CN207232372U - A kind of detection device of instrument for measuring partial discharge's device position error - Google Patents
A kind of detection device of instrument for measuring partial discharge's device position error Download PDFInfo
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- CN207232372U CN207232372U CN201721143551.9U CN201721143551U CN207232372U CN 207232372 U CN207232372 U CN 207232372U CN 201721143551 U CN201721143551 U CN 201721143551U CN 207232372 U CN207232372 U CN 207232372U
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- partial discharge
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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 detection device of instrument for measuring partial discharge's device position error, signal generator, build-out resistor, sensor loading panel, reference sensor, tested sensor, tested instrument for measuring partial discharge are specifically included；Signal generator is connected with build-out resistor, sensor loading panel, tested instrument for measuring partial discharge respectively；Reference sensor, tested sensor are fixedly installed on sensor loading panel, and tested sensor is closer to the junction of signal generator and sensor loading panel compared to reference sensor；Reference sensor, tested sensor are connected with tested instrument for measuring partial discharge respectively, sensor and the sequencing of reference sensor measured signal arrival are tested by comparative analysis, and then realize and judge that transient earth voltage tester whether there is position error, transient earth voltage tester performance issue present in engineer application is found early, so as to achieve the purpose that the apparatus insulated abnormal states of high-voltage electrical apparatus such as timely detection, early warning high-tension switch cabinet.
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 shelf depreciation
The detection device of test equipment position error.
Background technology
The high-tension switch cabinet of extensive application is the most direct equipment towards distribution and user, be directly related to power supply quality and
Power supply reliability.High-tension switch cabinet as the important power supply unit being widely used at present, there are it is large number of, cost is relatively low, prison
Survey the characteristics of cost is very high.Effect and distribution situation from high-tension switch cabinet, it is reliable that its insulation fault seriously affects electricity consumption
Property, and existing high-tension switch cabinet periodical power failure prerun system is longer because of its experiment period distances, it is difficult to find to go out at random in time
The defects of existing.And from analysis of statistical results, its major failure type is insulation and current-carrying failure.The above situation can pass through office
Portion's electric discharge live detection is found.
Rule of thumb summarize, traditional detection method for local discharge there is certain limitation, can not it is comprehensive, objective,
, even there is erroneous judgement sometimes in the operation conditions of the real tested equipment of reflection.Wherein Electromagnetic Wave Detection method is put for external insulation
Electricity is insensitive, and ultrasonic wave is decayed greatly in communication process.Acoustic wave detection is to more sensitive to media type；But easily by scene
The interference of mechanical oscillation；Positioning accuracy is influenced by phenomena such as internal reflection, refraction, but relatively low to equipment precision requirement；Propagate
Process decay is big.Wherein, transient state voltage-to-ground method is a kind of new detection means, it is the product of shelf depreciation, is included not
With the discharge characteristic information under fault condition, there are high sensitivity, anti-interference strong, simple operation and other advantages, in the exhausted of switchgear
It is widely used in edge state-detection.High-tension switch cabinet shelf depreciation can produce above earth potential on its metal shell,
Referred to as transient state voltage-to-ground, it is a kind of effective Partial Discharge Detection means.So detected by transient state voltage-to-ground method
High-tension switch cabinet shelf depreciation is commented by timely fault diagnosis with state it can be found that the insulation defect of its internal early stage
Valency, to take specific treatment measures, avoids its development.But the existing quality ginseng based on switchgear transient state voltage-to-ground tester
Difference is uneven, and switchgear inner structure is complicated in addition, and cannot directly observe the limitation of inside switch cabinet truth in operation；Therefore when
Have and there is a situation where that positioning accuracy does not reach engineer application basic demand.Its positioning accuracy refer to tester can accurately detect,
Judge the ability of specific discharge position in switchgear.It can be seen that the positioning accuracy of instrument for measuring partial discharge determines showing for detecting instrument
Application level and leakage alarm whether occurs in switch cabinet electrified detection process or alerts by mistake.
In consideration of it, it is necessary to develop, the inspection electricity using set of partial discharge transient earth voltage tester positioning accuracy
Road, product control examine whether the key technical index of partial discharge transient earth voltage tester reaches the requirement of technical specification.
The content of the invention
To solve the above-mentioned problems, the utility model provides a kind of detection dress of instrument for measuring partial discharge's device position error
Put, concrete technical scheme is as follows：
A kind of detection device of instrument for measuring partial discharge's device position error includes signal generator, build-out resistor, sensor
Load panel, reference sensor, tested sensor, tested instrument for measuring partial discharge；The signal generator and build-out resistor string
Connection connection；The signal generator includes at least two signal output channels；One signal output channels of the signal generator
It is connected with sensor loading panel；Another signal output channels of signal generator and the signal of tested instrument for measuring partial discharge
Transmission channel connects；Reference sensor, tested sensor are fixedly installed on sensor loading panel, and tested sensor is compared
The junction of signal generator and sensor loading panel is closer in reference sensor；Reference sensor, tested sensing
Device is connected with tested instrument for measuring partial discharge respectively.
Further, the signal generator is sinusoidal signal generator.
Further, the build-out resistor is the high frequency noninductive resistance that impedance is 50 ohm.
Further, the sensor loading panel is made by ferritic stainless steel, sensor loading panel a length of 500 ~ 600
Millimeter, width are 500 ~ 600 millimeters, a height of 2 ~ 5 millimeters.
Further, the reference sensor is shelf depreciation transient state low-voltage sensor, the low electricity of the shelf depreciation transient state
Pressure sensor meets the examination criteria of the units such as national high-voltage metering station, and meets technical specification：DLT1432.1《Power transformation is set
Standby on-Line Monitor Device inspection specification》、DLT 846.4《HV test equipment general technical specifications》In the 4th part it is local
7354 measurement of partial discharge of discharge measuring instrument and GB T.
The beneficial effects of the utility model are：
The utility model provides a kind of detection device of instrument for measuring partial discharge's device position error, is sensed by fixed
Device, comparative analysis are tested the sequencing that sensor is reached with reference sensor measured signal, and then realize with judging transient state electric
Pressure tester whether there is position error, early find instrument for measuring partial discharge may the performance present in engineer application ask
Topic, so as to achieve the purpose that the apparatus insulated abnormal states of high-voltage electrical apparatus such as timely detection, early warning high-tension switch cabinet.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Wherein：1- signal generators, 2- build-out resistors, 3- sensors loading panel, 4- reference sensors, 5- are tested sensing
Device, 6- are tested instrument for measuring partial discharge.
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：
As shown in Figure 1, a kind of detection device of instrument for measuring partial discharge's device position error includes signal generator 1, matching
Resistance 2, sensor loading panel 3, reference sensor 4, tested sensor 5, tested instrument for measuring partial discharge 6；Signal generator 1
It is connected in series with build-out resistor 2, signal generator 1 includes 4 signal output channels, is respectively signal transmission passage I, signal biography
Defeated passage II, signal transmission passage III, signal transmission passage IV, tested instrument for measuring partial discharge 6 lead to including 4 signal transmissions
Road, is respectively signal transmission passage I, signal transmission passage II, signal transmission passage III, the generation of signal transmission passage IV signals
The signal output channels I of device 1 loads panel 3 with sensor by the coaxial cable that impedance is 50 ohm and is connected；Signal generator 1
Signal output channels IV be connected by coaxial cable with the signal transmission passage IV of tested instrument for measuring partial discharge 6；With reference to biography
Sensor 4, tested sensor 5 are fixedly installed in 3 on sensor loading panel, and tested sensor 5 is compared to reference sensor 4 more
Adjunction is bordering on the junction of signal generator 1 and sensor loading panel 3；The output terminal of reference sensor 4, tested sensor 5
Output terminal by signal cable respectively the signal transmission passage I with tested instrument for measuring partial discharge 6, signal transmission passage II connect
Connect.
Wherein, signal generator 1 is sinusoidal signal generator, and for its output frequency up to 120 megahertzs, output voltage amplitude can
Up to 12 volts, output impedance is 50 ohm, and die-away time was not less than for 200 nanoseconds, and rising edge of a pulse is not more than 5 nanoseconds, output wave
Shape includes sine wave, square wave.Build-out resistor 2 is the high frequency noninductive resistance that impedance is 50 ohm.
Sensor loading panel 3 is made by ferritic stainless steel, sensor 3 a length of 600 millimeters of panel of loading, width 600
Millimeter, a height of 3 millimeters.
Reference sensor 4 is shelf depreciation transient state low-voltage sensor, and shelf depreciation transient state low-voltage sensor meets state
The examination criteria of the units such as family's high-voltage metering station, and meet technical specification：DLT1432.1《Transformer equipment on-Line Monitor Device
Inspection specification》、DLT 846.4《HV test equipment general technical specifications》In the 4th part measurement of partial discharge instrument and GB
7354 measurement of partial discharges of T.
During work, signal generator 1 simulates the signal of partial discharge transient earth voltage to the sensor loading transmission of panel 3,
The simulation partial discharge transient earth voltage that the transmission of panel 3 is loaded to sensor by 2 Regulate signal generator 1 of build-out resistor is believed
Number, it is ensured that it is consistent with the signal waveform transmitted from signal generator 1 to tested instrument for measuring partial discharge 6, and by tested local
Discharge tester 6 grasps signal amplitude, frequency, the waveform that signal generator 1 exports, and reference sensor 4 and tested sensor 5 can
Detected signal is transferred to tested instrument for measuring partial discharge 6 by signal cable, if tested sensor 5 is prior to reference
Sensor detects simulation partial discharge transient earth voltage signal and transmits the signal to tested instrument for measuring partial discharge 6, then
The positioning accuracy of tested shelf depreciation instrument 6 is met the requirements.
The laboratory ambient temperature of the utility model is 15 to 35 degrees Celsius, and relative humidity is 25 percent
To 75 percent, atmospheric pressure is 86 to 106 kPas.
The operation principle of the utility model is expanded on further below：
（1）The signal source tested using signal generator 1 as position error, the signal transmission of signal generator 1 is led to
Road IV is connected by coaxial cable with the signal transmission passage IV of tested instrument for measuring partial discharge 6, and by the letter of signal generator 1
Number transmission channel I loads the letter that panel 3 be connected simultaneously launching simulation partial discharge transient earth voltage by coaxial cable and sensor
Number, reference sensor 4, survey the surface that sensor 5 is fixedly installed in sensor loading panel 3 at the same time, and tested sensor 5 is compared
The junction of panel 3, the output terminal of reference sensor 4 are loaded closer to signal generator 1 and sensor in reference sensor 4
It is connected by signal cable with the signal transmission passage I of tested instrument for measuring partial discharge 6, the output terminal of tested sensor 5 passes through
Signal cable is connected with the signal transmission passage II of tested instrument for measuring partial discharge 6；And reference sensor 4, tested sensor 5 divide
The distance between junction of panel 3 and saying in tested instrument for measuring partial discharge 6 are not loaded with signal generator 1 and sensor
Accuracy rating specified in bright book or technical specifications；
（2）The signal frequency that signal generator 1 exports is arranged to 1 kHz, then comparative analysis reference sensor 4 and by
The sequencing that sensor 5 detects signal is surveyed, if tested sensor 5 is triggered prior to reference sensor 4, then it is assumed that tested local
The positioning accuracy of discharge tester 6 is met the requirements, otherwise to be unsatisfactory for requiring；
（3）In the lasting response and bid response material or product description of the tested instrument for measuring partial discharge 6 of record
Whether the position error stated is consistent, and then judges whether tested instrument for measuring partial discharge 6 is qualified.
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 (5)
- A kind of 1. detection device of instrument for measuring partial discharge's device position error, it is characterised in that：Including signal generator, matching electricity Resistance, sensor loading panel, reference sensor, tested sensor, tested instrument for measuring partial discharge；The signal generator with It is connected in series with resistance；The signal generator includes at least two signal output channels；One signal of the signal generator Output channel is connected with sensor loading panel；Another signal output channels of signal generator are tested with tested shelf depreciation The signal transmission passage connection of instrument；Reference sensor, tested sensor are fixedly installed on sensor loading panel, and tested biography Sensor is closer to the junction of signal generator and sensor loading panel compared to reference sensor；Reference sensor, Tested sensor is connected with tested instrument for measuring partial discharge respectively.
- A kind of 2. detection device of instrument for measuring partial discharge's device position error according to claim 1, it is characterised in that：Institute It is sinusoidal signal generator to state signal generator.
- A kind of 3. detection device of instrument for measuring partial discharge's device position error according to claim 1, it is characterised in that：Institute It is the high frequency noninductive resistance that impedance is 50 ohm to state build-out resistor.
- A kind of 4. detection device of instrument for measuring partial discharge's device position error according to claim 1, it is characterised in that：Institute State sensor loading panel to be made by ferritic stainless steel, sensor a length of 500 ~ 600 millimeters of panel of loading, width is 500 ~ 600 Millimeter, a height of 2 ~ 5 millimeters.
- A kind of 5. detection device of instrument for measuring partial discharge's device position error according to claim 1, it is characterised in that：Institute It is shelf depreciation transient state low-voltage sensor to state reference sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143551.9U CN207232372U (en) | 2017-09-07 | 2017-09-07 | A kind of detection device of instrument for measuring partial discharge's device position error |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721143551.9U CN207232372U (en) | 2017-09-07 | 2017-09-07 | A kind of detection device of instrument for measuring partial discharge's device position error |
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| Publication Number | Publication Date |
|---|---|
| CN207232372U true CN207232372U (en) | 2018-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721143551.9U Active CN207232372U (en) | 2017-09-07 | 2017-09-07 | A kind of detection device of instrument for measuring partial discharge's device position error |
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| CN (1) | CN207232372U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828420A (en) * | 2018-09-04 | 2018-11-16 | 国网青海省电力公司检修公司 | Radio frequency partial discharge detection method and device |
| CN110356432A (en) * | 2019-06-11 | 2019-10-22 | 北京全路通信信号研究设计院集团有限公司 | A kind of method and system can be used for track circuit failure inspection |
-
2017
- 2017-09-07 CN CN201721143551.9U patent/CN207232372U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828420A (en) * | 2018-09-04 | 2018-11-16 | 国网青海省电力公司检修公司 | Radio frequency partial discharge detection method and device |
| CN110356432A (en) * | 2019-06-11 | 2019-10-22 | 北京全路通信信号研究设计院集团有限公司 | A kind of method and system can be used for track circuit failure inspection |
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