CN110470907A - One kind drawing thunder earth loop impedance test device - Google Patents
One kind drawing thunder earth loop impedance test device Download PDFInfo
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- CN110470907A CN110470907A CN201910811721.3A CN201910811721A CN110470907A CN 110470907 A CN110470907 A CN 110470907A CN 201910811721 A CN201910811721 A CN 201910811721A CN 110470907 A CN110470907 A CN 110470907A
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- 239000003990 capacitor Substances 0.000 claims description 25
- 238000005259 measurement Methods 0.000 claims description 12
- 239000013307 optical fiber Substances 0.000 claims description 8
- 230000001052 transient effect Effects 0.000 abstract description 7
- 208000025274 Lightning injury Diseases 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/20—Measuring earth resistance; Measuring contact resistance, e.g. of earth connections, e.g. plates
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses one kind to draw thunder earth loop impedance test device, including grounded screen, thunder carrying-off device and drainage bar；One end of the drainage bar is connect with the grounded screen, and the other end is connect with the thunder carrying-off device；The test device further includes current measuring device, faraday cup, zero potential earthing rod and voltage measuring apparatus；The drainage bar runs through the faraday cup, the current measuring device is arranged on the drainage bar, the grounded screen is connect by the voltage measuring apparatus with the zero potential earthing rod, Transient grounding resistance of the earthing or grounding means in multiple lightning stroke can be tested, and the interference of strong-electromagnetic field caused by lightning current can be effectively reduced, so as to effectively improve the accuracy of test result, and improve the anti-interference of test device.
Description
Technical field
The present invention relates to thunder observation technical fields more particularly to one kind to draw thunder earth loop impedance test device.
Background technique
Transmission line of electricity is subject to be struck by lightning, and the impedance ground for reducing electric power line pole tower earthing or grounding means is to improve transmission line of electricity
The horizontal main measure of resistance to lightning stroke.The Transient grounding resistance of earthing or grounding means can most react property of earthing or grounding means when by being struck by lightning
Energy.In existing Transient grounding resistance test, it is unable to test withstand-lightning capability of earthing or grounding means when by multiple lightning stroke.Its
It is secondary, a strong-electromagnetic field will be generated when lightning current is flowed through in test device, around test device, it will be inevitably by the electricity
The interference in magnetic field, to influence the accuracy of test result.
Summary of the invention
The embodiment of the present invention provides one kind and draws thunder earth loop impedance test device, can test earthing or grounding means in multiple lightning stroke
Transient grounding resistance, the interference of electromagnetic field caused by lightning current can be effectively reduced, and then the standard of test result can be effectively improved
True property.
One embodiment of the invention provides one kind and draws thunder earth loop impedance test device, comprising:
Grounded screen, thunder carrying-off device and drainage bar；One end of the drainage bar is connect with the grounded screen, the other end with it is described
Thunder carrying-off device connection；
The test device further includes current measuring device, faraday cup, zero potential earthing rod and voltage measuring apparatus；Institute
Drainage bar is stated through the faraday cup, the current measuring device is arranged on the drainage bar, the voltage measuring apparatus
It is connect with the grounded screen, the zero potential earthing rod.
As an improvement of the above scheme, the thunder earth loop impedance test device that draws further includes test device；
The test device includes oscillograph and oscillograph；The oscillograph is connect with the current measuring device, described
Oscillograph is connect with the voltage measuring apparatus.
As an improvement of the above scheme, the thunder earth loop impedance test device that draws further includes the first electric light converter and second
Electric light converter；
First electric light converter and second electric light converter are arranged in the faraday cup；
The current measuring device is connect by the first cable with first electric light converter, the voltage measuring apparatus
It is connect by the second cable with second electric light converter.
As an improvement of the above scheme, the test device further includes the first photoelectric converter and the second photoelectric converter；
One end of first photoelectric converter is connect by the first optical fiber with first electric light converter, the other end and
The oscillograph connection；
One end of second photoelectric converter is connect by the second optical fiber with second electric light converter, the other end and
The oscillograph connection.
As an improvement of the above scheme, the current measuring device is coaxial shunt or current measurement coil.
As an improvement of the above scheme, the voltage measuring apparatus includes first capacitor and the second capacitor；
The first end of the first capacitor is connect with the grounded screen, the second end of the first capacitor and second electricity
The first end of appearance connects, and the second end of second capacitor is connect with the zero potential earthing rod；
The oscillograph is connected between the first capacitor and second capacitor.
Compared with prior art, disclosed by the embodiments of the present invention to draw thunder earth loop impedance test device, have following beneficial to effect
Fruit:
The thunder earth loop impedance test device that draws includes grounded screen, thunder carrying-off device and drainage bar；One end of the drainage bar
It is connect with the grounded screen, the other end is connect with the thunder carrying-off device；The test device further includes current measuring device, farad
Cage, zero potential earthing rod and voltage measuring apparatus；The drainage bar runs through the faraday cup, and the current measuring device is set
It sets on the drainage bar, the voltage measuring apparatus is connect with the grounded screen, the zero potential earthing rod.Pass through access
Current measuring device, test flow through the dash current of grounded screen, by accessing voltage measuring apparatus, test grounded screen and zero potential
Potential difference between earthing rod, and then Transient grounding resistance is calculated according to the dash current and the potential difference, so as to
Transient grounding resistance of the earthing or grounding means in multiple lightning stroke is tested, and by using faraday cup, lightning current can be effectively reduced and draw
The interference of the strong-electromagnetic field risen so as to effectively improve the accuracy of test result, and can effectively improve the anti-dry of test device
Immunity.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for drawing thunder earth loop impedance test device that one embodiment of the invention provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is a kind of structural schematic diagram for drawing thunder earth loop impedance test device that one embodiment of the invention provides, institute referring to Fig. 1
State that draw thunder earth loop impedance test device include: grounded screen 1, thunder carrying-off device 2 and drainage bar 3；One end of the drainage bar 3 with it is described
Grounded screen 1 connects, and the other end is connect with the thunder carrying-off device 2；
The test device further includes current measuring device 4, faraday cup 5, zero potential earthing rod 6 and voltage measuring apparatus
7；The drainage bar 3 runs through the faraday cup 5, and the current measuring device 4 is arranged on the drainage bar 3, the voltage
Measuring device 7 is connect with the grounded screen 1, the zero potential earthing rod 6.
In the present embodiment, drainage bar 3 is used to the thunder and lightning that thunder carrying-off device 2 guides being transferred to grounded screen.Preferably, described to draw
Flow post 3 is usually metallic rod.Thunder carrying-off device 2 is used to guide thunder and lightning to drainage bar by firing a rocket.Zero potential earthing rod
6, it can be Zero potential reference, and be arranged on the preset distance d of 1 central current decanting point of grounded screen.In the present embodiment
Zero potential earthing rod 6 is arranged at the position apart from grounded screen 91m.In turn, one end of voltage measuring apparatus 7 and grounded screen 1 connect
It connects, the other end is connect with zero potential earthing rod 6, realizes the potential difference between test grounded screen 1 and zero potential earthing rod 6.In addition,
By being arranged current measuring device 4 on drainage bar 3, realize that test flows through the lightning current of grounded screen 1, thus according to the ground connection
Potential difference between net 1 and zero potential earthing rod 6 and the lightning current for flowing through grounded screen 1, calculate the impulse grounding resistance of grounded screen 1
It is anti-.By using faraday cup 5, the interference of cage body inner electric field and outer electric field and electromagnetic wave can be effectively isolated.
Preferably, the current measuring device 4 is coaxial shunt or current measurement coil.
It should be noted that current measurement coil measurement lightning current can be used when lightning current is larger；Work as dash current
When smaller, coaxial shunt measurement lightning current can be used.Wherein, current measurement coil can be Pearson's coil.
In an alternative embodiment, referring to Figure 1, the thunder earth loop impedance test device that draws further includes test device
8；
The test device 8 includes oscillograph 81 and oscillograph 82；The oscillograph 81 connects with the current measuring device 4
It connects, the oscillograph 82 is connect with the voltage measuring apparatus 7.
Preferably, waveform of the oscillograph 81 for the lightning current signals of record current measuring device 4.Recording in the present embodiment
Device 81 uses HBM model.Waveform of the oscillograph 82 for the potential difference signal of recording voltage measuring device 7.Show in the present embodiment
Wave device 82 uses DL850 model.
In an alternative embodiment, referring to Figure 1, the thunder earth loop impedance test device that draws further includes the first electric light
Converter 51 and the second electric light converter 52；
First electric light converter 51 and second electric light converter 52 are arranged in the faraday cup 5；
The current measuring device 4 is connect by the first cable with first electric light converter 51, the voltage measurement
Device 7 is connect by the second cable with second electric light converter 52.
It should be noted that the input terminal of the first electric light converter 51 passes through the first cable and the current measuring device 4
Output end connection, the lightning current for measuring current measuring device 4 is converted to corresponding electric current optical signal.Second electric light
The input terminal of converter 52 is connect by the second cable with the output end of the voltage measuring apparatus 7, for filling voltage measurement
It sets the potential difference that 7 measure and is converted to corresponding voltage optical signal.
Further, the test device 8 further includes the first photoelectric converter 83 and the second photoelectric converter 84；
One end of first photoelectric converter 83 is connect by the first optical fiber with first electric light converter 51, another
End is connect with the oscillograph 81；
One end of second photoelectric converter 84 is connect by the second optical fiber with second electric light converter 52, another
End is connect with the oscillograph 82.
It should be noted that the input terminal of the first photoelectric converter 83 passes through the first optical fiber and first electro-optical sensor
51 connections, output end are connect with the input terminal of the oscillograph 81.First photoelectric sensor 83 is used for the electric current optical signal
It is reduced to its corresponding lightning current, and the thunder and lightning after reduction is streamed to oscillograph 81 to record the waveform of lightning current.Second
The input terminal of photoelectric converter 84 is connect by the second optical fiber with second electro-optical sensor 52, output end and the oscillograph
82 input terminal connection.Second photoelectric sensor 84 is used to for the voltage optical signal being reduced to its corresponding potential difference, and will
Potential difference after reduction is transferred to oscillograph 82 to record the waveform of potential difference.
The present embodiment by access the first electric light converter 51, the second electric light converter 52, the first photoelectric converter 83 and
Second photoelectric converter 84, is converted to optical signal for the electric signal of lightning current, potential difference respectively, since the propagation of optical signal is by electricity
The influence in magnetic field is smaller, therefore can effectively avoid the measurement result of current measuring device 4 and voltage measuring apparatus 7 by electromagnetic field
Interference, and then the accuracy of the test result of test device can be effectively improved.
In an alternative embodiment, referring to Figure 1, the voltage measuring apparatus 7 includes first capacitor C1 and second
Capacitor C2.Since the voltage of lightning current is excessive, the present embodiment is divided using first capacitor C1 and the second capacitor C2, to keep away
Exempt to damage test device.
Wherein, the first end of the first capacitor C1 is connect with the grounded screen 1, the second end of the first capacitor C1 with
The first end of the second capacitor C2 connects, and the second end of the second capacitor C2 is connect with the zero potential earthing rod 6；
The oscillograph 82 is connected between the first capacitor C1 and the second capacitor C2.
