CN202661584U - Alternating-current voltage-withstanding resonance test device of electrical equipment in substations - Google Patents
Alternating-current voltage-withstanding resonance test device of electrical equipment in substations Download PDFInfo
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- CN202661584U CN202661584U CN 201220199070 CN201220199070U CN202661584U CN 202661584 U CN202661584 U CN 202661584U CN 201220199070 CN201220199070 CN 201220199070 CN 201220199070 U CN201220199070 U CN 201220199070U CN 202661584 U CN202661584 U CN 202661584U
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- frequency converter
- reactor
- withstanding
- voltage divider
- transformer
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Abstract
The utility model discloses an alternating-current voltage-withstanding resonance test device of electrical equipment in substations, comprising a frequency converter, an excitation transformer, an electric reactor, a capacitive voltage divider and a compensation capacitor. The input end of the frequency converter is a power input end and the output end of the frequency converter is connected with the input end of the excitation transformer; a first output end of the excitation transformer is connected with a first end of the electric reactor; a second end of the electric reactor is separately connected with one end of the capacitive voltage divider and one end of the compensation capacitor; the other end of the capacitive voltage divider and the other end of the compensation capacitor are connected with a second output end of the excitation transformer and are grounded; the capacitive voltage divider consists of two capacitors connected in series; a node between the two capacitors of the capacitive voltage divider is connected with a voltage division node of the frequency converter; and a second end of the electric reactor and a second output end of the excitation transformer are load ends. The alternating-current voltage-withstanding resonance test device of the electrical equipment in substations in the utility model has the advantages of small required power capacity, good output voltage waveform, no short-circuit current burning fault point, no recovery overvoltage, small volume and light weight.
Description
Technical field
The utility model relates to the Withstand test device of a kind of transformer station electric equipment, relates in particular to a kind of transformer station electric equipment ac voltage withstanding resonant experimental device.
Background technology
Substitute at present the power cable of original oil-filled paper oil insulation at international and domestic existing increasing crosslinked polyetylene insulated power cable (being called for short XLPE).But because tested capacity is large and testing equipment, still follow the test method of using DC break down voltage on the research technique before crosslinked cable puts into operation.The achievement in research of international, domestic a lot of research institutions shows that DC experiment has in various degree infringement to the XLPE twisted polyethylene cable in recent years.The research viewpoint that has thinks that the XLPE structure has the ability of storage accumulation unipolarity residual charge, when after DC experiment, as can not effectively dischargeing the direct current residual charge, add that at the direct current residual charge alternating voltage peak may cause cable to puncture after putting into operation.More domestic research institutions think that in the DC voltage withstand test of twisted polyethylene cable, because space charge effect, the applied electric field intensity of the comparable cable insulation of actual electrical field strength in the insulation is up to 11 times.Do not puncture even cross-linked polyethylene insulated cable has passed through DC experiment, can cause the major injury of insulation yet; Secondly because the DC voltage field strength distribution that applies is different from the alternating voltage field strength distribution of operation, DC experiment can not the real simulation running status under the cable superpotential of bearing, and effectively find defective on cable and cable splice itself and the construction technology.
Summary of the invention
The purpose of this utility model provides a kind of transformer station electric equipment ac voltage withstanding resonant experimental device with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises frequency converter, exciting transformer, reactor, capacitive divider and building-out capacitor, the input end of described frequency converter is power input, the output terminal of described frequency converter is connected with the input end of described exciting transformer, the first output terminal of described exciting transformer is connected with the first end of described reactor, the second end of described reactor respectively with an end of described capacitive divider be connected an end of building-out capacitor and be connected, the other end of described capacitive divider be connected that the other end of building-out capacitor all is connected with the second output terminal of described exciting transformer and ground connection, described capacitive divider is formed by two capacitances in series, node between two electric capacity of described capacitive divider is connected with the dividing potential drop node of described frequency converter, and the second end of described reactor and the second output terminal of described exciting transformer are load end.
Further, described reactor comprises the first reactor and second reactor of connection parallel with one another.
The beneficial effects of the utility model are:
The required power supply capacity of the utility model is little, output voltage waveforms good, without short-circuit current burn trouble spot, little, lightweight without restoring over-voltage, volume.
Description of drawings
Accompanying drawing is circuit structure diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
The utility model comprises frequency converter 1, exciting transformer 2, the first reactor 3, the second reactor 4, capacitive divider 5 and building-out capacitor 6, the input end of frequency converter 1 is power input Ui, the output terminal of frequency converter 1 is connected with the input end of exciting transformer 2, the first reactor 3 and the second reactor 4 formation Reactor banks that is connected in parallel, the first output terminal of exciting transformer 2 is connected with the first end of Reactor banks, the second end of Reactor banks is connected with the end that an end of capacitive divider 5 is connected with building-out capacitor respectively, the other end that the other end of capacitive divider 5 is connected with building-out capacitor all is connected with the second output terminal of exciting transformer 2 and ground connection, capacitive divider 5 is formed by two capacitances in series, node between two electric capacity of capacitive divider 5 is connected with the dividing potential drop node of frequency converter 1, and the second end of Reactor banks and the second output terminal of exciting transformer 2 are load end Uo.
As shown in drawings, during test, the power input Ui of tested electric equipment is accessed between the second output terminal of the second end that load end Uo of the present utility model is Reactor banks and exciting transformer 2, input end incoming transport voltage at frequency converter 1, by the output frequency of adjusting frequency converter 1 and the output voltage of exciting transformer 2, the voltage-withstand test demand that adapts to tested electric equipment reaches the purpose of electric equipment ac voltage withstanding resonance test.
Claims (2)
1. transformer station's electric equipment ac voltage withstanding resonant experimental device, it is characterized in that: comprise frequency converter, exciting transformer, reactor, capacitive divider and building-out capacitor, the input end of described frequency converter is power input, the output terminal of described frequency converter is connected with the input end of described exciting transformer, the first output terminal of described exciting transformer is connected with the first end of described reactor, the second end of described reactor respectively with an end of described capacitive divider be connected an end of building-out capacitor and be connected, the other end of described capacitive divider be connected that the other end of building-out capacitor all is connected with the second output terminal of described exciting transformer and ground connection, described capacitive divider is formed by two capacitances in series, node between two electric capacity of described capacitive divider is connected with the dividing potential drop node of described frequency converter, and the second end of described reactor and the second output terminal of described exciting transformer are load end.
2. transformer station according to claim 1 electric equipment ac voltage withstanding resonant experimental device, it is characterized in that: described reactor comprises the first reactor and second reactor of connection parallel with one another.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220199070 CN202661584U (en) | 2012-05-07 | 2012-05-07 | Alternating-current voltage-withstanding resonance test device of electrical equipment in substations |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220199070 CN202661584U (en) | 2012-05-07 | 2012-05-07 | Alternating-current voltage-withstanding resonance test device of electrical equipment in substations |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202661584U true CN202661584U (en) | 2013-01-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220199070 Expired - Fee Related CN202661584U (en) | 2012-05-07 | 2012-05-07 | Alternating-current voltage-withstanding resonance test device of electrical equipment in substations |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202661584U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389442A (en) * | 2012-05-07 | 2013-11-13 | 四川聚友生态农业科技有限公司 | Transformer substation electrical device alternating current withstand voltage resonance testing device |
| CN103558537A (en) * | 2013-11-01 | 2014-02-05 | 国家电网公司 | Circuit for testing overload tolerance capacity of series capacitor and working method of circuit |
-
2012
- 2012-05-07 CN CN 201220199070 patent/CN202661584U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389442A (en) * | 2012-05-07 | 2013-11-13 | 四川聚友生态农业科技有限公司 | Transformer substation electrical device alternating current withstand voltage resonance testing device |
| CN103558537A (en) * | 2013-11-01 | 2014-02-05 | 国家电网公司 | Circuit for testing overload tolerance capacity of series capacitor and working method of circuit |
| CN103558537B (en) * | 2013-11-01 | 2015-12-30 | 国家电网公司 | The circuit of test series capacitor tolerance capability of overload and method of work thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20130507 |