CN203561743U - Performance testing device for voltage transformer - Google Patents
Performance testing device for voltage transformer Download PDFInfo
- Publication number
- CN203561743U CN203561743U CN201320729117.4U CN201320729117U CN203561743U CN 203561743 U CN203561743 U CN 203561743U CN 201320729117 U CN201320729117 U CN 201320729117U CN 203561743 U CN203561743 U CN 203561743U
- Authority
- CN
- China
- Prior art keywords
- voltage
- transformer
- frequency
- power supply
- tested
- 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.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000005284 excitation Effects 0.000 abstract description 12
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to the unit testing field of high-voltage transformer products and particularly relates to a performance testing device for a voltage transformer, which is characterized by comprising a frequency-modulating and voltage-regulating power supply, an excitation transformer and a voltage sampler. During testing, the output end of the frequency-modulating and voltage-regulating power supply is connected with the input end of the excitation transformer. The output end of the excitation transformer is connected with the secondary side of a to-be-tested voltage transformer. The primary side of the to-be-tested voltage transformer is connected with the input end of the voltage transformer. The sampling end of the voltage sampler is connected with the input end of the voltage divider of the frequency-modulating and voltage-regulating power supply. The input end of the frequency-modulating and voltage-regulating power supply is connected with a 220V AC. The secondary side of the to-be-tested voltage transformer is connected with a voltmeter V and an ammeter A. Compared with the prior art, a large-size third-harmonic-generation power supply is replaced, so that the transportation cost of test equipment is reduced. Meanwhile, the test quality and the voltage waveform are improved. In addition, by means of the device, the ratio of transformation and the excitation characteristics can be measured and tested at a mains frequency. Therefore, the device is multi-purpose.
Description
Technical field
The utility model relates to the single test field of high voltage potential transformer product, relates in particular to a kind of performance testing device of voltage transformer (VT).
Background technology
In the single test of high voltage potential transformer, need to carry out the measurement of withstand voltage test and no-load voltage ratio measurement and excitation property, the induced over voltage withstand test of high voltage potential transformer adopts frequency tripling power supply conventionally, according to government test standard, voltage transformer (VT) induced test voltage is roughly considered by 2～3 times of maximum functional phase voltages.Because transformer is under rated frequency, rated voltage, iron core approaches saturated, if apply at tested Transformer Winding two ends the trial voltage that is greater than rated voltage with power frequency supply, open-circuit excitation electric current can sharply increase, reach not admissible degree, from the relational expression of induced potential, can find out, in order to apply the trial voltage that is greater than rated voltage, and don't make core sataration, can adopt the way that increases supply frequency, and variable-frequency power generation unit is heavy, be not easy to transportation, be not suitable for using at the scene, when capacity is little, waveform is also not so good.Three single transformers are connected into open delta by the form that once in parallel, secondary is connected, can obtain the power supply output of 150HZ, but waveform, capacity all can change along with load, and very easily occur and test specimen resonance, produce five times, the seventh harmonic, easily because resonance overvoltage damages test specimen.And the no-load voltage ratio performance of voltage transformer (VT) and excitation property are measured and need to just can be completed by no-load voltage ratio tacheometer with from lotus root pressure regulator, test process is loaded down with trivial details, and the cycle is long.
Summary of the invention
The purpose of this utility model is to provide a kind of performance testing device of voltage transformer (VT), using frequency modulation and voltage modulation power operation case as experiment power supply, in the process of the test of voltage transformer (VT), can be according to the withstand voltage standard setting maximum output voltage of voltage transformer (VT), then carry out no-load voltage ratio measurement, excitation property measurement, finally carry out variable frequency induction voltage-withstand test, improve testing efficiency.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of performance testing device of voltage transformer (VT), comprise frequency modulation and voltage modulation power supply, exciting transformer and voltage sample device, during test, frequency modulation and voltage modulation power output end is connected with the input end of exciting transformer, the output terminal of exciting transformer is connected with tested voltage transformer secondary side, tested voltage transformer (VT) primary side is connected with the input end of voltage sample device, the collection terminal of voltage sample device is connected with the voltage divider input end of frequency modulation and voltage modulation power supply, the input end of frequency modulation and voltage modulation power supply connects AC220V, the secondary side of tested voltage transformer (VT) connects respectively voltage table V and reometer A.
Described high frequency voltage controller power source is control box structure, is respectively equipped with output current demonstration, output voltage demonstration, high pressure indicated number, output frequency demonstration and adjusting pressuring knob and fm dial on it.
Prior art is compared, and the beneficial effects of the utility model are:
Replace bulky frequency tripling power supply, reduce testing equipment transportation cost, improve test mass, improve voltage waveform, avoid the interference of higher hamonic wave; In process of the test, also can complete no-load voltage ratio and excitation property measurement test in power frequency situation, realize a tractor serves several purposes; Overvoltage protection can be set, guarantee the device security of tested voltage transformer (VT); Equipment is light and handy, convenient in carrying, reduces labour cost and equipment conveying cost, increases work efficiency, reduces enterprise cost, has very strong practical value.
Accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
As shown in Figure 1, it is the performance testing device example structure schematic diagram of a kind of voltage transformer (VT) of the utility model, comprise frequency modulation and voltage modulation power supply, exciting transformer and voltage sample device, during test, frequency modulation and voltage modulation power output end is connected with the input end of exciting transformer, the output terminal of exciting transformer is connected with tested voltage transformer secondary side, tested voltage transformer (VT) primary side is connected with the input end of voltage sample device, the collection terminal of voltage sample device is connected with the voltage divider input end of frequency modulation and voltage modulation power supply, the input end of frequency modulation and voltage modulation power supply connects AC220V, the secondary side of tested voltage transformer (VT) connects respectively voltage table V and reometer A.High frequency voltage controller power source is control box structure, on it, be respectively equipped with output current demonstration, output voltage demonstration, high pressure indicated number, output frequency demonstration and adjusting pressuring knob and fm dial, its mesohigh indicated number be exactly the inductive voltage value of tested voltage transformer (VT) primary side.
Concrete operation step to the performance test of tested voltage transformer (VT) is as follows:
1) warning line has been drawn in testing ground, hang and " halt, Keep Clear-High Voltage " sign, frequency modulation and voltage modulation power output end is connected with the input end of exciting transformer, the output terminal of exciting transformer is connected with tested voltage transformer secondary side, tested voltage transformer (VT) primary side is connected with the input end of voltage sample device, the collection terminal of voltage sample device is connected with the voltage divider input end of frequency modulation and voltage modulation power supply, after confirming that connection is errorless, the power input of frequency modulation and voltage modulation power supply is connected to AC220V, the secondary side of tested voltage transformer (VT) connects respectively voltage table V and reometer A, according to the maximum output voltage of the withstand voltage standard frequency modulation and voltage modulation power supply of tested voltage transformer (VT), as the upper limit, control,
2) start frequency modulation and voltage modulation power supply, first its output voltage is adjusted to the arbitrary value (as 10V) below maximum output voltage, then its frequency is adjusted to 50Hz, records secondary side magnitude of voltage and the primary side magnitude of voltage of tested voltage transformer (VT), calculate the no-load voltage ratio value of tested voltage transformer (VT);
3) increase gradually the output voltage of frequency modulation and voltage modulation power supply, according to the regulation of test standard monitor respectively and record tested voltage transformer (VT) rated voltage 20%, 50%, 80%, 100%, 120% time exciting current (shown in reometer A), and the secondary side voltage of the tested voltage transformer (VT) of corresponding record (being shown in voltage table V), then draw the exciting characteristic curve of tested voltage transformer (VT), thereby complete the measurement of excitation property;
For tested voltage transformer (VT) neutral-point solid ground, electric pressure 35KV and following electric pressure, its highest measurement point is rated voltage 190%; For electric pressure 66KV and above voltage transformer (VT), its highest measurement point is 150%; Need to further choose measurement point and measure, to meet integrality and the precision of excitation curve;
4) output frequency of frequency modulation and voltage modulation power supply is risen to 150Hz, the output voltage that makes frequency modulation and voltage modulation power supply is (such as from 10V) gradually from low to high, carry out variable frequency induction withstand voltage test, increasing output voltage simultaneously, should note monitoring the exciting current of the secondary side of tested voltage transformer (VT), guarantee in allowed band, in process of the test, should determine test period according to test frequency, test period T=120 * 50/ test frequency, after having tested returns the voltage knob of frequency modulation and voltage modulation power supply zero-bit and finishes test;
If cannot guarantee, the exciting current of secondary side of tested voltage transformer (VT), in allowed band, should first reduce the output voltage of frequency modulation and voltage modulation power supply, then increase the frequency of frequency modulation and voltage modulation power supply, and then increase gradually output voltage, tested voltage transformer (VT) primary side induced voltage is directly proportional to frequency, magnetic flux, at magnetic flux, increases and is subject in limited time, completes induction withstand voltage by increase frequency, induced voltage E=4.44fW ф, in formula, f is frequency, the Hz of unit, and W is the number of turn, ф is magnetic flux, the Wb of unit;
5) off-test, should check the insulating property of tested voltage transformer (VT) again, determines that tested voltage transformer (VT) is intact.
If described step 4) cannot guarantee that the exciting current of secondary side of tested voltage transformer (VT), in allowed band, should first reduce the output voltage of frequency modulation and voltage modulation power supply, then increase the frequency of frequency modulation and voltage modulation power supply, and then increase gradually output voltage.
In described step 3), for tested voltage transformer (VT) neutral-point solid ground, electric pressure 35KV and following electric pressure, its highest measurement point is rated voltage 190%; For electric pressure 66KV and above voltage transformer (VT), its highest measurement point is 150%; Need to further choose measurement point and measure, to meet integrality and the precision of excitation curve.
