CN209486281U - A kind of three-phase mutual inductor simulation linked network detection system - Google Patents
A kind of three-phase mutual inductor simulation linked network detection system Download PDFInfo
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- CN209486281U CN209486281U CN201821902568.2U CN201821902568U CN209486281U CN 209486281 U CN209486281 U CN 209486281U CN 201821902568 U CN201821902568 U CN 201821902568U CN 209486281 U CN209486281 U CN 209486281U
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Abstract
The utility model discloses a kind of three-phase mutual inductors to simulate linked network detection system; including threephase switch protection location, three-phase regulator, booster, switch protector, three-phase voltage/current standard circuit and three-phase/single-phase test product; the threephase switch protection location connects three-phase regulator; three-phase regulator is also connected with booster; booster is also connected with switch protector; switch protector is also connected with three-phase voltage/current standard circuit, and three-phase voltage/current standard circuit is also connected with three-phase/single-phase test product.The utility model can be in mutual inductor actual moving process, when the voltage and current parameter of Assembled metering mutual inductor changes, as curent change changes influence to the accuracy between electric current and the voltage and current of three-phase to voltage, voltage change；And under the alternate abnormal power supply occurred by simulation power circuit and mutual inductor extreme operating condition, mutual inductor operating parameter changes, the verifying to mutual inductor operation guarantee ability.
Description
Technical field
The utility model relates to transformer technical field, specifically a kind of three-phase mutual inductor simulates linked network detection system.
Background technique
Mutual inductor is one of the core equipment in electric system, by power circuit high current, high voltage signal according to
Defined accuracy is converted to low current, low voltage signal, provides secondary device use.Its main function be electrical energy measurement,
Measurement, protection and control, isolation and standardization.As the sensing element being widely used on power circuit, when due to operation
When the operating parameter of mutual inductor itself or power circuit changes, the working condition of mutual inductor will be directly influenced, is occurred
Mutual inductor metering inaccuracy, transducing signal deviation cause switch to malfunction, will directly affect mutual inductor operational safety, serious conditions
Lower breakdown will lead to power grid paralysis.
Wuhan high pressure is netted by the existing accuracy test to electric power mutual-inductor in China, including such as national electric appliance state, national authority department
Research institute, Xi'an high pressure research institute, Suzhou DianKeYuan etc., the tester used are single-phase measurement.For actual use in
The precision of the single-phase transformers or three-phase mutual inductor of AC three-phase, measurement does not just account for influencing each other yet.Although state
Family standard GB20840.4 three-phase mutual inductor in also provide, alternate applications high tension voltage to detect current error influence amount,
Apply electric current to detection voltage error influence amount, is also limited to the influence of single-phase error detection, three-phase difference shape is not provided
Error under state influences and compares online.
According to the routine test and pattern examination in the project of national Specification electric power mutual-inductor test, for manufacturing firm
It tests and provides, but practical mutual inductor running environment can not be verified completely in the project.As mutual inductor operates in electricity
In the state that line of force road is faulty, for different line fault, the reflected electrical parameter of mutual inductor is not also identical, Ke Yibang
Operation maintenance personnel is helped fast and effectively to debug；The for another example existing defects inside mutual inductor, in the operation of normal electricity route, mutually
The electrical parameter and mutual inductor that sensor is reflected run the phenomenon that damage.
The error-detecting of mutual inductor three-phase, interphase interference test and offer simulation on-line operation system as a result, for existing
The mutual inductor detection and test that three-phase electrical power system uses more fully are supplemented.
Utility model content
The purpose of this utility model is to provide a kind of three-phase mutual inductors to simulate linked network detection system, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the utility model provides the following technical solutions:
A kind of three-phase mutual inductor simulation linked network detection system, including threephase switch protection location, three-phase regulator, boosting
Device, switch protector, three-phase voltage/current standard circuit and three-phase/single-phase test product, the threephase switch protection location connection
Three-phase regulator, three-phase regulator are also connected with booster, and booster is also connected with switch protector, and switch protector is also connected with three-phase
Voltage/current preferred circuit, three-phase voltage/current standard circuit are also connected with three-phase/single-phase test product.
Further technical solution as the utility model: the threephase switch protection location include A.C. contactor KM and
Circuit breaker Q F.
Further technical solution as the utility model: the three-phase regulator is potentiometer TK.
Further technical solution as the utility model: the booster is current transformer T.
Compared with prior art, the utility model has the beneficial effects that the high pressure of 1, three-phase hanging net operation test is not
Directly on high-tension line, but low pressure mains-supplied is used, generates high-voltage test electric power, test effect is identical and safety can
It leans on.
2, the high pressure generated can be adjusted arbitrarily, realized different high-voltage tests, be not limited to conventional voltage grade (such as 10
Or 20kV), voltage can be tested in other any 0-20kV.
3, the following low current of three-phase 20kV can be provided directly by transformer, and high current can be occurred by low-tension current
Device grafting produces high-voltage great-current offer, to realize the examination of the following mutual inductor of different capabilities 20kV in high tension voltage route
It tests.
4, easy simulating grid operation phase shortage, ground connection most common failure state, dismount a fusion tube.
5, the temperature rise tests such as 20kV or less voltage transformer load capacity, limit load can provide actual motion state
Under test data product design and result verification are provided.
6, temperature rise test is run under the rated current of 20kV or less current transformer and voltage, actual response goes out actual motion
Test data under state, not using the data of low-tension current test.
Detailed description of the invention
Fig. 1 is the overall block diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of three-phase mutual inductor simulates linked network detection system, including threephase switch protection location, three-phase tune
Depressor, booster, switch protector, three-phase voltage/current standard circuit and three-phase/single-phase test product, the threephase switch protection
Unit connects three-phase regulator, and three-phase regulator is also connected with booster, and booster is also connected with switch protector, and switch protector is also
Three-phase voltage/current standard circuit is connected, three-phase voltage/current standard circuit is also connected with three-phase/single-phase test product.
Threephase switch protection location includes A.C. contactor KM and circuit breaker Q F.Three-phase regulator is potentiometer TK.Boosting
Device is current transformer T.
The working principle of the utility model is: 1, three-phase mushing error is tested:
Transformer error tester is detected using single-phase at present, when such as current transformer error verification, no
It is low pressure or middle pressure mutual inductor by mutual inductor, is all that high current is generated by current lifting device, applies low pressure in test item primary side
Primary current, while standard current transformer is flowed into, realization is compared by the electric current that test item and standard export.For
This detection method is compared with practical operation situation, there is gap, the voltage used first as it is middle pressure or more when if surpass
0.4kV is crossed, secondly electromagnetic field effects factor, for conventional electromagnetic formula product in three-phase line, detects phase normal power-up, and
Other two-phases are not powered, and running environment and actual use be not also identical, and the result detected in this way can not correct response.
It is connected the line when transformer error detects according to ct calibrating regulation by the use of patented product, adjusts and rise
It flows device electric current or adjusts voltage generation circuit, directly read error on three-phase tester.To easily realize detection three-phase
Electric current and the error and three-phase current of error result or mutual inductor when true environment is run under voltage different situations
Variation with the interphase interference of voltage to error.Such as detection current error when, can single-phase applications current detecting error, observe
The influence of three-phase current；It can also be seen that tested mutual inductor operating voltage changes the influence to current error.Such as detection voltage
When error, single-phase it can apply voltage detection error, shadow of the observation voltage between phases variation to tested phase transformer error with three-phase
It rings；It can also be seen that tested mutual inductor operating current changes the influence to voltage error.
2, mutual inductor operating analysis when route is various abnormal:
For high-voltage mutual inductor operate in power circuit it is faulty in the state of, such as three-phase lack phase power supply, single-phase earthing
Different line fault, mutual inductor are converted to carry out voltage and current parameter also not identical.It is researched and analysed in terms of to such phenomenological theory
It is very much, also can not failure reproduction but due to once break down, needing to solve as early as possible in actual use.Therefore in this way
This binding isotherm can not be analyzed, it is even more impossible to simulated failure phenomenons to give training.
It can then be realized easily by the use of patented product, such as need to simulate phase-deficient operation, need to only pull up sub-high pressure guarantor
Protect fusion tube, the i.e. single-phase operation of any phase of analog, two-phase operation situation after phase shortage.Such as need to simulate singlephase earth fault fortune
Row only need to directly touch any phase high-voltage busbar with grounding rod, or ground line is connected to any phase high-voltage busbar, i.e. analog
It has high-voltage earthing failure and metallic earthing failure.These simulated experiments are provided, are combined with the theoretical analysis of, electric system can be helped
Operation maintenance personnel is fast and effectively debugged.
3, mutual inductor load capacity and abnormal test analysis:
The temperature rise tests such as voltage transformer load capacity, limit load, the test to that can provide under actual motion state
Data provide product design and result verification.Respective load is connected in secondary terminals side according to transformer parameter, system is primary
Voltage gradually boosts to test voltage, carries out temperature rise test according to the national Specification time.
When occurring abnormal in mutual inductor manufacturing process, the enameled wire epidermis of a such as secondary coil is knocked against hard, and coil is caused to insulate
Short circuit etc. between local damage and the bad lamination of fabrication of iron core, by simulation on-line operation test, above-mentioned mutual inductor is original
Making bad point will gradually expand, and be occurred as soon as the serious destruction of insulation or even product explosion after a period of time.It is simulated by these
Test shoots the arrow at the target to the control of mutual inductor quality point.
Under normal circumstances, operation temperature rise test is done to current transformer by domestic testing agency, no matter mutual inductor uses electricity
Pressure is high pressure or low pressure, is all primary to mutual inductor secondary or passes to low-tension current and carry out temperature rise test, and there is no very in this way
The data under actual operating mode are reflected in fact.
It can then be realized easily by the use of patented product, directly apply the rated current of current transformer, while one
Secondary side can apply 20kV or less operating voltage, realize to running temperature rise test, the examination that actual response goes out under actual motion state
Data are tested, not using the data of low-tension current test.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (4)
1. a kind of three-phase mutual inductor simulates linked network detection system, including threephase switch protection location, three-phase regulator, booster,
Switch protector, three-phase voltage/current standard circuit and three-phase/single-phase test product, which is characterized in that the threephase switch protection is single
Member connection three-phase regulator, three-phase regulator are also connected with booster, and booster is also connected with switch protector, and switch protector also connects
Three-phase voltage/current standard circuit is connect, three-phase voltage/current standard circuit is also connected with three-phase/single-phase test product.
2. a kind of three-phase mutual inductor according to claim 1 simulates linked network detection system, which is characterized in that the three-phase is opened
Closing protection location includes A.C. contactor KM and circuit breaker Q F.
3. a kind of three-phase mutual inductor according to claim 1 simulates linked network detection system, which is characterized in that the three-phase tune
Depressor is potentiometer TK.
4. a kind of three-phase mutual inductor according to claim 1 simulates linked network detection system, which is characterized in that the booster
For current transformer T.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820306228 | 2018-03-06 | ||
| CN2018203062287 | 2018-03-06 |
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| Publication Number | Publication Date |
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| CN209486281U true CN209486281U (en) | 2019-10-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257818A (en) * | 2020-03-06 | 2020-06-09 | 云南电网有限责任公司电力科学研究院 | Metering performance verification system and method of combined metering device for distribution network |
-
2018
- 2018-11-19 CN CN201821902568.2U patent/CN209486281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257818A (en) * | 2020-03-06 | 2020-06-09 | 云南电网有限责任公司电力科学研究院 | Metering performance verification system and method of combined metering device for distribution network |
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Address after: No. 8, Jingtian Road, Jiangshan Economic Development Zone, Jiangshan City, Quzhou City, Zhejiang Province 324102 Patentee after: Zhejiang Tianji Instrument Transformer Co.,Ltd. Address before: No. 2, Shanhai Road, Shanhai Cooperation Zone, Jiangshan Economic Development Zone, Quzhou City, Zhejiang Province, 324123 Patentee before: ZHEJIANG HORIZON INSTRUMENT TRANSFORMERS Co.,Ltd. |