CN108051713A - There is the partial discharge location device for shielding low frequency and high noisy - Google Patents
There is the partial discharge location device for shielding low frequency and high noisy Download PDFInfo
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- CN108051713A CN108051713A CN201711352390.9A CN201711352390A CN108051713A CN 108051713 A CN108051713 A CN 108051713A CN 201711352390 A CN201711352390 A CN 201711352390A CN 108051713 A CN108051713 A CN 108051713A
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- pass filtering
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- filtering circuit
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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)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention discloses the partial discharge location devices for having the function of to shield low frequency and high noisy, including housing, BNC connector, three switching switches, duplex single control switch, high-pass filtering circuit, low-pass filter circuit, amplifying circuit, the high-pass filtering circuit includes the first high-pass filtering circuit, the second high-pass filtering circuit, the 3rd high-pass filtering circuit, and the low-pass filter circuit includes the first low-pass filter circuit, the second low-pass filter circuit.It is needed to select suitable lower frequency limit by three change-over switches according to scene, suitable upper limiting frequency is selected by duplex single control switch, the interference of low frequency and high frequency noise is shielded by the upper limiting frequency and lower frequency limit of selection, avoids additionally installing coaxial cable formula wave filter increase cost additional.
Description
Technical field
The present invention relates to partial discharge location instrument, and in particular to has the function of the partial discharge location device for shielding low frequency and high noisy.
Background technology
Gas-insulating and fully-enclosed combined electrical apparatus (GIS) once it is charged put into operation after, although the spy that faulty few reliability is high
Point, but the problem of be difficult to detect there is also incipient fault, several new offices such as UHF hyperfrequencies, ultrasonic wave, HFCT high frequency electrics
The technological means that monitoring technology is put as the insulation status of GIS in effective detection operation receives greatly to promote in recent years.It is high as providing
One effective means of voltage electrical equipment partial discharge detection reliability and an effective hand for excluding live complex electromagnetic environment interference
Section, partial discharge source location technology are particularly significant.
In the prior art, there is common partial discharge location equipment currently on the market, to be all based on hyperfrequency ultrasonic combined fixed
The means of position, the general frequency range that detects is all between 0.3G -1.5GHZ, it is impossible to exclude low frequency or high frequency by selecting frequency range
The interference of noise needs additional installation coaxial cable formula wave filter, cumbersome.
The content of the invention
The present invention solves partial discharge location equipment common currently on the market existing in the prior art and is all based on hyperfrequency
The means of ultrasonic combined positioning, the general frequency range that detects is all between 0.3G -1.5GHZ, it is impossible to be excluded by selecting frequency range
Low frequency either the interference of high frequency noise or need it is additional install coaxial cable formula wave filter additional, it is cumbersome the problem of, tool is provided
There are shielding low frequency and the partial discharge location device of high noisy function, can be selected when applying between different high passes, low-pass filtering,
It is optional to reach lower frequency limit, upper line frequency is optional, and the interference of shielding low frequency and high frequency noise is selected according to actual demand.
The present invention is achieved through the following technical solutions：
There is the partial discharge location device for shielding low frequency and high noisy, including housing, BNC connector, three switching switches,
Duplex single control switch, high-pass filtering circuit, low-pass filter circuit, amplifying circuit, the high-pass filtering circuit include the first high pass
Filter circuit, the second high-pass filtering circuit, the 3rd high-pass filtering circuit, the low-pass filter circuit include the first low-pass filtering electricity
Road, the second low-pass filter circuit, the BNC connector are set on the surface of the housing, and the output terminal of the BNC connector is cut with three
Change the input terminal connection of switch, three output terminals of three change-over switch respectively with the first high-pass filtering circuit, second high
The input terminal of bandpass filter circuit and the 3rd high-pass filtering circuit connects, and three change-over switches are set on the surface of the housing,
The high-pass filtering circuit, low-pass filter circuit and amplifying circuit are arranged on the inside of housing, first high-pass filtering circuit,
The output terminal of second high-pass filtering circuit and the 3rd high-pass filtering circuit is connected with the input terminal of duplex single control switch, duplex single control
Input terminal of the output terminal of switch respectively with the first low-pass filter circuit, the second low-pass filter circuit is connected, first low pass
The input terminal connection of the output terminal and amplifying circuit of filter circuit and the second low-pass filter circuit, the output terminal of the amplifying circuit
It sets on the surface of the housing.The present invention sets high-pass filtering circuit, low-pass filter circuit, amplifying circuit inside housings,
It is protected by housing.BNC connector, three change-over switches and duplex single control switch are fixed by housing, convenient for existing
Field is connected by BNC connector, passes through three change-over switches and duplex single control switch carries out frequency range adjusting.Pass through three change-over switches
High-pass filtering passage is selected between the first high-pass filtering circuit, the second high-pass filtering circuit and the 3rd high-pass filtering circuit, just
In related personnel lower frequency limit is selected according to actual conditions.It is determined by the first low-pass filter circuit, the second low-pass filter circuit
Upper limiting frequency.Then multiple amplification is fixed by amplifying circuit to be connected to high-speed oscilloscope and shown.According to live need
Suitable lower frequency limit is selected by three change-over switches, suitable upper limiting frequency is selected by duplex single control switch, is passed through
Upper limiting frequency and lower frequency limit the shielding low frequency of selection and the interference of high frequency noise, avoid additionally installing coaxial cable formula wave filter additional
Increase cost.
Further, there is the partial discharge location device for shielding low frequency and high noisy, first high-pass filtering circuit
Lower frequency limit be 0.8GHZ.More than the UHF signals collected are limited in by the first high-pass filtering circuit, 0.8GHZ is shielded
The interference of following low frequency or high frequency noise.
Further, there is the partial discharge location device for shielding low frequency and high noisy, second high-pass filtering circuit
Lower frequency limit be 0.5GHZ.The UHF signals collected are limited in by more than 0.5GHZ by the second high-pass filtering circuit, are shielded
The interference of the low frequency or high frequency noise of below 0.5GHZ.
Further, there is the partial discharge location device for shielding low frequency and high noisy, the 3rd high-pass filtering circuit
Lower frequency limit be 0.3GHZ.The UHF signals collected are limited in by more than 0.3GHZ by the 3rd high-pass filtering circuit, are shielded
The interference of the low frequency or high frequency noise of below 0.3GHZ.
Further, there is the partial discharge location device for shielding low frequency and high noisy, first low-pass filter circuit
Cutoff frequency be 1.5GHZ.UHF signals are limited in below 1.5GHZ, avoid UHF signals are excessive from causing high frequency noise.
Further, there is the partial discharge location device for shielding low frequency and high noisy, second low-pass filter circuit
Cutoff frequency be 1.0GHZ.UHF signals are limited in below 1.0GHZ, avoid UHF signals are excessive from causing high frequency noise.
Further, there is the partial discharge location device for shielding low frequency and high noisy, the amplifying circuit fixes amplification
40DB.Fixed amplification 40DB be adapted for use in, the situation of low signal areas or signal line length uses.
Compared with prior art, the present invention it has the following advantages and advantages：
1st, the present invention has the function of the partial discharge location device for shielding low frequency and high noisy, is needed according to scene by three turns
It changes switch and selects suitable lower frequency limit, suitable upper limiting frequency is selected by duplex single control switch, pass through the upper limit frequency of selection
The interference of rate and lower frequency limit shielding low frequency and high frequency noise avoids additionally installing coaxial cable formula wave filter increase cost additional.
2nd, the present invention has the function of the partial discharge location device for shielding low frequency and high noisy, high-pass filtering circuit, low-pass filtering
Circuit, amplifying circuit are set inside housings, are protected by housing.
3rd, the present invention has the function of the partial discharge location device for shielding low frequency and high noisy, and fixed amplification 40DB is adapted for use with
In, low signal areas or signal line length situation use.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is block schematic illustration of the present invention.
Specific embodiment
Understand to make the object, technical solutions and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment
As shown in Figure 1, there is the partial discharge location device for shielding low frequency and high noisy, including housing, BNC connector, three
Join switching switch, duplex single control switch, high-pass filtering circuit, low-pass filter circuit, amplifying circuit, the high-pass filtering circuit bag
The first high-pass filtering circuit, the second high-pass filtering circuit, the 3rd high-pass filtering circuit are included, under first high-pass filtering circuit
Limit frequency is 0.8GHZ, and the lower frequency limit of second high-pass filtering circuit is 0.5GHZ, the 3rd high-pass filtering circuit
Lower frequency limit is 0.3GHZ, and the low-pass filter circuit includes the first low-pass filter circuit, the second low-pass filter circuit, described the
The cutoff frequency of one low-pass filter circuit is 1.5GHZ, and the cutoff frequency of second low-pass filter circuit is 1.0GHZ, described
BNC connector is set on the surface of the housing, and the output terminal of the BNC connector is connected with the input terminal of three switching switches, described
Three output terminals of three change-over switches respectively with the first high-pass filtering circuit, the second high-pass filtering circuit and the 3rd high-pass filtering
The input terminal connection of circuit, three change-over switch are set on the surface of the housing, the high-pass filtering circuit, low-pass filtering
Circuit and amplifying circuit are arranged on the inside of housing, and first high-pass filtering circuit, the second high-pass filtering circuit and the 3rd are high
The output terminal of bandpass filter circuit is connected with the input terminal of duplex single control switch, and the output terminal of duplex single control switch is low with first respectively
The input terminal connection of bandpass filter circuit, the second low-pass filter circuit, first low-pass filter circuit and the second low-pass filtering electricity
The output terminal on road and the input terminal of amplifying circuit connect, and the amplifying circuit fixes amplification 40DB, the output of the amplifying circuit
End is set on the surface of the housing.
Present invention detection frequency range is all between 0.3G -1.5GHZ, under normal circumstances, the interference signal that power equipment generates
Concentrate on 300Mhz and its following frequency range；The interference signal that communication generates all concentrates on 900Mhz or so；The noise that radar generates
Signal is since the wavelength and frequency of the radar of different purposes are different, and wavelength, spectrum distribution are wider, if only detecting 0.3-
Signal between 1.5Ghz, it is very big to be mixed into the possibility of interference signal, if equipment can accomplish in some Frequency Band Selection, so that it may
To avoid the interference signal of some specific frequencies, antijamming capability is improved.Also there is the filter for making coaxial interface formula currently on the market
Ripple device accesses BNC mouths or N-type interface between signal wire and equipment when needed, cumbersome.By high-pass filtering electricity
Road, low-pass filter circuit, amplifying circuit are set inside housings, are protected by housing.By housing to BNC connector, three
Connection change-over switch and duplex single control switch are fixed, and are connected convenient for scene by BNC connector, by three change-over switches and double
Join single control switch and carry out frequency range adjusting.First high-pass filtering circuit, the second high-pass filtering circuit and the 3rd high-pass filtering circuit are adopted
With high-pass filter, filtered by three change-over switches in the first high-pass filtering circuit, the second high-pass filtering circuit and the 3rd high pass
High-pass filtering passage is selected between wave circuit, is selected convenient for related personnel according to actual conditions in 0.8GHZ/0.5GHZ/0.3GHZ
Lower frequency limit.First low-pass filter circuit, the second low-pass filter circuit pass through the first low-pass filtering electricity using low-pass filter
Road, the second low-pass filter circuit determine upper limiting frequency, convenient for related personnel according to actual conditions in 1.5GHZ/1.0GHZ selections
Limit frequency.Then high-speed oscilloscope is connected to by 40 times of fixed multiples amplifications of amplifying circuit progress to be shown.According to scene
It needs to select suitable lower frequency limit by three change-over switches, suitable upper limiting frequency is selected by duplex single control switch, is led to
The upper limiting frequency of selection and the interference of lower frequency limit shielding low frequency and high frequency noise are crossed, avoids additionally installing the filtering of coaxial cable formula additional
Device increases cost.
Above-described specific embodiment has carried out the purpose of the present invention, technical solution and advantageous effect further
It is described in detail, it should be understood that the foregoing is merely the specific embodiments of the present invention, is not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (7)
1. there is the partial discharge location device for shielding low frequency and high noisy, which is characterized in that including housing, BNC connector, three
Switching switch, duplex single control switch, high-pass filtering circuit, low-pass filter circuit, amplifying circuit, the high-pass filtering circuit include
First high-pass filtering circuit, the second high-pass filtering circuit, the 3rd high-pass filtering circuit, it is low that the low-pass filter circuit includes first
Bandpass filter circuit, the second low-pass filter circuit, the BNC connector are set on the surface of the housing, the output terminal of the BNC connector
It is connected with the input terminal of three switching switches, three output terminals of three change-over switch are electric with the first high-pass filtering respectively
The input terminal connection on road, the second high-pass filtering circuit and the 3rd high-pass filtering circuit, three change-over switch are arranged on housing
Surface on, the high-pass filtering circuit, low-pass filter circuit and amplifying circuit are arranged on the inside of housing, first high pass
The output terminal of filter circuit, the second high-pass filtering circuit and the 3rd high-pass filtering circuit connects with the input terminal of duplex single control switch
It connects, the input terminal of the output terminal of duplex single control switch respectively with the first low-pass filter circuit, the second low-pass filter circuit is connected, institute
The input terminal of the output terminal and amplifying circuit of stating the first low-pass filter circuit and the second low-pass filter circuit connects, the amplification electricity
The output terminal on road is set on the surface of the housing.
2. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
The lower frequency limit for stating the first high-pass filtering circuit is 0.8GHZ.
3. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
The lower frequency limit for stating the second high-pass filtering circuit is 0.5GHZ.
4. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
The lower frequency limit for stating the 3rd high-pass filtering circuit is 0.3GHZ.
5. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
The cutoff frequency for stating the first low-pass filter circuit is 1.5GHZ.
6. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
The cutoff frequency for stating the second low-pass filter circuit is 1.0GHZ.
7. the partial discharge location device according to claim 1 for having the function of to shield low frequency and high noisy, which is characterized in that institute
It states amplifying circuit and fixes amplification 40DB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352390.9A CN108051713A (en) | 2017-12-15 | 2017-12-15 | There is the partial discharge location device for shielding low frequency and high noisy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711352390.9A CN108051713A (en) | 2017-12-15 | 2017-12-15 | There is the partial discharge location device for shielding low frequency and high noisy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108051713A true CN108051713A (en) | 2018-05-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711352390.9A Withdrawn CN108051713A (en) | 2017-12-15 | 2017-12-15 | There is the partial discharge location device for shielding low frequency and high noisy |
Country Status (1)
| Country | Link |
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| CN (1) | CN108051713A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109633388A (en) * | 2018-12-10 | 2019-04-16 | 国网宁夏电力有限公司电力科学研究院 | A kind of partial discharge sensing device of multi-functional super-high frequency |
| CN111812463A (en) * | 2020-06-10 | 2020-10-23 | 深圳供电局有限公司 | High-frequency partial discharge detection system and method |
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| CN106771922A (en) * | 2016-12-28 | 2017-05-31 | 华中科技大学 | A kind of high-tension electricity system of detecting partial discharge in equipment and Recognition of Partial Discharge |
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Patent Citations (8)
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| CN204177918U (en) * | 2014-11-25 | 2015-02-25 | 国家电网公司 | A kind of underground cable shelf depreciation double-core on-Line Monitor Device |
| CN107251423A (en) * | 2015-02-20 | 2017-10-13 | 株式会社村田制作所 | High frequency filter, high-frequency front-end circuit, the design method of communication equipment and high frequency filter |
| CN104868875A (en) * | 2015-05-13 | 2015-08-26 | 熊猫电子集团有限公司 | Ultrashort-wave matrix-type filter bank |
| CN105162478A (en) * | 2015-07-16 | 2015-12-16 | 中国电子科技集团公司第四十一研究所 | Short-wave receiver preselecting filter circuit and method |
| CN205249157U (en) * | 2015-12-30 | 2016-05-18 | 河北浩正电力设备制造有限公司 | Intelligence matrix wave filter treatment circuit |
| CN205786851U (en) * | 2016-06-01 | 2016-12-07 | 珠海颐迈越科技有限公司 | It is applicable to the operating frequency phase detection portable unit of Intelligent high voltage switch cabinet |
| CN106771922A (en) * | 2016-12-28 | 2017-05-31 | 华中科技大学 | A kind of high-tension electricity system of detecting partial discharge in equipment and Recognition of Partial Discharge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633388A (en) * | 2018-12-10 | 2019-04-16 | 国网宁夏电力有限公司电力科学研究院 | A kind of partial discharge sensing device of multi-functional super-high frequency |
| CN111812463A (en) * | 2020-06-10 | 2020-10-23 | 深圳供电局有限公司 | High-frequency partial discharge detection system and method |
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Application publication date: 20180518 |
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| WW01 | Invention patent application withdrawn after publication |