CN205450181U - A portable equipment for high tension switchgear's local discharge on -line monitoring - Google Patents
A portable equipment for high tension switchgear's local discharge on -line monitoring Download PDFInfo
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- CN205450181U CN205450181U CN201521103809.3U CN201521103809U CN205450181U CN 205450181 U CN205450181 U CN 205450181U CN 201521103809 U CN201521103809 U CN 201521103809U CN 205450181 U CN205450181 U CN 205450181U
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- Prior art keywords
- switch cabinet
- tension switch
- partial discharge
- discharge monitoring
- portable unit
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Abstract
The utility model provides a portable equipment for high tension switchgear's local discharge on -line monitoring, this device mainly comprises gap electromagnetic wave measuring unit, filtering and amplifying circuit and data acquisition and processing module. Wherein, the measuring unit of high frequency electric magnetic wave adopts the loop configuration of officious announcement electric current, and its output signal transmits data acquisition and processing module to after filtering and amplifier circuit processing, accomplish the aassessment of high tension switchgear state of insulation. The utility model discloses bipolarity magnetic field on the measuring symmetric position that to be high tension switchgear radiated out from the gap has the ability of very high sensitivity and antinoise, and is lower to signal modules's sampling frequency requirement, and simple structure, cost are lower, has extensive application prospect in the high tension switchgear partial discharge monitoring field.
Description
[technical field]
This utility model relates to a kind of high-tension switch cabinet Condition Monitoring Technology, particularly to the portable unit of a kind of partial discharge monitoring for high-tension switch cabinet.
[background technology]
High-tension switch cabinet and ring main unit are equipment important in power distribution network, are the most widely applied.Its safety work direct relation the q&r of power supply.According to statistics, in 6-10kV switch cubicle accident, have more than 50% and cause due to failure of insulation.Therefore, state of insulation to high-tension switch cabinet is monitored significant efficiently and accurately.
At present, domestic and international power department mostly uses transient state voltage-to-ground (TEV) method and supercritical ultrasonics technology that high-voltage board and ring main unit are carried out insulation state monitoring.Hand-held switch cubicle electric wave Partial discharge detector ultrasonically, integrates transient earth voltage and two kinds of detection method for local discharge of ultrasound wave, effectively switch cubicle can be carried out insulation state monitoring in actual applications.
But there is also weak point: 1) capacity of resisting disturbance is more weak, when environmental background noise is bigger, situation erroneous judgement easily occurs, failing to judge；2) affected bigger by measuring position.When position one timing of discharge source, the difference measuring signal of diverse location is further determined that partial discharge intensity adds difficulty.3) requirement to signal processing module is higher, when sample frequency do not reach require time, the precision of result can be directly affected.
Therefore, a kind of capacity of resisting disturbance is developed strong, it is possible to the measurement apparatus of the state of insulation of efficient, accurate measurements high-tension switch cabinet and ring main unit has great importance.
[summary of the invention]
This utility model provides the portable unit of a kind of partial discharge monitoring for high-tension switch cabinet, can be with on-line monitoring and diagnose the shelf depreciation caused in high-tension switch cabinet due to insulation defect.Apparatus structure is simple, and low cost, capacity of resisting disturbance research, design and application strong, at intelligent switchboard all have application prospect.
This utility model provides the portable unit of a kind of partial discharge monitoring for high-tension switch cabinet, including measuring unit, filter amplification circuit and data acquisition and processing module, described measuring unit is a pair, lay respectively at the symmetric position in high-tension switch cabinet gap, assess discharge signal by catching the gap radiation signal out magnetic field in symmetric position, thus switch cubicle state of insulation is estimated.
Described measuring unit uses the loop configuration of Nonuniform Currents.
Described measuring unit is mainly made up of Circular Winding, BNC coaxial connector and impedance matching box, and described measuring unit is connected with filter amplification circuit by BNC coaxial connector.
The axis of described Circular Winding be arranged in parallel with gap.
Described Circular Winding is coiled into loop configuration by enamel-covered wire, and is powered it by parallel wire.
A diameter of 2mm of described Circular Winding enamel-covered wire, the gap of parallel wire is not more than 1mm, and length is not more than 5mm.
Described BNC coaxial connector uses the BNC-50KF of flanged structure, and the build-out resistor of described impedance matching box is 50 Ω.
Described filter amplification circuit is by being mainly made up of amplification module, band filter and shielding shell, and the outfan of described amplification module connects the input of band filter, and the two is arranged in shielding shell.
Described filter amplification circuit is mainly made up of capacitance resistance and high speed operation amplifier, and amplification is not less than 10 times, and band filter passband low-frequency cut-off frequency is not less than 30MHz, not higher than 100MHz, and high-frequency cut-off frequency is not less than 2GHz, not higher than 5GHz.
Described data acquisition and processing (DAP) module is mainly made up of data collecting card and processing module.
Compared with prior art, what this utility model at least had the advantages that this utility model measures is the electromagnetic field radiated in switch cubicle gap, contrary from the gap radiation polarity of the magnetic field on symmetric position of signal out, readily identified judgement, this utility model is made to have the strongest capacity of resisting disturbance, it is achieved that switch cubicle state of insulation is assessed efficiently and accurately.It addition, measurement of the present utility model does not has and switch cubicle mesohigh part contact, it is ensured that the safety of operator.
[accompanying drawing explanation]
The above is only this utility model plan explanation, in order to become apparent from that technological means of the present utility model is described, elaborates this utility model with detailed description of the invention below in conjunction with accompanying drawing.
Fig. 1 is the system pie graph of the portable unit of a kind of partial discharge monitoring for high-tension switch cabinet of this utility model.
Fig. 2 is the portable unit slot electromagnetic wave measurement cellular construction schematic diagram of a kind of partial discharge monitoring for high-tension switch cabinet of this utility model.
Fig. 3 is portable unit filter amplification circuit and the structural representation of data processing module of a kind of partial discharge monitoring for high-tension switch cabinet of utility model.
Fig. 4 is this utility model mounting structure schematic diagram in high-tension switch cabinet.
[detailed description of the invention]
As it is shown in figure 1, this utility model provides the portable unit of a kind of partial discharge monitoring for high-tension switch cabinet, this device is mainly made up of the measuring unit 11 of slot electromagnetic ripple, filter amplification circuit 12 and data acquisition and processing (DAP) module 13.Wherein, described measuring unit 11 uses the loop configuration of Nonuniform Currents, and its output signal amplifying circuit 12 after filtering is transferred to data acquisition and processing (DAP) module 13 after processing, and completes the assessment of high-tension switch cabinet state of insulation.The dipole magnetic field that what this utility model was measured is high-tension switch cabinet from gap radiation symmetric position out, there is the highest sensitivity and antimierophonic ability, the sample frequency of signaling module is required relatively low, and simple in construction, cost are relatively low, are with a wide range of applications in high-tension switch cabinet partial discharge monitoring field.
As in figure 2 it is shown, the measuring unit 11 of described slot electromagnetic ripple is mainly made up of Circular Winding 21, parallel wire 22, BNC coaxial connector 23 and impedance matching box 24.
A diameter of 75mm loop configuration that described Circular Winding 21 is coiled into by enamel-covered wire, and by parallel wire 22, it is powered.BNC coaxial connector 23 uses the BNC-50KF of flanged structure.The build-out resistor of impedance matching box 24 is 50 Ω.
A diameter of 2mm of described Circular Winding 21 enamel-covered wire, the feeding gap of parallel wire 22 is not more than 1mm, and length is not more than 5mm.
As it is shown on figure 3, described filter amplification circuit 12 is by being mainly made up of amplification module 31, band filter 32 and shielding shell 33, the outfan of described amplification module 31 connects the input of band filter 32, and the two is arranged in shielding shell 33.
Described band filter 32 is mainly made up of electric capacity and resistance, and the amplification of described amplification module 31 is not less than 10 times.The passband low-frequency cut-off frequency of described band filter is not less than 30MHz, not higher than 100MHz, and high-frequency cut-off frequency is not less than 2GHz, not higher than 5GHz.
Described data acquisition and processing (DAP) module 13 is mainly made up of data collecting card 34 and processing module 35.
Being an embodiment of the present utility model as shown in Figure 4, two slot electromagnetic wave measurement unit 11 are placed in the symmetric position in high-tension switch cabinet gap, and the axis of Circular Winding is parallel with gap.The signal recorded amplifying circuit after filtering is sent to data acquisition and processing (DAP) module, completes the analysis and evaluation of discharge signal.Contrary from the gap radiation polarity of the magnetic field on symmetric position of signal out, it is easy to identify and judge so that this utility model has the strongest capacity of resisting disturbance, it is achieved that assess switch cubicle state of insulation efficiently and accurately.
After using above design, this utility model at least has the advantage that
1, this utility model is a kind of Portable type measurement unit, and sensor measurement is the electromagnetic field radiated in switch cubicle gap, does not has and switch cubicle mesohigh part contact, it is ensured that the safety of operator.
2, this utility model volume is little, simple in construction, it is simple to tests at the scene and measures.
3, less demanding to data processing module of this utility model, also has higher sensitivity in the case of low sampling rate, and capacity of resisting disturbance is strong.The above; it it is only presently preferred embodiments of the present invention; the present invention not makees any pro forma restriction, and those skilled in the art utilize the technology contents of the disclosure above to make a little simple modification, equivalent variations or modification, all fall within protection scope of the present invention.
Claims (10)
1. the portable unit for the partial discharge monitoring of high-tension switch cabinet, it is characterized in that: include measuring unit (11), filter amplification circuit (12) and data acquisition and processing module (13), described measuring unit is a pair, lay respectively at the symmetric position in high-tension switch cabinet gap, assess discharge signal by catching the gap radiation signal out magnetic field in symmetric position, thus switch cubicle state of insulation is estimated.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 1, it is characterised in that: described measuring unit (11) uses the loop configuration of Nonuniform Currents.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 1, it is characterized in that: described measuring unit (11) is mainly made up of Circular Winding (21), parallel wire (22), BNC coaxial connector (23) and impedance matching box (24), described measuring unit (11) is connected with filter amplification circuit by BNC coaxial connector.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 3, it is characterised in that: the axis of described Circular Winding (21) be arranged in parallel with gap.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 3, it is characterized in that: described Circular Winding (21) is coiled into loop configuration by enamel-covered wire, and is powered it by parallel wire (22).
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 5, it is characterized in that: a diameter of 2mm of described Circular Winding (21) enamel-covered wire, the gap of parallel wire (22) is not more than 1mm, and length is not more than 5mm.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 3, it is characterized in that: described BNC coaxial connector (23) uses the BNC-50KF of flanged structure, the build-out resistor of described impedance matching box (24) to be 50 Ω.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 1, it is characterized in that: described filter amplification circuit (12) is by being mainly made up of amplification module (31), band filter (32) and shielding shell (33), the outfan of described amplification module (31) connects the input of band filter (32), and the two is arranged in shielding shell (33).
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 8, it is characterized in that: described band filter (32) is mainly made up of electric capacity and resistance, band filter passband low-frequency cut-off frequency is not less than 30MHz, not higher than 100MHz, high-frequency cut-off frequency is not less than 2GHz, not higher than 5GHz；The amplification of described amplification module (31) is not less than 10 times.
The portable unit of a kind of partial discharge monitoring for high-tension switch cabinet the most according to claim 1, it is characterised in that: described data acquisition and processing (DAP) module (13) is mainly made up of data collecting card (34) and processing module (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521103809.3U CN205450181U (en) | 2015-12-25 | 2015-12-25 | A portable equipment for high tension switchgear's local discharge on -line monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521103809.3U CN205450181U (en) | 2015-12-25 | 2015-12-25 | A portable equipment for high tension switchgear's local discharge on -line monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205450181U true CN205450181U (en) | 2016-08-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521103809.3U Expired - Fee Related CN205450181U (en) | 2015-12-25 | 2015-12-25 | A portable equipment for high tension switchgear's local discharge on -line monitoring |
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| Country | Link |
|---|---|
| CN (1) | CN205450181U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425129A (en) * | 2015-12-25 | 2016-03-23 | 国网陕西省电力公司西安供电公司 | Portable device used for partial discharge online monitoring of high-voltage switch cabinet |
| CN107607843A (en) * | 2017-09-19 | 2018-01-19 | 陈冲 | A kind of cable insulating defect point detects circuit |
| CN110554285A (en) * | 2019-09-02 | 2019-12-10 | 中铁工程设计咨询集团有限公司 | self-adaptive environmental noise suppression partial discharge monitoring method |
-
2015
- 2015-12-25 CN CN201521103809.3U patent/CN205450181U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425129A (en) * | 2015-12-25 | 2016-03-23 | 国网陕西省电力公司西安供电公司 | Portable device used for partial discharge online monitoring of high-voltage switch cabinet |
| CN105425129B (en) * | 2015-12-25 | 2018-11-09 | 国网陕西省电力公司西安供电公司 | A kind of portable unit of partial discharge monitoring for high-tension switch cabinet |
| CN107607843A (en) * | 2017-09-19 | 2018-01-19 | 陈冲 | A kind of cable insulating defect point detects circuit |
| CN110554285A (en) * | 2019-09-02 | 2019-12-10 | 中铁工程设计咨询集团有限公司 | self-adaptive environmental noise suppression partial discharge monitoring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20201225 |