In embodiment, voltage regulation and frequency modulation power supply can complete ceiling voltage and set, and can export the voltage signal of a frequency conversion, transformation, completes the monitoring to output voltage, frequency, output current and tested voltage transformer (VT) high pressure feedback simultaneously.Exciting transformer: it is input as 0～250V, is output as 0～600V, meets the requirement of tested voltage transformer secondary side field voltage.Voltage sample device: can monitor by dividing potential drop the induced voltage of tested voltage transformer (VT) primary side.Reometer A and voltage table V can monitor electric current and the voltage of tested voltage transformer secondary side, prevent the excessive damage Secondary Winding of exciting current.
Claims (2)
1. the performance testing device of a voltage transformer (VT), it is characterized in that, comprise frequency modulation and voltage modulation power supply, exciting transformer and voltage sample device, during test, frequency modulation and voltage modulation power output end is connected with the input end of exciting transformer, the output terminal of exciting transformer is connected with tested voltage transformer secondary side, tested voltage transformer (VT) primary side is connected with the input end of voltage sample device, the collection terminal of voltage sample device is connected with the voltage divider input end of frequency modulation and voltage modulation power supply, the input end of frequency modulation and voltage modulation power supply connects AC220V, the secondary side of tested voltage transformer (VT) connects respectively voltage table V and reometer A.
2. the performance testing device of a kind of voltage transformer (VT) according to claim 1, it is characterized in that, described high frequency voltage controller power source is control box structure, is respectively equipped with output current demonstration, output voltage demonstration, high pressure indicated number, output frequency demonstration and adjusting pressuring knob and fm dial on it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729117.4U CN203561743U (en) | 2013-11-14 | 2013-11-14 | Performance testing device for voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320729117.4U CN203561743U (en) | 2013-11-14 | 2013-11-14 | Performance testing device for voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203561743U true CN203561743U (en) | 2014-04-23 |
Family
ID=50511457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320729117.4U Expired - Lifetime CN203561743U (en) | 2013-11-14 | 2013-11-14 | Performance testing device for voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203561743U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935667A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting method for current transformer iron cores |
| CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | A kind of little output capacity Current Mutual Inductance no-load voltage ratio method of testing and device |
| CN112162230A (en) * | 2020-09-27 | 2021-01-01 | 国网山东省电力公司青州市供电公司 | On-spot check-up equipment of 10kV column switch voltage transformer |
-
2013
- 2013-11-14 CN CN201320729117.4U patent/CN203561743U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105935667A (en) * | 2016-05-31 | 2016-09-14 | 广西电网有限责任公司电力科学研究院 | Quick sorting method for current transformer iron cores |
| CN105935667B (en) * | 2016-05-31 | 2018-04-10 | 广西电网有限责任公司电力科学研究院 | A kind of quick method for separating of current transformer core |
| CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | A kind of little output capacity Current Mutual Inductance no-load voltage ratio method of testing and device |
| CN112162230A (en) * | 2020-09-27 | 2021-01-01 | 国网山东省电力公司青州市供电公司 | On-spot check-up equipment of 10kV column switch voltage transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103558573B (en) | A kind of performance test methods of voltage transformer (VT) | |
| CN105093140B (en) | A kind of method and its device of the detection of transformer remanent magnetism and demagnetization | |
| CN104181490B (en) | A kind of big current temporary state characteristic detection device of electronic current mutual inductor | |
| CN103439637B (en) | A kind of wave of oscillation production method for local discharge of electrical equipment test | |
| CN106872789A (en) | A kind of harmonic loss measurement apparatus of converter power transformer | |
| CN102621410B (en) | Test of adopting random waveform power supply to measure voltage current characteristics of mutual inductor and calculation method | |
| CN205608139U (en) | Change of current becomes partial discharge test device | |
| CN102692577A (en) | Test system for large-power high-frequency transformer | |
| CN203561743U (en) | Performance testing device for voltage transformer | |
| CN202189115U (en) | Portable frequency conversion induction high-voltage tester | |
| CN102043139B (en) | Calibration device of current transformer and method for calibrating current transformer by using same | |
| CN201298061Y (en) | Alternating-current frequency conversion resonant vibration overpressure resistant device | |
| CN101403784B (en) | AC frequency conversion resonance vibration pressure-proof device for AC motor stator winding, and method therefor | |
| CN203551765U (en) | Zero load on-site electric energy meter testing device | |
| CN105842556B (en) | A kind of parallel single-phase capacitor-discharge coil discharge process calculation method | |
| CN201955433U (en) | Induction withstand voltage tester for pure-capacitive electromagnetic voltage transformer | |
| CN101545963A (en) | High-performance current transformer intelligent analyzer | |
| CN203310941U (en) | Overvoltage test loop of power capacitor | |
| CN102269786A (en) | Load testing device for triple-frequency transformer | |
| CN206892261U (en) | A kind of alternating-current voltage resistance test device for overhead transmission line | |
| CN205229335U (en) | Voltage transformer excitation characteristic test device | |
| CN203811755U (en) | A testing apparatus used for a triple-frequency withstand voltage test for a voltage transformer | |
| CN103487705A (en) | Quality control method for excitation characteristics of C-type iron core voltage transformer | |
| CN108375750B (en) | Electromagnetic voltage transformer induction voltage withstand and partial discharge test device and method | |
| CN203178376U (en) | Intelligent distribution transformer load test apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |