CN107356895A - High-tension current inductor error measuring system - Google Patents
High-tension current inductor error measuring system Download PDFInfo
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- CN107356895A CN107356895A CN201710754588.3A CN201710754588A CN107356895A CN 107356895 A CN107356895 A CN 107356895A CN 201710754588 A CN201710754588 A CN 201710754588A CN 107356895 A CN107356895 A CN 107356895A
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- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 8
- 230000005693 optoelectronics Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The present invention relates to a kind of high-tension current inductor error measuring system, including a liter source device, high voltage standard current transformer device and error measuring means, rise source device connection high voltage standard current transformer device and tested high-tension current inductor, error measuring means connection high voltage standard current transformer device and tested high-tension current inductor；Rise source device and export high pressure to high pressure standard current transformer device and the primary side of tested high-tension current inductor, current signal to error measuring means, the error measuring means that high voltage standard current transformer device and tested high-tension current inductor export secondary side respectively obtains the error amount of tested high-tension current inductor according to the current signal of the secondary side of reception.Obtained in a high voltage state because error works in high voltage standard current transformer device and tested high-tension current inductor, therefore can be high as the tested error of high-tension current inductor in a high voltage state, measurement accuracy.
Description
Technical field
The present invention relates to error detecting technology field, more particularly to a kind of high-tension current inductor error measuring system.
Background technology
Current transformer is the equipment for the size conversion that electric current is carried out according to electromagnetic induction principle, by the iron core that closes with around
Group composition.In general the umber of turn of the primary side of current transformer is few, secondary side umber of turn is relatively more, can will once
The high current of side is converted into the low current of secondary side.Current transformer is during primary side current is converted to secondary side current
Error is inevitably introduced, and is the accuracy for ensureing electric current conversion, current transformer needs measurement to miss before coming into operation
The qualified current transformer of poor size, only gauging error can come into operation.
In actual motion, the current transformer of different voltage class is applied in the power system of different voltage class,
For example high-tension current inductor is used in high-voltage electric power system, low-voltage current mutual inductor is used in low-voltage power system.Traditional
To current transformer carry out error measure mode be, no matter the current transformer of which kind of voltage class, its error testing process
Carry out in a low voltage state.High pressure conditions are operated in however, for high-tension current inductor, during its actual motion
Under, influence of the different voltage class to error caused by current transformer is different, is represented with the error measured under low-pressure state
Error in high-tension current inductor practical work process, accuracy are low.
The content of the invention
Based on this, it is necessary to for high-tension current inductor error measure accuracy it is low the problem of, there is provided one kind measurement is accurate
The high high-tension current inductor error measuring system of true property.
A kind of high-tension current inductor error measuring system, including liter source device, high voltage standard current transformer device and
Error measuring means, described liter of source device connect the high voltage standard current transformer device and tested high-tension current inductor,
The error measuring means connects the high voltage standard current transformer device and the tested high-tension current inductor；
Primary side and the tested height of the described liter of source device output high pressure to the high voltage standard current transformer device
The primary side of voltage current transformer, the high voltage standard current transformer device and the tested high-tension current inductor difference are defeated
Go out the current signal of secondary side to the error measuring means, the error measuring means is according to the high voltage standard Current Mutual Inductance
The current signal of device device and the respective secondary side of tested high-tension current inductor obtains the tested high-tension current mutual inductance
The error amount of device.
Above-mentioned high-tension current inductor error measuring system, using high voltage standard current transformer device as canonical reference
Object, primary side and tested high-tension current inductor of the high pressure to high pressure standard current transformer device are exported by liter source device
Primary side so that high voltage standard current transformer device and tested high-tension current inductor work in a high voltage state, by
Error measuring means receives the electric current of high voltage standard current transformer device and the respective secondary side of tested high-tension current inductor
Signal and the error amount for obtaining tested high-tension current inductor.Because error is in high voltage standard current transformer device and is tested
High-tension current inductor works what is obtained in a high voltage state, therefore can be used as tested high-tension current inductor in high pressure shape
Error under state, measurement accuracy are high.
Brief description of the drawings
Fig. 1 is the structure chart of an embodiment mesohigh current transformer error measuring system；
Fig. 2 is the structure chart of another embodiment mesohigh current transformer error measuring system.
Embodiment
With reference to figure 1, the high-tension current inductor error measuring system in an embodiment, including liter source device 110, high pressure mark
Quasi- current transformer device 120 and error measuring means 130, rise source device 110 and connect high voltage standard current transformer device 120
With tested high-tension current inductor 200, error measuring means 130 connects high voltage standard current transformer device 120 and tested height
Voltage current transformer 200.Wherein, be tested high-tension current inductor 200 be need measurement error be applied to high-voltage electric power system
Current transformer.
