CN202153252U - Induction over-voltage-resistance tester based on AC frequency conversion technology - Google Patents
Induction over-voltage-resistance tester based on AC frequency conversion technology Download PDFInfo
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- CN202153252U CN202153252U CN2011202567333U CN201120256733U CN202153252U CN 202153252 U CN202153252 U CN 202153252U CN 2011202567333 U CN2011202567333 U CN 2011202567333U CN 201120256733 U CN201120256733 U CN 201120256733U CN 202153252 U CN202153252 U CN 202153252U
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Abstract
The utility model relates to an induction over-voltage-resistance tester based on the AC frequency conversion technology, comprising a rectification circuit, a filtering voltage stabilizing circuit, and an inversion circuit which are sequentially connected, wherein the rectifier bridge of the rectification circuit adopts the single-phase bridge type rectification, composed of four power diodes; the filtering voltage stabilizing circuit, connected after rectification, comprises an LC filter circuit and an isolation-change filtering unit; the inversion circuit adopts pulse width modulation single-phase full bridge inversion, with the width of the output pulse being 1 to 60 microseconds; the output voltage is linked to a detection system via an isolation transformer, and the port output enters the to-be-tested voltage transformer. The induction over-voltage-resistance tester is easy to control, responds rapidly to the parameter adjustment in a convenient and effective manner, and is capable of more effectively and rapidly adjusting voltage and converting frequency, thereby having wide voltage and range for continuous frequency adjustment.
Description
Technical field
The utility model belongs to the high-voltage testing equipment field, relates to the induced over voltage withstand test appearance, especially a kind of induced over voltage withstand test appearance based on alternating frequency conversion technique.
Background technology
Along with Development of Power Electronic Technology is constantly ripe, alternating frequency conversion technique is widely used in every field, because the improvement of control method, the voltage of variable-frequency power sources output can satisfy the requirement of voltage transformer (VT) induced over voltage withstand test and excitation property test.Before, the voltage transformer (VT) induced over voltage withstand test adopts the frequency tripling generator to carry out usually, and this frequency tripling generator is made up of low saturated mono phase transformer wiring.Three star-like connections in the former limit of single transformer do not have the neutral line and draw; Be connected to three-phase alternating-current supply; Secondary open delta side output voltage frequency is main with 150Hz (accounting for 50%) under the saturated state of single transformer excitation, but contains first-harmonic and higher hamonic wave, and equipment volume is bigger; Weight is big, and price is expensive.
Summary of the invention
The purpose of the utility model is to overcome the weak point of prior art; A kind of induced over voltage withstand test appearance based on alternating frequency conversion technique is provided; This induced over voltage withstand test appearance adopts alternating frequency conversion technique, and voltage transformer (VT) is carried out induced over voltage withstand test and excitation property test.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of induced over voltage withstand test appearance based on alternating frequency conversion technique; It is characterized in that: connect and compose successively by rectification circuit, filter regulator circuit, inverter circuit, isolating transformer; What wherein the rectifier bridge of rectification circuit adopted is single-phase bridge rectification, is made up of four electric power diodes; The filter regulator circuit that is connected after the rectification becomes filter unit two parts by LC filtering circuit and isolation and forms; Inverter circuit adopts the inversion of width modulation single-phase full bridge; Output pulse width is at 1-60 μ s; Output voltage is through the isolating transformer access detection system of boosting, and port output gets into by the examination voltage transformer (VT).
And; The IGBT1 of said formation inverter circuit, the trigger pip of IGBT4 are identical; Output directly inserts these two grids, simultaneously the trigger pip of IGBT2, IGBT3 and IGBT1, the time in IGBT4 signal phase difference of half cycle, inserts grid behind the time delays through the adding half period.
The advantage and the good effect of the utility model are:
1, this test instrument is reasonable in design, and collection induced over voltage withstand test and excitation property test function and one adopt the single phase alternating current power supply input of handled easily, realizes accurate, the wide region output of voltage, frequency.
2, this test instrument replaces the induced over voltage withstand test appearance of electromagnetic induction principle with the obvious advantage with alternating frequency conversion technique; Also have cost low, in light weight, be easy to control, advantage such as energy-conservation; The work of having saved is prepared and the running time; Be more suitable for using in the work on the spot, improved work efficiency, alleviated personnel's labour intensity.
