CN201247305Y - Device for generating oscillating wave for electrical equipment experiment - Google Patents
Device for generating oscillating wave for electrical equipment experiment Download PDFInfo
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- CN201247305Y CN201247305Y CNU2008201849237U CN200820184923U CN201247305Y CN 201247305 Y CN201247305 Y CN 201247305Y CN U2008201849237 U CNU2008201849237 U CN U2008201849237U CN 200820184923 U CN200820184923 U CN 200820184923U CN 201247305 Y CN201247305 Y CN 201247305Y
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- power supply
- switch
- electronic switch
- voltage
- oscillating wave
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- 238000012360 testing method Methods 0.000 claims abstract description 25
- 239000003990 capacitor Substances 0.000 claims abstract description 22
- 230000010355 oscillation Effects 0.000 claims description 14
- 239000004065 semiconductor Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000005284 excitation Effects 0.000 abstract description 12
- 230000003534 oscillatory effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000002459 sustained effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model relates to an oscillatory wave generating device which is used to test an electrical apparatus, which comprises a power supply AC, a switch K1, a capacitor C and an electric inductance L, wherein the power supply AC, the capacitor C and the electric inductance L are connected in series to be a loop before the switch K1 is closed, and the switch K1, the capacitor C and the electric inductance L form an LC attenuation oscillating circuit after the switch K1 is closed, wherein the internal resistance of the power supply is R, and the internal resistance of the electric inductance is R0. The utility model is characterized in that the power supply AC in the oscillatory wave generating device adopts a frequency-modulation pressure-regulating power supply, and the switch K1 is an electronic switch. The utility model has the advantages that an alternating current power supply with lower voltage is adopted to excite, an LC series loop is led to be on resonance to obtain resonant high voltage, the size of voltage of the resonant high voltage is Q times more than alternating current excitation voltage from an electric engineering principle, and Q is a quality factor of an LC series resonant vibration loop. Since the voltage of an alternating current exciting power supply is lower, the working voltage of the electronic switch is further lower.
Description
Technical field
The utility model relates to a kind of based on ac-excited apparatus for generating oscillating wave, especially a kind of electric equipment test apparatus for generating oscillating wave that is used for.
Background technology
It is the basic detection method of measurement insulation of electrical installation performance that electrical equipment is carried out sinusoidal wave withstand voltage and partial discharge quantity measurements, generalized case adopts testing transformer directly to pressurize, but when the very big trial voltage with it of test specimen equivalent electric capacity is very high, then the capacity of testing transformer can be very big, causes the scene can't finish test.Adopt the wave of oscillation that electrical equipment is carried out the withstand voltage and partial discharge test of sine wave in recent years both at home and abroad, can reduce the capacity of testing equipment.
At present, the wave of oscillation that is used to detect is to adopt the mode of continuous-current excitation to produce, and is example with the capacitive electrical equipment, its ultimate principle as shown in Figure 1: the internal resistance R that mainly comprises dc charging power supply BT, current-limiting resistance R, inductance L, inductance L
0, tested electrical equipment equivalent capacity C and electronic switch K.Before the electronic switch K closure, to equivalent capacity C charging, when C was charged to scheduled voltage, electronic switch K rapid closing was because there is internal resistance R in inductance L to dc charging power supply BT by current-limiting resistance R, L
0, producing a wave of oscillation f (t) of decay gradually in the series loop of L, C, this wave of oscillation directly is added on the equivalent capacity C of electrical equipment, just can realize the tested electric sinusoidal wave withstand voltage test and the measurement of partial discharge quantity.
Adopt the mode of continuous-current excitation to obtain the wave of oscillation and mainly have following problem: the peak-peak of first wave of oscillation f (t) equals the magnitude of voltage of dc charging power supply BT, and when the voltage of wave of oscillation f (t) was very high, it is corresponding very high that the voltage of dc charging power supply BT is also wanted.The operating voltage that second its switch K bears is the voltage of dc charging power supply BT.
Based on the problem of above-mentioned existence, adopt the mode of continuous-current excitation to obtain the wave of oscillation, because cost and technology can only be accomplished the apparatus for generating oscillating wave that 200kV is following at present.Be used for the continuous-current excitation apparatus for generating oscillating wave that Partial Discharge Detection is used as the German SEBAKMT OWTS HV150 of company type, its trial voltage also can only be accomplished 150kV, and is up to 6,000,000 Renminbi, very expensive in the Chinese market sale price.
