CN106646051B - Lightning arrester testing device and method - Google Patents
Lightning arrester testing device and method Download PDFInfo
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- CN106646051B CN106646051B CN201611228000.2A CN201611228000A CN106646051B CN 106646051 B CN106646051 B CN 106646051B CN 201611228000 A CN201611228000 A CN 201611228000A CN 106646051 B CN106646051 B CN 106646051B
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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
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- Thermistors And Varistors (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a lightning arrester testing device and a method, comprising a variable frequency power supply, a transformer, a high voltage direct current power supply, a voltage divider, a shunt, a control unit and a measuring unit for detecting current signals and voltage signals of a lightning arrester to be tested; the output end of the variable frequency power supply is connected with a primary winding of a transformer, one end of a secondary winding of the transformer is connected with the positive electrode of a high-voltage direct current power supply, the negative electrode of the high-voltage direct current power supply and one end of a shunt are both grounded, the other end of the secondary winding of the transformer is connected with the other end of a voltage divider and one end of a lightning arrester to be tested, and the other end of the lightning arrester to be tested is connected with the other end of the shunt; the control unit is connected with the control end of the high-voltage direct-current power supply and the control end of the variable-frequency power supply, the device and the method realize the characteristic parameter measurement of the lightning arrester under the action of voltage waveforms with different voltage peaks and frequencies, and the device and the method are simple and easy to operate and have lower cost.
Description
Technical Field
the invention belongs to the technical field of lightning arrester tests, and relates to a lightning arrester test device and method.
background
the lightning arrester is an important protection electrical appliance of an electric power system, and is widely applied to alternating current and direct current electric power systems, the lightning arrester needs to bear voltage stress under different voltage waveforms, the selection of the operating parameters of the lightning arrester depends on the voltage stress characteristics of the lightning arrester under different amplitudes and different voltage waveforms, and the measurement and research of the characteristic parameters of the lightning arrester under different amplitudes and different voltage waveforms are very important for the matching of the lightning arrester and system parameters. The test of the arrester resistance card under different voltage waveforms is only carried out on a simulation back-to-back test device at present, the device is complex in structure, large in size, inconvenient in test operation and voltage waveform and amplitude adjustment, high in test cost and incapable of realizing voltage waveform output and test under different voltage peaks and different frequencies.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a lightning arrester testing device and method, which are used for measuring the characteristic parameters of a lightning arrester under the action of voltage waveforms with different voltage peaks and frequencies, and are simple and easy to operate and low in cost.
In order to achieve the aim, the lightning arrester testing device comprises a variable frequency power supply, a transformer, a high-voltage direct current power supply, a voltage divider, a current divider, a control unit and a measuring unit for detecting current signals and voltage signals of a lightning arrester to be tested;
The output end of the variable frequency power supply is connected with a primary winding of a transformer, one end of a secondary winding of the transformer is connected with the positive electrode of a high-voltage direct current power supply, the negative electrode of the high-voltage direct current power supply, one end of a shunt and one end of a voltage divider are all grounded, the other end of the secondary winding of the transformer is connected with the other end of the voltage divider and one end of a lightning arrester to be tested, and the other end of the lightning arrester to be tested is connected with the other end of;
The control unit is connected with the control end of the high-voltage direct-current power supply and the control end of the variable-frequency power supply.
The transformer to be tested is placed in the temperature-controllable test sample box.
The high-voltage direct-current power supply is connected with a first switch in parallel, wherein the control end of the first switch is connected with the output end of the control unit.
The variable frequency power supply is connected with a second switch in parallel, wherein the control end of the second switch is connected with the output end of the control unit.
The secondary winding of the transformer is grounded through a third switch, wherein the control end of the third switch is connected with the output end of the control unit.
and the secondary winding of the transformer is connected with a fourth switch in parallel, wherein the control end of the fourth switch is connected with the output end of the control unit.
The transformer is a fully insulated transformer.
The shunt is a resistance shunt or a current transformer coil.
The lightning arrester test method comprises the following steps: the control unit controls the variable frequency power supply to output a high-voltage alternating current voltage signal, the control unit controls the high-voltage direct current power supply to output a high-voltage direct current voltage signal, the high-voltage alternating current voltage signal and the high-voltage direct current voltage signal are overlapped to form a high-voltage combined voltage wave, then the high-voltage combined voltage wave acts on the lightning arrester to be tested, the measuring unit detects the voltage and current waveform of the lightning arrester to be tested, and outputs the voltage and current waveform of the lightning arrester to be tested.