Rise source device 110 and export primary side and tested high-tension current of the high pressure to high pressure standard current transformer device 120
The primary side of transformer 200, high voltage standard current transformer device 120 and tested high-tension current inductor 200 export two respectively
The current signal of secondary side is to error measuring means 130.Wherein, high pressure refers to corresponding in high pressure specified in power industry, i.e. high pressure
Magnitude of voltage be more than or equal to setting.For example for alternating current, the voltage more than 1000 volts is high pressure, less than 1000
The voltage of volt is low pressure, and for direct current, the voltage more than 1500 volts is high pressure, and the voltage less than 1500 volts is low
Pressure.Typically in error-detecting is low tension feed unit, and specifically, liter source device 110 can connect low tension feed unit and enter
High pressure is exported after row boosting to the primary side and tested high-tension current inductor 200 of high pressure standard current transformer device 120
Primary side so that high voltage standard current transformer device 120 and tested high-tension current inductor 200 work in a high voltage state.
Error measuring means 130 is each according to high voltage standard current transformer device 120 and tested high-tension current inductor 200
From the current signal of secondary side obtain the error amount of tested high-tension current inductor.High voltage standard current transformer device 120
As the canonical reference object of tested high-tension current inductor, error measuring means 130 can fill high voltage standard current transformer
Parameter corresponding to putting the current signal of the secondary side of 120 and tested high-tension current inductor 200 is compared analyzing and processing, with
To error.
Above-mentioned high-tension current inductor error measuring system, standard is used as using high voltage standard current transformer device 120
References object, primary side and tested high pressure of the high pressure to high pressure standard current transformer device 120 are exported by liter source device 110
The primary side of current transformer 200 so that high voltage standard current transformer device 120 and tested high-tension current inductor 200 are equal
Work in a high voltage state, high voltage standard current transformer device 120 and tested high-tension current is received by error measuring means 130
The current signal of 200 respective secondary side of transformer and the error amount for obtaining tested high-tension current inductor 200.Because error is
Work what is obtained in a high voltage state in high voltage standard current transformer device 120 and tested high-tension current inductor 200, because
This can be high as the tested error of high-tension current inductor 200 in a high voltage state, measurement accuracy.
In one embodiment, the specified electricity that the high pressure that source device 110 exports is equal to tested high-tension current inductor 200 is risen
Pressure.That is, source device 110 is risen the voltage of input is risen into the rated voltage of tested high-tension current inductor 200 and exported to high pressure
Standard current transformer device 120 and tested high-tension current inductor 200.In this way, high voltage standard current transformer device can be made
120 and tested high-tension current inductor 200 be operated under the rated voltage state of tested high-tension current inductor 200, measure
The error accuracy arrived is high.It is appreciated that in other embodiments, it can also be other electricity to rise the high pressure that source device 110 exports
Pressure value.
In one embodiment, with reference to figure 2, rising source device 110 includes booster 111 and current lifting device 112, the He of booster 111
The input connection low tension feed unit (not shown) of current lifting device 112, booster 111 connect height with the output end of current lifting device 112
Press standard current transformer device 120 and tested high-tension current inductor 200.
Booster 111 is used to boost to the voltage of low tension feed unit output, and current lifting device 112 is used for low-voltage power supply
The electric current of device output is flowed up；By using booster 111 and current lifting device 112 to export high pressure to high pressure standard electric simultaneously
Current transformer device 120 and tested high-tension current inductor 200, the high-voltage great-current state in actual motion is simulated, effect is more
It is good.
In one embodiment, with continued reference to Fig. 2, it is mutual that high voltage standard current transformer device 120 includes standard low pressure electric current
Sensor 121 and the seal 122 for being arranged at standard low pressure current transformer 121, the connection of standard low pressure current transformer 121 rise
Source device 110 and error measuring means 130.
The primary side connection of standard low pressure current transformer 121 rises source device 110, for realizing the electric current and two of primary side
The conversion of the electric current of secondary side, and the current signal of secondary side is exported to error measuring means 130.Seal 122 is used to realize
The isolation of high-low pressure, to ensure that standard low pressure current transformer 121 works in security when under high pressure conditions.By using
Standard low pressure current transformer 121 and seal 122, standard low pressure current transformer 121 is packaged in high-pressure side so that mark
The primary side of quasi- low-voltage current mutual inductor 121 is still operated under same current potential with secondary side, can be achieved in a high voltage state
Error testing, it is simple in construction and safe.
Specifically, the isolation method for the high-low pressure that different voltage class uses is different；Seal 122 is in standard low pressure
Voltage of high pressure conditions that set-up mode on current transformer 121 can be worked according to standard low pressure current transformer 121 etc.
Level change, such as, seal 122 can be insulating paper, can be on side of the standard low pressure current transformer 121 by ground
Attach insulating paper.
In one embodiment, standard low pressure current transformer 121 is accuracy class than tested high-tension current inductor 200
The low-voltage current mutual inductor of high at least two grade of accuracy class.
Current transformer is each corresponding with precision, can be indicated when dispatching from the factory by manufacturer.Provided according to industry, precision is carried out
Grade classification, multiple accuracy classes can be obtained；The numerical value for being generally used to refer to precision is less than 1, and numerical value is smaller, and precision is higher；
For example 0.1,0.01,0.001,0.0001 be respectively four different accuracy classes gradually rising of accuracy class；If tested height
The accuracy class of voltage current transformer 200 is 0.1, then the low-voltage current mutual inductor that choice accuracy grade is 0.0001 is as standard
Low-voltage current mutual inductor 121.It is determined that after tested high-tension current inductor 200, accuracy class is chosen than tested high-tension current mutual inductance
The current transformer of high at least two grade of accuracy class of device 200 is as standard low pressure current transformer 121, and now standard is low
The error of voltage current transformer 121 can be neglected, high as the canonical reference object of error measure, accuracy.
In the present embodiment, error measuring means 130 receives standard low pressure current transformer 121 and tested high-tension current mutual inductance
The current signal of 200 respective secondary side of device simultaneously respectively obtains corresponding secondary side current；Error measuring means 130 calculates tested
The difference of the secondary side current of high-tension current inductor 200 and the secondary side current of standard low pressure current transformer 121 is tested
The error amount of high-tension current inductor 200.
Because the error of standard low pressure current transformer 121 can be neglected, therefore standard low pressure current transformer 121
Then the secondary side current as standard, calculating are tested the secondary side current and standard of high-tension current inductor 200 to secondary side current
Secondary side current difference, then be tested high-tension current inductor 200 error amount.In this way, error measure mode is simple, and it is accurate
True property is high.
It is appreciated that in other embodiments, standard low pressure current transformer 121 can also use accuracy class than tested
The current transformer of the high grade of accuracy class of high-tension current inductor 200.Now, standard low pressure current transformer 121
Accuracy class it is inadequate because the error of of standard low pressure current transformer 121 itself be can not ignore.Now, error measuring means
130 calculate the secondary side current of tested high-tension current inductor 200 and standard low pressure current transformer 121 secondary side current it
After difference obtains difference, then difference obtained into tested high-tension current inductor 200 plus the error of standard low pressure current transformer 121
Error amount.
In one embodiment, high voltage standard current transformer device 120 also includes opto-electronic conversion transmitting device, standard low pressure
The current signal of the secondary side of current transformer 121 is exported to error measuring means 130 by opto-electronic conversion transmitting device.
Opto-electronic conversion transmitting device is used to the secondary side current signal of standard low pressure current transformer 121 being converted to light letter
It is transmitted after number, then converts optical signals to current signal and send to error measuring means 130.Filled by using opto-electronic conversion
Put by the secondary side current signal of standard low pressure current transformer 121 change and sent in the form of optical signal to low-pressure side
Error measuring means 130, realize the measurement of high-pressure side high current, and efficiency of transmission is high.
In one embodiment, transmitting terminal optical-electrical converter 123, optical fiber are included with continued reference to Fig. 2, opto-electronic conversion transmitting device
124 and receiving terminal optical-electrical converter 125, transmitting terminal optical-electrical converter 123 connects the one end of optical fiber 124 and standard low pressure Current Mutual Inductance
Device 121, receiving terminal optical-electrical converter 125 connect the other end of optical fiber 124 and error measuring means 130.
Transmitting terminal optical-electrical converter 123 is used to change the current signal of the secondary side of standard low pressure current transformer 121
For optical signal；Optical fiber 124 is used for the optical signal transmission that transmitting terminal optical-electrical converter 123 is changed to receiving terminal optical-electrical converter
125；Receiving terminal optical-electrical converter 125 is used to convert optical signals to current signal and exported to error measuring means 130.Such as
This, it is high by using optical fiber transmission means, efficiency of transmission.
Specifically, transmitting terminal optical-electrical converter 123 can be fixedly installed on standard low pressure current transformer 121, receiving terminal light
Electric transducer 125 can be fixedly installed on error measuring means 130；In this way, the stability connected between device can be improved.
In one embodiment, error measuring means 130 is current transformer calibrator.Current transformer calibrator can be automatic
It is high to carry out error-detecting, functional, and accuracy.It is appreciated that in other embodiments, error measuring means 130 may be used also
With using other equipment, such as processor.
In one embodiment, above-mentioned high-tension current inductor error measuring system also includes connection error measuring means 130
Electric supply installation (not shown).Electric supply installation is used to provide operating voltage to error measuring means 130.In this way, high pressure can be improved
The ease of use of current transformer error measuring system.