How the apparatus for generating oscillating wave that also is not higher than both at home and abroad 200kV even 1000kV so far along with the raising of line voltage grade, improves the voltage that is used for the apparatus for generating oscillating wave that electric equipment test uses, and is the problem that electric power detection department presses for solution.
Summary of the invention
The purpose of this utility model is: at being used for the problems referred to above that electric equipment test exists with apparatus for generating oscillating wave at present, a kind of new ac-excited apparatus for generating oscillating wave is provided, it adopts lower ac-excited power supply and the electronic switch of voltage, just can produce the high voltage wave of oscillation.
The purpose of this utility model is achieved in that a kind of electric equipment test apparatus for generating oscillating wave that is used for, forms by power supply, switch, capacitor C and inductance L, and before the switch closure, be a series connection loop by power supply, capacitor C and inductance L; Form LC damped oscillation loop by switch, capacitor C and inductance L behind the switch closure, it is characterized in that: the power supply in this device adopts the frequency modulation and voltage modulation power supply, and switch is an electronic switch.
In the utility model: described series loop is made up of the equivalent capacity C of inductance L and tested electrical equipment.
In the utility model: described series loop is made up of the equivalent inductance L of capacitor C and tested electrical equipment.
In the utility model: described frequency modulation and voltage modulation power supply is: the bridge inverter main circuit of being made up of IGBT, to be connected with the current supply circuit of bridge inverter main circuit behind the commercial power rectification, be parallel with fly-wheel diode on each IGBT, the driver element circuit of IGBT is controlled by single-chip microprocessor MCU.
In the utility model: be provided with isolating transformer T between frequency modulation and voltage modulation power supply and the LC series resonant tank.
In the utility model: in the frequency modulation and voltage modulation power supply, behind the commercial power rectification through electronic switch K
2Be connected with the current supply circuit of frequency modulation and voltage modulation power supply.
In the utility model: the primary side of isolating transformer or primary side are provided with electronic switch K
1
In the utility model: described electronic switch is the vacuum types switch, or the semiconductor solid-state switch.
In the utility model: described electronic switch is made up of IGBT, is parallel with fly-wheel diode on the IGBT, and the driving of electronic switch is subjected to the control of single-chip microprocessor MCU.
In the utility model: described electronic switch K
1Be to compose in parallel by two one-way SCRs, two controllable silicon reverse parallel connections, the trigger pip of electronic switch is controlled by single-chip microprocessor MCU.
Advantage of the present utility model is: adopt the lower ac-excited power supply of voltage, resonance by the LC series loop obtains the resonance high voltage, known that by the electrotechnics principle the high-tension voltage swing of resonance is Q a times of ac-excited voltage, Q is the quality factor of LC series resonant tank.Because ac-excited power source voltage is lower, so the operating voltage of switch also can be lower.
Description of drawings
Fig. 1 is the ultimate principle figure of the continuous-current excitation apparatus for generating oscillating wave used of existing electric equipment test;
Fig. 2 is ultimate principle figure of the present utility model;
Fig. 3 is a kind of application mode schematic diagram of the present utility model;
Fig. 4 is an another kind of application mode schematic diagram of the present utility model;
Fig. 5 is a specific embodiment of Fig. 4 application mode;
Fig. 6 is another specific embodiment of Fig. 4 application mode;
Fig. 7 is a specific embodiment of Fig. 3 application mode;
Fig. 8 is another specific embodiment of Fig. 3 application mode;
Fig. 9 is that the utility model is used for the concrete application that electrical equipment is done local discharge capacity measurement.
Embodiment
Accompanying drawing discloses the embodiment of ultimate principle figure of the present utility model and specific embodiment thereof without limitation, below in conjunction with embodiment the utility model is further described.
As seen from Figure 2, present embodiment is to be the tested product with the capacitive electrical equipment, and its ultimate principle is: work as K
1During open circuit, the series loop of constituting for the equivalent capacity C of inductance L and tested electrical equipment by ac-excited power supply AC, the ac-excited voltage that voltage is lower is provided, when the resonance frequency of the output frequency of excitation power supply AC and inductance L and capacitor C is identical, inductance L and capacitor C loop resonance produce the resonance high voltage, regulate the output voltage of excitation power supply AC, make the resonance potential on the equivalent capacity C of tested electrical equipment reach predetermined value, with electronic switch K
1Short circuit is because there is internal resistance R in inductance L
0, on capacitor C, produced damp oscillatory wave f (t).
As seen from Figure 3, in a kind of mode of practical application be, between the series resonant circuit that ac-excited power supply AC and capacitor C inductance L form, be provided with isolating transformer T the principle of Fig. 2, and at isolating transformer T secondary lateral parallel electronic switch K
1The output of excitation power supply AC is by isolating transformer T, make capacitor C inductance L loop resonance, regulate the output amplitude of excitation power supply AC, make the voltage on the capacitor C reach predetermined value, electronic switch K1 short circuit, the secondary short circuited that is equivalent to transformer just can obtain a damp oscillatory wave f (t) on tested electrical equipment C.
As seen from Figure 4, with the principle of Fig. 2 in the another kind of mode of practical application be, be provided with isolating transformer T between excitation power supply AC and capacitor C inductance L loop circuit, the difference of it and Fig. 3 only is: with electronic switch K
1Be connected in parallel on isolating transformer T primary side.Excitation power supply AC is by isolating transformer T, and with inductance L and capacitor C loop resonance, the resonance potential on the capacitor C reaches predetermined value, and electronic switch K1 closure just can obtain a damp oscillatory wave f (t) on tested electrical equipment C.
Fig. 5 is the electrical schematic diagram of a physical circuit of Fig. 4 application mode, and present embodiment is to be the tested product with perceptual electrical equipment, and wherein, frequency modulation and voltage modulation power supply AC comprises: commutation diode D
1～6Meet filter capacitor C after the three-phase bridge rectification circuit of forming, the rectification
1, Q
1～4Inverter bridge is made up of IGBT, four IGBT sustained diode Q respectively in parallel
1～4, the driver element circuit DR of IGBT
1～2Control by single-chip microprocessor MCU; At the primary side of isolating transformer T electronic switch K in parallel
1, K
1Q
5～6Form IGBT sustained diode respectively in parallel by two IGBT
5～6, its driver element circuit DR
3Driver element circuit DR with the IGBT inverter bridge
1～2Control by single-chip microprocessor MCU; The primary side of isolating transformer T is connected with tested electric equivalent inductance L series loop with C.
In the present embodiment: the driver element circuit DR of IGBT inverter bridge circuit
18 be controlled by 1 of MCU, DR
28 be controlled by 4 of MCU; Q
1Be controlled by DR
16, Q
2Be controlled by DR
11, Q
3Be controlled by DR
26, Q
4Be controlled by DR
21.At electronic switch K
1In, driver element circuit DR
38 be controlled by 6 of MCU, Q
5Be controlled by DR
36, Q
6Be controlled by DR
31.
Fig. 6 is the electrical schematic diagram of another physical circuit of Fig. 4 application mode, and present embodiment is to be the tested product with the capacitive electrical equipment, and it only is with the difference of Fig. 5: be connected in series an electronic switch K between the current supply circuit of rectification circuit and IGBT inverter bridge
2, K
2Q
7Adopt IGBT, Q
7Last sustained diode Q in parallel
7, Q
7Driving circuit DR
4By single-chip microprocessor MCU control, electronic switch K
2In order to prevent the setting of inverter bridge short circuit three-phase bridge rectification circuit.Cancelled electronic switch K in the primary side of isolating transformer T
1, the short circuit of isolating transformer T primary side is that the whole conducting short circuits of four IGBT by inverter bridge realize.
In the present embodiment: the driver element circuit DR of inverter bridge
18 be controlled by 3 of MCU, DR
28 be controlled by 5 of MCU; Q
1Be controlled by DR
11, Q
2Be controlled by DR
16, Q
3Be controlled by DR
21, Q4 is controlled by DR
26.At electronic switch switch K
2In, driver element circuit DR
44 be controlled by 1 of MCU, Q
7Be controlled by DR
41.
Fig. 7 is the electrical schematic diagram of a physical circuit of Fig. 3 application mode, present embodiment is to be the tested product with perceptual electrical equipment, the difference of it and Fig. 5 is: electronic switch K1 is positioned at the primary side of isolating transformer T, the series loop that the secondary connection of T is made up of the equivalent inductance L of capacitor C and tested electrical equipment.
In the present embodiment: 8 of the driver element circuit DR1 of inverter bridge is controlled by 1 of MCU, DR
28 be controlled by 3 of MCU; Q
1Be controlled by DR
11, Q
2Be controlled by DR
16, Q
3Be controlled by DR
21, Q
4Be controlled by DR
26.At electronic switch K
1In, driver element circuit DR
38 be controlled by 5 of MCU, Q
5Be controlled by 6 of DR3, Q
6Be controlled by DR
31.
