CN204789763U - Circuit iron tower ground net impulse grounding impedance measuring apparatu - Google Patents
Circuit iron tower ground net impulse grounding impedance measuring apparatu Download PDFInfo
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- CN204789763U CN204789763U CN201520280904.4U CN201520280904U CN204789763U CN 204789763 U CN204789763 U CN 204789763U CN 201520280904 U CN201520280904 U CN 201520280904U CN 204789763 U CN204789763 U CN 204789763U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 6
- 229910052742 iron Inorganic materials 0.000 title abstract description 3
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 230000001052 transient effect Effects 0.000 claims description 20
- 238000013500 data storage Methods 0.000 claims description 14
- 210000000352 storage cell Anatomy 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000004364 calculation method Methods 0.000 abstract description 5
- 239000004744 fabric Substances 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
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Abstract
The utility model discloses a circuit iron tower ground net impulse grounding impedance measuring apparatu comprises impulse current generator, impulse current collector, impulse voltage collector, and wherein the impulse voltage collector has three routes peak voltage synchronous measurement function. The measurement is constituteed the current test return circuit and is constituteed three routes current potential test loop and constituteed by earthing device, impulse voltage collector, the three voltage utmost point and line, the earth by impulse current generator, earthing device, impulse current collector, the electric current utmost point and line, the earth, implements: electric current pole position dGC according to the biggest diagonal fivefold of earth mat and perpendicularily the screen cloth put voltage pole span earth mat edge 0.55dGC, 0.6dGC, 0.65dGC distance to arrange the voltage utmost point on with the straight line, test, obtain the three peak voltage value under the same measuring current, carry out error calculation, in being less than 5% survey value by survey current potential fractional error, select the minimum survey value of fractional error, calculate earth mat impulse grounding resistance value.
Description
Technical field
The utility model belongs to electrotechnical measurement field, for the measurement of extra high voltage network steel tower grounded screen Transient grounding resistance.
Background technology
Being defined as Transient grounding resistance in DL/T266-2012 " earthing device impact characteristics parameter testing directive/guide ": under dash current effect, earthing device is to the impedance of distant place zero potential point, is numerically the potential difference (PD) between earthing device and distant place zero potential point and the ratio being flowed into the dash current in ground by earthing device.National regulations iron tower of power transmission line grounded screen Transient grounding resistance is measured, electric current pole position d
gCdoubly arrange by grounded screen diagonal line maximum length 4-5, itself and grounded screen edge-perpendicular distance d
gCrepresent, general 220KV steel tower grounded screen diagonal line is about 15m, 500KV steel tower grounded screen diagonal line is about 20m, 750KV steel tower grounded screen diagonal line is about 30m, and the method for arranging of voltage pole adopts fall-of-potential method, and its method is, voltage pole P from tested grounded screen G edge to electric current pole C about 0.6 times of d
gClocation arrangements, movable during measurement, when tested current potential relative error change is less than 5%, the position d of voltage pole can be defined as
gP, carry out measurements and calculations, because impulse current generator discharges to the current return measured by grounded screen decanting point E at every turn, institute's output current value has certain change, and the measuring error of impact current for measuring instrument in test, the accuracy of measurement that all directly impact is final, in addition during reality is tested at the scene, determine position, virtual voltage pole and the potential measurement value of steel tower grounded screen Transient grounding resistance survey calculation, also the accuracy of impedance measurements can be reduced, also give the determination of position, virtual voltage pole in test simultaneously, bring larger workload, required time is longer.
Summary of the invention
The technical solution of the utility model solves like this: a kind of line steel tower grounded screen Transient grounding resistance measuring instrument, by impulse current generator (1), dash current collector (2), surge voltage collector (3) forms, wherein dash current collector (2), by a current sensor, first data processing unit, first data storage cell, first display unit and the first power supply unit composition, current sensor is contactless Luo-coil, the wire in dash current loop is through elementary as current sensor of current sensor, for obtaining the current signal of current return in test, current sensor output cable connects the input end of data processing unit, data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by current transformer and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained signal is exported to the first display unit and the first data storage cell respectively, first display unit is one piece of LCDs, first data record unit is memory card reader, first power supply unit is accumulator, wherein surge voltage collector (3) is by three crest voltage measuring units, second data processing unit, second data storage cell, second display unit and the second power supply unit composition, three crest voltage measuring units are peak-reading voltmeter, for obtaining surge voltage signal, peak-reading voltmeter output terminal cable connects the input end of the second data processing unit, second data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by three crest voltage measuring units and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained digital signal is exported to the second display unit and the second data storage cell respectively, second display unit is one piece of LCDs, second data record unit is memory card reader, second power supply unit is accumulator.
A kind of line steel tower grounded screen Transient grounding resistance measuring instrument of the present utility model and measuring method, contribute in steel tower grounded screen Transient grounding resistance is measured, improve the efficiency determining position, virtual voltage pole, and can eliminate in the measurement of existing steel tower grounded screen Transient grounding resistance, because of repeatedly cloth pole, measure inconsistent the brought composite measurement error of electric current, improve measuring accuracy, increase work efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of line steel tower grounded screen Transient grounding resistance measuring instrument structured flowchart;
In accompanying drawing 1, a kind of line steel tower grounded screen Transient grounding resistance measuring instrument, is made up of impulse current generator (1), dash current collector (2), surge voltage collector (3).
Accompanying drawing 2 is the utility model measuring principle schematic diagram;
In accompanying drawing 2, steel tower grounded screen Transient grounding resistance is measured, form dash current test loop by impulse current generator (1), earthing device G, dash current collector (2), electric current pole C and line, the earth, form three impact potential test loops, tunnels by earthing device G, surge voltage collector (3), three voltage poles and line, the earth and form.
Below in conjunction with accompanying drawing 1 and accompanying drawing 2, the content to invention is described in further detail.
Accompanying drawing 1 is the utility model structured flowchart, a kind of line steel tower grounded screen Transient grounding resistance measuring instrument, by impulse current generator (1), dash current collector (2), surge voltage collector (3) forms, wherein dash current collector (2) is by a current sensor, first data processing unit, first data storage cell, first display unit and the first power supply unit composition, wherein surge voltage collector (3) is by three crest voltage measuring units, second data processing unit, second data storage cell, second display unit and the second power supply unit composition, impulse current generator is on sale on the market.
Accompanying drawing 2: be the utility model measuring principle schematic diagram, the measuring circuit that steel tower grounded screen Transient grounding resistance is measured, dash current test loop is formed by impulse current generator (1), earthing device G, dash current collector (2), electric current pole C and line, the earth, with be made up of three tunnels earthing device G, surge voltage collector (3), three voltage poles and line, the earth and impacts potential test loops and form, specifically enforcement is: electric current pole position d
gCby grounded screen maximum diagonal length 5 times also vertical grounded screen edge placement, voltage pole is apart from tested grounded screen G edge-perpendicular 0.55d
gC, 0.6d
gC, 0.65d
gCdistance, and a voltage pole is arranged on same straight line, respectively, carry out potential difference (PD) test, obtain three peak voltage under identical measurement electric current, error calculation is carried out to it, be less than in the measured value of 5% in tested current potential relative error change, select the measured value that relative error is minimum, calculate the Transient grounding resistance value of tested steel tower grounded screen.
Embodiment
A kind of line steel tower grounded screen Transient grounding resistance measuring instrument, by impulse current generator (1), dash current collector (2), surge voltage collector (3) forms, wherein dash current collector (2), by a current sensor, first data processing unit, first data storage cell, first display unit and the first power supply unit composition, current sensor is contactless Luo-coil, the wire in dash current loop is through elementary as current sensor of current sensor, for obtaining the current signal of current return in test, current sensor output cable connects the input end of data processing unit, data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by current transformer and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained signal is exported to the first display unit and the first data storage cell respectively, first display unit is one piece of LCDs, first data record unit is memory card reader, first power supply unit is accumulator, wherein surge voltage collector (3) is by three crest voltage measuring units, second data processing unit, second data storage cell, second display unit and the second power supply unit composition, three crest voltage measuring units are peak-reading voltmeter, for obtaining surge voltage signal, peak-reading voltmeter output terminal cable connects the input end of the second data processing unit, second data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by three crest voltage measuring units and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained digital signal is exported to the second display unit and the second data storage cell respectively, second display unit is one piece of LCDs, second data record unit is memory card reader, second power supply unit is accumulator, impulse current generator (1) is on sale on the market.A kind of line steel tower grounded screen Transient grounding resistance measuring instrument, to the measuring circuit that steel tower grounded screen Transient grounding resistance is measured, dash current test loop is formed by impulse current generator (1), earthing device G, dash current collector (2), electric current pole C and line, the earth, with by earthing device G, surge voltage collector (3), three voltage poles and line, the earth form three tunnels impact potential test loops form, electric current pole position d
gCby grounded screen maximum diagonal length five times also vertical grounded screen edge placement, voltage pole is apart from tested grounded screen G edge-perpendicular 0.55d
gC, 0.6d
gC, 0.65d
gCdistance, and a voltage pole is arranged on same straight line, respectively, carry out potential difference (PD) test, obtain three peak voltage under identical measurement electric current, error calculation is carried out to it, be less than in the measured value of 5% in tested current potential relative error change, select the measured value that relative error is minimum, calculate the Transient grounding resistance value of tested steel tower grounded screen.
Claims (1)
1. a line steel tower grounded screen Transient grounding resistance measuring instrument, by impulse current generator (1), dash current collector (2), surge voltage collector (3) forms, wherein dash current collector (2), by a current sensor, first data processing unit, first data storage cell, first display unit and the first power supply unit composition, current sensor is contactless Luo-coil, the wire in dash current loop is through elementary as current sensor of current sensor, for obtaining the current signal of current return in test, current sensor output cable connects the input end of data processing unit, data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by current transformer and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained signal is exported to the first display unit and the first data storage cell respectively, first display unit is one piece of LCDs, first data record unit is memory card reader, first power supply unit is accumulator, wherein surge voltage collector (3) is by three crest voltage measuring units, second data processing unit, second data storage cell, second display unit and the second power supply unit composition, three crest voltage measuring units are peak-reading voltmeter, for obtaining surge voltage signal, peak-reading voltmeter output terminal cable connects the input end of the second data processing unit, second data processing unit is by measuring modular converter and industrial single-chip microcomputer forms, after the peak signal measured by three crest voltage measuring units and direct current signal are changed, change through digital signal again, obtain digital signal, and obtained digital signal is exported to the second display unit and the second data storage cell respectively, second display unit is one piece of LCDs, second data record unit is memory card reader, second power supply unit is accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280904.4U CN204789763U (en) | 2015-05-05 | 2015-05-05 | Circuit iron tower ground net impulse grounding impedance measuring apparatu |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520280904.4U CN204789763U (en) | 2015-05-05 | 2015-05-05 | Circuit iron tower ground net impulse grounding impedance measuring apparatu |
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| Publication Number | Publication Date |
|---|---|
| CN204789763U true CN204789763U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520280904.4U Expired - Fee Related CN204789763U (en) | 2015-05-05 | 2015-05-05 | Circuit iron tower ground net impulse grounding impedance measuring apparatu |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045079A (en) * | 2017-05-28 | 2017-08-15 | 西南交通大学 | One kind impact multi-party level monitoring system of diffusing and method |
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
-
2015
- 2015-05-05 CN CN201520280904.4U patent/CN204789763U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107045079A (en) * | 2017-05-28 | 2017-08-15 | 西南交通大学 | One kind impact multi-party level monitoring system of diffusing and method |
| CN107045079B (en) * | 2017-05-28 | 2019-05-03 | 西南交通大学 | A kind of multi-faceted monitoring System and method for of impact diffusing |
| CN107247189A (en) * | 2017-07-26 | 2017-10-13 | 云南电网有限责任公司电力科学研究院 | The test system and its method of a kind of Transient grounding resistance |
| CN107247189B (en) * | 2017-07-26 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Impact grounding impedance testing system and method thereof |
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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: 20151118 Termination date: 20160505 |