CN203519749U - Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test - Google Patents
Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test Download PDFInfo
- Publication number
- CN203519749U CN203519749U CN201320684569.5U CN201320684569U CN203519749U CN 203519749 U CN203519749 U CN 203519749U CN 201320684569 U CN201320684569 U CN 201320684569U CN 203519749 U CN203519749 U CN 203519749U
- Authority
- CN
- China
- Prior art keywords
- voltage
- transformer
- frequency
- test
- extra
- 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 51
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 35
- 238000001914 filtration Methods 0.000 claims description 12
- 238000002474 experimental method Methods 0.000 claims description 8
- 238000004082 amperometric method Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012913 prioritisation Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Abstract
A frequency-conversion voltage-regulation device for an extra-high voltage large transformer no-load test comprises a sequentially-connected test power source and a boosting transformer (3), the output end of which is connected with a transformer to be tested (4). The frequency-conversion voltage-regulation device is characterized in that the input end of the transformer to be tested (4) is in parallel connection with a group of or a plurality of high-voltage filters (3); and the test power source is a high-voltage frequency-conversion voltage-regulation power source (1). Compared with the prior art, the frequency-conversion voltage-regulation device fully utilizes the advantage that the frequency and voltage of the high-power high-voltage frequency-conversion voltage-regulation power source can be regulated independently and collects test currents and voltage waveforms in real time to perform frequency conversion voltage regulation, thereby effectively reducing the capacity of test devices needed, improving waveform of a test voltage, and providing a new effective testing technique for the extra-high voltage large transformer field test.
Description
Technical field
The utility model provides a kind of transformer field test unit, is a kind of frequency conversion voltage adjusting device of extra-high voltage high-power transformer no-load test specifically.
Background technology
Large-scale power transformer is one of equipment most important, the most expensive in power transmission and transformation system, and its reliability is directly connected to power system safety and stability operation.Especially in extra-high voltage alternating current-direct current engineering, high-power transformer is as the core of power transmission and transformation system, and status is particularly important.
Before transformer dispatches from the factory or overhaul puts into operation, need carry out on-the-spot no-load test.No-load test can effectively be checked transformer core and inherent vice, is the important technical of evaluating transformer safety, economy, stable operation.Because extra-high voltage transformer volume weight is huge, be difficult for transportation, for saving transportation cost, field for Large Transformer assembling site test will replace the pattern of assembling finished product transportation in traditional factory gradually.
But Assembling site test is also brought new problem, extra-high voltage transformer capacity is large, and electric pressure is high, site test difficulty.Especially in No-load Test of Transformer, after voltage rising core sataration, no-load current sharply increases, and very easily causes trial voltage to reduce and voltage waveform distortion, is difficult to the test of having boosted.Test unit capacity increases, and can reduce the distortion of voltage waveform; But test unit capacity increases, and volume weight is multiplied, and is difficult to rig-site utilization.
At present, the no-load test of high-power transformer mainly adopts two schemes: synchronous generator unit and pressure regulator.Investment on generating unit is huge, reuses difficulty, is difficult to rig-site utilization.It is larger that pressure regulator is affected by power network fluctuation, generally needs compensation just can complete zero load and boost; Conventional compensatory approach is switching high-voltage capacitance after core sataration, to compensate the perceptual weight sharply increasing in no-load current.For extra-high voltage transformer, in no-load test, switching high-voltage capacitance easily produces transient overvoltage, jeopardizes equipment.For extra-high voltage high-power transformer, these test methods are difficult to solve the contradiction demand between test unit capacity and trial voltage waveform, are all not suitable for extra-high voltage transformer site test.
Therefore, need the practicable extra-high voltage field for Large Transformer test method of research, for completing the especially unloaded pressure build-up test of extra-high voltage transformer site test, provide a kind of new solution route, for the construction mode of extra-high voltage equipment Assembling site test provides technical support.
Summary of the invention
For solving the problems referred to above of prior art existence, a kind of frequency conversion voltage adjusting device of extra-high voltage high-power transformer no-load test has been proposed.
The frequency conversion voltage adjusting device of described extra-high voltage high-power transformer no-load test, comprise the experiment power supply connecting successively and the step-up transformer of exporting the tested transformer of termination, it is characterized in that: the input end of described tested transformer is connected in parallel to one or more groups hv filtering device, described experiment power supply is high-pressure frequency-conversion voltage controller power source, described hv filtering device is RLC series filter, as the unique filtered version that is connected in parallel on tested transformer input end, for filtering higher hamonic wave.
Clear and definite in this programme, at the input end of tested transformer, containing the capacitance compensation beyond RLC series filter, exempted the risk of the transient overvoltage that the interim switching of capacitance compensation brings.
The new edition power industry compulsory standard < < electrical safe working order > > regulation of national grid issue: electric pressure 1000V and above be high voltage electric equipment.
As prioritization scheme, the input end of described tested transformer is connected with voltage transformer (VT) summation current transformer, and described voltage transformer (VT) summation current transformer is connected to respectively Regulation Control end and the frequency modulation control end of described high-pressure frequency-conversion voltage controller power source by voltage analysis comparison module and amperometry comparison module.
In this test loop, high-pressure frequency-conversion voltage controller power source produces the required voltage of test, after intermediate transformer boosts, is added in tested transformer two ends; Tested transformer two ends parallel high voltage wave filter, to compensate no-load current, improves voltage waveform.
The utility model can the tested transformer of Real-time Collection no-load test voltage and test current, and the no-load test voltage, the electric current that collect are compared in real time, and output voltage and the frequency of controlling high-power frequency conversion voltage adjusting power supply rise.When output voltage rises to test required voltage, then frequency adjustment is carried out to the measurement of all kinds of parameters to 50Hz.Whole process is " frequency conversion voltage adjusting ".
In the extra-high voltage field for Large Transformer no-load test loop consisting of supply unit, hv filtering device, during iron core unsaturation, wave filter is as impedance loop electric consumption capacity; During core sataration, wave filter compensation no-load current reduces power supply capacity.Described supply unit connects intermediate transformer by high-power frequency conversion voltage adjusting power supply and forms.For fully reducing power supply capacity, frequency conversion voltage adjusting thought is proposed, from lower initial frequency, start to boost, in the process of boosting, progressively increase frequency, make the loop will be saturated but unsaturated the optimal compensation state in iron core.
The utility model advantage is compared to existing technology, make full use of the advantage of high-power high voltage frequency conversion voltage adjusting supply frequency voltage energy independent regulation, Real-time Collection test current, voltage waveform, carry out frequency conversion voltage adjusting, effectively reduce required test unit capacity, improve trial voltage waveform, for the test of extra-high voltage field for Large Transformer provides new effective experimental technique.
Accompanying drawing explanation
Fig. 1 is extra-high voltage field for Large Transformer test major loop structure figure,
Fig. 2 is that test unit frequency f is with the variation relation figure of trial voltage U.
In figure: 1-high-pressure frequency-conversion voltage controller power source, 2-step-up transformer, 3-hv filtering device, 4-tested transformer, 5-current transformer, 6-voltage transformer (VT), 7-amperometry comparison module, 8-voltage analysis comparison module, 9-test power device.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated: as shown in fig. 1, the frequency conversion voltage adjusting device of described extra-high voltage high-power transformer no-load test, comprise the experiment power supply connecting successively and the step-up transformer 3 of exporting the tested transformer 4 of termination, the input end of described tested transformer 4 is connected in parallel to one or more groups hv filtering device 3, and described experiment power supply is high-pressure frequency-conversion voltage controller power source 1.As prioritization scheme, described hv filtering device 3 is RLC series filters.
As prioritization scheme, the input end of described tested transformer 4 is connected with voltage transformer (VT) 6 summation current transformers 5, and described voltage transformer (VT) 6 summation current transformers 5 are connected to respectively Regulation Control end and the frequency modulation control end of described high-pressure frequency-conversion voltage controller power source 1 by voltage analysis comparison module 8 and amperometry comparison module 7.
Frequency conversion voltage adjusting device gathers the signal of tested transformer 4, controls output voltage and the frequency of high-pressure frequency-conversion voltage controller power source 1, makes output voltage and frequency be " notch cuttype " and rises, and " notch cuttype " variation relation as shown in Figure 2.
Step-up transformer is high-power transformer, and the high-tension effect that hoists in loop jointly forms the required high voltage of test together with high-power frequency conversion voltage adjusting power supply.
Hv filtering device is passive filter, resistance, electric capacity, inductance element, consists of.The major function of wave filter is when core sataration no-load current distorts, and compensates perceptual fundamental current, filtering harmonic current, and then improve trial voltage waveform.
Frequency conversion voltage adjusting device consists of signal gathering unit and control output unit two parts, signal acquisition module comprises voltage transformer (VT) summation current transformer, voltage transformer (VT) is connected in parallel on tested transformer pressurization winding two ends, for the trial voltage on the tested transformer of Real-Time Monitoring; Current transformer is connected in loop, for monitoring no-load current.Control output unit and comprise voltage analysis comparison module 8 and amperometry comparison module 7, whether the no-load test voltage collecting is reached to the highest trial voltage, whether occur significantly rising with the electric current collecting and carry out real-time comparative analysis, and output voltage and the frequency of controlling high-power frequency conversion voltage adjusting power supply are " notch cuttype " and rise.Be specially: 1) at initial frequency f
0under, control output voltage and at the uniform velocity rise; 2) when amperometry comparison module 7 monitors no-load current and sharply rises, keep voltage constant, control output frequency and make it to increase by one and increase progressively frequency △ f; 3) in frequency, be f
0during+△ f, continue to boost, and Real-Time Monitoring no-load current, when electric current sharply rises again, repeat 2) and 3).Finally, when voltage analysis comparison module 8 judgement output voltages rise to test required voltage, then frequency adjustment is carried out to the measurement of all kinds of parameters to 50Hz.Whole process is " frequency conversion voltage adjusting ", and output voltage and frequency are " notch cuttype " rising variation relation.
Advantage of the present utility model is to take the method for " notch cuttype " frequency conversion voltage adjusting, in the situation that guaranteeing that the process of boosting completes smoothly, significantly reduce the required experiment power supply capacity of extra-high voltage high-power transformer no-load test, and then effectively promote extra-high voltage transformer site test technology and install to integrated, miniaturization, practical future development.
Claims (2)
1. the frequency conversion voltage adjusting device of an extra-high voltage high-power transformer no-load test, comprise the experiment power supply connecting successively and the step-up transformer (3) of exporting the tested transformer of termination (4), it is characterized in that: the input end of described tested transformer (4) is connected in parallel to one or more groups hv filtering device (3), described experiment power supply is high-pressure frequency-conversion voltage controller power source (1), described hv filtering device (3) is RLC series filter, as the unique filtered version that is connected in parallel on tested transformer input end, for filtering higher hamonic wave.
2. the frequency conversion voltage adjusting device of extra-high voltage high-power transformer no-load test according to claim 1, it is characterized in that: the input end of described tested transformer (4) is connected with voltage transformer (VT) (6) summation current transformer (5), described voltage transformer (VT) (6) summation current transformer (5) is connected to respectively Regulation Control end and the frequency modulation control end of described high-pressure frequency-conversion voltage controller power source (1) by voltage analysis comparison module (8) and amperometry comparison module (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684569.5U CN203519749U (en) | 2013-10-31 | 2013-10-31 | Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320684569.5U CN203519749U (en) | 2013-10-31 | 2013-10-31 | Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203519749U true CN203519749U (en) | 2014-04-02 |
Family
ID=50378663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320684569.5U Expired - Lifetime CN203519749U (en) | 2013-10-31 | 2013-10-31 | Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203519749U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297605A (en) * | 2014-10-30 | 2015-01-21 | 云南省送变电工程公司 | Ultrahigh-voltage live-working insulation safety instrument test system and method |
| CN105182103A (en) * | 2015-07-21 | 2015-12-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer symmetrical voltage boosting no-load test circuit |
| CN109188071A (en) * | 2018-10-22 | 2019-01-11 | 国网电力科学研究院武汉南瑞有限责任公司 | Vehicular power transformer sky, load loss on-site test system and method |
-
2013
- 2013-10-31 CN CN201320684569.5U patent/CN203519749U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297605A (en) * | 2014-10-30 | 2015-01-21 | 云南省送变电工程公司 | Ultrahigh-voltage live-working insulation safety instrument test system and method |
| CN104297605B (en) * | 2014-10-30 | 2017-04-19 | 云南省送变电工程公司 | Ultrahigh-voltage live-working insulation safety instrument test system and method |
| CN105182103A (en) * | 2015-07-21 | 2015-12-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Converter transformer symmetrical voltage boosting no-load test circuit |
| CN109188071A (en) * | 2018-10-22 | 2019-01-11 | 国网电力科学研究院武汉南瑞有限责任公司 | Vehicular power transformer sky, load loss on-site test system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203535143U (en) | A large transformer field test integrated apparatus based on a frequency-converting and voltage-adjusting power supply | |
| CN101557116B (en) | Environment-friendly and energy-saving DC power station | |
| CN103427425B (en) | Coordinated control device and method for MMC (modular multilevel converter) type unified power quality conditioner | |
| CN102142779A (en) | Novel transformer test power supply | |
| CN109104097B (en) | High-frequency transformer operation test device | |
| CN206038836U (en) | Series resonance high -voltage insulation test device | |
| CN103543361B (en) | The extra-high voltage field for Large Transformer no-load test method of frequency conversion voltage adjusting | |
| CN104065279A (en) | Voltage disturbance generation device and method for simulating power grid disturbance | |
| CN203519749U (en) | Frequency-conversion voltage-regulation device for extra-high voltage large transformer no-load test | |
| CN103475242A (en) | Plasma high frequency high voltage power supply | |
| CN103094918B (en) | A kind of single-phase grid-connected device improving the quality of power supply | |
| CN104300827A (en) | 2,400kV/30mA movable partial-discharge-free direct-current high-voltage generator | |
| CN106856373B (en) | Harmonic generation device | |
| CN203759189U (en) | Ultra-large-capacity high-voltage variable frequency resonant cable voltage withstanding test device | |
| CN103543362B (en) | The choosing method of extra-high voltage transformer no-load test median filter | |
| CN102857119A (en) | Wideband transform-up detection power supply for current transformers | |
| CN102931682B (en) | Carrier frequency conversion control method | |
| CN102375110A (en) | Comprehensive automatic control console for alternating-current voltage withstand test | |
| CN203340031U (en) | Power frequency inductance regulation resonance device | |
| CN103076514A (en) | Sound level measuring test method for dry-type smoothing reactor | |
| CN103809095A (en) | Withstand voltage test device for ultra-large-capacity high-voltage variable-frequency resonant cable | |
| CN210806745U (en) | Movable compact type on-site high-voltage test device | |
| CN204408202U (en) | The power source special of composite electromagnetic constraint vibration device | |
| CN207452029U (en) | The intelligent efficient electro-desalting control system of multifrequency multivoltage | |
| CN201994857U (en) | Novel testing power supply of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |