CN201724964U - Power device for AC and DC superimposed synthetized voltage test of voltage test - Google Patents
Power device for AC and DC superimposed synthetized voltage test of voltage test Download PDFInfo
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- CN201724964U CN201724964U CN2009202774694U CN200920277469U CN201724964U CN 201724964 U CN201724964 U CN 201724964U CN 2009202774694 U CN2009202774694 U CN 2009202774694U CN 200920277469 U CN200920277469 U CN 200920277469U CN 201724964 U CN201724964 U CN 201724964U
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- 238000012360 testing method Methods 0.000 title claims abstract description 51
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 16
- 239000010703 silicon Substances 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 description 20
- 230000015556 catabolic process Effects 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 10
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- 238000010586 diagram Methods 0.000 description 7
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- 239000002131 composite material Substances 0.000 description 3
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- 241000219780 Pueraria Species 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 230000000881 depressing effect Effects 0.000 description 1
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Abstract
The utility model provided a power device for the AC and DC superimposed synthetized voltage test, which comprises a voltage doubling rectifying circuit A, high voltage capacitors c2 and c3, high voltage resistors r3 and r4, a high voltage silicon rectifier stack d3, a high voltage AC power V_ac2, and connected nodes n12, n13, n15 and n16 in a loop. The power device for the AC and DC superimposed synthetized voltage test, provided by the utility model, can contain pure AC voltage, pure DC voltage and AC and DC superimposed synthetized voltage, can be adjusted to independently output AC component and DC component, and can output the AC and DC superimposed synthetized voltage waveform with different components according to needs.
Description
Technical field
The utility model belongs to the high voltage and insulation technology field, particularly a kind of AC superposed DC synthesized voltage test power device.
Background technology
China has become world direct current transportation big country, building the highest grade of direct-current transmission voltage " Yunnan-Guangdong " in the world, " Xiang Jiaba-Shanghai " ± 800kV DC transmission engineering (world is up at present ± and 600kV), engineering, the research project relevant with direct current more and more receive publicity.Existing engineering experience and statistics show: in the HVDC (High Voltage Direct Current) transmission system, the Insulation Problems of numerous crucial primary equipments such as converter power transformer, sleeve pipe is the restriction design and causes the topmost factor of field accident.WG B4.04 working group of CIGRE high voltage direct current subcommittee statistics shows that the HVDC (High Voltage Direct Current) transmission system equipment failure rate is more than 2 times of AC system.
In first ± 500kV that China put into operation in 1984 " Pueraria lobota-on " DC transmission engineering, repeatedly occur the Insulation Problems at a plurality of positions such as valve side winding, lead-in wire, shunting switch during first batch of converter power transformer major insulation is tested, Insulation Problems in the follow-up operation process, also repeatedly occurs.At present, " cloud wide ± 800kV DC transmission engineering " first the converter power transformer during China builds is responsible for the manufacturing by Siemens Company, and " upwards ± 800kV DC transmission engineering " first converter power transformer manufactured and designed by ABB.Siemens, ABB are in the top standard in the world in converter power transformer manufacturing field, insulation fault all occurred but become in the process of the test in Siemens, first ± 800kV of the ABB change of current.
Because manufacturing plant and R﹠D institution are in making, study converter power transformer insulating material process both at home and abroad, only can examine by independent alternating voltage, DC voltage test respectively, and in engineering reality, especially in HVDC (High Voltage Direct Current) transmission system, large number quipments acting in conjunction of bearing interchange stack DC voltage in service, owing to can't simulate actual condition in the process of the test equipment dependability is effectively examined, caused equipment failure rate higher relatively.
High-Voltage Technology is the application technology based on experimental study, and test unit is the prerequisite and the basis of carrying out field of high-voltage technology research.Under the prior art condition, main high-voltage test power supply comprises power frequency (interchange) voltage generator, DC voltage generator, impulse voltage generator etc., does not also have interchange, DC stacked experiment power supply system together.Present stage, the IEC and the domestic change of current become in the test standard, and use respectively exchanges the insulating property of withstand voltage, DC break down voltage examination change of current change, does not have the relevant report about the discharge source system of no office that exchanges the stack direct current both at home and abroad.
The utility model content
In order to overcome above defective, the purpose of this utility model is to provide a kind of AC superposed DC synthesized voltage experiment power supply.It is significant to the research of the aspects such as selection of puncture stress influence, change of current change proof stress validity to mechanism, alternating current-direct current component that the research alternating current-direct current mixes the shelf depreciation generation under the field intensity.
For this reason, the utility model proposes a kind of AC superposed DC synthesized voltage test power device, comprise voltage doubling rectifing circuit A, high-voltage capacitance c2, c3, high-tension resistive r3, r4, high voltage silicon rectifier stack d3, connected node n12, n13 in high-voltage ac power V_ac2 and the loop, n15, n16 is characterized in that:
One end ground connection of described voltage doubling rectifing circuit, the other end and c2 are parallel to the n12 node, behind the n12 node level be parallel to the n13 node with flow point depressor B always again after high-tension resistive r3 connects, export the n16 node to behind the n13 node grade with after high voltage silicon rectifier stack d3 connects;
High-voltage ac power V_ac2 one end ground connection, the other end and high-tension resistive r4 are series at the n15 node, loop after the series connection is parallel to the n15 node with an AC potentiometer C again, level is connected with high-voltage capacitor c3 again behind the n15 node, the final realization exports the alternating voltage component to the n16 node, level series connection inserts test product behind the n16 node, thereby provides different AC-to-DC component of voltages for test product N.
Wherein, described voltage doubling rectifing circuit A comprises high-voltage ac power V_ac1, high-voltage capacitance c1 and high voltage silicon rectifier stack d2, d1; The end ground connection of described high-voltage ac power V_ac1, the other end are connected back in parallel with high voltage silicon rectifier stack d2 with high-voltage capacitance c1, and then connect with high voltage silicon rectifier stack d1; Described voltage doubling rectifing circuit is converted into DC voltage with the alternating voltage of high-voltage ac power V_ac1.
Wherein, described divider B comprises the high-tension resistive r1 and the r2 of series connection.
Wherein, described AC potentiometer C comprises the high-voltage capacitance c4 and the c5 of series connection.
The output voltage of described n16 node can comprise pure AC voltage, pure DC voltage and AC superposed DC synthesized voltage, output AC component, DC component are independent respectively adjustable, can export the interchange stack DC voltage waveform of different components as required, in the voltage-regulation process, since 0 output voltage that raises high-voltage ac power V_ac1, then the DC voltage component of system begins to increase, and the VD component satisfies:
V_n16dc=-0.7009862065743-0.4185165047986*V_ ac2-0.3042724513701*V_n13; Wherein V_n16dc is the DC voltage component effective value on the experiment power supply system output n16 node, and V_n13dc is the DC voltage of n13 node;
In the voltage-regulation process, since 0 output voltage that raises AC power V_ac2, then the AC compounent peak-to-peak value corresponding 0 of system begins to increase, wherein the output voltage on output AC component and the V_ac1 satisfies: the correlationship of V_n16ac=1.024+0.995*V_ac1, wherein V_n16ac is the alternating voltage component effective value on the experiment power supply system output n16 node.
Between positive and negative the two poles of the earth of the resultant voltage test power device of said structure, insert test specimen N and can constitute the resultant voltage pilot system, this system can be used for the insulation characterisitic experimental study of the typical electrode of needle plate, ball plate and/or flat board, and the fields such as insulation characterisitic experimental study of suspend discharge and/or shelf depreciation.
The beneficial effects of the utility model are:
Fast development along with D.C. high voltage transmission, the Insulation Problems of DC equipment such as converter power transformer more and more receives publicity, and the experiment power supply of the utility model design can be implemented in to apply simultaneously on insulating material and model, the product and exchanges stack DC experiment voltage, more real simulated the change of current become voltage stress in the operational process, and then the Insulation Problems in the researching DC transmission system, filled up domestic and international blank in this research field.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is an alternating current-direct current resultant voltage test power device schematic diagram of the present utility model;
Fig. 2 is the actual measurement output waveform figure of power of alterating and direct current voltage;
Fig. 3 is typical needle plate test model;
Fig. 4 shows dc breakdown voltage and the graph of a relation that adds alternating voltage in advance;
Fig. 5 shows ac breakdown voltage and the graph of a relation that adds DC voltage in advance;
Fig. 6 shows the influence of different pre-making alives to breakdown characteristics;
Fig. 7 is that experimental circuit is put in the office that alterating and direct current is depressed.
Embodiment
Below in conjunction with accompanying drawing experiment power supply of the present utility model is described in further detail.
As shown in Figure 1, experiment power supply described in the utility model comprises high-voltage capacitance c1, c2, c3, c4, c5; High-tension resistive r1, r2, r3, r4; High voltage silicon rectifier stack d1, d2, d3; Connected node n11, n12 in high-voltage ac power V_ac1, V_ac2 and the loop, n13, n15, n16.An end ground connection, its other end of described high-voltage ac power V_ac1 are connected with high-voltage capacitance c1, loop after the series connection and d2 are parallel to the n11 node, behind the n11 node level be parallel to the n12 node with high-voltage capacitance c2 again after high voltage silicon rectifier stack d1 connects, level is parallel to the n13 node with the divider B that is composed in series with r1, r2 again after high-tension resistive r3 connects behind the n12 node, and the high voltage silicon rectifier stack d3 that grade connects again behind the n13 node exports the n16 node to; The end ground connection of described high-voltage ac power V_ac2, the other end and high-tension resistive r4 are series at the n15 node; Loop after the series connection is parallel to the n15 node with the AC potentiometer C that C4, C5 are composed in series again; Level connect with high-voltage capacitor c3 again behind the n15 node, and final the realization exports the alternating voltage component to the n16 node, level series connection access test product behind the n16 node, thus provide different AC-to-DC component of voltages for test product N; The described voltage multiplying rectifier loop A that is made of high-voltage ac power V_ac1, high-voltage capacitance c1 and high voltage silicon rectifier stack d2, d1 is converted into DC voltage with the alternating voltage of high-voltage ac power V_ac1, and voltage multiplying rectifier loop A is replaceable to change the DC voltage generator that progression can form different electric pressures for various general passing through.
Described high-voltage capacitance c2 and high-tension resistive r3 work to improve n12 point output dc voltage ripple and limiting short-circuit current in system; Described high-tension resistive r1 connects with high-tension resistive r2 and constitutes divider B, is used to measure the DC voltage of n13 node; Described high voltage silicon rectifier stack d3 is connected between node n13 and the n16, plays the isolation AC compounent, effectively stops alternating voltage to import DC loop into; Described high-voltage ac power V_ac2 connects with high-tension resistive r4 and constitutes AC power, and high-tension resistive r4 plays a part the short-circuit current that restriction high-voltage ac power V_ac2 produces when the test product short circuit; Described high-voltage capacitance c4 connects with high-voltage capacitance c5 and constitutes AC potentiometer C, is used for the measurement of the alternating voltage component of ac power output n15 node; Described high-voltage capacitance c3 is connected between n15 node and n16 node, can isolate DC voltage on the n16 node and enter AC power supply system between n15 node and the ground.
Fig. 2 is the actual measurement voltage oscillogram by alternating current-direct current composite power source test unit shown in Figure 1 output, not distortion of AC wave shape as can be seen among Fig. 2, and interchange, direct supply can realize independently pressurizeing and being independent of each other.
The insulating oil breakdown characteristics is an example under the needle plate condition that AC superposed DC synthesized voltage test power device of the present utility model carries out to utilize below, and the test layout is made of jointly the needle point of 0.1mm and the circular corrosion resistant plate of diameter 300mm as shown in Figure 3.
On the needle plate model of Fig. 3, apply interchange, direct current synthetic test voltage simultaneously, measure breakdown characteristics.In the process of the test, at first apply the alternating voltage of fixed component, progressively increase DC voltage again and puncture until test product; Test findings as shown in Figure 4, horizontal ordinate is that AC supply voltage, ordinate are direct supply voltage.At first apply the DC voltage of fixed component, puncture by voltage to the test product of progressively increasing exchanges again, test findings as shown in Figure 5, among Fig. 5 the result be different exchange, the voltage breakdown after the DC component stack.Test findings shows that along with the rising of alternating voltage, dc breakdown voltage reduces with linearity; Along with the rising of DC voltage, alternating voltage also is linear to be reduced, and this conclusion is to disclose the rule of AC-to-DC voltage to the breakdown characteristics influence at home and abroad first.
Test findings among Fig. 5 is carried out inverse transformation (horizontal ordinate conversion), can obtain test findings shown in Figure 6.In the insulating Design field, generally believe that oily insulation breakdown characteristic is influenced by electric field intensity mainly.When adding different voltage in advance, the electric field intensity during insulation breakdown should be consistent.But as can be seen from Figure 6, under same DC voltage, add model voltage breakdown under the alternating voltage in advance and add under the DC condition high approximately 8% more in advance.Therefore, pre-making alive has a significant effect to the alternating current-direct current disruptive strength, and this conclusion has great importance to the Insulation Test under the DC condition, insulation examination.In addition, this conclusion there is no relevant report at home and abroad, is difficult to obtain related law by theoretical analysis under the prerequisite of this device not having, and therefore, the development of this device is significant.
By using the test unit in the utility model, carry out needle plate, ball plate, dull and stereotyped typical electrode and the insulation characterisitics such as discharge, shelf depreciation that suspend are tested experimental studies, can obtain a large amount of preciousnesses, have originality, the achievement in research of novelty.
Referring to Fig. 7, the shelf depreciation experimental study of depressing with alterating and direct current is an example below, introduces the application of the utility model alterating and direct current origin system.3 block diagrams are respectively among the figure: block diagram 1 is the alterating and direct current origin system, is the AC-to-DC power-supply system that the utility model designs, and schematic diagram as shown in Figure 1; Cx is the test test product in the block diagram 2, and is in parallel with experiment power supply; Block diagram 3 is the experimental measurement system, mainly is made up of voltage divider Ck, detection impedance Z m, by impedance of cable joint detection and Partial discharge detector, realizes partial discharge monitoring.Test product Cx is with in parallel with the alterating and direct current origin system again after measuring system is in parallel, and promptly alterating and direct current origin system output voltage acts directly on test product and the measuring system.
Power-supply system can require to provide the composite voltage of pure AC voltage, pure DC voltage and various different component of voltages according to the difference of test, utilize the office in the block diagram 3 to put measuring system and observe after being applied on the test product, obtain the discharge characteristic of test product under alternating voltage, DC voltage and alternating current-direct current composite voltage, by comparative analysis and then obtain the insulation characterisitic of test product under different voltages.
Main meaning of the present utility model is embodied in: proposed a kind of power-supply system of output AC, direct current resultant voltage simultaneously first, the AC and DC component of voltage is independent adjustable.Significant for carrying out insulation characterisitic research under interchange, the direct current resultant voltage, test examination, the research of insulation breakdown mechanism etc.Particularly present, not comprehensive to large-scale powers such as converter power transformer equipments failure of insulation mechanism, insulation characterisitic research at home and abroad, under the high situation of equipment failure rate, the research of this device has important science and engineering significance.
The utility model is described according to specific exemplary embodiment herein.To carry out suitable replacement under the scope of the present utility model or revise will be conspicuous not breaking away to one skilled in the art.Exemplary embodiment only is illustrative, rather than to the restriction of scope of the present utility model, scope of the present utility model is by appended claim definition.
Claims (4)
1. an AC superposed DC synthesized voltage test power device comprises voltage doubling rectifing circuit A, high-voltage capacitance c2, c3, high-tension resistive r3, r4, high voltage silicon rectifier stack d3, connected node n12, n13 in high-voltage ac power V_ac2 and the loop, n15, n16 is characterized in that:
One end ground connection of described voltage doubling rectifing circuit, the other end and c2 are parallel to the n12 node, behind the n12 node level be parallel to the n13 node with flow point depressor B always again after high-tension resistive r3 connects, export the n16 node to behind the n13 node grade with after high voltage silicon rectifier stack d3 connects;
High-voltage ac power V_ac2 one end ground connection, the other end and high-tension resistive r4 are series at the n15 node, loop after the series connection is parallel to the n15 node with an AC potentiometer C again, level is connected with high-voltage capacitor c3 again behind the n15 node, the final realization exports the alternating voltage component to the n16 node, level series connection inserts test product behind the n16 node, thereby provides different AC-to-DC component of voltages for test product N.
2. resultant voltage test power device as claimed in claim 1 is characterized in that: described voltage doubling rectifing circuit A comprises high-voltage ac power V_ac1, high-voltage capacitance c1 and high voltage silicon rectifier stack d2, d1; The end ground connection of described high-voltage ac power V_ac1, the other end are connected back in parallel with high voltage silicon rectifier stack d2 with high-voltage capacitance c1, and then connect with high voltage silicon rectifier stack d1; Described voltage doubling rectifing circuit is converted into DC voltage with the alternating voltage of high-voltage ac power V_ac1.
3. resultant voltage test power device as claimed in claim 1 or 2 is characterized in that: described divider B comprises the high-tension resistive r1 and the r2 of series connection.
4. resultant voltage test power device as claimed in claim 1 or 2 is characterized in that: described AC potentiometer C comprises the high-voltage capacitance c4 and the c5 of series connection.
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| CN2009202774694U CN201724964U (en) | 2009-12-02 | 2009-12-02 | Power device for AC and DC superimposed synthetized voltage test of voltage test |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102749543A (en) * | 2012-07-19 | 2012-10-24 | 南方电网科学研究院有限责任公司 | Electrical insulation electric heating aging test device under composite voltage |
| CN103487732A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Method and device for testing alternating-current and direct-current voltages between valve ends of modularized multi-level converter valve |
| CN107449949A (en) * | 2017-09-06 | 2017-12-08 | 常州同惠电子股份有限公司 | Apply DC offset voltage in the device of AC sine wave signal source |
| CN107831417A (en) * | 2017-10-26 | 2018-03-23 | 重庆大学 | Impurity particle kinetic characteristic measuring system and measuring method in a kind of insulating oil |
| CN108680835A (en) * | 2018-04-26 | 2018-10-19 | 天津大学 | Paper oil insulation surface charge measuring device and method based on DC stacked harmonic wave |
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
-
2009
- 2009-12-02 CN CN2009202774694U patent/CN201724964U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749543A (en) * | 2012-07-19 | 2012-10-24 | 南方电网科学研究院有限责任公司 | Electrical insulation electric heating aging test device under composite voltage |
| CN103487732A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Method and device for testing alternating-current and direct-current voltages between valve ends of modularized multi-level converter valve |
| CN103487732B (en) * | 2013-09-24 | 2015-11-04 | 许继集团有限公司 | Alterating and direct current compression testing device and method between the valve end of modular multilevel converter valve |
| CN107449949A (en) * | 2017-09-06 | 2017-12-08 | 常州同惠电子股份有限公司 | Apply DC offset voltage in the device of AC sine wave signal source |
| CN107449949B (en) * | 2017-09-06 | 2023-06-27 | 常州同惠电子股份有限公司 | Device for applying DC bias voltage to AC sine wave signal source |
| CN107831417A (en) * | 2017-10-26 | 2018-03-23 | 重庆大学 | Impurity particle kinetic characteristic measuring system and measuring method in a kind of insulating oil |
| CN108680835A (en) * | 2018-04-26 | 2018-10-19 | 天津大学 | Paper oil insulation surface charge measuring device and method based on DC stacked harmonic wave |
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
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Owner name: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: CHINA ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140321 |
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Free format text: CORRECT: ADDRESS; FROM: 100192 HAIDIAN, BEIJING TO: 100031 XICHENG, BEIJING |
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Effective date of registration: 20140321 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: China Electric Power Research Institute Address before: 100192 Beijing city Haidian District Qinghe small Camp Road No. 15 Patentee before: China Electric Power Research Institute |
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