CN104569672A - Power frequency superposition harmonic wave testing device for capacitor - Google Patents
Power frequency superposition harmonic wave testing device for capacitor Download PDFInfo
- Publication number
- CN104569672A CN104569672A CN201410848165.4A CN201410848165A CN104569672A CN 104569672 A CN104569672 A CN 104569672A CN 201410848165 A CN201410848165 A CN 201410848165A CN 104569672 A CN104569672 A CN 104569672A
- Authority
- CN
- China
- Prior art keywords
- capacitor
- loop
- tested
- examination
- harmonic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 164
- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000002474 experimental method Methods 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 3
- 238000009499 grossing Methods 0.000 abstract 2
- 238000012913 prioritisation Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The invention provides a power frequency superposition harmonic wave testing device for a capacitor. The power frequency superposition harmonic wave testing device for the capacitor is composed of a power frequency testing loop, a harmonic wave testing loop and a test loop. The power frequency testing loop is composed of a transformer, a power frequency adjustable electric reactor and a voltage regulator. The harmonic wave loop is composed of a frequency converter, a smoothing device and a parallel resonance transformer. The test loop is composed of an accompanying testing capacitor, a tested capacitor, a capacitive voltage divider and an oscilloscope. The transformer is in parallel connection with the power frequency adjustable electric reactor. The position between the frequency converter and the parallel resonance transformer is in series connection with the smoothing device. A bridge loop is formed by the accompanying testing capacitor and the tested capacitor. A low voltage arm of the capacitive voltage divider is in parallel connection with the oscilloscope. The test loop accesses to the position between the power frequency testing loop and the harmonic wave testing loop. The power frequency load and the harmonic wave load are jointly exerted on a capacitor unit by the power frequency testing loop and the harmonic wave testing loop. A waveform is monitored and analyzed through the capacitive voltage divider and the oscilloscope after the harmonic wave is superposed by the power frequency.
Description
Technical field
The present invention relates to high-voltage power capacitor test field, particularly, relate to a kind of industrial frequency superimposed harmonic test device of capacitor simulating actual track environment.
Background technology
Along with the raising of commercial production levels and living standards of the people, non-linear electrical equipment puts into operation in a large number in electrical network, and the proportion that the harmonic component causing electrical network accounts for is increasing.It not only increases the current supply loss of electrical network, and disturbs the protective device of electrical network and the normal operation of automation equipment, causes malfunction and the tripping of these devices, directly threatens the safe operation of electrical network.Generally use passive filtration unit (LB) at present, carry out harmonic wave control, capacitor is then the important component part of passive filtration unit (LB), the quality of power supply of the whole piece circuit of its fine or not direct relation run.The pilot projects such as the standard GB/T/T20094-2007 " HVDC (High Voltage Direct Current) transmission system shnt capacitor and ac filter capacitor " of present implementation and GB/T20093-2012 " HVDC (High Voltage Direct Current) transmission system DC filter capacitors and neutral bus impact capacitor " all do not simulate actual working conditions, lack and carry out as performance tests such as heat stabilization test, endurancing and noise test under harmonic environment capacitor unit.But just current, still lack the test unit of mature and reliable.
Summary of the invention
For defect of the prior art, be the operating characteristic of research capacitor unit under harmonic wave, the invention provides a kind of industrial frequency superimposed harmonic test device of capacitor simulating actual track environment.
According to the industrial frequency superimposed harmonic test device of a kind of capacitor provided by the invention, comprising: industrial frequency experiment loop, test loop and harmonic wave test loop;
Described test loop comprises first and accompanies that examination capacitor (C2) is accompanied in examination capacitor (C1), second, escort services try capacitor (C3), tested capacitor (Cx), capacitive divider (CFY) and oscillograph (SCOPE);
Wherein, described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3) and described tested capacitor (Cx) forms bridge type return, in this bridge type return, described first accompanies examination capacitor (C1), second to accompany examination capacitor (C2), tested capacitor (Cx) and escort services to try capacitor (C3) arranges successively; Described capacitive divider (CFY) is in parallel with described tested capacitor (Cx); Described capacitive divider (CFY) comprises two capacitors be connected in series; The low-voltage arm of described capacitive divider (CFY) is in parallel with described oscillograph (SCOPE);
Described industrial frequency experiment loop applies power frequency load to described tested capacitor (Cx);
Described harmonic test loop applies harmonic load to described tested capacitor (Cx).
As prioritization scheme, described industrial frequency experiment loop input side joint AC power, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and the other end of outgoing side is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx).
As prioritization scheme, described industrial frequency experiment loop comprises pressure regulator (TY), transformer (B), power frequency REgulatable reactor (L1);
The input end of described pressure regulator (TY) connects AC power, the output terminal of described pressure regulator (TY) is connected with the parallel connection of primary windings of described transformer (B), and described power frequency REgulatable reactor (L1) is parallel to the secondary coil of described transformer (B); One end of the secondary coil of described transformer (B) is connected to described first and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and another output terminal is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
As prioritization scheme, described harmonic wave loop input side joint alternating source, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and escort services to try between capacitor (C3), and the other end of outgoing side is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx).
As prioritization scheme, described harmonic wave loop comprises frequency converter (BP), filter (LB) and parallel resonance transformer (XB);
Described frequency converter (BP) connects alternating source, the output terminal of described frequency converter (BP) is connected to the input end of described filter (LB), and the output terminal of described filter (LB) is connected to the two ends of the primary coil of described parallel resonance transformer (XB); One end of the secondary coil of described parallel resonance transformer (XB) is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx), and the other end is connected to described first and accompanies examination capacitor (C1) and escort services to try between capacitor (C3); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
As prioritization scheme, it is identical with described tested capacitor (Cx) electric capacity that described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3).Compared with prior art, the present invention has following beneficial effect:
1, can selected harmonic frequency and industrial frequency superimposed arbitrarily;
2, industrial frequency experiment loop and harmonic test loop is mutually isolated is independent of each other;
3, adopt reactive-load compensation loop that the power of whole testing equipment and power supply can be made to greatly reduce;
4, test unit debugging is convenient, easily realizes industrial frequency superimposed harmonic wave.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, obviously, accompanying drawing in the following describes is only some embodiments of the present invention, for those skilled in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.In accompanying drawing:
Fig. 1 is a kind of capacitor industrial frequency superimposed harmonic test apparatus structure schematic diagram in embodiment;
Oscillograph (SCOPE) waveform when Fig. 2 is industrial frequency superimposed 3 subharmonic in embodiment;
Oscillograph (SCOPE) waveform when Fig. 3 is industrial frequency superimposed 11 subharmonic in embodiment.
In figure, sequence number represents: TY-pressure regulator, B-duplex frequency boostering transformer, XB-harmonic wave parallel resonance transformer, L1-power frequency REgulatable reactor, C1-first accompany examination capacitor, C2-second accompanies examination capacitor, C3-escort services try capacitor, the tested capacitor of Cx-, CFY-capacitive divider, SCOPE-oscillograph, LB-filter, BP-frequency converter.
Embodiment
Hereafter in the mode of specific embodiment, the present invention is described in detail by reference to the accompanying drawings.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that the embodiment that can also use other, or the amendment on 26S Proteasome Structure and Function is carried out to the embodiment enumerated herein, and can not depart from the scope and spirit of the present invention.
As shown in Figure 1, in the embodiment of the industrial frequency superimposed harmonic test device of a kind of capacitor provided by the invention, comprising: industrial frequency experiment loop, test loop and harmonic wave test loop.
Described test loop comprises first and accompanies that examination capacitor (C2) is accompanied in examination capacitor (C1), second, escort services try capacitor (C3), tested capacitor (Cx), capacitive divider (CFY) and oscillograph (SCOPE).
Wherein, described first accompany examination capacitor (C1), second accompany examination capacitor (C2), escort services try capacitor (C3) and described tested capacitor (Cx) forms bridge type return.In this bridge type return, described first accompanies examination capacitor (C1), second to accompany examination capacitor (C2), tested capacitor (Cx) and escort services to try capacitor (C3) arranges successively.Described capacitive divider (CFY) is in parallel with described tested capacitor (Cx); Described capacitive divider (CFY) comprises two capacitors be connected in series.The low-voltage arm of described capacitive divider (CFY) is in parallel with described oscillograph (SCOPE).
Described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3) and specifically refer to the bridge type return that described tested capacitor (Cx) forms: described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), tested capacitor (Cx) tries capacitor (C3) with escort services and is connected successively, and described escort services try capacitor (C3) and described first accompany examination capacitor (C1) be connected, described industrial frequency experiment loop and harmonic wave test loop are accessed on the connecting line of these four capacitors.This bridge type return can effectively prevent power frequency and harmonic wave from mutually disturbing, and power frequency and harmonic wave are independent of each other as the simulation test of described tested capacitor (Cx) provides good industrial frequency superimposed harmonic environment.
Described capacitive divider (CFY) comprises two capacitors be connected in series.
The present embodiment applies power frequency load and harmonic load to tested capacitor unit jointly by described industrial frequency experiment loop and described harmonic test loop, and isolates the impact between industrial frequency experiment loop and harmonic wave test loop.Waveform after monitoring industrial frequency superimposed harmonic wave by described capacitive divider (CFY) and described oscillograph (SCOPE) is also analyzed.
Described capacitive divider (CFY) is for acquisition test voltage, described oscillograph (SCOPE) is for the display of industrial frequency superimposed harmonic wave forms and analysis, what can obtain different power frequency and harmonic wave by regulating the humorous wave transformer of described parallel connection (B) superposes situation, and laboratory technician can obtain the display of real-time waveform from described oscillograph (SCOPE), be respectively as shown in Figures 2 and 3 industrial frequency superimposed 3 times and 11 subharmonic time oscillograph (SCOPE) waveform.
The present embodiment in conjunction with touch panel monitor system, can also carry out automatic controlling and monitoring to whole superposition test.
Described industrial frequency experiment loop applies power frequency load to described tested capacitor (Cx);
Described harmonic test loop applies harmonic load to described tested capacitor (Cx).
As prioritization scheme, described industrial frequency experiment loop input side joint AC power, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and the other end of outgoing side is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx).
Described industrial frequency experiment loop comprises pressure regulator (TY), transformer (B), power frequency REgulatable reactor (L1).
Described pressure regulator (TY) provides power frequency supply for described industrial frequency experiment loop; Described transformer (B) is for promoting power-frequency voltage; Described power frequency REgulatable reactor (L1) accompanies for compensating first the capacitive reactive power that examination capacitor (C2) is accompanied in examination capacitor (C1), second, escort services try capacitor (C3) and described tested capacitor (Cx).
The input end of described pressure regulator (TY) connects AC power, the output terminal of described pressure regulator (TY) is connected with the parallel connection of primary windings of described transformer (B), and described power frequency REgulatable reactor (L1) is parallel to the secondary coil of described transformer (B); One end of the secondary coil of described transformer (B) is connected to described first and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and another output terminal is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
The REgulatable reactor of power frequency described in the present embodiment (L1) and described transformer (B) and bridge type return is in parallel realizes power frequency parallel resonance, make the power frequency power of test loop and electric current minimum.The present embodiment regulates the capacitive reactive power of lagging reactive power compensation condenser by described power frequency REgulatable reactor (L1), reduces the capacity of transformer (B), pressure regulator (TY) and power supply described in industrial frequency experiment loop.
As prioritization scheme, described harmonic wave loop input side joint alternating source, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and escort services to try between capacitor (C3), and the other end of outgoing side is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx).
As prioritization scheme, described harmonic wave loop comprises frequency converter (BP), filter (LB) and parallel resonance transformer (XB).
Described frequency converter (BP) for providing Harmonic Current for described harmonic wave loop, and can provide multiple harmonic frequency.
Described frequency converter (BP) connects alternating source, the output terminal of described frequency converter (BP) is connected to the input end of described filter (LB), and the output terminal of described filter (LB) is connected to the two ends of the primary coil of described parallel resonance transformer (XB).One end of the secondary coil of described parallel resonance transformer (XB) is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx), and the other end is connected to described first and accompanies examination capacitor (C1) and escort services to try between capacitor (C3); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
Parallel connection described in the present embodiment is shaken, and humorous transformer (B) is in parallel with described bridge type return realizes harmonic wave parallel resonance, make the harmonic power of test loop and electric current minimum.
As prioritization scheme, it is identical with described tested capacitor (Cx) electric capacity that described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3).
The foregoing is only preferred embodiment of the present invention, those skilled in the art know, without departing from the spirit and scope of the present invention, can carry out various change or equivalent replacement to these characteristic sum embodiments.In addition, under the teachings of the present invention, can modify to adapt to concrete situation and material to these characteristic sum embodiments and can not the spirit and scope of the present invention be departed from.Therefore, the present invention is not by the restriction of specific embodiment disclosed herein, and the embodiment in the right of all the application of falling into all belongs to protection scope of the present invention.
Claims (6)
1. the industrial frequency superimposed harmonic test device of capacitor, is characterized in that, comprising: industrial frequency experiment loop, test loop and harmonic wave test loop;
Described test loop comprises first and accompanies that examination capacitor (C2) is accompanied in examination capacitor (C1), second, escort services try capacitor (C3), tested capacitor (Cx), capacitive divider (CFY) and oscillograph (SCOPE);
Wherein, described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3) and described tested capacitor (Cx) forms bridge type return, in this bridge type return, described first accompanies examination capacitor (C1), second to accompany examination capacitor (C2), tested capacitor (Cx) and escort services to try capacitor (C3) arranges successively; Described capacitive divider (CFY) is in parallel with described tested capacitor (Cx); Described capacitive divider (CFY) comprises two electric capacity be connected in series; The low-voltage arm electric capacity of described capacitive divider (CFY) is in parallel with described oscillograph (SCOPE);
Described industrial frequency experiment loop applies power frequency load to described tested capacitor (Cx);
Described harmonic test loop applies harmonic load to described tested capacitor (Cx).
2. device according to claim 1, it is characterized in that, described industrial frequency experiment loop input side joint AC power, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and the other end of outgoing side is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx).
3. device according to claim 2, is characterized in that, described industrial frequency experiment loop comprises pressure regulator (TY), transformer (B), power frequency REgulatable reactor (L1);
The input end of described pressure regulator (TY) connects AC power, the output terminal of described pressure regulator (TY) is connected with the parallel connection of primary windings of described transformer (B), and described power frequency REgulatable reactor (L1) is parallel to the secondary coil of described transformer (B); One end of the secondary coil of described transformer (B) is connected to described first and accompanies examination capacitor (C1) and second to accompany between examination capacitor (C2), and another output terminal is connected to described escort services and tries between capacitor (C3) and tested capacitor (Cx); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
4. device according to claim 1, it is characterized in that, described harmonic wave loop input side joint alternating source, one end of outgoing side is connected to described first respectively and accompanies examination capacitor (C1) and escort services to try between capacitor (C3), and the other end of outgoing side is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx).
5. device according to claim 4, is characterized in that, described harmonic wave loop comprises frequency converter (BP), filter (LB) and parallel resonance transformer (XB);
Described frequency converter (BP) connects alternating source, the output terminal of described frequency converter (BP) is connected to the input end of described filter (LB), and the output terminal of described filter (LB) is connected to the two ends of the primary coil of described parallel resonance transformer (XB); One end of the secondary coil of described parallel resonance transformer (XB) is connected to described second and accompanies between examination capacitor (C2) and tested capacitor (Cx), and the other end is connected to described first and accompanies examination capacitor (C1) and escort services to try between capacitor (C3); Described escort services try capacitor (C3) and tested capacitor (Cx) indirectly.
6. device according to claim 1, is characterized in that, it is identical with described tested capacitor (Cx) electric capacity that described first accompanies examination capacitor (C1), second to accompany tries capacitor (C2), escort services try capacitor (C3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848165.4A CN104569672A (en) | 2014-12-31 | 2014-12-31 | Power frequency superposition harmonic wave testing device for capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410848165.4A CN104569672A (en) | 2014-12-31 | 2014-12-31 | Power frequency superposition harmonic wave testing device for capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104569672A true CN104569672A (en) | 2015-04-29 |
Family
ID=53086206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410848165.4A Pending CN104569672A (en) | 2014-12-31 | 2014-12-31 | Power frequency superposition harmonic wave testing device for capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104569672A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974216A (en) * | 2016-05-05 | 2016-09-28 | 国网天津市电力公司 | Current injection circuit for power capacitor noise test |
| CN110940928A (en) * | 2019-12-13 | 2020-03-31 | 上海华电电力发展有限公司望亭发电分公司 | A device for detecting the location of AC intrusion in the DC system of a power plant |
| WO2022083788A1 (en) * | 2020-12-28 | 2022-04-28 | 无锡市电力滤波有限公司 | Composite voltage test device for dc link capacitor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793922A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Audible noise measuring circuit and method of power capacitor |
| CN101893682A (en) * | 2010-06-25 | 2010-11-24 | 珠海和佳医疗设备股份有限公司 | Method for testing resonant power amplifying circuit |
| CN201796095U (en) * | 2010-09-09 | 2011-04-13 | 苏州工业园区海沃科技有限公司 | Capacitor Bank Fault Tester |
| CN202351302U (en) * | 2011-11-25 | 2012-07-25 | 华北电网有限公司张家口供电公司 | Testing instrument for simulating unbalance current of serial compensating device |
| CN203069684U (en) * | 2013-03-07 | 2013-07-17 | 南方电网科学研究院有限责任公司 | Multi-harmonic simultaneous loading circuit for capacitor unit noise test |
| CN204374327U (en) * | 2014-12-31 | 2015-06-03 | 上海思源电力电容器有限公司 | The industrial frequency superimposed harmonic test device of capacitor |
-
2014
- 2014-12-31 CN CN201410848165.4A patent/CN104569672A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793922A (en) * | 2010-03-25 | 2010-08-04 | 南方电网技术研究中心 | Audible noise measuring circuit and method of power capacitor |
| CN101893682A (en) * | 2010-06-25 | 2010-11-24 | 珠海和佳医疗设备股份有限公司 | Method for testing resonant power amplifying circuit |
| CN201796095U (en) * | 2010-09-09 | 2011-04-13 | 苏州工业园区海沃科技有限公司 | Capacitor Bank Fault Tester |
| CN202351302U (en) * | 2011-11-25 | 2012-07-25 | 华北电网有限公司张家口供电公司 | Testing instrument for simulating unbalance current of serial compensating device |
| CN203069684U (en) * | 2013-03-07 | 2013-07-17 | 南方电网科学研究院有限责任公司 | Multi-harmonic simultaneous loading circuit for capacitor unit noise test |
| CN204374327U (en) * | 2014-12-31 | 2015-06-03 | 上海思源电力电容器有限公司 | The industrial frequency superimposed harmonic test device of capacitor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105974216A (en) * | 2016-05-05 | 2016-09-28 | 国网天津市电力公司 | Current injection circuit for power capacitor noise test |
| CN110940928A (en) * | 2019-12-13 | 2020-03-31 | 上海华电电力发展有限公司望亭发电分公司 | A device for detecting the location of AC intrusion in the DC system of a power plant |
| WO2022083788A1 (en) * | 2020-12-28 | 2022-04-28 | 无锡市电力滤波有限公司 | Composite voltage test device for dc link capacitor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103344936B (en) | Method for fault simulation test of capacitor voltage transformer | |
| CN103616574B (en) | A kind of electric automobile anti-alone island detection system of energy storage combining inverter and detection method | |
| CN202854255U (en) | Capacitor type potential transformer testing device | |
| CN203025309U (en) | Direct current partial discharge test analysis device for analog converter transformer | |
| CN105974290A (en) | Dry type air reactor turn-to-turn insulation performance detection system and method | |
| CN103884953B (en) | A kind of capacitance type potential transformer damping circuit fault diagnosis system | |
| CN103543361B (en) | The extra-high voltage field for Large Transformer no-load test method of frequency conversion voltage adjusting | |
| CN104749408A (en) | Capacitor voltage transformer applied to harmonic measurement | |
| CN108037430A (en) | A kind of 10kV distribution transformers three-phase partial discharge test system | |
| CN103267917B (en) | A kind of method and apparatus of high-capacity reactive compensation device full-load test | |
| CN104569672A (en) | Power frequency superposition harmonic wave testing device for capacitor | |
| CN204374327U (en) | The industrial frequency superimposed harmonic test device of capacitor | |
| CN105277913B (en) | A kind of test method of capacitance type potential transformer | |
| RU112525U1 (en) | AUTOMATED DIAGNOSTIC AND MONITORING SYSTEM OF POWER CABLE LINES INSULATION | |
| CN106772200B (en) | CVT metering error anomaly evaluation method and system based on ground capacitance current | |
| CN108233873A (en) | A kind of multi-channel noise simulation generator | |
| CN203849352U (en) | Apparatus for diagnosing fault of damping loop of capacitor voltage transformer | |
| CN205809573U (en) | Multi-function electricity fraudulent using-proof Simulation Experimental Platform | |
| CN204789785U (en) | Portable intelligent substation relay protection testing arrangement | |
| CN203811755U (en) | A testing apparatus used for a triple-frequency withstand voltage test for a voltage transformer | |
| CN107422202A (en) | A kind of 3000kVA grades large-capacity transducer low voltage crossing pilot system | |
| CN202330523U (en) | Capacitive sampling voltage box for voltage quality monitoring of 220kV power system | |
| CN104914281A (en) | High-capacity frequency-tunable test power supply and test method | |
| CN206563779U (en) | Capacitive apparatus intelligent comprehensive resistance standard test device | |
| Staroszczyk | Problems with in-service (on-line) power transformer parameters determination-case study |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |
|
| WD01 | Invention patent application deemed withdrawn after publication |