3, this test instrument is easy to control; Parameter adjustment is convenient efficient; To the parameter adjustment response rapidly, the pressure regulation frequency conversion of high in efficiency and convenience ground has very wide voltage, the continuous range of adjustment of frequency more; Compare with the frequency tripling generator of electromagnetic induction principle have simple to operate, output signal accurately and reliably, in light weight, characteristics that cost is low, can be energy-conservation more than 30%.
Description of drawings
Fig. 1 is the electrical block diagram of the utility model;
Fig. 2 is the profile synoptic diagram of the utility model;
Fig. 3 is the operation interface figure of the utility model.
Embodiment
Below in conjunction with accompanying drawing, through specific embodiment the utility model is done further to detail, following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.
A kind of induced over voltage withstand test appearance based on alternating frequency conversion technique; As shown in Figure 1; Adopt the ac-dc-ac inverter circuit; Connected and composed successively by rectification circuit, filter regulator circuit, inverter circuit, isolating transformer, what wherein the rectifier bridge of rectification circuit adopted is single-phase bridge rectification, is made up of four electric power diodes; The filter regulator circuit that is connected after the rectification becomes filter unit two parts by LC filtering circuit and isolation to be formed, and the capacitor and inductor that LC filtering circuit coupling is fit to plays the effect of filtering and voltage stabilizing.Grid alternating current is through overcommutation and after filtering voltage regulation on the LC filtering circuit; Get into follow-up inverter circuit, inverter circuit adopts the inversion of width modulation single-phase full bridge, and output pulse width changes in 1-60 μ s; Because the trigger pip of IGBT1, IGBT4 is identical; So output directly inserts these two IGBT grids, simultaneously the trigger pip of IGBT2, IGBT3 just and IGBT1, the time in IGBT4 signal phase difference of half cycle, so insert grid behind the time delays through the adding half period.Output voltage is through the isolating transformer access detection system of boosting, and port output gets into by the examination voltage transformer (VT).
In theory, the single-phase bridge type inverter of SPWM control can produce the sinusoidal voltage of standard, but actual instantaneous output voltage might not be the sine wave of standard, and just its mean value in a sampling period is standard sine wave.Isolating transformer is the load of resistance sense property, and load itself can be played the effect of filtering, so output terminal is generally set up filtering circuit no longer separately.
Control method has not only determined the quality of output voltage waveforms, also plays crucial effects to reducing the system switching loss with the raising system effectiveness.The pulse width modulation mode of inversion link is very important concerning power source performance, and native system adopts SPWM, through the optimized choice of switching time, and the switching time of control PWM ripple.
Detecting unit adopts FEEDBACK CONTROL, promptly reduces the error of output voltage and reference voltage with error amplifier.According to control mode and testing requirements, need detect output voltage, electric current, frequency and power.The electric quantity test unit class of accuracy that detecting unit adopts reaches 0.5 grade.
Induced over voltage withstand test appearance based on alternating frequency conversion technique is as shown in Figure 2, adopts split-type design, is convenient for carrying.
Induced over voltage withstand test appearance based on alternating frequency conversion technique is as shown in Figure 3, its guidance panel easy operating.
By common single phase poaer supply input circuit,, and offer the inversion part behind the process filtering voltage regulation through Power Diode Pumped rectifier bridge output DC.The single-phase full bridge inversion that the inversion part is made up of IGBT, wherein the conducting of IGBT control is accomplished by control Driver Circuit, and operation interface is friendly.To the inversion process, used SPWM technology, obtain the SPWM voltage waveform, and realized the adjustable of voltage magnitude, frequency.Output voltage is through the isolating transformer access detection system of boosting, and port output gets into by the examination voltage transformer (VT).
The test instrument design power is 2kW, input voltage: single-phase 220V, and output voltage range: 0 to 380V is adjustable continuously, step-length voltage regulating: 0.1V, the frequency conversion scope: 30 to 300Hz, frequency conversion step-length: 0.1Hz, measuring accuracy: 0.5 grade.
The performance comparison sheet of this induced over voltage withstand test appearance and frequency tripling generator is provided below
Claims (2)
1. induced over voltage withstand test appearance based on alternating frequency conversion technique; It is characterized in that: connect and compose successively by rectification circuit, filter regulator circuit, inverter circuit, isolating transformer; What wherein the rectifier bridge of rectification circuit adopted is single-phase bridge rectification, is made up of four electric power diodes; The filter regulator circuit that is connected after the rectification becomes filter unit two parts by LC filtering circuit and isolation and forms; Inverter circuit adopts the inversion of width modulation single-phase full bridge; Output pulse width is at 1-60 μ s; Output voltage is through the isolating transformer access detection system of boosting, and port output gets into by the examination voltage transformer (VT).
2. the induced over voltage withstand test appearance based on alternating frequency conversion technique according to claim 1; It is characterized in that: the IGBT1 of said formation inverter circuit, the trigger pip of IGBT4 are identical; Output directly inserts these two grids; Simultaneously the trigger pip of IGBT2, IGBT3 and IGBT1, the time in IGBT4 signal phase difference of half cycle, insert grid behind the time delays through the adding half period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202567333U CN202153252U (en) | 2011-07-20 | 2011-07-20 | Induction over-voltage-resistance tester based on AC frequency conversion technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202567333U CN202153252U (en) | 2011-07-20 | 2011-07-20 | Induction over-voltage-resistance tester based on AC frequency conversion technology |
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| CN202153252U true CN202153252U (en) | 2012-02-29 |
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| CN2011202567333U Expired - Fee Related CN202153252U (en) | 2011-07-20 | 2011-07-20 | Induction over-voltage-resistance tester based on AC frequency conversion technology |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182220A (en) * | 2015-09-15 | 2015-12-23 | 安徽佑赛科技有限公司 | Three phase full bridge inverter power circuit test system and method |
| CN106443378A (en) * | 2016-09-21 | 2017-02-22 | 深圳供电局有限公司 | AC/DC voltage withstand device of distribution network equipment |
| CN108761288A (en) * | 2018-05-30 | 2018-11-06 | 南宁市高照电器有限责任公司 | A kind of low pressure withstand-voltage test bench and its test method |
| CN109375077A (en) * | 2018-11-28 | 2019-02-22 | 国网河南省电力公司南阳供电公司 | A kind of insulation of electrical installation parameter quick test device and method |
| CN114244143A (en) * | 2021-12-16 | 2022-03-25 | 广东电网有限责任公司 | Intelligent pressure regulating system and pressure regulating control method for test platform |
-
2011
- 2011-07-20 CN CN2011202567333U patent/CN202153252U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182220A (en) * | 2015-09-15 | 2015-12-23 | 安徽佑赛科技有限公司 | Three phase full bridge inverter power circuit test system and method |
| CN106443378A (en) * | 2016-09-21 | 2017-02-22 | 深圳供电局有限公司 | AC/DC voltage withstand device of distribution network equipment |
| CN106443378B (en) * | 2016-09-21 | 2023-04-07 | 深圳供电局有限公司 | AC/DC voltage withstand device of distribution network equipment |
| CN108761288A (en) * | 2018-05-30 | 2018-11-06 | 南宁市高照电器有限责任公司 | A kind of low pressure withstand-voltage test bench and its test method |
| CN108761288B (en) * | 2018-05-30 | 2023-10-27 | 南宁市高照电器有限责任公司 | Low-voltage withstand voltage test board and test method thereof |
| CN109375077A (en) * | 2018-11-28 | 2019-02-22 | 国网河南省电力公司南阳供电公司 | A kind of insulation of electrical installation parameter quick test device and method |
| CN109375077B (en) * | 2018-11-28 | 2024-04-05 | 国网河南省电力公司南阳供电公司 | Quick test device and method for insulation parameters of electrical equipment |
| CN114244143A (en) * | 2021-12-16 | 2022-03-25 | 广东电网有限责任公司 | Intelligent pressure regulating system and pressure regulating control method for test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: TIANJIN ELECTRIC POWER CORP. Effective date: 20130521 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300010 HEBEI, TIANJIN TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20130521 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Tianjin Electric Power Corp. Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee before: Tianjin Electric Power Corp. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120229 Termination date: 20190720 |
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| CF01 | Termination of patent right due to non-payment of annual fee |