CN208188266U - A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system - Google Patents
A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system Download PDFInfo
- Publication number
- CN208188266U CN208188266U CN201820134335.6U CN201820134335U CN208188266U CN 208188266 U CN208188266 U CN 208188266U CN 201820134335 U CN201820134335 U CN 201820134335U CN 208188266 U CN208188266 U CN 208188266U
- Authority
- CN
- China
- Prior art keywords
- phase
- transformer
- tested
- output end
- exciting
- 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.)
- Active
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to a kind of Three-Phase Transformer inducting-voltage proof and local discharge test systems, including sequentially connected variable-frequency power sources, exciting transformer and tested transformer；The power input of variable-frequency power sources connects 380V three-phase voltage input power, and the power output end of variable-frequency power sources connects the exciting transformer three-phase input end；Exciting transformer three-phase output end connects the tested Three-Phase Transformer input terminal；It has been sequentially connected in series capacitance of bushing, excitation impedance and PD meter respectively after tested Three-Phase Transformer output end；It is connected to a magnet controlled reactor respectively on the connecting line of exciting transformer three-phase output end and the tested Three-Phase Transformer input terminal.The utility model is when carrying out the test of Three-Phase Transformer office, magnet controlled reactor controls its control winding electric current respectively to change its induction reactance value, to achieve the purpose that the size and smooth adjustment inductance that adjust reactive current, the adjusting that every phase compensation inductance can be completed, realizes the requirement of local discharge test phase splitting compensation.
Description
Technical field
The utility model relates to a kind of Three-Phase Transformer inducting-voltage proof and local discharge test systems, belong to High-Voltage Test Technology
Field.
Background technique
Current transformer discharge, induced over voltage withstand test device are to provide frequency multiplication AC power source by generating set, by again
After frequency generator isolated from power filter filters out power circuit high-frequency interferencing signal and generating set harmonic signal, it is applied to transformation
The low-pressure end of device, high-voltage end induce test high voltage, carry out partial discharge, induced over voltage withstand test.Existing transformer pressure-resistant equipment,
Using the frequency multiplication AC power source provided by medium frequency electric generating unit, medium frequency electric generating unit is that rotation, a frequency are non-adjustable
Power supply device, it drives generator to generate the three phase mains of one 115 or 250Hz fixed frequency by motor, then by three
Phase transformation two-phase transformer becomes single phase poaer supply as field power supply and supplies transformer.Since the device frequency is non-adjustable, idle benefit
More than ten of compensation reactor will be needed by the outer mode for matching reactor is changed by repaying；Since motor starting current is big, little Rong
The construction temporary transformers (150kVA or less) of amount are difficult to start generating set, and package unit is complicated heavy, since frequency cannot
Continuously adjustable, it can only cannot double as the field power supply of serial resonant equipment, for body as the power supply of transformer test
The requirements such as long-pending small, light-weight, low noise, the labor intensity for reducing staff are difficult to realize.
Chinese patent application CN201320079623, a kind of 300kW partial discharge of transformer, induced over voltage withstand test system,
Including sequentially connected no partial discharge frequency conversion power supply (1), exciting transformer (2), compensator transformer (3), capacitive divider (4), survey
Transformer (5), PD meter detection impedance (6), PD meter (7) and variable-frequency power sources control cabinet (8) are tried, wherein no partial discharge frequency conversion electricity
The output end in source (1) is also connect with the input terminal of variable-frequency power sources control cabinet (8), and the power supply of the no partial discharge frequency conversion power supply (1) is defeated
Enter end connection 380V three-phase voltage input power；In carrying out three-phase induction pressure resistance and local discharge test, variable-frequency power sources is to belong to nothing
Partial discharge frequency conversion power supply, it is desirable that the power factor that it is loaded is close to 1, but in real system, since three-phase system is per relatively
Capacitance is inconsistent, and the compensator transformer of every phase is difficult to match, and when leading to test, experiment power supply is difficult to work in required work
Make state, transformer can not be obtained accurately per relatively capacitor.
Utility model content
The technical problems to be solved in the utility model is overcome the deficiencies in the prior art, and the utility model provides a kind of transformation
The pressure resistance of device three-phase induction and local discharge test system, can adjust every phase inductance amount respectively, and compensation is made to reach ideal state.
