CN2624214Y - On-line monitoring device for dielectric loss and capacitance of portable capacitor device - Google Patents
On-line monitoring device for dielectric loss and capacitance of portable capacitor device Download PDFInfo
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- CN2624214Y CN2624214Y CN 03234975 CN03234975U CN2624214Y CN 2624214 Y CN2624214 Y CN 2624214Y CN 03234975 CN03234975 CN 03234975 CN 03234975 U CN03234975 U CN 03234975U CN 2624214 Y CN2624214 Y CN 2624214Y
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Abstract
The utility model discloses a dielectric loss and capacitance inline monitoring device of portable capacitive device, which comprises a passive current sensor (1), an anti jamming signal transmission line (3), a signal collector (5), a waveform processor (6), a signal processing controller (7), a voltage sensor (8), an instruction input unit (10), a storage cell (11) and a display unit (12). The output end of the passive current sensor is connected with the input end of the anti jamming signal transmission line; the outputs of the anti jamming signal transmission line and the voltage sensor are connected respectively with the input end of the signal collector; the output end of the signal collector is connected with the input end of the waveform processor; the output end of the waveform processor is connected with the signal processing controller; the instruction input unit and the storage cell are connected respectively with the signal processing controller; the output end of the signal processing controller is connected with the display unit. The utility model has the advantages of automatic calibration function, high stability, quick measuring speed, moreover, the utility model can conduct random measuring under the condition of power cut, and has simple operation and convenient carry.
Description
Technical field
Defeated, distribution system measurement mechanism technical field that the utility model belongs to, the especially device that dielectric loss and metal oxide arrester characteristic are carried out live line measurement.
Background technology
Because the inherent characteristic of electron device, dielectric loss live line measurement device in the past all are easy to be subjected to temperature, when using external factor such as electromagnetic interference (EMI) influence and reduce its accuracy of measurement, must often carry out the accuracy verification to device.And the live line measurement device is to use together with sensor.In defeated, distribution system, sensor often is installed on the high-tension apparatus, and dismounting and installation are all very inconvenient, therefore, to in the past dielectric loss live line measurement device carry out field calibration hardly may, this also is to influence this type of to install widely used greatest factor.Because various electromagnetic interference (EMI) are very serious in defeated, distribution system, the various high-tension apparatuses that need to detect are at a distance of far away to hundreds of rice tens again, therefore and the signal that will gather is very faint, must export enough big electric current as the sensor of acquired signal or sufficiently high voltage is eliminated various interference.Use signal transmssion line in the past, just must adopt active sensor that the signal of gathering is amplified and can achieve the goal, and not confirmability is arranged the serviceable life of active device,, under charged situation, be difficult to change and keep in repair in case be damaged.Add active component in the active sensor and be subjected to the influence of unfavorable factors such as temperature, working time, thunderbolt, be easy to make its characteristic to change, this not only directly influences measuring accuracy, also have influence on the reliability of entire measuring device, very inconvenient in actual use, when serious even can lose using value.
Summary of the invention
The purpose of this utility model provides anti-interference signal transmssion line of a kind of employing and passive sensor in order to overcome above-mentioned the deficiencies in the prior art just, and automatic calibration function is arranged, make accurate, easy and simple to handle, the safe and reliable portable capacitive equipment dielectric of measurement result undermine the electric capacity on-Line Monitor Device.
The purpose of this utility model is achieved by the following technical solution.
The utility model is by the passive electrical flow sensor, anti-interference signal transmssion line, signal picker, waveform processor, signal processing controller, voltage sensor, the instruction input block, storage unit, display unit is formed, the end that goes out of passive electrical flow sensor is connected with the end of going into of anti-interference signal transmssion line, the end that goes out of anti-interference signal transmssion line and voltage sensor is connected with the end of going into of signal picker respectively, the end of going into that goes out end connection waveform processor of signal picker, the end that goes out of waveform processor connects signal processing controller, the instruction input block also is connected with signal processing controller respectively with storage unit, goes out end connection display unit at signal processing controller.
The utility model is provided with electronic commutator, the end of going into of this electronic commutator is connected with voltage sensor with anti-interference signal transmssion line respectively, going out end is connected with signal picker, also be provided with a standard verification unit in addition and insert electronic commutator, in the standard verification unit, be provided with the standard checking circuit; Described anti-interference signal transmssion line is made of signal shielding cable and anti-interference and signal amplification circuit, and anti-interference and signal amplification circuit places between the two ends of signal shielding cable; The end that goes out at signal processing controller also is connected with printer or interface.
The utility model is owing to designed standard checking circuit and anti-interference signal transmssion line, the standard verification unit can realize the automatic calibration to sensor and measurement mechanism, can not be subjected to the accuracy of the influence assurance measurement of any external environment condition, adopt anti-interference signal transmssion line can reach the purpose that adopts the passive electrical flow sensor, give full play to passive sensor reliability height, stable performance, precision height, long advantage of life-span, thereby improve stability, reliability and the accuracy of measurement mechanism.Advantages such as that this device has is easy and simple to handle, reliability is high, measuring speed is fast, be easy to carry, need not have a power failure, measure at any time, equipment installation cost is cheap.
Below, further set forth the utility model in conjunction with Figure of description.
Description of drawings
Fig. 1 is a structure principle chart of the present utility model;
Fig. 2 is one of circuit theory diagrams of anti-interference signal transmssion line;
Fig. 3 be anti-interference signal transmssion line circuit theory diagrams two;
Fig. 4 is the standard checking circuit schematic diagram of standard verification unit;
Fig. 5 is an on-line monitoring schematic diagram of the present utility model;
Fig. 6 is a shape assumption diagram of the present utility model.
Embodiment
At first as Fig. 2 or shown in Figure 3, adopt the anti-interference and signal amplification circuit I of commercially available fabrication of electronic components, two ends constitute anti-interference signal transmssion line 3 after connecting signal shielding cable 2, and the value of each element is referenced as R among the anti-interference and signal amplification circuit I of Fig. 2
11K Ω, R
2100K Ω, R
310K Ω, R
450K Ω, R
51K Ω, R
61K Ω, the value of each element is referenced as R among the anti-interference and signal amplification circuit I of Fig. 3
1100K Ω, R
2100K Ω, R
35K Ω, R
410K Ω, R
5900 Ω, R
610K Ω, R
71K Ω, R
81K Ω, C50PF; Adopt the standard checking circuit in the commercially available fabrication of electronic components standard verification unit 9 as shown in Figure 4, the value of each element is referenced as R50 Ω, C in the circuit
14 μ F, C
24Mf connects 3～80 volts voltage at the U end.Electronic component can be an integrated circuit (IC)-components, also can be discrete device.Then as shown in Figure 1 with passive electrical flow sensor 1, anti-interference signal transmssion line 3, electronic commutator 4, signal picker 5, waveform processor 6, signal processing controller 7, voltage sensor 8, standard verification unit 9, instruction input block 10, storage unit 11, display unit 12 is electrically connected, passive electrical flow sensor 1 is connected with the end of going into of anti-interference signal transmssion line 3, anti-interference signal transmssion line 3, voltage sensor 8, the end that goes out of standard verification unit 9 is connected with the end of going into of electronic commutator 4 respectively, the end of going into that goes out end connection signal picker 5 of electronic commutator 4 connects, the end of going into that goes out end connection waveform processor 6 of signal picker 5, the end that goes out of waveform processor 6 connects signal processing controller 7, instruction input block 10 also is connected with signal processing controller 7 respectively with storage unit 11, goes out end connection display unit 12 at signal processing controller 7, printer 13 or interface 14.The course of work is as follows: under the conversion of the electronic commutator of being controlled by signal processing controller 74, the standard signal that standard verification unit 9 is sent compares with standard value through signal picker 5, waveform processor 6 backs, and in the control of signal processing controller 7, error amount is sent into storage unit 11 automatically, at this moment, device is calibrated automatically.When instruction input block 10 has the instruction input, passive electrical flow sensor 1 is obtained measured signal, carry out current/voltage-converted and amplify the back being connected by anti-interference signal transmssion line 3 with electronic commutator 4, after signal picker 5, waveform processor 6, signal processing controller 7 is after the deduction error, obtain measurement result accurately, and on display unit 12, show, also can be transferred to other computing machine by printer 13 printings or by interface 14.
The verification unit if the utility model does not set up standard still can be used preferably, and just its measuring accuracy can descend to some extent.
On-line monitoring principle of the present utility model as shown in the figure, its principle of work is: circuit (I) is done to output to loop input impedance transducer part (II) after difference is amplified to the sensor signal of receiving, to improve input impedance, and offset big direct current offset, afterwards, signal is imported five rank bandpass filter (III), leach the part height, import again behind the low-frequency interference signal in the high Q value of the second order bandpass filter (IV), further leach undesired signal near power frequency, last incoming wave shape transformer (V) is the square-wave signal that computing machine can accurately be discerned with pure sinusoid signal transformation.
For improving reliability and strengthening anti-interferencely, use the sealed monolithic shell of double-layer aluminium alloy for the sensor of long-term operation out of doors, rainproof to satisfy, moistureproof, prevent dust and the effect of electromagnetic screen.
The utility model can use two kinds of measuring methods, be absolute measurement and relative measurement, so-called absolute measurement is exactly to consider that the reference voltage of measurement is to be obtained by the PT secondary side, the data that record can have certain zero-error because of the angular difference that PT itself has, therefore need carry out zero point correction to instrument, as being worth the zero point of all measurement data later on, the true measurement of test product should be that reading adds the zero point correction value with the zero point correction value; So-called relative measurement is exactly to consider the influence that does not have PT, just selects the reference test product of a homophase for use, measures and will measure test product and poor with reference to the current angle between the test product, and true measurement should be reading and adds value with reference to test product.
Profile structural map of the present utility model is a case structure shown in Figure 6.Using method is: with its ground wire 15 ground connection, in the time of absolute measurement, PT port one 6 is connect the PT secondary side, 1# electric current port 17 connects the current sensor of test specimen, and 2# electric current port 18 is empty need not; During relative measurement, the PT port empty need not, 1# electric current port and 2# electric current port are connected two test product current sensors of same phase respectively.Choose metering system from metering system button 19,20, turn on the power switch 21, display screen 22 big dielectric loss value and the electric capacitys that after 3 seconds, show test product.23 is the battery charge display lamp, and 24 is fuse, and 25 is the computer output interface, and 26 is power input socket, and 27 is test product type selecting switch.The utility model can chargedly carry out on-line testing.After the point that all need be measured in the transformer station is all installed sensor, promptly can be regardless of time, monitor test product at any time.Chargeable battery is powered in its use machine, will connect the trouble of AC power when both having avoided on-the-spot the use, and the filter out power loop makes measurement result more accurate to the interference of equipment better again.The utility model uses high-quality components and parts, adopts the symmetric design mode, and takes technical measures such as frequency correction, filtering, sensor double layer screen, and on-the-spot antijamming capability is strengthened greatly, has guaranteed measuring stability.
In a word, the utlity model has advantages such as simple to operate, that stability is high, measuring speed is fast, be easy to carry, need not have a power failure, measure at any time, equipment installation cost is cheap.
Claims (4)
1, portable capacitive equipment dielectric undermines the electric capacity on-Line Monitor Device, it is characterized in that, it is by passive electrical flow sensor (1), anti-interference signal transmssion line (3), signal picker (5), waveform processor (6), signal processing controller (7), voltage sensor (8), instruction input block (10), storage unit (11), display unit (12) is formed, the end that goes out of passive electrical flow sensor (1) is connected with the end of going into of anti-interference signal transmssion line (3), the end that goes out of anti-interference signal transmssion line (3) and voltage sensor (8) is connected with the end of going into of signal picker (5) respectively, the end of going into that goes out end connection waveform processor (6) of signal picker (5), the end that goes out of waveform processor (6) connects signal processing controller (7), instruction input block (10) also is connected with signal processing controller (7) respectively with storage unit (11), go out to hold connection display unit (12) at signal processing controller (7).
2, portable capacitive equipment dielectric according to claim 1 undermines the electric capacity on-Line Monitor Device, it is characterized in that, be provided with electronic commutator (4), the end of going into of this electronic commutator (4) is connected with voltage sensor (8) with anti-interference signal transmssion line (3) respectively, going out end is connected with signal picker (5), also be provided with a standard verification unit (9) in addition and insert electronic commutator (4), in standard verification unit (9), be provided with the standard checking circuit.
3, portable capacitive equipment dielectric according to claim 1 and 2 undermines the electric capacity on-Line Monitor Device, it is characterized in that, described anti-interference signal transmssion line (3) is by signal shielding cable (2) and anti-interference and signal amplification circuit (I) formation, and anti-interference and signal amplification circuit (I) places between the two ends of signal shielding cable (2).
4, portable capacitive equipment dielectric according to claim 1 undermines the electric capacity on-Line Monitor Device, it is characterized in that, also is connected with printer (13) or interface (14) at the end that goes out of signal processing controller (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234975 CN2624214Y (en) | 2003-06-14 | 2003-06-14 | On-line monitoring device for dielectric loss and capacitance of portable capacitor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03234975 CN2624214Y (en) | 2003-06-14 | 2003-06-14 | On-line monitoring device for dielectric loss and capacitance of portable capacitor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2624214Y true CN2624214Y (en) | 2004-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03234975 Expired - Fee Related CN2624214Y (en) | 2003-06-14 | 2003-06-14 | On-line monitoring device for dielectric loss and capacitance of portable capacitor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2624214Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535681C (en) * | 2006-04-17 | 2009-09-02 | 中国科学院半导体研究所 | On-line calibration and checking method for current inductor transformation ratio and angle difference |
| CN103116150A (en) * | 2013-01-30 | 2013-05-22 | 中国电力科学研究院 | Verifying device of insulated online monitoring equipment of oxide arrester |
-
2003
- 2003-06-14 CN CN 03234975 patent/CN2624214Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535681C (en) * | 2006-04-17 | 2009-09-02 | 中国科学院半导体研究所 | On-line calibration and checking method for current inductor transformation ratio and angle difference |
| CN103116150A (en) * | 2013-01-30 | 2013-05-22 | 中国电力科学研究院 | Verifying device of insulated online monitoring equipment of oxide arrester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040707 Termination date: 20110614 |