the invention has the following beneficial effects:
the lightning arrester testing device and the method thereof control the variable frequency power supply to output a high-voltage alternating voltage signal, the control unit controls the high-voltage direct current power supply to output a high-voltage direct current voltage signal, the high-voltage alternating voltage signal and the high-voltage direct current voltage signal are superposed to form a high-voltage combined voltage wave and then act on the lightning arrester to be tested, wherein the variable frequency power supply can be controlled by the control unit to output high-voltage alternating signals with different frequencies, the high-voltage direct current power supply can be controlled by the control unit to output high-voltage direct current voltage signals with different voltage magnitudes, so as to form high-voltage combined voltage waves with different voltage peak values and frequencies, in addition, the voltage and current waveforms of the lightning arrester to be tested are detected by the measuring unit, and the voltage and current waveforms of the lightning arrester to be tested are output, so as to realize the characteristic parameter, and the operation is simple and easy, and the cost is lower.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The lightning arrester testing device comprises a first switch 1, a second switch 2, a third switch 3, a fourth switch 4, a high-voltage direct-current power supply 5, a variable-frequency power supply 6, a transformer 7, a voltage divider 8, a current divider 9, a lightning arrester to be tested 10, a measuring unit 11 and a control unit 12.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
Referring to fig. 1, the lightning arrester testing apparatus according to the present invention includes a variable frequency power supply 6, a transformer 7, a high voltage dc power supply 5, a voltage divider 8, a shunt 9, a control unit 12, and a measuring unit 11 for detecting a current signal and a voltage signal of a lightning arrester 10 to be tested; the output end of the variable frequency power supply 6 is connected with a primary winding of a transformer 7, one end of a secondary winding of the transformer 7 is connected with the positive electrode of the high-voltage direct current power supply 5, the negative electrode of the high-voltage direct current power supply 5, one end of a shunt 9 and one end of a voltage divider are all grounded, the other end of the secondary winding of the transformer 7 is connected with the other end of the voltage divider 8 and one end of a lightning arrester 10 to be tested, and the other end of the lightning arrester 10 to be tested is connected with the other end of the; the control unit 12 is connected with the control end of the high-voltage direct-current power supply 5 and the control end of the variable-frequency power supply 6.
The transformer 7 to be tested is placed in the temperature-controllable test sample box; the high-voltage direct-current power supply 5 is connected with a first switch 1 in parallel, wherein the control end of the first switch 1 is connected with the output end of the control unit 12; the variable frequency power supply 6 is connected with a second switch 2 in parallel, wherein the control end of the second switch 2 is connected with the output end of the control unit 12; the secondary winding of the transformer 7 is grounded through a third switch 3, wherein the control end of the third switch 3 is connected with the output end of the control unit 12; the secondary winding of the transformer 7 is connected in parallel with a fourth switch 4, wherein a control terminal of the fourth switch 4 is connected with an output terminal of the control unit 12. The transformer 7 is a fully insulated transformer; the shunt 9 is a resistive shunt or a current transformer coil.
The lightning arrester test method comprises the following steps: the control unit 12 controls the variable frequency power supply 6 to output a high-voltage alternating current voltage signal, the control unit 12 controls the high-voltage direct current power supply 5 to output a high-voltage direct current voltage signal, the high-voltage alternating current voltage signal and the high-voltage direct current voltage signal are overlapped to form a high-voltage combined voltage wave, then the high-voltage combined voltage wave acts on the lightning arrester 10 to be tested, the measuring unit 11 detects the voltage and current wave forms of the lightning arrester 10 to be tested, and outputs the voltage and current wave forms of the lightning arrester 10 to be tested.
it should be noted that the voltage divider 8 is connected in parallel with the lightning arrester 10 to be tested, and the shunt 9 is connected in series with the lightning arrester 10 to be tested, so that the measurement unit 11 detects the current waveform on the shunt 9, and the measurement unit 11 detects the voltage waveform on the voltage divider 8, thereby measuring the voltage and current waveforms on the lightning arrester 10 to be tested.
The combination of the high-voltage direct-current power supply 5 and the transformer 7 is converted by controlling the third switch 3 and the fourth switch 4, so that different high-voltage waveforms of 0kV to 10kV can be output.
The measuring unit 11 transmits the measured voltage and current waveforms to the external upper computer, and a user can know the voltage and current waveforms measured by the measuring unit 11 through the external upper computer.
The variable frequency power supply 6 is controlled by the control unit 12 to output high-voltage alternating-current voltages with different frequencies, the first switch 1 and the second switch 2 are closed, the third switch 3 and the fourth switch 4 are opened, high-voltage combined voltage waves are output, the variable frequency power supply 6 is controlled by the control unit 12 to output the high-voltage combined voltage waves with different frequencies, and finally voltage and current waveforms of the lightning arrester 10 to be tested are collected into the measuring unit 11 through the voltage divider 8 and the current divider 9.
In specific operation, when stable voltage needs to be applied to the lightning arrester 10 to be tested for a long time, the measuring unit 11 acquires the voltage signal waveform of the lightning arrester 10 to be tested by using the acquisition card, and feeds the voltage signal waveform of the lightning arrester 10 to be tested back to the control unit 12, and the control unit 12 compares the voltage signal waveform of the lightning arrester 10 to be tested with a preset threshold value and controls the high-voltage direct-current power supply 5 and the variable-frequency power supply 6 according to the comparison result, so that the voltage applied to the lightning arrester 10 to be tested is stable.