Fig. 8 is the electrical schematic diagram of another physical circuit of Fig. 3 application mode, present embodiment is to be the tested product with the capacitive electrical equipment, and the difference of it and Fig. 7 only is: string has electronic switch K between the current supply circuit of the rectification output of three-phase bridge rectification circuit and inverter bridge
2, K
2Q
7Adopt IGB, the last sustained diode Q in parallel of IGBT
7, Q
7Driver element circuit DR
4Control by single-chip microprocessor MCU.
In the present embodiment: in the inverter bridge circuit, driver element circuit DR
18 be controlled by 3 of MCU, DR
28 be controlled by 5 of MCU; Q1 is controlled by DR
16, Q
2Be controlled by DR
11, Q
3Be controlled by DR
26, Q
4Be controlled by DR
21.At electronic switch K
1In, driver element circuit DR
38 be controlled by 7 of MCU, Q
5Be controlled by DR
36, Q
6Be controlled by DR
31; At electronic switch switch K
2In, driver element circuit DR
44 be controlled by 1 of MCU, Q
7Be controlled by DR
41.
Fig. 9 is to be example with Fig. 8 embodiment, electrical equipment is made the application synoptic diagram that local discharge capacity is measured, as seen from the figure, in the use, local discharge signal coupling sensor CG is connected in the loop of tested electrical equipment C, the local discharge signal of CG output is given the input port 1 of measurement of partial discharge instrument PD, the port 2 of PD is the synchronizing signal input, it is controlled by 9 ends of single-chip microprocessor MCU, the short circuit trigger pip of it and MCU port 7 is synchronous, this signal controlling shelf depreciation instrument is when the wave of oscillation begins, gather and the record local discharge signal, the amplitude of 3～10 wave of oscillation voltages meets the technical manual of measurement of partial discharge as long as equipment under test C goes forward, to gathering and the record local discharge signal, by the non real-time analysis of computing machine, just can calculate the size of the partial discharge quantity of this electrical equipment C, so as to weighing the state of insulation of judging this electrical equipment to acquired signal.
The device that can utilize the utility model to relate to carries out sinusoidal wave electrical equipment withstand voltage and that partial discharge quantity is measured and comprises power cable, gas-insulated combined electric GIS, power transformer and generator etc.; Apparatus of the present invention can produce the wave of oscillation of 1kV～5000kV; It will have a very wide range of applications in the sinusoidal wave withstand voltage and partial discharge quantity measurement of high voltage installation.
During concrete enforcement, described electronic switch can adopt the vacuum types switch, or the semiconductor solid-state switch.
Claims (10)
1, a kind of electric equipment test apparatus for generating oscillating wave that is used for is made up of power supply, switch, capacitor C and inductance L, before the switch closure, is a series connection loop by power supply, capacitor C and inductance L; Form LC damped oscillation loop by switch, capacitor C and inductance L behind the switch closure, it is characterized in that: the power supply in this device adopts the frequency modulation and voltage modulation power supply, and switch is an electronic switch.
2, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 1, it is characterized in that: described series loop is made up of the equivalent capacity C of inductance L and tested electrical equipment.
3, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 1, it is characterized in that: described series loop is made up of the equivalent inductance L of capacitor C and tested electrical equipment.
4, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 1, it is characterized in that: described frequency modulation and voltage modulation power supply is: the bridge inverter main circuit of being made up of IGBT, the current supply circuit of bridge inverter main circuit will be connect behind the commercial power rectification, be parallel with fly-wheel diode on each IGBT, the driver element circuit of IGBT is controlled by single-chip microprocessor MCU.
5, according to the described electric equipment test apparatus for generating oscillating wave that is used for of one of claim 2～4, it is characterized in that: be provided with isolating transformer T between frequency modulation and voltage modulation power supply and the LC series resonant tank.
6, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 5 is characterized in that: in the frequency modulation and voltage modulation power supply, behind the commercial power rectification through electronic switch K
2Be connected with the current supply circuit of the bridge inverter main circuit of frequency modulation and voltage modulation power supply.
7, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 4, it is characterized in that: the primary side of isolating transformer or primary side are provided with electronic switch K
1
8, according to the described electric equipment test apparatus for generating oscillating wave that is used for of one of claim 6～7, it is characterized in that: described electronic switch is the vacuum types switch, or the semiconductor solid-state switch.
9, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 8, it is characterized in that: described electronic switch is made up of IGBT, is parallel with fly-wheel diode on the IGBT, and the driving of electronic switch is subjected to the control of single-chip microprocessor MCU.
10, the electric equipment test apparatus for generating oscillating wave that is used for according to claim 8 is characterized in that: described electronic switch K
1Be to compose in parallel by two one-way SCRs, two controllable silicon reverse parallel connections, the trigger pip of electronic switch is controlled by single-chip microprocessor MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201849237U CN201247305Y (en) | 2008-09-02 | 2008-09-02 | Device for generating oscillating wave for electrical equipment experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201849237U CN201247305Y (en) | 2008-09-02 | 2008-09-02 | Device for generating oscillating wave for electrical equipment experiment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201247305Y true CN201247305Y (en) | 2009-05-27 |
Family
ID=40731125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201849237U Expired - Fee Related CN201247305Y (en) | 2008-09-02 | 2008-09-02 | Device for generating oscillating wave for electrical equipment experiment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201247305Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323752A (en) * | 2013-06-05 | 2013-09-25 | 广东电网公司电力科学研究院 | Dry type air reactor turn-to-turn insulation defect detection system |
| CN103439637A (en) * | 2013-08-14 | 2013-12-11 | 西安建筑科技大学 | Device and method for oscillatory wave generation in electrical device partial discharge test |
| CN103595290A (en) * | 2013-10-25 | 2014-02-19 | 西安交通大学 | Modularized electronic switch used for high-pressure oscillatory wave generator |
| EP3252485A1 (en) * | 2016-06-02 | 2017-12-06 | Hagenuk KMT Kabelmesstechnik GmbH | High voltage switching assembly for testing and diagnosing of resources used for electrical energy engineering |
| CN108427062A (en) * | 2017-02-14 | 2018-08-21 | 丁晓东 | Using the frequency conversion resonance vibration pressure-proof local discharge test device and method of intermittent drive |
-
2008
- 2008-09-02 CN CNU2008201849237U patent/CN201247305Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323752A (en) * | 2013-06-05 | 2013-09-25 | 广东电网公司电力科学研究院 | Dry type air reactor turn-to-turn insulation defect detection system |
| CN103323752B (en) * | 2013-06-05 | 2016-03-02 | 广东电网公司电力科学研究院 | A kind of detection system of inter-turn insulation defect of dry hollow reactor |
| CN103439637A (en) * | 2013-08-14 | 2013-12-11 | 西安建筑科技大学 | Device and method for oscillatory wave generation in electrical device partial discharge test |
| CN103439637B (en) * | 2013-08-14 | 2016-03-02 | 西安建筑科技大学 | A kind of wave of oscillation production method for local discharge of electrical equipment test |
| CN103595290A (en) * | 2013-10-25 | 2014-02-19 | 西安交通大学 | Modularized electronic switch used for high-pressure oscillatory wave generator |
| CN103595290B (en) * | 2013-10-25 | 2016-01-20 | 西安交通大学 | A kind of high-voltage oscillation wave producer modular electronic switch |
| EP3252485A1 (en) * | 2016-06-02 | 2017-12-06 | Hagenuk KMT Kabelmesstechnik GmbH | High voltage switching assembly for testing and diagnosing of resources used for electrical energy engineering |
| CN108427062A (en) * | 2017-02-14 | 2018-08-21 | 丁晓东 | Using the frequency conversion resonance vibration pressure-proof local discharge test device and method of intermittent drive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Nanjing Sute Electric Co., Ltd. Assignor: Xue Jianren Contract record no.: 2011320000924 Denomination of utility model: Apparatus for generating oscillating wave for electrical apparatus test Granted publication date: 20090527 License type: Exclusive License Record date: 20110705 |
|
| ASS | Succession or assignment of patent right |
Owner name: NANJING SUTE ELECTRIC CO., LTD. Free format text: FORMER OWNER: XUE JIANREN Effective date: 20111110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111110 Address after: 210061 No. 3 Hui Road, Nanjing hi tech Development Zone, Pukou, Jiangsu Patentee after: Nanjing Sute Electric Co., Ltd. Address before: 210061 No. 1 Yi Jing Road, Nanjing hi tech Development Zone, Jiangsu, China Patentee before: Xue Jianren |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090527 Termination date: 20170902 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |