CN109655721A - 10kV partial discharge of switchgear realtime on-line monitoring method and device - Google Patents
10kV partial discharge of switchgear realtime on-line monitoring method and device Download PDFInfo
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- CN109655721A CN109655721A CN201811625216.1A CN201811625216A CN109655721A CN 109655721 A CN109655721 A CN 109655721A CN 201811625216 A CN201811625216 A CN 201811625216A CN 109655721 A CN109655721 A CN 109655721A
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- electric signal
- switchgear
- amplifying circuit
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- ultrasonic wave
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
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- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to power Transmission security technology areas, disclose a kind of 10kV partial discharge of switchgear realtime on-line monitoring method and device, it, which is included in outside switchgear, installs broad band ultrasonic wave sensor, which can receive the ultrasonic wave that shelf depreciation generates in switchgear and be converted into electric signal；Second step amplifies electric signal by three-stage amplifier, it is made to obtain the gain of 40dB/60dB/80dB；Third step carries out data processing to electric signal by data processing module, forms the Wave data read for staff；4th step by wireless network will treated data are uploaded to monitor supervision platform, monitor supervision platform by data receiver by the data real-time display received on the screen, for staff's real-time monitoring.Effective solution of the present invention the problem of inspection type instrument for measuring partial discharge investigative range is limited in the prior art, and periodic interruption maintenance can not carry out on time.
Description
Technical field
The present invention relates to power Transmission security technology areas, are specifically to be related to a kind of 10kV partial discharge of switchgear reality
When on-line monitoring method.
Background technique
Switchgear is the important control equipment in power transmission system, is widely used in each substation, switching station, one
Denier failure will cause the power failure of locally even whole power grids, cause huge economic loss.Demand with society to electric power
It is increasing, guarantee that the safe operation of power equipment is particularly important.Since switchgear insulator arrangement in the production process can
Bubble or impurity are generated, there are the meetings such as high-pressure conductor spine, metallic particles group and Equip- ment manufacture and installation defect for inside switch cabinet
Cause electric field and dielectric uneven, under the electric field action of alternation, it is existing that electric discharge will occur for the higher place of electric field strength
As.Under normal circumstances, the energy very little of shelf depreciation, will not influence the insulation performance of switch cabinet equipment, but lasting part
Electric discharge will form a series of electric pulse, and very high temperature is generated on the medium of point of discharge, makes the dielectric properties of insulator arrangement
Deterioration, finally causes insulation breakdown and flashover, leads to more serious arc short circuit accident, cause immeasurable economic loss.
Existing inspection type partial discharge tester investigative range is limited, and periodic interruption maintenance again usually because of various reasons cannot be on time
It carries out, causes the failure in switchgear that cannot exclude in time, seriously threaten power supply safety, therefore develop a set of switchgear and locally put
Electric on-line monitoring system is highly desirable.
Summary of the invention
It is an object of the invention to provide a kind of 10kV partial discharge of switchgear realtime on-line monitoring methods, to solve
Problem of the existing technology.
The technical solution of 10kV partial discharge of switchgear realtime on-line monitoring method of the present invention is: a kind of 10kV switchgear office
Discharge realtime on-line monitoring method in portion, and broad band ultrasonic wave sensor, broadband ultrasonic wave sensing are installed first outside switchgear
Device can receive the ultrasonic wave that shelf depreciation generates in switchgear and be converted into electric signal；Second step is amplified by three-level
Circuit amplifies electric signal, it is made to obtain the gain of 40dB/60dB/80dB, thus by faint ultrasonic wave shelf depreciation
Feature is extracted from complicated background environment；Third step carries out data processing, shape to electric signal by data processing module
At the Wave data read for staff；By wireless network, by treated, data are uploaded to monitor supervision platform to 4th step,
Monitor supervision platform by data receiver by the data real-time display received on the screen, for staff's real-time monitoring.
The three-stage amplifier includes 80db amplifying circuit, 60db amplifying circuit and 40db amplifying circuit, and broadband is super
The electric signal that sonic sensor generates first amplifies electric signal using 80db amplifying circuit, if by 80db amplifying circuit
Electric signal measurement value afterwards is less than 28db, then carries out second level amplification using 60db amplifying circuit to the part electric signal, if through
Electric signal measurement value after 60db amplifying circuit is less than 42db, then carries out third using 40db amplifying circuit to the part electric signal
Grade amplification, if the electric signal measurement value after 60db amplifying circuit is not less than 28db, by the part, electric signal is transferred to 80db and puts
Big circuit amplifies processing again, if being not less than 42db by the amplified electric signal measurement value of 40db amplifying circuit three-level,
Then by the part, electric signal is transferred in 60db amplifying circuit enhanced processing again.
