CN209690433U - A kind of faulty insulator measuring device - Google Patents
A kind of faulty insulator measuring device Download PDFInfo
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- CN209690433U CN209690433U CN201920218127.9U CN201920218127U CN209690433U CN 209690433 U CN209690433 U CN 209690433U CN 201920218127 U CN201920218127 U CN 201920218127U CN 209690433 U CN209690433 U CN 209690433U
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- leakage current
- insulator
- current detection
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- 239000012212 insulator Substances 0.000 title claims abstract description 47
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 23
- 230000001681 protective effect Effects 0.000 claims description 16
- 238000009413 insulation Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model relates to a kind of faulty insulator measuring devices, in order to the detection accuracy for solving existing faulty insulator leakage current detection device is low, can not real-time detection the technical issues of.Technical solution is: a kind of faulty insulator measuring device, including leakage current detection device, wavelet threshold denoising device, digital comparator and signal transmitting apparatus；The leakage current detection device is connect with insulator, and the input terminal of the wavelet threshold denoising device is connect with the signal output end of leakage current detection device, and the input terminal of digital comparator is connect with the signal output end of wavelet threshold denoising device；The utility model acquires the leakage current of faulty insulator by using leakage current detection device, wavelet threshold denoising device is reused to be filtered noise signal, analysis finally is compared to leakage current signal, finally obtain insulator whether the conclusion of failure, can real-time monitoring, quick response, and have the advantages that high-precision and intelligence.
Description
Technical field
The utility model relates to a kind of faulty insulator measuring devices.
Background technique
Currently, insulator is influenced by voltage, humidity, filth etc. for a long time, tens microamperes to several hundred milliamperes can be generated
The leakage current signal of variation range, and discharging with high-frequency impulse therefore can be with by using leakage current detection device
In real time, the fault condition of economic detection insulator, but since insulator is influenced by forceful electric power magnetic environment and acquisition device itself,
A large amount of noise can be generated, it is low and can not real-time detection so as to cause existing leakage current detection device detection accuracy
Technical problem.
Utility model content
Purpose of the utility model is to solve the detection accuracy of existing faulty insulator leakage current detection device
It is low and can not real-time detection the technical issues of, a kind of faulty insulator measuring device is provided.
In order to solve the above technical problems, the technical solution adopted in the utility model is:
A kind of faulty insulator measuring device, including leakage current detection device, wavelet threshold denoising device, numerical value compare
Device and signal transmitting apparatus；The leakage current detection device is connect with insulator, the signal of the wavelet threshold denoising device
Input terminal is connect with the signal output end of leakage current detection device, the signal input part and wavelet threshold of the digital comparator
Denoise the signal output end connection of device, the signal input part of the signal transmitting apparatus and the signal output end of digital comparator
Connection；
The leakage current detection device is to carry out the amplitude of insulator leakage current, phase, discharge time signal
Detection is collected；
The wavelet threshold denoising device is the letter that will be detected from leakage current detection device using theory of wavelet transformation
Noise signal in number filters；
The digital comparator is that the signal after denoising is compared analysis with the signal of normal insulation, compares
As a result once being more than the safety margin of the permitted leakage current of normal insulation, that is, determine insulator breakdown；
The signal transmitting apparatus is to store the resulting result of digital comparator and send staff to.
Further, the leakage current detection device includes AC power source AC, transformer T, first capacitor C1, second
Capacitor C2, voltmeter V, first resistor R1, second resistance R2, 3rd resistor R3And protective ball gap, the primary side of the transformer T
It is connect with AC power source, secondary one end of the transformer T and first resistor R1One end connection, first resistor R1The other end
One end and first capacitor C with insulator1One end connection, the first capacitor C1With the second capacitor C2Series connection, the insulator
The other end and second resistance R2, 3rd resistor R3It is connected with one end of voltmeter, the second resistance R2With protective ball gap string
Connection, the 3rd resistor R3With concatenated second resistance R2In parallel with protective ball gap, voltmeter, the secondary of the transformer T is another
One end, the second capacitor C2The other end, 3rd resistor R3The other end of the other end, the protective ball gap other end and voltmeter is grounded.
Further, the wavelet threshold denoising device is the addition wavelet threshold denoising program in CVSD encoder
Embedded wavelet transform encoders.
Further, the signal transmitting apparatus includes microprocessor, image storage module, wireless transport module, letter
Number receiver and display, an input interface of the microprocessor and the signal output end of digital comparator connect, described
Image storage module is connect with microprocessor, and an output of the signal input part and microprocessor of the wireless transport module connects
Mouthful connection, the signal receiver is wirelessly connected with the wireless transmission module, the signal input part of the display with
The signal output end of signal receiver connects；
The microprocessor is used to handle and transmit the fault message of insulator；
The image storage module is used to store position and the fault condition of faulty insulator；
Fault-signal is sent to signal receiver using wireless mode by the wireless transport module；
The signal receiver is used to receive the signal of wireless transport module transmission；
The display is display screen, for showing on a display screen signal receiver received signal.
Further, the range of regulation of the transformer T is 50kVA/50kV.
Further, the first capacitor C1With the second capacitor C2Intrinsic standoff ratio be 2000:1.
The beneficial effects of the utility model are:
1, the utility model is reused small by using the leakage current of leakage current detection device acquisition faulty insulator
Wave threshold denoising device is filtered noise signal, is finally compared analysis to leakage current signal, finally obtains insulation
Son whether the conclusion of failure, can real-time monitoring, quick response, and have the advantages that high-precision and intelligent；
2, the utility model structure is simple, operates conveniently, and can be widely applied to the detection of the Ageing of Insulators.
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model leakage current detection device；
Fig. 3 is the block diagram of the utility model signal transmitting apparatus.
Specific embodiment
The utility model is further described with reference to the accompanying drawings and examples.
As shown in Figure 1-3, one of the present embodiment faulty insulator measuring device, including leakage current detection device,
Wavelet threshold denoising device, digital comparator and signal transmitting apparatus；The leakage current detection device is connect with insulator, institute
The signal input part for stating wavelet threshold denoising device is connect with the signal output end of leakage current detection device, and the numerical value compares
The signal input part of device is connect with the signal output end of wavelet threshold denoising device, the signal input part of the signal transmitting apparatus
It is connect with the signal output end of digital comparator；
The leakage current detection device is to carry out the amplitude of insulator leakage current, phase, discharge time signal
Detection is collected；
The wavelet threshold denoising device is the letter that will be detected from leakage current detection device using theory of wavelet transformation
Noise signal in number filters；
The digital comparator is that the signal after denoising is compared analysis with the signal of normal insulation, compares
As a result once being more than the safety margin of the permitted leakage current of normal insulation, that is, determine insulator breakdown；
The signal transmitting apparatus is to store the resulting result of digital comparator and send staff to.
The leakage current detection device includes AC power source AC, transformer T, first capacitor C1, the second capacitor C2, electricity
Press Table V, first resistor R1, second resistance R2, 3rd resistor R3And protective ball gap, the primary side and AC power source of the transformer T
Connection, secondary one end of the transformer T and first resistor R1One end connection, first resistor R1The other end and insulator
One end and first capacitor C1One end connection, the first capacitor C1With the second capacitor C2Series connection, the other end of the insulator with
Second resistance R2, 3rd resistor R3It is connected with one end of voltmeter, the second resistance R2It connects with protective ball gap, described
Three resistance R3With concatenated second resistance R2It is in parallel with protective ball gap, voltmeter, the secondary other end of the transformer T, the second electricity
Hold C2The other end, 3rd resistor R3The other end of the other end, the protective ball gap other end and voltmeter is grounded.
The transformer T, for alternating current to be changed into direct current, the range of regulation of the transformer is 50kVA/
50kV；The first capacitor divider C1With the second capacitive divider C2, for the voltage after testing transformer pressure regulation to be passed through electricity
Hold voltage divider, the first capacitor divider C1With the second capacitive divider C2Intrinsic standoff ratio be 2000:1；The voltmeter
V, the voltage value by measuring low pressure obtain the discharge voltage of insulator；The 3rd resistor R3To measure resistance, with insulation
Substring connection obtains the leakage current of insulator by reading the voltage and current of measurement resistance；The first resistor R1With second
Resistance R2For protective resistance, first resistor R1For the protective resistance of circuit, second resistance R2For protecting protective ball gap, can prevent
Damage of the dash current that transcient short circuit time generates to measuring device, described two protective resistances are 5k Ω；
The wavelet threshold denoising device is that the embedded small of wavelet threshold denoising program is added in CVSD encoder
Wave conversion encoder.
The signal transmitting apparatus include microprocessor, image storage module, wireless transport module, signal receiver and
Display, an input interface of the microprocessor and the signal output end of digital comparator connect, and described image stores mould
Block is connect with microprocessor, and the signal input part of the wireless transport module and an output interface of microprocessor connect, institute
It states signal receiver to be wirelessly connected with the wireless transmission module, the signal input part and signal receiver of the display
Signal output end connection；
The microprocessor is used to handle and transmit the fault message of insulator, the model of microprocessor
MAX705CSA；
The image storage module is used to store position and the fault condition of faulty insulator, using depositing for SDRAM
Reservoir；
Fault-signal is sent to signal receiver using wireless mode by the wireless transport module, using Huawei
GTM9000GPRS module, working frequency range are EGSM900/GSM1800 double frequency；Maximum transmission power is EGSM900/
GT800Class4 (2W), compatible GSM/GPRS Phase 2/2+；Support Huawei GT800 agreement.
The signal receiver is used to receive the signal of wireless transport module transmission, using the wireless communication of model FA233W
Number receiving module；
The display is display screen, for showing on a display screen signal receiver received signal, is used
TFT-LCD colour industrial liquid crystal display.
Claims (6)
1. a kind of faulty insulator measuring device, it is characterised in that: filled including leakage current detection device, wavelet threshold denoising
It sets, digital comparator and signal transmitting apparatus；The leakage current detection device is connect with insulator, the wavelet threshold denoising
The signal input part of device is connect with the signal output end of leakage current detection device, the signal input part of the digital comparator
It is connect with the signal output end of wavelet threshold denoising device, the signal input part of the signal transmitting apparatus and digital comparator
Signal output end connection；
The leakage current detection device is to detect the amplitude of insulator leakage current, phase, discharge time signal
It collects；
The wavelet threshold denoising device, being will be from the signal that leakage current detection device detects using theory of wavelet transformation
Noise signal filter；
The digital comparator is that the signal after denoising is compared analysis, comparison result with the signal of normal insulation
Once being more than the safety margin of the permitted leakage current of normal insulation, that is, determine insulator breakdown；
The signal transmitting apparatus is to store the resulting result of digital comparator and send staff to.
2. a kind of faulty insulator measuring device according to claim 1, it is characterised in that: the leakage current detection
Device includes AC power source AC, transformer T, first capacitor C1, the second capacitor C2, voltmeter V, first resistor R1, second resistance
R2, 3rd resistor R3And protective ball gap, the primary side of the transformer T are connect with AC power source, the secondary one of the transformer T
End and first resistor R1One end connection, first resistor R1The other end and insulator one end and first capacitor C1One end connect
It connects, the first capacitor C1With the second capacitor C2Series connection, the other end and second resistance R of insulator2, 3rd resistor R3And voltage
One end of Table V connects, the second resistance R2It connects with protective ball gap, the 3rd resistor R3With concatenated second resistance R2With
Protective ball gap, voltmeter V are in parallel, the secondary other end of the transformer T, the second capacitor C2The other end, 3rd resistor R3It is another
The other end ground connection at end, the protective ball gap other end and voltmeter V.
3. a kind of faulty insulator measuring device according to claim 1, it is characterised in that: the wavelet threshold denoising
Device is the embedded wavelet transform encoders that wavelet threshold denoising program is added in CVSD encoder.
4. a kind of faulty insulator measuring device according to claim 1, it is characterised in that: the signal transmitting apparatus
Including microprocessor, image storage module, wireless transport module, signal receiver and display, one of the microprocessor
The connection of the signal output end of input interface and digital comparator, described image memory module are connect with microprocessor, described wireless
One output interface of the signal input part of transmission module and microprocessor connects, the signal receiver wirelessly with
Wireless transport module connection, the signal input part of the display and the signal output end of signal receiver connect；
The microprocessor is used to handle and transmit the fault message of insulator；
The image storage module is used to store position and the fault condition of faulty insulator；
Fault-signal is sent to signal receiver using wireless mode by the wireless transport module；
The signal receiver is used to receive the signal of wireless transport module transmission；
The display is display screen, for showing on a display screen signal receiver received signal.
5. a kind of faulty insulator measuring device according to claim 2, it is characterised in that: the pressure regulation of the transformer T
Range is 50kVA/50kV.
6. a kind of faulty insulator measuring device according to claim 2, it is characterised in that: the first capacitor C1With
Two capacitor C2Intrinsic standoff ratio be 2000:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218127.9U CN209690433U (en) | 2019-02-19 | 2019-02-19 | A kind of faulty insulator measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920218127.9U CN209690433U (en) | 2019-02-19 | 2019-02-19 | A kind of faulty insulator measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN209690433U true CN209690433U (en) | 2019-11-26 |
Family
ID=68602347
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920218127.9U Active CN209690433U (en) | 2019-02-19 | 2019-02-19 | A kind of faulty insulator measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698163A (en) * | 2020-12-09 | 2021-04-23 | 国网江苏省电力有限公司盐城供电分公司 | Insulator discharge fault detection and positioning method |
-
2019
- 2019-02-19 CN CN201920218127.9U patent/CN209690433U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112698163A (en) * | 2020-12-09 | 2021-04-23 | 国网江苏省电力有限公司盐城供电分公司 | Insulator discharge fault detection and positioning method |
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