Claims (4)
1. The lightning arrester testing device is characterized by comprising a variable frequency power supply (6), a transformer (7), a high-voltage direct current power supply (5), a voltage divider (8), a current divider (9), a control unit (12) and a measuring unit (11) for detecting current signals and voltage signals of a lightning arrester (10) to be tested;
The output end of the variable frequency power supply (6) is connected with a primary winding of a transformer (7), one end of a secondary winding of the transformer (7) is connected with the positive electrode of the high-voltage direct current power supply (5), the negative electrode of the high-voltage direct current power supply (5), one end of a shunt (9) and one end of a voltage divider are all grounded, the other end of the secondary winding of the transformer (7) is connected with the other end of the voltage divider (8) and one end of a lightning arrester (10) to be tested, and the other end of the lightning arrester (10) to be tested is connected with the other end of the shunt (9);
The control unit (12) is connected with the control end of the high-voltage direct-current power supply (5) and the control end of the variable-frequency power supply (6);
the high-voltage direct-current power supply (5) is connected with a first switch (1) in parallel, wherein the control end of the first switch (1) is connected with the output end of the control unit (12);
The variable frequency power supply (6) is connected with a second switch (2) in parallel, wherein the control end of the second switch (2) is connected with the output end of the control unit (12);
The secondary winding of the transformer (7) is grounded through a third switch (3), wherein the control end of the third switch (3) is connected with the output end of the control unit (12);
The secondary winding of the transformer (7) is connected with a fourth switch (4) in parallel, wherein the control end of the fourth switch (4) is connected with the output end of the control unit (12).
2. a lightning arrester testing device according to claim 1, characterized in that the transformer (7) is a fully insulated transformer.
3. A lightning arrester testing device according to claim 1, characterized in that the shunt (9) is a resistive shunt or a current transformer coil.
4. An arrester testing method, characterized in that the arrester testing apparatus according to claim 1 includes the steps of: the control unit (12) controls the variable frequency power supply (6) to output a high-voltage alternating current voltage signal, the control unit (12) controls the high-voltage direct current power supply (5) to output a high-voltage direct current voltage signal, the high-voltage alternating current voltage signal and the high-voltage direct current voltage signal are overlapped to form a high-voltage combined voltage wave, then the high-voltage combined voltage wave acts on the lightning arrester (10) to be tested, the measuring unit (11) detects the voltage and current waveform of the lightning arrester (10) to be tested, and outputs the voltage and current waveform of the lightning arrester (10) to be tested.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611228000.2A CN106646051B (en) | 2016-12-27 | 2016-12-27 | Lightning arrester testing device and method |
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| CN201611228000.2A CN106646051B (en) | 2016-12-27 | 2016-12-27 | Lightning arrester testing device and method |
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| CN106646051A CN106646051A (en) | 2017-05-10 |
| CN106646051B true CN106646051B (en) | 2019-12-13 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110531209A (en) * | 2019-09-23 | 2019-12-03 | 南方电网科学研究院有限责任公司 | Lightning arrester resistor sheet side glaze leakage current test system |
| CN111505420B (en) * | 2020-04-29 | 2022-03-08 | 国网陕西省电力公司电力科学研究院 | Online monitoring and diagnosing method and system for state of line arrester |
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| JPH0493668A (en) * | 1990-08-03 | 1992-03-26 | Hitachi Ltd | Preventive maintenance system of lightning arrester for ac-to-dc converter |
| CN101887073A (en) * | 2009-05-13 | 2010-11-17 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
| CN103675624A (en) * | 2013-12-13 | 2014-03-26 | 中国西电电气股份有限公司 | Power-frequency voltage testing device and testing method of lightning arrester |
| CN203630197U (en) * | 2013-12-13 | 2014-06-04 | 中国西电电气股份有限公司 | An arrester power frequency current testing apparatus |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN104459501A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Lightning arrester power frequency testing device and method |
-
2016
- 2016-12-27 CN CN201611228000.2A patent/CN106646051B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0493668A (en) * | 1990-08-03 | 1992-03-26 | Hitachi Ltd | Preventive maintenance system of lightning arrester for ac-to-dc converter |
| CN101887073A (en) * | 2009-05-13 | 2010-11-17 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
| CN103675624A (en) * | 2013-12-13 | 2014-03-26 | 中国西电电气股份有限公司 | Power-frequency voltage testing device and testing method of lightning arrester |
| CN203630197U (en) * | 2013-12-13 | 2014-06-04 | 中国西电电气股份有限公司 | An arrester power frequency current testing apparatus |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN104459501A (en) * | 2014-12-25 | 2015-03-25 | 中国西电电气股份有限公司 | Lightning arrester power frequency testing device and method |
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