (en) | 2014-11-28 | 2014-11-28 | Capacitive high-voltage equipment insulation performance detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420736115.2U CN204188764U (en) | 2014-11-28 | 2014-11-28 | Capacitive high-voltage equipment insulation performance detecting system |
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| CN204188764U true CN204188764U (en) | 2015-03-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004974A (en) * | 2015-07-14 | 2015-10-28 | 南车青岛四方机车车辆股份有限公司 | Real-time detection method and real-time detection system for insulating property of high-voltage insulator on top of Multiple Units |
| CN110716112A (en) * | 2019-11-15 | 2020-01-21 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
-
2014
- 2014-11-28 CN CN201420736115.2U patent/CN204188764U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004974A (en) * | 2015-07-14 | 2015-10-28 | 南车青岛四方机车车辆股份有限公司 | Real-time detection method and real-time detection system for insulating property of high-voltage insulator on top of Multiple Units |
| CN110716112A (en) * | 2019-11-15 | 2020-01-21 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
| CN110716112B (en) * | 2019-11-15 | 2022-01-25 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
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