CN207232367U - A kind of jamproof inspection circuit of partial discharge of transformer high-frequency test instrument - Google Patents
A kind of jamproof inspection circuit of partial discharge of transformer high-frequency test instrument Download PDFInfo
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- CN207232367U CN207232367U CN201721047931.2U CN201721047931U CN207232367U CN 207232367 U CN207232367 U CN 207232367U CN 201721047931 U CN201721047931 U CN 201721047931U CN 207232367 U CN207232367 U CN 207232367U
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Abstract
The utility model belongs to status of electric power detection and fault diagnosis technology field, more particularly to a kind of jamproof inspection circuit of partial discharge of transformer high-frequency test instrument, steep-sided pulse signal generator, injection capacitance, high frequency sensors, sinusoidal signal generator, resistance, tested shelf depreciation high-frequency test instrument are specifically included；The utility model creatively produces pulse current and the pulsed current signal in circuit is examined using the detection of shelf depreciation high-frequency test instrument in the case that sinusoidal signal generator produces interference electric current using steep-sided pulse signal generator, realize the anti-interference of detection shelf depreciation high-frequency test instrument, the problem for being difficult to detect shelf depreciation high-frequency test instrument key technical index has thoroughly been captured, has promoted the lean management for improving Transformer's Condition Monitoring equipment quality horizontal.
Description
Technical field
The utility model belongs to status of electric power detection and fault diagnosis technology field, and in particular to a kind of transformer partial
Discharge the jamproof inspection circuit of high-frequency test instrument in portion.
Background technology
Safe and stable operation of the live detection effect relation of shelf depreciation high-frequency test instrument to power transformer.Pass through
The pulse signal of shelf depreciation high-frequency test instrument detection transformer can characterize the degradation trend of its state of insulation, but detection result
The background interference noise of substation field is limited by, sensitivity and the accuracy of shelf depreciation high-frequency test instrument will be influenced.
Since transformer is in a strong electromagnetic interference environment, serious electromagnetic interference greatly reduces sensitive monitoring
Degree, sometimes even so that measurement can not carry out.Therefore, can partial discharge monitoring system or live detection instrument effectively normally be transported
OK, key is that success suppresses interference.Since the interference mode at scene is varied, company can be divided into by time domain signal characteristics
Continuous PERIODIC INTERFERENCE, impulse disturbances and white noise acoustic jamming.The part of the stochastic pulse interferences such as external discharge and inside transformer
The feature discharged on time domain, frequency domain is about the same, to reject such interference, it is necessary to take measures on hardware and software,
Be possible to realize and suppress external discharge interference.It can be seen that the interference free performance of shelf depreciation high-frequency test instrument determines local put
The field application of electric high-frequency test instrument is horizontal and leakage alarm whether occurs during transformer belt electro-detection or alerts by mistake.
In consideration of it, it is necessary to develop, the inspection circuit using set of high frequency partial discharge test instrument anti-interference, product
Control examines whether the key technical index of high frequency partial discharge test instrument reaches the requirement of technical specification.
The content of the invention
To solve the above-mentioned problems, it is anti-interference to provide a kind of partial discharge of transformer high-frequency test instrument for the utility model
Inspection circuit, concrete technical scheme is as follows：
A kind of partial discharge of transformer high-frequency test instrument is jamproof to examine circuit to include steep-sided pulse signal generator, note
Enter capacitance, high frequency sensors, sinusoidal signal generator, resistance, tested shelf depreciation high-frequency test instrument；The steep-sided pulse signal
Generator and injection capacitance connection, injection capacitance are connected with high frequency sensors, and high frequency sensors are connected with steep-sided pulse signal；It is sinusoidal
Signal generator is connected with resistance, and resistance is connected with high frequency sensors, and high frequency sensors are connected with sinusoidal signal；Tested part is put
Electric high-frequency test instrument and the output terminal of high frequency sensors connect.
Further, the signal output cable of the steep-sided pulse signal generator is connected in series with injection capacitance；The signal
Output cable punching accesses high frequency sensors.
Further, the sinusoidal signal generator is connected in series with resistance by coaxial cable；The screen of the coaxial cable
Cover line punching access high frequency sensors.
Further, the steep-sided pulse signal generator is using 81110 serial pulse signal generators.
Further, the injection capacitance is the ceramic condenser that capacity is 100 pico farads.
Further, the high frequency sensors are the hollow circular High Frequency Current Sensors based on Rogowski coil.
Further, the sinusoidal signal generator is using 33622 serial signal generators.
Further, the resistance value of the resistance is 50 ohm.
The utility model it is a technical advantage that
1）Creatively realize and surveyed by examining the pulsed current signal in circuit and qualitative analysis shelf depreciation high frequency
The antijamming capability of test instrument, realizes the anti-interference of detection shelf depreciation high-frequency test instrument, has thoroughly captured and be difficult to examine
The problem of shelf depreciation high-frequency test instrument key technical index is surveyed, promotes to improve the essence of Transformer's Condition Monitoring equipment quality
Beneficial management level；
2）The product control verifying bench for ensureing shelf depreciation high frequency measuring instrument antijamming capability, effectively prevention are successfully built
Carry out the Transformer's Condition Monitoring time-frequency unfavorable phenomenon that now alarm, leakage alert by mistake, reach risk, efficiency and cost at one stroke
Synthesis is optimal.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Wherein：1：Steep-sided pulse signal generator, 2：Inject capacitance, 3：High frequency sensors, 4：Sinusoidal signal generator, 5：Electricity
Resistance, 6：Tested shelf depreciation high-frequency test instrument.
Embodiment
In order to be better understood from the utility model, the utility model is made with specific embodiment below in conjunction with the accompanying drawings further
Explanation：
Circuit is examined to believe including steep-sided pulse as shown in Figure 1, a kind of partial discharge of transformer high-frequency test instrument is jamproof
Number generator 1, injection capacitance 2, high frequency sensors 3, sinusoidal signal generator 4, resistance 5, tested shelf depreciation high frequency measuring instrument
Device 6；The signal output cable of steep-sided pulse signal generator 1 is connected in series with injection capacitance 2, and the access of signal output cable punching is high
Video sensor 3；Sinusoidal signal generator 4 is connected in series with resistance 5 by coaxial cable, the shielding line punching access of coaxial cable
High frequency sensors 3；Tested shelf depreciation high-frequency test instrument 6 is connected with the output terminal of high frequency sensors 3.
For steep-sided pulse signal generator 1 using the pulse signal generator of 81110 series, its reference frequency output is 100,000
Hertz is to 120 megahertzs, and output impedance is 50 ohm, and die-away time was not less than for 200 nanoseconds, and rising edge of a pulse was not more than for 5 nanoseconds.
Injection capacitance 2 is the ceramic condenser that capacity is 100 pico farads.High frequency sensors 3 are based on Rogowski coil
Hollow circular High Frequency Current Sensor.
Sinusoidal signal generator 4 using 33622 series signal generators, its reference frequency output be 100 kHz extremely
120 megahertzs, output impedance is 50 ohm, and the amplitude range of the sine-wave current of output is 5 to 50 milliamperes, and adjusts step-length and be
0.5 milliampere.The resistance value of resistance 5 is 50 ohm.
The laboratory ambient temperature of the utility model is 15 to 35 degrees Celsius, and relative humidity is 25% to 75%, atmospheric pressure
Power is 86 to 106 kPas.
The operation principle of the utility model is described further below：
（1）The signal output cable connection of steep-sided pulse signal generator 1 is injected into capacitance 2 and passes through high frequency sensors 3；Suddenly
1 voltage pulse output signal of pulse signal generator, by injecting capacitance 2Pulse electricity is produced in circuit is examined afterwards
Stream, simulating apparent charge amount isLocal discharge signal, wherein；
（2）Interference signal source is used as using sinusoidal signal generator 4, sinusoidal signal generator 4 passes through a coaxial cable
Concatenate the resistance 5 that resistance value is 50 ohm, the shielding line punching access high frequency sensors 3 of coaxial cable；Sinusoidal signal generator 4 is logical
Cross the interference electric current that resistance 5 produces different frequency；
（3）The output of high frequency sensors 3 is connected to the signal transmission passage of tested shelf depreciation high-frequency test instrument 6；
Shelf depreciation high-frequency test instrument 6 is tested to detect the pulse current examined in circuit；It is defeated in sinusoidal signal generator 4
In the case of the interference electric current for going out any given frequency, it is allowed to the filter function of the tested shelf depreciation high-frequency test instrument 6 of adjustment；
（4）The output frequency of sinusoidal signal generator 4 is adjusted to obtain the interference electric current of different frequency, record apparent electricity
Lotus amount, interference electric currentPeak-to-peak value, and the inspection that detects of corresponding tested shelf depreciation high-frequency test instrument 6 returns
Pulse current in roadWith injecting capacitance 2The pulse current produced in circuit is examinedSignal-to-noise ratio, i.e.,The frequency selected as of the interference electric current of the output of sinusoidal signal generator 4：50kHz、500kHz、1MHz、2MHz、
5MHz、10MHz、15MHz、20MHz、25MHz、30MHz、35MHz、40MHz；
（5）When the output frequency of adjustment sinusoidal signal generator 4 is to obtain the interference electric current of different frequencyWhen, judge institute
The pulse current examined in circuit that the tested shelf depreciation high-frequency test instrument 6 of record detectsWith injecting capacitance 2
The pulse current produced in circuit is examinedSignal-to-noise ratioStated with bid response material or product description
Whether anti-interference is consistent, and then judges whether tested shelf depreciation high-frequency test instrument 6 is qualified.Such as when apparent charge amount
For 50 skin storehouses, interference electric currentPeak-to-peak value be 25 milliampere hour, be tested shelf depreciation high-frequency test instrument 6 can with not less than
2：1 signal-to-noise ratio shows pulsed current signal, i.e.,。
The utility model is not limited to above-described embodiment, and the foregoing is merely the preferable of the utility model
Case study on implementation, is not intended to limit the utility model, and that is made where within the spirit and principles of the present invention is any
Modifications, equivalent substitutions and improvements etc., should be included within the scope of protection of this utility model.
Claims (8)
- A kind of 1. jamproof inspection circuit of partial discharge of transformer high-frequency test instrument, it is characterised in that：Believe including steep-sided pulse Number generator, injection capacitance, high frequency sensors, sinusoidal signal generator, resistance, tested shelf depreciation high-frequency test instrument；Institute Steep-sided pulse signal generator and injection capacitance connection are stated, injection capacitance is connected with high frequency sensors, high frequency sensors and steep-sided pulse Signal connects；Sinusoidal signal generator is connected with resistance, and resistance is connected with high frequency sensors, and high frequency sensors connect with sinusoidal signal Connect；Tested shelf depreciation high-frequency test instrument and the output terminal of high frequency sensors connect.
- 2. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The signal output cable of the steep-sided pulse signal generator is connected in series with injection capacitance；The signal output cable Punching accesses high frequency sensors.
- 3. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The sinusoidal signal generator is connected in series with resistance by coaxial cable；The shielding line punching of the coaxial cable Access high frequency sensors.
- 4. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The steep-sided pulse signal generator is using 81110 serial pulse signal generators.
- 5. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The injection capacitance is the ceramic condenser that capacity is 100 pico farads.
- 6. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The high frequency sensors are the hollow circular High Frequency Current Sensors based on Rogowski coil.
- 7. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The sinusoidal signal generator is using 33622 serial signal generators.
- 8. the jamproof inspection circuit of a kind of partial discharge of transformer high-frequency test instrument according to claim 1, it is special Sign is：The resistance value of the resistance is 50 ohm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047931.2U CN207232367U (en) | 2017-08-21 | 2017-08-21 | A kind of jamproof inspection circuit of partial discharge of transformer high-frequency test instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047931.2U CN207232367U (en) | 2017-08-21 | 2017-08-21 | A kind of jamproof inspection circuit of partial discharge of transformer high-frequency test instrument |
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| CN207232367U true CN207232367U (en) | 2018-04-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239558A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111239559A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111537935A (en) * | 2020-06-11 | 2020-08-14 | 国网宁夏电力有限公司电力科学研究院 | High-frequency partial discharge anti-interference function verification method and system |
| CN111722169A (en) * | 2020-06-10 | 2020-09-29 | 深圳供电局有限公司 | Anti-interference performance detection device and method of high-frequency partial discharge detector |
-
2017
- 2017-08-21 CN CN201721047931.2U patent/CN207232367U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111239558A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111239559A (en) * | 2020-02-06 | 2020-06-05 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111239558B (en) * | 2020-02-06 | 2022-01-25 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111239559B (en) * | 2020-02-06 | 2022-04-12 | 云南电网有限责任公司电力科学研究院 | Online measurement method for equivalent discharge capacity of line fault arc |
| CN111722169A (en) * | 2020-06-10 | 2020-09-29 | 深圳供电局有限公司 | Anti-interference performance detection device and method of high-frequency partial discharge detector |
| CN111537935A (en) * | 2020-06-11 | 2020-08-14 | 国网宁夏电力有限公司电力科学研究院 | High-frequency partial discharge anti-interference function verification method and system |
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