The data processing module is FPGA+DSP processing module.
The wireless network is ZigBee wireless self-networking.
The present invention goes back while providing a kind of 10kV partial discharge of switchgear real time on-line monitoring device, the 10kV switchgear
The technical solution of shelf depreciation real time on-line monitoring device is:
A kind of 10kV partial discharge of switchgear real time on-line monitoring device, including
Broad band ultrasonic wave sensor, for picking up to the ultrasonic wave of shelf depreciation generation in switchgear and being converted into electricity
Signal；
Three-stage amplifier makes it generate the gain of 40dB/60dB/80dB for amplifying to electric signal；
Data processing module, for carrying out data processing to amplified electric signal, what formation was read for staff
Wave data；
Wireless sending module, for Wave data to be uploaded to monitor supervision platform by treated；And
Wave data is displayed on the screen by monitor supervision platform by data receiver, is analyzed and determined for staff.
The present invention using broad band ultrasonic wave sensor pick up ultrasonic wave that the apparatus local discharges such as switchgear generate and by its
Be converted to electric signal, by electric signal by amplification analysis processing after available apparatus local discharge information various characteristic quantities,
By analyzing these characteristic quantities, so that it may effectively carry out real-time monitoring to the insulation defect situation of medium in switchgear and sentence
Disconnected, so as to effective solution, inspection type instrument for measuring partial discharge investigative range is limited in the prior art, periodically has a power failure
The problem of maintenance can not carry out on time, ensure that the normal operation of switchgear.
Detailed description of the invention
Fig. 1 is the schematic diagram of 10kV partial discharge of switchgear realtime on-line monitoring method of the present invention.
Fig. 2 is the logical flow chart of three-stage amplifier in Fig. 1.
Specific embodiment
Below in conjunction with attached drawing of the invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
As shown in Figure 1,10kV partial discharge of switchgear realtime on-line monitoring method of the invention, first outside switchgear
Broad band ultrasonic wave sensor is installed, which can receive the ultrasonic wave that shelf depreciation generates in switchgear
And it is converted into electric signal；Second step amplifies electric signal by three-stage amplifier, it is made to obtain 40dB/60dB/
The gain of 80dB, so that faint ultrasonic wave local discharge characteristic be extracted from complicated background environment；Third step is logical
It crosses data processing module and data processing is carried out to electric signal, form the Wave data read for staff；4th step passes through
By treated, data are uploaded to data receiver to wireless network；The data that will be received finally by data receiver display module
Real-time display on the screen, for staff's real-time monitoring.
Scheme is advanced optimized as shown in Fig. 2, three-stage amplifier therein includes 80db amplifying circuit, 60db amplification electricity
Road and 40db amplifying circuit, the electric signal that broad band ultrasonic wave sensor generates use 80db amplifying circuit to carry out electric signal first
Amplification is amplified the part electric signal using 60db if the electric signal measurement value after 80db amplifying circuit is less than 28db
Circuit carries out second level amplification, if the electric signal measurement value after 60db amplifying circuit is less than 42db, to the part electric signal
Third level amplification is carried out using 40db amplifying circuit, if the electric signal measurement value after 60db amplifying circuit is not less than 28db,
By the part, electric signal is transferred to 80db amplifying circuit and amplifies processing again, if amplified by 40db amplifying circuit three-level
Electric signal measurement value is not less than 42db, then by the part, electric signal is transferred in 60db amplifying circuit enhanced processing again.
Further prioritization scheme is that above-mentioned data processing module uses FPGA+DSP processing module；Above-mentioned is wireless
Network uses ZigBee wireless self-networking.
The working principle of the invention is: when inside switch cabinet generates partial discharge phenomenon, intermolecular play in region of discharge
Electric discharge fever will lead to stereomutation in strong shock and medium, can all generate frequency and be greater than 20KHZ pulse ultrasonic wave, thus
Partial Discharge Sources can be regarded to a pulse sound source as, it then follows the propagation law of mechanical wave, sound wave are passed around in the form of spherical wave
It broadcasts, spread speed is different in different media, and different medium intersection can generate reflection and refraction effect.In equipment such as switchgears
Ultrasonic signal, can be converted to electric signal by outside installation broad band ultrasonic wave sensor, and then data processing is handled, and is characterized
The various characteristic quantities of apparatus local discharge information, by analyzing these characteristic quantities, so that it may effectively to the insulation defect of medium
Situation is judged.
The present invention additionally provides a kind of 10kV partial discharge of switchgear real time on-line monitoring device simultaneously, as shown in Figure 1, its
Including broad band ultrasonic wave sensor, for picking up to the ultrasonic wave of shelf depreciation generation in switchgear and being converted into telecommunications
Number；Three-stage amplifier makes it generate the gain of 40dB/60dB/80dB for amplifying to electric signal；Data processing mould
Block forms the Wave data read for staff for carrying out data processing to amplified electric signal；Transmit wirelessly mould
Block, for Wave data to be uploaded to monitor supervision platform by treated；And monitor supervision platform, pass through data receiver for waveform number
According to being displayed on the screen, analyzed and determined for staff.
It should be noted that although an embodiment of the present invention has been shown and described, for the ordinary skill of this field
For personnel, it is possible to understand that a variety of changes can be carried out to these embodiments without departing from the principles and spirit of the present invention
Change, modification, replacement and variant, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of 10kV partial discharge of switchgear realtime on-line monitoring method, which is characterized in that it is installed outside switchgear first
Broad band ultrasonic wave sensor, the broad band ultrasonic wave sensor can pick up the ultrasonic wave that shelf depreciation generates in switchgear and will
It is converted to electric signal；Second step amplifies electric signal by three-stage amplifier, it is made to obtain 40dB/60dB/80dB
Gain, so that faint ultrasonic wave local discharge characteristic be extracted from complicated background environment；Third step passes through number
Data processing is carried out to electric signal according to processing module, forms the Wave data read for staff；4th step passes through wireless
By treated, data are uploaded to monitor supervision platform to network, and monitor supervision platform passes through the data real-time display that data receiver will receive
On the screen, for staff's real-time monitoring.
2. 10kV partial discharge of switchgear realtime on-line monitoring method according to claim 1, which is characterized in that described
Three-stage amplifier includes 80db amplifying circuit, 60db amplifying circuit and 40db amplifying circuit, and broad band ultrasonic wave sensor generates
Electric signal electric signal is amplified using 80db amplifying circuit first, if the electric signal measurement after 80db amplifying circuit
Value is less than 28db, then second level amplification is carried out using 60db amplifying circuit to the part electric signal, if after 60db amplifying circuit
Electric signal measurement value be less than 42db, then to the part electric signal using 40db amplifying circuit carry out third level amplification, if through
Electric signal measurement value after 60db amplifying circuit is not less than 28db, then by the part electric signal be transferred to 80db amplifying circuit again into
Row enhanced processing, if being not less than 42db by the amplified electric signal measurement value of 40db amplifying circuit three-level, by part electricity
Signal is transferred in 60db amplifying circuit enhanced processing again.
3. 10kV partial discharge of switchgear realtime on-line monitoring method according to claim 1, which is characterized in that the number
It is FPGA+DSP processing module according to processing module.
4. 10kV partial discharge of switchgear realtime on-line monitoring method according to claim 1, which is characterized in that the nothing
Gauze network is ZigBee wireless self-networking.
5. a kind of 10kV partial discharge of switchgear real time on-line monitoring device, which is characterized in that including
Broad band ultrasonic wave sensor, for picking up to the ultrasonic wave of shelf depreciation generation in switchgear and being converted into telecommunications
Number；
Three-stage amplifier makes it generate the gain of 40dB/60dB/80dB for amplifying to electric signal；
Data processing module forms the waveform read for staff for carrying out data processing to amplified electric signal
Data；
Wireless sending module, for Wave data to be uploaded to monitor supervision platform by treated；And
Wave data is displayed on the screen by monitor supervision platform by data receiver, is analyzed and determined for staff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625216.1A CN109655721A (en) | 2018-12-28 | 2018-12-28 | 10kV partial discharge of switchgear realtime on-line monitoring method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625216.1A CN109655721A (en) | 2018-12-28 | 2018-12-28 | 10kV partial discharge of switchgear realtime on-line monitoring method and device |
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| Publication Number | Publication Date |
|---|---|
| CN109655721A true CN109655721A (en) | 2019-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811625216.1A Pending CN109655721A (en) | 2018-12-28 | 2018-12-28 | 10kV partial discharge of switchgear realtime on-line monitoring method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542842A (en) * | 2019-09-29 | 2019-12-06 | 广东电网有限责任公司 | 10kV switch cabinet partial discharge simulation device and method |
-
2018
- 2018-12-28 CN CN201811625216.1A patent/CN109655721A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542842A (en) * | 2019-09-29 | 2019-12-06 | 广东电网有限责任公司 | 10kV switch cabinet partial discharge simulation device and method |
| CN110542842B (en) * | 2019-09-29 | 2024-04-12 | 广东电网有限责任公司 | 10kV switch cabinet partial discharge simulation device and method |
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| PB01 | Publication | ||
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Application publication date: 20190419 |