CN104793116A - Voltage withstand test device for large-capacity equipment - Google Patents
Voltage withstand test device for large-capacity equipment Download PDFInfo
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- CN104793116A CN104793116A CN201510209294.3A CN201510209294A CN104793116A CN 104793116 A CN104793116 A CN 104793116A CN 201510209294 A CN201510209294 A CN 201510209294A CN 104793116 A CN104793116 A CN 104793116A
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Abstract
The invention relates to a voltage withstand test device for large-capacity equipment. The voltage withstand test device is characterized by being composed of an oil-immersed type double-coiling single-phase transformer with air gaps in an iron ammonium sulfate bath circuit and a capacitive voltage divider parallelly connected with the same. By the arrangement, a booster function of the transformer is achieved, a resonant inductance function provided by parallelly connected electric reactors is achieved, calculating selection is not needed before a test, disassembling and assembling during the test are not needed, wire connection is avoided, other test connecting wires can be directly connected for the test, on-side working efficiency can be effectively improved, and simpleness in operation and convenience in use are achieved.
Description
Technical field
The present invention relates to a kind of parallel resonance Withstand test device, particularly a kind of high capacitance equipment Withstand test device.
Background technology
In electric field high-potting, for the AC voltage withstand test of the withstand voltage test especially cable of high capacitance equipment, usually parallel resonance device to be used, the exciting transformer of this apparatus main body, resonance reactor are split equipment, and each test will select exciting transformer and the resonance reactor of capacity suitable according to the electric capacity of tested cable.In testing ground, all to be connected with resonance reactor exciting transformer at every turn, affect work efficiency.And, if the electric cable capacitance amount parameter that provides of unit in charge of construction and cable actual capacitance parameter have deviation, the exciting transformer selected and resonance reactor off-capacity may be caused, can not testing requirements be met, AC voltage withstand test cannot be completed by regulatory requirements.
Summary of the invention
The object of the invention is to overcome existing deficiency, a kind of high capacitance equipment Withstand test device being specifically designed to cable AC voltage withstand test is provided.
The object of the present invention is achieved like this: a kind of high capacitance equipment Withstand test device, it is characterized in that it has the two spiral single transformers of the oil immersed type of air gap and the capacitive divider in parallel with it to form by iron circuit.
The two spiral single transformer of described oil immersed type is connected with three-phase alternating-current supply by frequency changing power device.
Described capacitive divider is in parallel with tested device.
The iron circuit of the two spiral single transformer of oil immersed type has air gap, by regulating the length of iron circuit air gap, continually varying inductance is obtained at high voltage side of transformer, this inductance is used as the resonant inductance in shunt-resonant circuit, make the ground capacitance generation resonance of itself and tested device, complete AC voltage withstand test.
Namely the present invention had both had transformer boost effect, also there is the effect that shunt reactor provides resonant inductance, calculating need not be carried out before test respectively select, disassembly and assembly are not needed in test, need not line be carried out, directly can connect other test connections and test, can effectively improve work on the spot efficiency, simple to operate, easy to use.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention;
Fig. 2, Fig. 3 are the two spiral single transformer structural representations of oil immersed type of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 1, by iron circuit have the two spiral single transformer of the oil immersed type of air gap (3) and the capacitive divider in parallel with it (4) form, capacitive divider and tested device are (5) in parallel.(1) (2) the two spiral single transformer of oil immersed type be connected with three-phase alternating-current supply by frequency changing power device.
Three-phase alternating-current supply is connected to variable-frequency power sources and is connected to the two spiral single transformer low-pressure side of oil immersed type, as the power supply of whole resonant circuit, by the high-pressure side of the two spiral single transformer of oil immersed type for resonant tank provides trial voltage, now this transformer is equivalent to exciting transformer.Meanwhile, regulate the air gap of the two spiral monophase transformer core of oil immersed type, change the inductance value of this transformer high-voltage winding, form shunt-resonant circuit, now this transformer is equivalent to resonance reactor.Whole resonant tank is the approximate appearance sense antiresonant circuit jointly formed by the inductance value of transformer high-voltage winding and capacitive divider, test specimen cable electric capacity over the ground, utilizes the characteristic of antiresonant circuit to complete the demand of tested cable AC voltage withstand test.
Use of the present invention is as Fig. 2, shown in 3, experiment power supply is provided by three-phase alternating-current supply, three-phase alternating-current supply is connected by power lead with variable-frequency power sources, the experiment power supply that three-phase alternating-current supply provides by variable-frequency power sources is converted to the single phase poaer supply of optional frequency in 40-200Hz, the low-pressure side of the two spiral single transformer of oil immersed type is supplied to by connecting wire, from the high-pressure side of transformer counter go out trial voltage be supplied to voltage divider and tested device (as cable), then changed by transformer core air gap and regulate the reactance of high pressure winding side and jointly shunt-resonant circuit is formed to the ground capacitance of voltage-dividing capacitor and tested device, complete the AC voltage withstand test of tested device.
Three-phase alternating-current supply is the power supply of 380V, 50Hz.
Variable-frequency power sources is made up of resistance, triode etc., and the three-phase alternating-current supply of 50Hz can be converted to the single phase poaer supply of optional frequency in 40-200Hz, usual voltage output range is 0-350V, and continuous working test is not less than 60min.
The two spiral single transformer of oil immersed type is the single transformer of the two spiral of oil immersed type, rated input power is 50kVA, low-pressure side nominal input voltage is 0-350V, input current is 142.8A, high-pressure side rated output voltage is 120kV, and output current is 18A, and inductance value is that 26-542 is prosperous, high-pressure side rated current 18A, frequency of utilization is 40-200Hz.
Capacitive divider rated voltage is 200kV, electric capacity 1000pF(high-pressure side), stream time is not less than 15 minutes, and no-load voltage ratio is 1000 times.
Claims (3)
1. a high capacitance equipment Withstand test device, is characterized in that it has the two spiral single transformers of the oil immersed type of air gap and the capacitive divider in parallel with it to form by iron circuit.
2. high capacitance equipment Withstand test device according to claim 1, is characterized in that the two spiral single transformer of described oil immersed type is connected with three-phase alternating-current supply by frequency changing power device.
3. high capacitance equipment Withstand test device according to claim 1, is characterized in that described capacitive divider is in parallel with tested device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209294.3A CN104793116A (en) | 2015-04-29 | 2015-04-29 | Voltage withstand test device for large-capacity equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510209294.3A CN104793116A (en) | 2015-04-29 | 2015-04-29 | Voltage withstand test device for large-capacity equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104793116A true CN104793116A (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510209294.3A Pending CN104793116A (en) | 2015-04-29 | 2015-04-29 | Voltage withstand test device for large-capacity equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN108152643A (en) * | 2017-11-24 | 2018-06-12 | 国网北京市电力公司 | Test equipment |
| CN111610419A (en) * | 2020-06-02 | 2020-09-01 | 西安热工研究院有限公司 | Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179001A (en) * | 1994-12-27 | 1996-07-12 | Showa Electric Wire & Cable Co Ltd | Withstand voltage test system for power cable line |
| CN202471899U (en) * | 2012-03-15 | 2012-10-03 | 辽宁省电力有限公司大连供电公司 | Integral alternating-current withstand voltage test device |
| CN202758041U (en) * | 2012-08-12 | 2013-02-27 | 湖北仪天成电力设备有限公司 | Intelligent cable voltage withstand system |
| CN204556779U (en) * | 2015-04-29 | 2015-08-12 | 国网辽宁省电力有限公司大连供电公司 | High capacitance equipment Withstand test device |
-
2015
- 2015-04-29 CN CN201510209294.3A patent/CN104793116A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08179001A (en) * | 1994-12-27 | 1996-07-12 | Showa Electric Wire & Cable Co Ltd | Withstand voltage test system for power cable line |
| CN202471899U (en) * | 2012-03-15 | 2012-10-03 | 辽宁省电力有限公司大连供电公司 | Integral alternating-current withstand voltage test device |
| CN202758041U (en) * | 2012-08-12 | 2013-02-27 | 湖北仪天成电力设备有限公司 | Intelligent cable voltage withstand system |
| CN204556779U (en) * | 2015-04-29 | 2015-08-12 | 国网辽宁省电力有限公司大连供电公司 | High capacitance equipment Withstand test device |
Non-Patent Citations (3)
| Title |
|---|
| 朱匡宇等: "中压橡塑绝缘电力电缆现场交流耐压试验", 《华东电力》 * |
| 王仁义等: "工频谐振变压器在300MW发电机交、直流耐压试验中应用初探", 《山西电力技术》 * |
| 程耀中等: "高压试验用谐振变压器的原理与结构", 《电源技术应用》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105425120A (en) * | 2015-11-12 | 2016-03-23 | 国网辽宁省电力有限公司盘锦供电公司 | GIS same frequency and phase AC voltage withstand test system |
| CN108152643A (en) * | 2017-11-24 | 2018-06-12 | 国网北京市电力公司 | Test equipment |
| CN111610419A (en) * | 2020-06-02 | 2020-09-01 | 西安热工研究院有限公司 | Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor |
| CN111610419B (en) * | 2020-06-02 | 2022-08-02 | 西安热工研究院有限公司 | Method for carrying out long-distance submarine cable voltage withstand test by utilizing reactive compensation reactor |
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Application publication date: 20150722 |