One kind provided in an embodiment of the present invention draws thunder earth loop impedance test device, draws thunder earth loop impedance test dress by described
It sets including grounded screen, thunder carrying-off device and drainage bar；One end of the drainage bar is connect with the grounded screen, and the other end draws with described
The connection of thunder device；The test device further includes current measuring device, faraday cup, zero potential earthing rod and voltage measurement dress
It sets；The drainage bar runs through the faraday cup, and the current measuring device is arranged on the drainage bar, the voltage measurement
Device is connect with the grounded screen, the zero potential earthing rod.By accessing current measuring device, test flows through grounded screen
Dash current tests the potential difference between grounded screen and zero potential earthing rod, and then according to institute by accessing voltage measuring apparatus
It states dash current and the potential difference calculates Transient grounding resistance, so as to test impact of the earthing or grounding means in multiple lightning stroke
Impedance ground, and by using faraday cup, the interference of strong-electromagnetic field caused by lightning current can be effectively reduced, so as to effectively mention
The accuracy of high test result, and the anti-interference of test device can be effectively improved.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (6)
1. one kind draws thunder earth loop impedance test device characterized by comprising
Grounded screen, thunder carrying-off device and drainage bar；One end of the drainage bar is connect with the grounded screen, and the other end draws thunder with described
Device connection；
The test device further includes current measuring device, faraday cup, zero potential earthing rod and voltage measuring apparatus；It is described to draw
Flow post runs through the faraday cup, and the current measuring device is arranged on the drainage bar, the voltage measuring apparatus with
The grounded screen, zero potential earthing rod connection.
2. drawing thunder earth loop impedance test device as described in claim 1, which is characterized in that described to draw thunder earth loop impedance test dress
Setting further includes test device；
The test device includes oscillograph and oscillograph；The oscillograph is connect with the current measuring device, the oscillography
Device is connect with the voltage measuring apparatus.
3. drawing thunder earth loop impedance test device as described in claim 1, which is characterized in that described to draw thunder earth loop impedance test dress
Set further includes the first electric light converter and the second electric light converter；
First electric light converter and second electric light converter are arranged in the faraday cup；
The current measuring device is connect by the first cable with first electric light converter, and the voltage measuring apparatus passes through
Second cable is connect with second electric light converter.
4. drawing thunder earth loop impedance test device as described in claim 2 and 3, which is characterized in that the test device further includes
First photoelectric converter and the second photoelectric converter；
One end of first photoelectric converter is connect by the first optical fiber with first electric light converter, the other end with it is described
Oscillograph connection；
One end of second photoelectric converter is connect by the second optical fiber with second electric light converter, the other end with it is described
Oscillograph connection.
5. drawing thunder earth loop impedance test device as described in claim 1, which is characterized in that the current measuring device is coaxial
Current divider or current measurement coil.
6. drawing thunder earth loop impedance test device as claimed in claim 2, which is characterized in that the voltage measuring apparatus includes the
One capacitor and the second capacitor；
The first end of the first capacitor is connect with the grounded screen, the second end of the first capacitor and second capacitor
First end connection, the second end of second capacitor are connect with the zero potential earthing rod；
The oscillograph is connected between the first capacitor and second capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910811721.3A CN110470907A (en) | 2019-08-30 | 2019-08-30 | One kind drawing thunder earth loop impedance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910811721.3A CN110470907A (en) | 2019-08-30 | 2019-08-30 | One kind drawing thunder earth loop impedance test device |
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| Publication Number | Publication Date |
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| CN110470907A true CN110470907A (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910811721.3A Pending CN110470907A (en) | 2019-08-30 | 2019-08-30 | One kind drawing thunder earth loop impedance test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
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| CN106707031A (en) * | 2016-12-29 | 2017-05-24 | 国家电网公司 | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety |
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2019
- 2019-08-30 CN CN201910811721.3A patent/CN110470907A/en active Pending
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| CN104698352A (en) * | 2015-02-17 | 2015-06-10 | 南京信息工程大学 | Device and method for measuring small gap discharge time delay |
| CN106707031A (en) * | 2016-12-29 | 2017-05-24 | 国家电网公司 | System and method for measuring impulse grounding impedance based on optical fiber transmission and insulation safety |
| CN107390031A (en) * | 2017-08-04 | 2017-11-24 | 南方电网科学研究院有限责任公司 | A kind of mesh grounding impedance test device and its method of testing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113608031A (en) * | 2021-08-04 | 2021-11-05 | 北京英瑞来科技有限公司 | Method and device for monitoring impulse impedance of transformer substation lightning arrester |
| CN113608031B (en) * | 2021-08-04 | 2024-02-02 | 北京英瑞来科技有限公司 | Impact impedance monitoring method and device for substation lightning arrester |
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Application publication date: 20191119 |
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