CN106353660A - Series resonance device - Google Patents
Series resonance device Download PDFInfo
- Publication number
- CN106353660A CN106353660A CN201610792673.4A CN201610792673A CN106353660A CN 106353660 A CN106353660 A CN 106353660A CN 201610792673 A CN201610792673 A CN 201610792673A CN 106353660 A CN106353660 A CN 106353660A
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- China
- Prior art keywords
- voltage
- series
- power supply
- low
- arm
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Classifications
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a series resonance device and relates to the technical field of mineral electric equipment. The series resonance device comprises a power supply, wherein the power supply is connected with a frequency conversion controller, and the frequency conversion controller is externally connected with a loop; the loop comprises an exciting transformer, and the exciting transformer is connected in series with a resistor and then connected in series with a high-voltage arm and a low-voltage arm of a voltage divider; a test object is connected in parallel to the voltage divider comprising the high-voltage arm and the low-voltage arm; a voltmeter is connected in parallel to the low-voltage arm. The invention provides the series resonance device capable of effectively performing an electrical test.
Description
Technical field
The present invention relates to mine power equipment technical field, especially relate to a kind of series resonant equipment.
Background technology
Development with electric utility and the progress of science and technology, people propose more to the reliability of power supply, safety
High requirement.In recent years, the production scale of many enterprises is increasing, and electrical equipment puts into and progressively increases, original electric power electricity
Cable and small capacity transformer can not meet the current needs producing, therefore large-sized cable, transformator and other advanced use
Electric equipment factory, ore deposit occur more and more many.
With the completion of 11 Wan Fu electric substations, existing ac voltage withstanding testing equipment and test method can not meet currently
The needs of enterprise.Can ac voltage withstanding test not only continue to run with decisive meaning to judging power equipment, is also guarantor
Demonstrate,prove apparatus insulated level, avoid the important means of insulation fault.Conventional ac voltage withstanding test method often tests electricity
Pressure reaches and require that, test current can not meet requirement again, and test transform capacity requires very big, testing equipment heaviness,
Inconvenience carrying, brings difficulty to field test.And series resonance test method just can be obtained with the testing transformer compared with low capacity
To higher test voltage, solve test transform capacity in general ac voltage withstanding test and can not meet test requirements document
Problem.Further, since test loop is in resonant condition, loop has good filter action in itself, in power supply wave shape
Harmonic component greatly reduces at equipment two ends, thus exporting good sinusoidal wave form.When test product discharges or punctures, that is, in loop
Equivalent capacitance is shorted, and condition of resonance is destroyed, and voltage is decreased obviously, and recovers voltage and rises slowly, will not on tested device
There is transient overvoltage, and the short circuit current of power supply supply is reduced because limiting by reactance, thus limiting tested device
Damaged condition.Therefore, modified test method, perfect, lifting test equipment has to the safe operation of guarantee equipment or even system
Highly important meaning.
Content of the invention
The technical problem to be solved there is provided a kind of series resonant equipment effectively carrying out electrical test.
For achieving the above object, the present invention provides a kind of following technical scheme: series resonant equipment, including power supply, institute
State power supply and connect frequency-variable controller, the external loop of described frequency-variable controller；Described loop includes exciting transformer, described excitation transformation
The high-voltage arm of series voltage divider and low-voltage arm again after device series resistance；In parallel on the potentiometer of described high-voltage arm and low-voltage arm composition
Test product；Shunt voltage meter in described low-voltage arm.
Preferably, described loop arranges high voltage reactor.
Preferably, described high voltage reactor is fixing high voltage reactor, and operating frequency is generally 30～300hz.
Loop in a kind of series resonant equipment of the present invention is all by tested device load capacitance and reactance connected in series
Device and power supply composition, the latter has had both the former effect and effect.This test method utilizes high voltage reactor and capacitor resonance to produce
Raw high voltage and high current.In the entire system, power supply only need in offer system active consumption part, the required power supply of test
Power only has the 1/q of capacity of experiment, and required power supply capacity greatly reduces, and the volume and weight of testing equipment also greatly reduces；?
Series resonance state, when the insulation weak-point of test product is breakdown, circuit takes off humorous immediately, and loop current drops to rapidly normal assays
The 1/q of electric current, therefore the method can efficiently find insulation weak-point, and there is not the hidden of big short circuit current burn trouble point
Suffer from；When test product punctures, because losing condition of resonance, high voltage also disappears immediately, and electric arc extinguishes at once, is not in any extensive
Multiple overvoltage, thus avoid the injury to tested device.
High voltage reactor fixed by series resonant equipment band in the present invention, and operating frequency is generally 30～300hz.This device
Rely on powerful variable-frequency power sources, adjust test frequency, make loop reach resonance, the inductance value of reactor used is non-adjustable
, and test frequency changes with the capacitance difference of test item.
Brief description
Fig. 1 is a kind of circuit diagram of series resonant equipment of the present invention.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, should
Embodiment is only used for explaining the present invention, does not constitute limiting the scope of the present invention.
A kind of series resonant equipment as shown in Figure 1, including power supply vc, described power supply connects frequency-variable controller vf, described change
The external loop of frequency controller vf；Described loop includes exciting transformer t1, connects after described exciting transformer t1 series resistance again
The high-voltage arm c1 of potentiometer and low-voltage arm c2；Test product in parallel on the potentiometer of described high-voltage arm c1 and low-voltage arm c2 composition；Described
Shunt voltage meter in low-voltage arm c2.
Loop in the present invention is all made up of tested device load capacitance and reactor connected in series and power supply, the latter
Have both the former effect and effect, so utilize high voltage reactor l1 and capacitor resonance to produce high voltage and high current.Whole
In individual system, power supply vc only need in offer system active consumption part, the required power of test only has capacity of experiment
1/q, required power supply capacity greatly reduces, and the volume and weight of testing equipment also greatly reduces.In series resonance state, work as test product
Insulation weak-point breakdown when, circuit takes off humorous immediately, and loop current drops to rapidly the 1/q of normal assays electric current, the therefore party
Method can efficiently find insulation weak-point, and there is not the hidden danger of big short circuit current burn trouble point；When test product punctures,
Because losing condition of resonance, high voltage also disappears immediately, and electric arc extinguishes at once, is not in any restoring over-voltage, thus avoiding
Injury to tested device.
High voltage reactor l1 fixed by series resonant equipment band in the present invention, and operating frequency is generally 30～300hz.This dress
Put the powerful variable-frequency power sources of dependence, adjust test frequency, make loop reach resonance, the inductance value of reactor l1 used is can not
Adjust, and test frequency changes with the capacitance difference of test item.
Above-described is only the preferred embodiment of the present invention it is noted that for those of ordinary skill in the art
For, without departing from the concept of the premise of the invention, some deformation can also be made and improve, these broadly fall into the present invention
Protection domain.
Claims (3)
1. a kind of series resonant equipment, including power supply it is characterised in that: described power supply connects frequency-variable controller, described VFC
The external loop of device；Described loop includes exciting transformer, the high pressure of series voltage divider again after described exciting transformer series resistance
Arm and low-voltage arm；Test product in parallel on the potentiometer of described high-voltage arm and low-voltage arm composition；Shunt voltage meter in described low-voltage arm.
2. series resonant equipment according to claim 1 it is characterised in that: on described loop arrange high voltage reactor.
3. series resonant equipment according to claim 2 it is characterised in that: described high voltage reactor is fixing high pressure reactance
Device, operating frequency is generally 30～300hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792673.4A CN106353660A (en) | 2016-08-31 | 2016-08-31 | Series resonance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610792673.4A CN106353660A (en) | 2016-08-31 | 2016-08-31 | Series resonance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106353660A true CN106353660A (en) | 2017-01-25 |
Family
ID=57856398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610792673.4A Withdrawn CN106353660A (en) | 2016-08-31 | 2016-08-31 | Series resonance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106353660A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193822A (en) * | 2018-10-15 | 2019-01-11 | 云南电网有限责任公司临沧供电局 | A kind of power transmission line monitoring device electricity getting device |
| CN110568332A (en) * | 2019-09-23 | 2019-12-13 | 南方电网科学研究院有限责任公司 | lightning arrester resistor sheet side glaze discharge test system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735997A (en) * | 2012-06-19 | 2012-10-17 | 扬州市双宝电力设备有限公司 | Series resonance withstanding voltage tester |
| CN202502205U (en) * | 2012-03-23 | 2012-10-24 | 上海市电力公司 | Variable frequency series resonance withstand voltage test apparatus |
| CN103792471A (en) * | 2012-12-24 | 2014-05-14 | 武改莲 | Series resonance withstanding voltage tester |
| CN206020597U (en) * | 2016-08-31 | 2017-03-15 | 淮北工科检测检验有限公司 | A kind of series resonant equipment |
-
2016
- 2016-08-31 CN CN201610792673.4A patent/CN106353660A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202502205U (en) * | 2012-03-23 | 2012-10-24 | 上海市电力公司 | Variable frequency series resonance withstand voltage test apparatus |
| CN102735997A (en) * | 2012-06-19 | 2012-10-17 | 扬州市双宝电力设备有限公司 | Series resonance withstanding voltage tester |
| CN103792471A (en) * | 2012-12-24 | 2014-05-14 | 武改莲 | Series resonance withstanding voltage tester |
| CN206020597U (en) * | 2016-08-31 | 2017-03-15 | 淮北工科检测检验有限公司 | A kind of series resonant equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193822A (en) * | 2018-10-15 | 2019-01-11 | 云南电网有限责任公司临沧供电局 | A kind of power transmission line monitoring device electricity getting device |
| CN110568332A (en) * | 2019-09-23 | 2019-12-13 | 南方电网科学研究院有限责任公司 | lightning arrester resistor sheet side glaze discharge test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170125 |