In one embodiment, above-mentioned high-tension current inductor error measuring system also includes connection error measuring means 130
Warning device (not shown).Error measuring means 130 sends alarm signal extremely when the error that detection obtains is more than preset value
Warning device is to be alarmed.
Wherein, preset value can be according to being actually needed specific setting.When the error that detection obtains is more than preset value, expression quilt
It is larger to survey the error of high-tension current inductor 200, beyond the alarm threshold value of setting.Now, carried out by using warning device
Alarm, can remind user's testing result in time.Specifically, warning device can be appointing in voice announcer and audible-visual annunciator
Meaning is a kind of.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of high-tension current inductor error measuring system, it is characterised in that including a liter source device, high voltage standard Current Mutual Inductance
Device device and error measuring means, described liter of source device connect the high voltage standard current transformer device and tested high-tension current
Transformer, the error measuring means connect the high voltage standard current transformer device and the tested high-tension current mutual inductance
Device；
Primary side and the tested high-tension electricity of the described liter of source device output high pressure to the high voltage standard current transformer device
The primary side of current transformer, the high voltage standard current transformer device and the tested high-tension current inductor export two respectively
The current signal of secondary side to the error measuring means, the error measuring means fills according to the high voltage standard current transformer
Put and obtain the tested high-tension current inductor with the current signal of the tested respective secondary side of high-tension current inductor
Error amount.
2. high-tension current inductor error measuring system according to claim 1, it is characterised in that described liter of source device is defeated
The high pressure gone out is equal to the rated voltage of the tested high-tension current inductor.
3. high-tension current inductor error measuring system according to claim 1, it is characterised in that described liter of source device bag
Include booster and current lifting device, the booster connects low tension feed unit with the input of the current lifting device, the booster and
The output end of the current lifting device connects the high voltage standard current transformer device and the tested high-tension current inductor.
4. according to the high-tension current inductor error measuring system described in claim any one of 1-3, it is characterised in that the height
Pressure standard current transformer device includes standard low pressure current transformer and is arranged at the exhausted of the standard low pressure current transformer
Edge device, the standard low pressure current transformer connect described liter of source device and the error measuring means.
5. the high-tension current inductor error measuring system stated according to claim 4, it is characterised in that the high voltage standard electric current
Transformer device also includes opto-electronic conversion transmitting device, and the current signal of the secondary side of the standard low pressure current transformer passes through
The opto-electronic conversion transmitting device is exported to the error measuring means.
6. high-tension current inductor error measuring system according to claim 5, it is characterised in that the opto-electronic conversion passes
Defeated device includes optical fiber, transmitting terminal optical-electrical converter and receiving terminal optical-electrical converter, and the transmitting terminal optical-electrical converter connects institute
Optical fiber one end and the standard low pressure current transformer are stated, the receiving terminal optical-electrical converter connects the optical fiber other end and institute
State error measuring means.
7. the high-tension current inductor error measuring system stated according to claim 4, it is characterised in that the standard low pressure electric current
Transformer is that accuracy class is more mutual than the low-tension current of high at least two grade of accuracy class of the tested high-tension current inductor
Sensor.
8. high-tension current inductor error measuring system according to claim 7, it is characterised in that the error measure dress
Put and receive the current signal of the standard low pressure current transformer and the respective secondary side of tested high-tension current inductor simultaneously
Corresponding secondary side current is respectively obtained, the error measuring means calculates the secondary side electricity of the tested high-tension current inductor
The difference of the secondary side current of stream and the standard low pressure current transformer obtains the error amount of the tested high-tension current inductor.
9. high-tension current inductor error measuring system according to claim 1, it is characterised in that the error measure dress
It is set to current transformer calibrator.
10. high-tension current inductor error measuring system according to claim 1, it is characterised in that also include connection institute
State the electric supply installation of error measuring means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710754588.3A CN107356895B (en) | 2017-08-29 | 2017-08-29 | Error measurement system of high-voltage current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710754588.3A CN107356895B (en) | 2017-08-29 | 2017-08-29 | Error measurement system of high-voltage current transformer |
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| CN107356895A true CN107356895A (en) | 2017-11-17 |
| CN107356895B CN107356895B (en) | 2023-09-15 |
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| CN201710754588.3A Active CN107356895B (en) | 2017-08-29 | 2017-08-29 | Error measurement system of high-voltage current transformer |
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| CN110907729A (en) * | 2019-11-29 | 2020-03-24 | 科大智能电气技术有限公司 | Power equipment testing method based on active compensation mutual inductor and three-phase source |
| CN113466600A (en) * | 2021-08-03 | 2021-10-01 | 国网四川省电力公司营销服务中心 | Circuit, method and use for detecting the effect of leakage current on a current transformer |
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| Publication number | Publication date |
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| CN107356895B (en) | 2023-09-15 |
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