In order to achieve the above objectives, the technical solution adopted in the utility model is: a kind of Three-Phase Transformer inducting-voltage proof and office
Put pilot system, including sequentially connected variable-frequency power sources, exciting transformer and tested transformer；The power supply of the variable-frequency power sources
Input terminal connects 380V three-phase voltage input power, and the power output end of the variable-frequency power sources connects the exciting transformer three-phase
Input terminal；The exciting transformer three-phase output end connects the tested Three-Phase Transformer input terminal；The tested transformation
Capacitance of bushing, excitation impedance and PD meter have been sequentially connected in series after device three-phase output end respectively；It is defeated in the exciting transformer three-phase
It is connected to a magnet controlled reactor respectively on the connecting line of outlet and the tested Three-Phase Transformer input terminal.
It is further improved as the utility model, the magnet controlled reactor by provide compensation current path main winding and
The control winding for applying the inductance that a small control signal is changeable main winding is constituted.
Due to the application of the above technical scheme, the utility model has the advantage that compared with prior art
The Three-Phase Transformer inducting-voltage proof and local discharge test system of the utility model, are produced by no partial discharge frequency conversion power supply
Raw frequency, pulsewidth can the ac square-wave voltage of continuous modulation be sent to exciting transformer, exciting transformer output voltage is added to survey
It tries on transformer, allows test transformer to be in test job voltage, while by PD meter under test job state
Test transformer carries out partial discharge detection, realizes the inducting-voltage proof test to test transformer and local discharge test；Carry out transformation
Three magnetic when device three-phase office tests, on the connecting line of exciting transformer three-phase output end and tested Three-Phase Transformer input terminal
Control reactor controls each magnet controlled reactor control winding electric current respectively to change its induction reactance value, adjusts reactance electricity to reach
The size of stream and the purpose of smooth adjustment inductance can be completed the adjusting of every phase compensation inductance, realize local discharge test split-phase
The requirement of compensation.
Detailed description of the invention
Technical solutions of the utility model are described further with reference to the accompanying drawing:
Attached drawing 1 is the Three-Phase Transformer inducting-voltage proof of the utility model and the structural schematic diagram of local discharge test system；
Attached drawing 2 is the schematic illustration of the magnet controlled reactor of the utility model；
Magnetization curve schematic diagram when attached drawing 3 is the magnet controlled reactor work of the utility model.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the utility model is described in further detail.
A kind of Three-Phase Transformer inducting-voltage proof of the utility model as shown in Fig. 1 and local discharge test system, including successively
Variable-frequency power sources, exciting transformer and the tested transformer of connection；The power input of variable-frequency power sources connects 380V three-phase voltage
The power output end of input power, variable-frequency power sources connects the exciting transformer three-phase input end；The exciting transformer three-phase
Output end connects the tested Three-Phase Transformer input terminal；It is sequentially connected in series respectively after the tested Three-Phase Transformer output end
There are capacitance of bushing, excitation impedance and PD meter；In the exciting transformer three-phase output end and the tested Three-Phase Transformer
A magnet controlled reactor is connected on the connecting line of input terminal respectively.Generating frequency, pulsewidth by no partial discharge frequency conversion power supply can be continuous
The ac square-wave voltage of modulation is sent to exciting transformer, and exciting transformer output voltage is added in test transformer, and test is allowed to become
Depressor is in test job voltage, while carrying out partial discharge inspection to the test transformer under test job state by PD meter
It surveys, realizes the inducting-voltage proof test to test transformer and local discharge test.
As shown in attached drawing 2,3, magnet controlled reactor is by providing the main winding of compensation current path and applying a small control
Signal is that the control winding of the inductance of changeable main winding is constituted.
Magnet controlled reactor (MCR) is based on magnetic amplifier principle come work, it is that a kind of alternating current-direct current is magnetized simultaneously can
It controls the iron core reactor of its saturation degree, when work, minimum dc power (about the 0.1% of reactor rated power can be used
~0.5%) change the operating point (i.e. the saturation degree of iron core change iron core in other words magnetic permeability mu) of control iron core, to change
Its induction reactance value, to achieve the purpose that the size and smooth adjustment inductance that adjust reactive current.Its advantage protruded is: steady
It is fixed, reliable, small in size, cost is relatively low, control flexibly, maintenance management it is easy.Wherein, i is reactor main circuit current；ikFor control
Winding current processed.
When carrying out the test of Three-Phase Transformer office, exciting transformer three-phase output end and tested Three-Phase Transformer input terminal
Connecting line on three magnet controlled reactors control each magnet controlled reactor control winding electric current respectively to change its induction reactance value,
To achieve the purpose that the size and smooth adjustment inductance that adjust reactive current, the tune of every phase compensation inductance can be completed
Section realizes the requirement of local discharge test phase splitting compensation.
The above is only the specific application examples of the utility model, do not constitute any limit to the protection scope of the utility model
System.Any technical scheme formed by adopting equivalent transformation or equivalent replacement, all fall within the utility model rights protection scope it
It is interior.
Claims (2)
1. a kind of Three-Phase Transformer inducting-voltage proof and local discharge test system, including sequentially connected variable-frequency power sources, exciting transformer
With tested transformer；The power input of the variable-frequency power sources connects 380V three-phase voltage input power, it is characterised in that: institute
The power output end for stating variable-frequency power sources connects the exciting transformer three-phase input end；The exciting transformer three-phase output end connects
Connect the tested Three-Phase Transformer input terminal；Casing electricity has been sequentially connected in series after the tested Three-Phase Transformer output end respectively
Appearance, excitation impedance and PD meter；In the exciting transformer three-phase output end and the tested Three-Phase Transformer input terminal
A magnet controlled reactor is connected on connecting line respectively.
2. Three-Phase Transformer inducting-voltage proof according to claim 1 and local discharge test system, it is characterised in that: the magnetic control
Reactor is by providing the main winding of compensation current path and applying the inductance that a small control signal is changeable main winding
Control winding constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134335.6U CN208188266U (en) | 2018-01-26 | 2018-01-26 | A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820134335.6U CN208188266U (en) | 2018-01-26 | 2018-01-26 | A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208188266U true CN208188266U (en) | 2018-12-04 |
Family
ID=64442245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820134335.6U Active CN208188266U (en) | 2018-01-26 | 2018-01-26 | A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208188266U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924830A (en) * | 2021-03-04 | 2021-06-08 | 国网山西省电力公司电力科学研究院 | Transformer three-phase partial discharge simultaneous pressurization test device and test method based on single-phase variable frequency power supply |
-
2018
- 2018-01-26 CN CN201820134335.6U patent/CN208188266U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924830A (en) * | 2021-03-04 | 2021-06-08 | 国网山西省电力公司电力科学研究院 | Transformer three-phase partial discharge simultaneous pressurization test device and test method based on single-phase variable frequency power supply |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203069734U (en) | 300kW transformer partial discharge and induced over voltage withstand test system | |
| CN102175956B (en) | Long duration induction voltage withstand test device of ultrahigh-voltage transformer | |
| CN109521338B (en) | Frequency conversion parallel resonance voltage withstand test method based on cascade voltage boosting | |
| CN101833059B (en) | Industrial frequency resonance transformer | |
| CN105203853B (en) | A kind of measurement method of large capacity high frequency transformer parasitic capacitance | |
| CN205608139U (en) | Change of current becomes partial discharge test device | |
| CN102944775B (en) | Characteristic test system for high-capacity transformer based on high-voltage variable-frequency power supply | |
| CN104198900A (en) | Testing device for long term voltage induction and partial discharge measurement test | |
| CN103823092A (en) | High voltage crosslinked cable test power supply based on FPGA | |
| CN200972429Y (en) | Series resonance power frequency pressure test device | |
| CN208188266U (en) | A kind of Three-Phase Transformer inducting-voltage proof and local discharge test system | |
| CN104345234A (en) | Harmonic power supply feature test system and method | |
| CN207650291U (en) | A kind of vehicular industrial frequency AC Withstand test device based on controlled reactor | |
| CN203786255U (en) | Power transformer power frequency withstand voltage test apparatus | |
| CN201955438U (en) | Ultra high voltage transformer long-time induced over voltage withstand test device | |
| CN201955433U (en) | Induction withstand voltage tester for pure-capacitive electromagnetic voltage transformer | |
| CN201637767U (en) | Power frequency resonance transformer | |
| CN104076173A (en) | High frequency power-inputted non-partial discharge ultra-high voltage DC high voltage generation device | |
| CN208971399U (en) | A kind of magnetic control resonance industrial frequency experiment power supply | |
| CN102193051A (en) | Field local discharge testing device and method of 1000 kV alternating current extra-high voltage transformer | |
| CN109194132B (en) | Control method for high-frequency transformer temperature field test power supply topology | |
| CN204103487U (en) | The control circuit of electric power electric transformer | |
| CN104793116A (en) | Voltage withstand test device for large-capacity equipment | |
| CN108710043A (en) | A kind of relay protection vector checkout facility device using freq-variable electronic pressure regulator | |
| CN103499779A (en) | UHV (Ultra High Voltage) transformer field variable frequency partial discharge test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |