CN203745595U - Power frequency tolerance test device for series compensated apparatus MOV - Google Patents
Power frequency tolerance test device for series compensated apparatus MOV Download PDFInfo
- Publication number
- CN203745595U CN203745595U CN201320825081.XU CN201320825081U CN203745595U CN 203745595 U CN203745595 U CN 203745595U CN 201320825081 U CN201320825081 U CN 201320825081U CN 203745595 U CN203745595 U CN 203745595U
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- Prior art keywords
- mov
- voltage
- power frequency
- switch
- measuring
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
The utility model discloses a power frequency tolerance test device for a series compensated apparatus MOV. A test loop comprises a power supply, a boosting transformer, a switch C1 and a switch G1, a generator is connected with the switch C1 and then is connected with the primary side of the boosting transformer, the secondary side of the boosting transformer is connected with the switch C1 and an inductor L, and then is connected with the sample to be tested, the secondary terminal of the boosting transformer is connected with a voltage measuring device for measuring the voltage across the secondary terminal, the sample to be tested is connected in series with a diverter for measuring the discharging current through the sample, and the sample to be tested is also connected with a voltage measuring device for measuring the voltage across the two ends of the sample. The problem that in an equivalent square wave energy tolerance loop specified in the present standard, only energy absorption problem of the series compensated apparatus MOV is checked, and real electric stress and power frequency endurance capacity of the series compensated apparatus MOV under the power frequency overvoltage condition are not considered is solved. The power frequency tolerance test device for the series compensated apparatus MOV provides effective test data and guarantee to the reliable operation of the MOV.
Description
Technical field
The utility model relates to a kind of string and mends the power frequency withstand testing equipment of device MOV.
Background technology
China was improving power transmission quality and was advocating under the prerequisite of flexible transmission in recent years, build many high pressure strings and mended station, but mend in the process putting into operation at station a lot of accidents have occurred at string, especially 500kV string is mended MOV (metal oxide resistor) earth pressure release event, has had a strong impact on the normal use that string is mended device.
Wherein main fault type breaks down exactly under power-frequency overvoltage, mends the standard-required of MOV according to current string, and existing test unit only provides equivalent rectangular energy tolerance equipment, does not mend the equipment of device MOV power frequency withstand ability for testing string.Cannot verify really the tolerance of string benefit device MOV under power-frequency overvoltage, affect the safe operation that string is mended device MOV.
Summary of the invention
The purpose of this utility model is to provide a kind of string to mend the power frequency withstand testing equipment of device MOV, solves existing proving installation and cannot test string and mend the problem of device MOV power frequency withstand ability.
For reaching above object, the utility model takes following technical scheme to be achieved:
A kind of string mended the power frequency withstand testing equipment of device MOV, test loop comprises power supply, step-up transformer, switch C1 and switch G1, after generator connecting valve C1, be connected with step-up transformer primary side, step-up transformer secondary side connecting valve G1 with after inductance L, be connected with test product, step-up transformer secondary terminals is connected with the pressure tester of measuring its secondary terminals voltage, the shunt of its discharge current is measured in test product series connection, and test product is also connected with the pressure tester of measuring its both sides voltage.
The pressure tester of described step-up transformer secondary terminals is made up of capacitive divider and voltage table V1.
Formed by capacitive divider and voltage table V2 for the pressure tester of measuring test product voltage
The utility model has adopted power supply, step-up transformer, inductance and switch composition test loop, supply voltage provides power-frequency voltage by step-up transformer for test product, and change phase place by inductance, accurately control and be applied to the duration of power-frequency voltage on test product and trigger phase angle by switch C1 and G1, adopt different pressure tester to measure the residual voltage of supply voltage and test product, adopt shunt to measure the electric current of MOV.Real checking string is mended the tolerance of device MOV under power-frequency overvoltage, has ensured the safe operation that string is mended device MOV.
Brief description of the drawings
Fig. 1 is test loop of the present utility model structural representation;
Fig. 2 is simulation calculation equivalent measuring figure of the present utility model;
In figure: 1, generator; 2, step-up transformer; 3, switch C1; 4, switch G1; 5, voltage table V1; 6, voltage table V2; 7, shunt; 8, MOV test product.
Embodiment
As shown in Figure 1, string is mended device MOV power-frequency voltage resistance test equipment and is made up of generator 1, step-up transformer 2, switch C1 and switch G1 and inductance L etc., after generator 1 connecting valve C1, be connected with step-up transformer primary side, step-up transformer 2 secondary side connecting valve G1 with after inductance L, be connected with MOV test product 8, step-up transformer 2 secondary terminals are connected with the pressure tester of measuring its secondary terminals voltage, the shunt 7 of its discharge current is measured in 8 series connection of MOV test product, and test product is also connected with the pressure tester of measuring its both sides voltage.The voltage time being applied on test product is controlled by switch C1 and switch G1.
The pressure tester of described step-up transformer 2 secondary terminals is made up of capacitive divider and voltage table V1, formed by capacitive divider and voltage table V2 for the pressure tester of measuring test product voltage, voltage table V1 is used for measuring supply voltage, voltage table V2 is for measuring the residual voltage of MOV test product 8, MOV discharge current is measured by shunt 7, and MOV discharge current also can be measured by sample resistance or mutual inductor.
Process of the test and testing requirements: first combination switch C1 when test, adjust transformer 2 secondary terminals no-load voltages to setting value, voltage table V1 measures after secondary side voltage stabilization combination switch G1 again, apply voltages to preset time to test product, then cut-off switch C1, switch C1 and switch G1 control the clock signal being sent by timing control unit and come the operating mechanism of gauge tap, realize test product and apply voltage time and meet testing requirements.
If Fig. 2 is equivalent measuring figure of the present utility model, after power supply connection inductance and switch, for test product applies power-frequency voltage, by inductance phase modulation, exert pressure the time by switch control, complete the aptitude tests of test product power frequency withstand.The utility model has solved in the equivalent rectangular energy resistance test specifying in current standard, only examine string to mend device MOV energy absorption problem, do not consider string benefit device MOV real electric stress and power frequency withstand capability problems under power-frequency overvoltage, for the reliability service of MOV provides strong test figure and guarantee.
Claims (3)
1. go here and there and mend the power frequency withstand testing equipment of device MOV for one kind, it is characterized in that, test loop comprises power supply, step-up transformer (2), switch C1 and switch G1, after generator (1) connecting valve C1, be connected with step-up transformer primary side, step-up transformer (2) secondary side connecting valve G1 with after inductance L, be connected with test product, step-up transformer (2) secondary terminals is connected with the pressure tester of measuring its secondary terminals voltage, the shunt (7) of its discharge current is measured in test product series connection, and test product is also connected with the pressure tester of measuring its both sides voltage.
2. string according to claim 1 is mended the power frequency withstand testing equipment of device MOV, it is characterized in that, the pressure tester of described step-up transformer (2) secondary terminals is made up of capacitive divider and voltage table V1.
3. string according to claim 1 is mended the power frequency withstand testing equipment of device MOV, it is characterized in that, is made up of capacitive divider and voltage table V2 for the pressure tester of measuring test product voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320825081.XU CN203745595U (en) | 2013-12-13 | 2013-12-13 | Power frequency tolerance test device for series compensated apparatus MOV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320825081.XU CN203745595U (en) | 2013-12-13 | 2013-12-13 | Power frequency tolerance test device for series compensated apparatus MOV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203745595U true CN203745595U (en) | 2014-07-30 |
Family
ID=51345380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320825081.XU Expired - Lifetime CN203745595U (en) | 2013-12-13 | 2013-12-13 | Power frequency tolerance test device for series compensated apparatus MOV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203745595U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407243A (en) * | 2014-11-20 | 2015-03-11 | 国家电网公司 | Very fast transient overvoltage (VFTO) simulating experiment system and method of series compensation platform |
| 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 |
| CN109449888A (en) * | 2018-12-13 | 2019-03-08 | 国网冀北电力有限公司电力科学研究院 | Processing method and system after a kind of series compensation device MOV failure |
-
2013
- 2013-12-13 CN CN201320825081.XU patent/CN203745595U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104407243A (en) * | 2014-11-20 | 2015-03-11 | 国家电网公司 | Very fast transient overvoltage (VFTO) simulating experiment system and method of series compensation platform |
| 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 |
| CN109449888A (en) * | 2018-12-13 | 2019-03-08 | 国网冀北电力有限公司电力科学研究院 | Processing method and system after a kind of series compensation device MOV failure |
| CN109449888B (en) * | 2018-12-13 | 2024-03-19 | 国网冀北电力有限公司电力科学研究院 | Method and system for processing MOV fault of series compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |