CN207937587U - A kind of detection device and detecting system of electric mutual inductor - Google Patents
A kind of detection device and detecting system of electric mutual inductor Download PDFInfo
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- CN207937587U CN207937587U CN201820154846.4U CN201820154846U CN207937587U CN 207937587 U CN207937587 U CN 207937587U CN 201820154846 U CN201820154846 U CN 201820154846U CN 207937587 U CN207937587 U CN 207937587U
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Abstract
The utility model provides a kind of detection device and detecting system of electric mutual inductor,The control signal being detected to electric mutual inductor is exported by control unit,And the voltage error of electric mutual inductor is determined based on the reference voltage and target voltage received,The current error of electric mutual inductor is determined based on the reference current and target current received,Using controlled voltage source according to detection the first test electricity consumption of control signal output and the second test electricity consumption,By the normal voltage mutual inductance unit with boosting according to the first test electricity output test voltage and reference voltage,Test voltage is for making electric mutual inductor export target voltage,Electric current and reference current are tested according to test electricity output by the normalized current mutual inductance unit with up-flow,Test electric current is for making electric mutual inductor export target current,So that during testing electric mutual inductor,Without manual debugging,Improve the testing efficiency to electric mutual inductor.
Description
Technical field
The utility model belongs to the detection device and detection system of electronic technology field more particularly to a kind of electric mutual inductor
System.
Background technology
Electronic type voltage transformer and electronic current mutual inductor are referred to as electric mutual inductor, with electric mutual inductor quilt
Extensively using with electrical power transmission system such as ring main unit and on-pole switch, the demand to electric mutual inductor is also increasing.
Although the tester of existing electric mutual inductor can dispatch from the factory to electric mutual inductor before performance test,
During being tested electric mutual inductor using tester, needs to rely on and manually debugged and operated ability to tester
Enough to complete test, testing efficiency is relatively low.
Utility model content
The utility model embodiment provides a kind of detection device and detecting system of electric mutual inductor, can improve to electricity
The testing efficiency of sub- mutual inductor.
The purpose of this utility model is to provide a kind of detection devices of electric mutual inductor, including：
Control unit, for exporting the control signal being detected to electric mutual inductor, and based on the reference electricity received
Pressure and target voltage determine the voltage error of the electric mutual inductor, and institute is determined based on the reference current and target current received
State the current error of electric mutual inductor；
Controlled voltage source is connected with described control unit, for according to the control signal output first test electricity consumption with
Second test electricity consumption；
With boosting normal voltage mutual inductance unit, respectively with the electric mutual inductor, described control unit and it is described by
It controls voltage source to be connected, the normal voltage mutual inductance unit of the band boosting is used for according to the first test electricity output test voltage
With the reference voltage, the test voltage is for making the electric mutual inductor export the target voltage；
With up-flow normalized current mutual inductance unit, respectively with the electric mutual inductor, described control unit and it is described by
It controls voltage source to be connected, the normalized current mutual inductance unit of the band up-flow is used to test electric current according to second test electricity output
With the reference current, the test electric current is for making the electric mutual inductor export the target current.
The another object of the utility model is to provide a kind of detecting system of electric mutual inductor, including host computer, described
Detecting system further includes the detection device of electric mutual inductor as described above.
The detection device and detecting system of a kind of electric mutual inductor provided by the utility model pass through control unit output pair
The control signal that electric mutual inductor is detected, and electric mutual inductor is determined based on the reference voltage and target voltage received
Voltage error is determined the current error of electric mutual inductor based on the reference current and target current received, utilizes controlled voltage
Source is according to detection the first test electricity consumption of control signal output and the second test electricity consumption, by the normal voltage mutual inductance unit root with boosting
According to the first test electricity output test voltage and reference voltage, test voltage is used to that electric mutual inductor to be made to export target voltage, by
Normalized current mutual inductance unit with up-flow tests electric current and reference current according to test electricity output, and test electric current is for making
Electric mutual inductor exports target current so that during testing electric mutual inductor, is not necessarily to manual debugging, improves
To the testing efficiency of electric mutual inductor.
Description of the drawings
It is required in being described below to embodiment to make in order to illustrate more clearly of the utility model embodiment technical solution
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is some embodiments of the utility model, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of the detection device for electric mutual inductor that the utility model embodiment provides；
Fig. 2 is a kind of concrete structure schematic diagram of the detection device for electric mutual inductor that the utility model embodiment provides；
Fig. 3 be the utility model embodiment provide a kind of electric mutual inductor detection device in echo signal amplifying unit
Physical circuit figure；
Fig. 4 be the utility model embodiment provide a kind of electric mutual inductor detection device in boost mutual inductance unit unit
Physical circuit figure；
Fig. 5 be the utility model embodiment provide a kind of electric mutual inductor detection device in the first amplifying unit tool
Body circuit diagram；
Fig. 6 be the utility model embodiment provide a kind of electric mutual inductor detection device in flow up mutual inductance unit tool
Body circuit diagram；
Fig. 7 be the utility model embodiment provide a kind of electric mutual inductor detection device in the second amplifying unit tool
Body circuit diagram；
Fig. 8 is the overall plan schematic diagram of the utility model；
Fig. 9 is a kind of structural schematic diagram of the detecting system for electric mutual inductor that the utility model embodiment provides.
Specific implementation mode
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
It clearly and completely describes, it is clear that described embodiment is the utility model a part of the embodiment, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Fig. 1 is referred to, Fig. 1 is a kind of structure of the detection device for electric mutual inductor that the utility model embodiment provides,
For convenience of description, it illustrates only and the relevant part of the utility model embodiment.
As shown in Figure 1, a kind of detection device 100 of electric mutual inductor, including：Control unit 10, controlled voltage source 20, band
The normal voltage mutual inductance unit 30 of boosting and the normalized current mutual inductance unit 40 with up-flow.Specifically：
Control unit 10, for exporting the control signal being detected to electric mutual inductor 110, and based on the ginseng received
It examines voltage and target voltage determines the voltage error of electric mutual inductor 110, it is true based on the reference current and target current received
Determine the current error of electric mutual inductor 110.
Controlled voltage source 20 is connected with control unit 10, for according to detection control signal output first test electricity consumption and
Second test electricity consumption.
With boosting normal voltage mutual inductance unit 30, respectively with electric mutual inductor 110, control unit 10 and controlled voltage
Source 20 is connected, and the normal voltage mutual inductance unit with boosting is used for according to the first test electricity output test voltage and reference voltage,
Test voltage is for making electric mutual inductor 110 export target voltage.
With up-flow normalized current mutual inductance unit 40, respectively with electric mutual inductor 110, control unit 10 and controlled voltage
Source 20 is connected, and the normalized current mutual inductance unit with up-flow is used to test electric current and reference current according to the second test electricity output,
Test electric current is for making electric mutual inductor 110 export target current.
It should be noted that electric mutual inductor can be individually to be detected electronic type voltage transformer, individually tested electricity
Type current sensor, three phase combined electronic type voltage transformer or three phase combined electronic current mutual inductor.Utilizing electricity
When the detection device 100 of sub- mutual inductor tests electronic type voltage transformer, the detection device 100 of electric mutual inductor exports
Be electronic type voltage mutual inductance voltage error, using electric mutual inductor detection device 100 to electronic current mutual inductor
When being tested, what the detection device 100 of electric mutual inductor exported is the current error of electronic current mutual inductance.
In the present embodiment, test voltage is single-phase test voltage, in the process tested electric mutual inductor 110
In, pass through the output of normal voltage mutual inductance unit 30 with up-flow to one or more electric mutual inductors in single-phase test voltage
110.Test electric current is single-phase test electric current, and during testing electric mutual inductor 110, single-phase test electric current passes through
Normalized current mutual inductance unit 40 with up-flow is exported to one or more electric mutual inductors 110.
In all embodiments of the application, it is defeated according to control signal that control unit 10 is additionally operable to detection controlled voltage source 20
The the first test electricity consumption and the second test electricity consumption gone out, when detecting that the first test electricity consumption is less than the first predetermined threshold value, output is new
Control signal, make test electricity consumption of the controlled voltage source 20 according to new control signal output equal to the first predetermined threshold value；
Alternatively, when detecting that the second test electricity consumption is less than the second predetermined threshold value, new control signal is exported, the controlled voltage source is made
The 20 test electricity consumption according to new control signal output equal to the second predetermined threshold value.
Fig. 2 shows a kind of concrete structure schematic diagrams of the detection device of electric mutual inductor of the utility model embodiment, are
Convenient for explanation, illustrate only and the relevant part of the utility model embodiment.
As shown in Fig. 2, control unit 10 includes：Echo signal amplifying unit 11, AD conversion unit 12 and processing are single
Member 13.
Echo signal amplifying unit 11 is connected with AD conversion unit 12, and AD conversion unit 12 is separately connected with boosting
Normal voltage mutual inductance unit 30, the normalized current mutual inductance unit 40 with up-flow and processing unit 13, echo signal amplifying unit
11 pairs of target voltages are amplified respectively with target current, obtain amplified target voltage and amplified target current, mould
Number converting unit 12 is used to distinguish reference voltage, amplified target voltage, reference current and amplified target current
It is converted into corresponding digital signal, and is sent to processing unit 13.
As shown in Fig. 2, the normal voltage mutual inductance unit 30 with boosting includes：Boost mutual inductance unit 31 and the first amplifying unit
32。
The mutual inductance unit 31 that boosts includes input terminal 311, the first output end 312 and second output terminal 313, and boost mutual inductance list
The input terminal 311 of member 31 connects controlled voltage source 20, and the first output end 312 of boosting mutual inductance unit 31 connects electric mutual inductor
110, the second output terminal 313 of boosting mutual inductance unit 31 connects the first amplifying unit 32, and the output end of the first amplifying unit 32 connects
Connect control unit 10, boosting mutual inductance unit 31 with being electrically generated test voltage and first voltage, and passes through boosting mutual inductance according to test
Test voltage is sent to electric mutual inductor 110 by the first output end 312 of unit 31, makes electric mutual inductor 110 according to test electricity
First voltage is sent to the first amplifying unit by pressure output target voltage by the second output terminal 313 for the mutual inductance unit 31 that boosts
32, the first amplifying unit 32 is amplified first voltage to obtain reference voltage.
As a kind of mode in the cards of the present embodiment, the first output end 312 of boosting mutual inductance unit 31 may include
Three connecting terminals, for exporting the identical single-phase test voltage in three tunnels to electric mutual inductor 110, each connecting terminal connects respectively
Connect three voltage input ends of the same electric mutual inductor 110 so that the electric mutual inductor 110 is defeated according to the three tunnels test voltage
Go out three road target voltages；Or each connecting terminal is separately connected the voltage input end of different electric mutual inductors 110, different electricity
Sub- mutual inductor 110 exports different target voltages according to test voltage respectively.
As shown in Fig. 2, the normalized current mutual inductance unit 40 with up-flow includes：Flow up mutual inductance unit 41 and the second amplifying unit
42。
It includes input terminal 411, the first output end 412 and second output terminal 413 to flow up mutual inductance unit 41, flows up mutual inductance list
The input terminal 411 of member 41 connects controlled voltage source 20, and the first output end 412 of up-flow mutual inductance unit 41 connects electric mutual inductor
110, the second output terminal 413 of up-flow mutual inductance unit 41 connects the second amplifying unit 42, and the output end of the second amplifying unit 42 connects
Connect control unit 10, up-flow mutual inductance unit 41 with being electrically generated test electric current and the first electric current, and passes through up-flow mutual inductance according to test
First output end 412 of unit 41 is sent to electric mutual inductor 110 by electric current is tested, and makes electric mutual inductor 110 according to test electricity
First electric current is sent to the second amplifying unit 42 by stream output target current, the second output terminal by flowing up mutual inductance unit 41,
Second amplifying unit 42 is amplified to obtain reference current to the first electric current.
As a kind of mode in the cards of the present embodiment, the first output end 412 of up-flow mutual inductance unit 41 may include
Two connecting terminals connect at least one electric mutual inductor 110, electronics mutual inductance between the first connecting terminal and the second connecting terminal
Device 110 exports target current respectively according to test electric current.
Fig. 3 shows echo signal amplifying unit in a kind of detection device of electric mutual inductor of the utility model embodiment
Physical circuit figure.
As shown in figure 3, echo signal amplifying unit 11 includes signal amplification circuit, signal amplification circuit includes signal amplification
Device UX and connecting wire L1.
The first input end of signal amplifier UX and the first end composition echo signal amplifying unit 11 of connecting wire L1
Second input terminal of input terminal, signal amplifier UX is connected with the output end of signal amplifier UX, forms first node UX1, the
The output end of the second end composition echo signal amplifying unit 11 of one node UX1 and connecting wire L1.
Fig. 4 shows the mutual inductance unit unit that boosts in a kind of detection device of electric mutual inductor of the utility model embodiment
Physical circuit figure.
As shown in figure 4, boosting mutual inductance unit 31 includes：First transformer T1 and the second transformer T2.
The input terminal of the both ends composition boosting mutual inductance unit 31 of the armature winding of first transformer T2, time of the first transformer
The both ends (A, X) of grade winding are connected with the both ends of the armature winding of the second transformer T2 respectively, composition boosting mutual inductance unit 31
First output end, the second output terminal of both ends (a, x) the composition boosting mutual inductance unit 31 of the secondary windings of the second transformer T2.
Fig. 5 show the utility model embodiment provide a kind of electric mutual inductor detection device in the first amplifying unit
Physical circuit figure, as shown in figure 5, the first amplifying unit 32 includes：First resistor R1, second resistance R2 and the first amplifier
U1。
The first end of first resistor R1 is respectively used to connect the secondary of the second transformer T1 with the first end of second resistance R2
The both ends (a, x) of winding, the second end of first resistor R1 connect the first of the first amplifier U1 altogether with the second end of second resistance R2
Input terminal, the second input terminal of the first amplifier U1 are grounded altogether with the first end of second resistance R2, the output end of amplifier U1 with
The second end of second resistance R2 forms the output end of the first amplifying unit 32.
Fig. 6 show the utility model embodiment provide a kind of electric mutual inductor detection device in flow up mutual inductance unit
Physical circuit figure, as shown in fig. 6, up-flow mutual inductance unit 41 includes：Third transformer T3 and the 4th transformer T4.
The input terminal of the both ends composition up-flow mutual inductance unit 41 of the armature winding of third transformer T3, third transformer T3's
The first end of secondary windings is connected with the first end of the armature winding of the 4th transformer T4, the secondary windings of third transformer T3
First output end of the second end P2 composition up-flow mutual inductances unit 41 of the armature winding of second end P1 and the 4th transformer T4, the 4th
The second output terminal of both ends (K1, K2) the composition up-flow mutual inductance unit 41 of the secondary windings of transformer T4.
Fig. 7 show the utility model embodiment provide a kind of electric mutual inductor detection device in the second amplifying unit
Physical circuit figure, as shown in fig. 7, the second amplifying unit 42 includes：5th transformer T5,3rd resistor R3 and the second amplification
Device U2.
The both ends of the armature winding of 5th transformer T5 be separately connected the secondary windings of the 4th transformer T4 both ends (K1,
K2), the first end of the armature winding of the 5th transformer T5 connects the first of the second amplifier U2 altogether with the first end of 3rd resistor R3
Input terminal, the second end of 3rd resistor R3 are connected with the output end of the second amplifier U2, form second node U21, the 5th transformation
The second end of the secondary windings of device T5 and the second input terminal of the second amplifier U2 are grounded altogether, form third node U22, the second section
Point U21 forms the output end of the second amplifying unit 42 with third node U22.
Below in conjunction with Fig. 2 to Fig. 7 to the present embodiment by a kind of electric mutual inductor detection device 100 operation principle
It is described in detail.
As shown in Fig. 2, the detection device 100 of electric mutual inductor is connected at least one electric mutual inductor 110, wherein
During being detected to electric mutual inductor 110, control unit 10 sends control signal, controlled electricity to controlled voltage source 20
Potential source 20 is according to the first test electricity consumption of control signal output and the second test electricity consumption, wherein output the first test electricity consumption is used for
Normal voltage mutual inductance unit 30 with boosting generates test voltage and reference voltage, and test voltage is for making electric mutual inductor 110
Export target voltage；Second test electricity consumption is used for the normalized current mutual inductance unit 40 with up-flow and generates test electric current and with reference to electricity
Stream, test electric current is for making electric mutual inductor 110 export target current.
When controlled voltage source 20 is according to the first test electricity consumption of control signal output and the second test electricity consumption, control unit 10
Electricity consumption is tested by the first test electricity consumption of detection and the second test electricity consumption, and in the amplitude of the first test electricity consumption and/or second
When amplitude does not meet predetermined threshold value, new control signal is exported, so that the amplitude of adjustment the first test electricity consumption and/or the second survey
The amplitude for trying out electricity meets predetermined threshold value.
Normal voltage mutual inductance unit 30 with boosting is according to the first test electricity output test voltage and reference voltage, test
Voltage is for making electric mutual inductor 110 export target voltage.As shown in figure 4, the first test electricity consumption passes through the first transformer T1's
After the both ends input of armature winding, electricity consumption is tested by the secondary windings pair first of the first transformer T1 and is boosted, is tested
Voltage, after the armature winding both ends of the second transformer T2 input the test voltage, by the secondary windings of the second transformer T2 to this
Test voltage carries out mutual inductance, obtains reference voltage.
As shown in Fig. 2, Fig. 4 and Fig. 5, reference voltage is sent by the secondary windings both ends (a, x) of the second transformer T2
To the first amplifying unit 32 AD conversion unit 12 is sent to after being amplified to reference voltage by the first amplifying unit 32.Together
When, test voltage is sent to electric mutual inductor 110 by the secondary windings of the first transformer T1, and electric mutual inductor 110 is according to this
Test voltage generates target voltage, and after being amplified by echo signal amplifying unit 11, is sent to AD conversion unit 12,
After carrying out analog-to-digital conversion to reference voltage and target voltage by AD conversion unit 12, obtain two groups of digital signals, and by this two
Group digital signal is sent to processing unit 13, and then determines electric mutual inductor based on two groups of digital signals by processing unit 13
110 voltage error.
Normalized current mutual inductance unit 40 with up-flow tests electric current and reference current, test according to the second test electricity output
Electric current is for making electric mutual inductor 110 export target current.As shown in fig. 6, the second test electricity consumption passes through third transformer T3's
After the both ends input of armature winding, it is incuded by the part winding of the secondary windings of the first transformer T1, and together with the
The armature winding of four transformer T4 carries out Current Mutual Inductance, and electric current is tested in output, meanwhile, lead on the secondary windings of the 4th transformer T4
It crosses and Current Mutual Inductance generation reference current is carried out to test electric current.
As shown in Fig. 2, Fig. 6 and Fig. 7, the secondary windings both ends (K1, K2) of the 4th transformer T4 send reference current
To the second amplifying unit 42, received by the 5th transformer T5 in the second amplifying unit 42, and by the second amplifier U2 to reference
After electric current is amplified, it is sent to AD conversion unit 12.Meanwhile testing electric current the by the secondary windings of three transformer T3
The second end P2 of the armature winding of two end P1 and the 4th transformer T4 is sent to electric mutual inductor 110, electric mutual inductor 110
Target current is generated according to the test voltage, and AD conversion unit 12 is sent to after amplifying by echo signal amplifying unit 11,
After carrying out analog-to-digital conversion to reference current and target current by AD conversion unit 12, obtain two groups of digital signals, and by this two
Group digital signal is sent to processing unit 13, and then determines electric mutual inductor based on two groups of digital signals by processing unit 13
110 current error.
Fig. 8 shows the overall plan of the utility model, as shown in figure 8, the detection device 100 of electric mutual inductor, by journey
Control voltage source (1,2) band boosting voltage standard mutual inductor 3, with flow up current standard mutual inductor 4, accurate voltage converter 5,
Precision current converter 6, voltage-tracing and driving (7a, 7b, 7c, 7d, 7e, 7f), 8 Channel Synchronous sampling A/D converter 8,
Dsp controller 9 forms.It can be to being individually detected electronic type voltage transformer (10a, 10b, 10c) or being individually detected electronic type
Current sensors (11a, 11b, 11c) carry out error-detecting, can also be formed to electronic type voltage transformer (10a, 10b, 10c)
Three phase combined electronic type voltage transformer or electronic current mutual inductor (11a, 11b, 11c) composition three phase combined electricity
Type current transformer is detected.
Dsp controller 9 as shown in Figure 8 is exported by serial ports 1 in control instruction to the serial ports of program-controlled voltage source 1, control
1 output voltage of program-controlled voltage source drives the voltage standard mutual inductor 3 with boosting that the voltage value of program-controlled voltage source 1 is increased to one
Secondary voltage value, primary voltage are applied to tested electronic type voltage transformer (10a, 10b, 10c) and the voltage mark with boosting simultaneously
Standard potential transformer inside quasi- mutual inductor 3, with the standard potential transformer output inside the voltage standard mutual inductor 3 to boost
On accurate quadratic transformation voltage a, x to a0, x0 of the accurate voltage converter 5 of the present apparatus for 0.02%, accurate voltage transformation
Device 5 exports (Vr_1V) and is linked on the channel 1 of 8 Channel Synchronous sampling A/D converter 8, is detected electronic type voltage transformer
The secondary output (a1, x1) of (10a, 10b, 10c), (a2, x2), (a3, x3) are linked into voltage-tracing and drive the defeated of (2,4,6)
On entering, the output (V1_1V, V2_1V, V3_1V) of voltage-tracing and driving (2,4,6) is linked into 8 Channel Synchronous sampling A/D and turns
On the channel (4,6,8) of parallel operation, 8 Channel Synchronous sample A/D converter synchronized sampling channel 1, channel 4, channel 6, channel 8
Sampled value, using channel 1 as standard channel, channel 4, channel 6, channel 8 pass through Fourier algorithm and other as channel is detected
Algorithm calculates the amplitude error in synchronized sampling channel 1 and channel 4 and phase error is exactly tested electronic type voltage transformer 10a
Amplitude error and phase error, similarly, using channel 1 as standard channel, channel 6, channel 8 pass through Fu as channel is detected
In leaf algorithm and other algorithms calculate synchronized sampling channel 1 and channel 6, the amplitude error in channel 8 and phase error is exactly quilt
Examine the amplitude error and phase error of electronic type voltage transformer 10b, 10c.
Dsp controller 9 as shown in Figure 8 is exported by serial ports 2 in control instruction to the serial ports of program-controlled voltage source 2, control
2 output voltage of program-controlled voltage source, it is one to drive the current standard mutual inductor 4 with up-flow that the current value of program-controlled voltage source 2 is flowed up
Primary current value, primary current are applied to terminal of tested electronic current mutual inductor (11a, 11b, 11c) and simultaneously with up-flows
Current standard mutual inductor 4 inside standard current transformer, with up-flow current standard mutual inductor 4 inside normalized current it is mutual
Sensor output is accurately that 0.02% quadratic transformation electric current (K1, K2) arrives on (T0, Tx) of the precision current converter of the present apparatus,
Precision current converter output (Ir_1V) is linked on the channel 2 of 8 Channel Synchronous sampling A/D converter, is detected electronic current
The secondary output (1s1,1s2) of mutual inductor (11a, 11b, 11c), (2s1,2s2), (3s1,3s2) are linked into voltage-tracing and drive
In the input of dynamic (1,3,5), it is same that the output (I1_1V, I2_1V, I3_1V) of voltage-tracing and driving (1,3,5) is linked into 8 channels
Step samples on the channel 3, channel 5, channel 7 of A/D converter, and 8 Channel Synchronous sample A/D converter synchronized sampling channel 2, channel
3, the sampled value in channel 5, channel 7, using channel 2 as standard channel, channel 3, channel 5, channel 7 pass through as channel is detected
Fourier algorithm and other algorithms calculate the amplitude error in synchronized sampling channel 2 and channel 3 and phase error is exactly tested electricity
The amplitude error and phase error of type current transformer 11a, similarly, using channel 2 as standard channel, channel 5, channel 7 are divided
Channel Zuo Wei be detected, by Fourier algorithm and other algorithms calculate synchronized sampling channel 2 respectively with channel 5 and channel 7
Amplitude error and phase error be exactly tested electronic current mutual inductor (11b, 11c) amplitude error and phase error.
The another object of the utility model is to provide a kind of detecting system 200 of electric mutual inductor, as shown in Fig. 9, electricity
The detecting system 200 of sub- mutual inductor includes host computer 120, further includes the detection device of the electric mutual inductor in above-described embodiment
100。
Since a kind of detecting system of electric mutual inductor provided in the present embodiment is related with the utility model specific
Embodiment and operation principle have elaborated in the above-described embodiments, and therefore, details are not described herein again.
As shown in figure 8, one of the innovative point of the utility model be can to the electronic type voltage transformer of 3 10kV or
1 three phase combined electronic type voltage transformer realizes full automatic phase error and amplitude error calibrating.
Specially：Use program-controlled voltage source 1, the voltage standard mutual inductor 3 with boosting, accurate voltage converter 5,8 channels
Synchronized sampling A/D converter 8, dsp controller 9 realize the full-automatic calibrating to the electronic type voltage transformer of 10KV.
The electronic type voltage transformer used for the metering of 10kV generally only examines and determine 80% rated value, 100% rated value
With the amplitude error and phase error of 120% rated value, that is, with boosting voltage standard mutual inductor 3 export 8kV, 10kV,
Whether the error that tested electronic mutual inductor is detected when 12kV meets the accuracy requirement of its calibration.
Step 1, by 1 output voltage of serial ports calibrating point VSET, (inside is converted to high-voltage value A, an X, becomes for DSP controls 9
Than for 10kV/200V=50) output valve of program-controlled voltage source 1 is arrived, the output valve of program-controlled voltage source 1 is linked into the voltage that band boosts
On standard mutual inductor 3, sub-value A, X of the voltage standard mutual inductor 3 with boosting exports the voltage of about 8KV.(internal liter
The accuracy of depressor Tv 31 only has 10% or so).
Step 2, sub-value A, X of the voltage standard mutual inductor 3 with boosting is accurate by internal voltage standard mutual inductor
It is transformed on secondary voltage to accurate voltage converter 5, continues the analog voltage that accurate transformation is 1V on accurate voltage converter 5
In the input of channel 1 for sampling A/D converter 8 to 8 Channel Synchronous, dsp controller 9 controls 8 Channel Synchronous by SPI interface and adopts
Sample A/D converter 8 acquires and calculates 1 voltage value VM of channel (inside is converted on high-voltage value A, an X), if the one of output
Secondary voltage meets 8kV ± 1%, enters step 3, otherwise, is adjusted to：VSETi=VSETi-1-(VM-VSETi-1), wherein VSETi
For the reset value of this calibrating point VSET, VSETi-1Point VSET setting values were examined and determine for last time.
Continue the voltage value in the channel 1 of measurement 8 Channel Synchronous sampling A/D converter 8, then judges whether to meet 8kV ± 1%
Requirement after meeting the requirements, enter step 3.
Step 3, dsp controller 9 is according to channel 1 and channel 4 (the corresponding tested electronic type voltage transformer sampled
10a), channel 6 (corresponding tested electronic type voltage transformer 10b), channel 8 (corresponding tested electronic type voltage transformer 10c)
Sampled value calculates the amplitude error for being detected electronic type voltage transformer 10a, 10b, 10c by Fourier algorithm and other algorithms
And phase error, and the test data of this calibrating point is preserved, if not being that the last one is cautious, step 1 is returned to, step is otherwise entered
Rapid 4.
Step 4, verification result is printed.
One of innovative point of the utility model is can be to the electronic current mutual inductor or 1 three-phase of 3 1000A
Knockdown electronic current mutual inductor realizes full automatic phase error and amplitude error calibrating.
Specially：Use program-controlled voltage source 2, the current standard mutual inductor 4 with up-flow, precision current converter 6,8 channels
Synchronized sampling A/D converter 8, dsp controller 9 realize the full-automatic calibrating to the electronic current mutual inductor of 1000A.
The current transformer used for the metering of 1000A generally only examines and determine 5% rated value, 20% rated value, 100% volume
The amplitude error and phase error of definite value and 120% rated value, that is, the output of the current standard mutual inductor 4 with up-flow 50A,
Whether the error that tested electronic mutual inductor is detected when 100A, 1000A, 1200A meets the accuracy requirement of its calibration.
Step 1, by the output calibrating point of serial ports 2 ISET, (inside is converted to primary current value P1, P2, no-load voltage ratio for DSP controls 9
For 1000A/5A=200) output valve of program-controlled voltage source 2 is arrived, the output valve of program-controlled voltage source 2 is linked into the electric current mark that band flows up
On quasi- mutual inductor 4, sub-value P1, P2 of the current standard mutual inductor 4 with up-flow exports the electric current of about 1000A.
Step 2, sub-value P1, P2 of the current standard mutual inductor 4 with up-flow passes through internal current standard mutual inductor essence
It is really transformed on secondary current to precision current converter 6, the electric current accurate transformation for continuing handle on precision current parallel operation 6 is 1V's
In the input of channel 2 that analog voltage samples A/D converter 8 to 8 Channel Synchronous, dsp controller 9 controls 8 channels by SPI interface
Synchronized sampling A/D converter 8 acquires and calculates 2 voltage value IM of channel (inside is converted in flow valuve P1, P2), if it is defeated
The primary voltage gone out meets 50A ± 1%, enters step 3, otherwise, is adjusted to：ISETi=ISETi-1-(IM-ISETi-1), wherein
ISETiFor this calibrating point ISET reset value, ISETi-1Point ISET setting values were examined and determine for last time to continue to measure 8 Channel Synchronous
The current value in the channel 2 of A/D converter 8 is sampled, then judges whether the requirement for meeting 50A ± 1%, after meeting the requirements, into
Enter step 3.
Step 3, dsp controller 9 is according to channel 2 and channel 3 (the corresponding tested electronic current mutual inductor sampled
11a), channel 5 (corresponding tested electronic type voltage transformer 11b), channel 7 (corresponding tested electronic current mutual inductor 11c)
Sampled value calculates the amplitude error for being detected electronic type voltage transformer 11a, 11b, 11c by Fourier algorithm and other algorithms
With phase error and the test data of this calibrating point is preserved, if not being that the last one is cautious, step 1 is returned to, otherwise enters step
Rapid 4.
Step 4, verification result is printed.
The detection device and detecting system of a kind of electric mutual inductor provided by the utility model pass through control unit output pair
The control signal that electric mutual inductor is detected, and electric mutual inductor is determined based on the reference voltage and target voltage received
Voltage error is determined the current error of electric mutual inductor based on the reference current and target current received, utilizes controlled voltage
Source is according to detection the first test electricity consumption of control signal output and the second test electricity consumption, by the normal voltage mutual inductance unit root with boosting
According to the first test electricity output test voltage and reference voltage, test voltage is used to that electric mutual inductor to be made to export target voltage, by
Normalized current mutual inductance unit with up-flow tests electric current and reference current according to test electricity output, and test electric current is for making
Electric mutual inductor exports target current so that during testing electric mutual inductor, is not necessarily to manual debugging, improves
To the testing efficiency of electric mutual inductor.
Unit in the utility model embodiment terminal can be combined, divided and deleted according to actual needs.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Any one skilled in the art within the technical scope disclosed by the utility model, can readily occur in various equivalent
Modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, the utility model
Protection domain should be subject to the protection scope in claims.
Claims (10)
1. a kind of detection device of electric mutual inductor, which is characterized in that the detection device includes：
Control unit, for exporting the control signal being detected to electric mutual inductor, and based on the reference voltage received and
Target voltage determines the voltage error of the electric mutual inductor, and the electricity is determined based on the reference current and target current received
The current error of sub- mutual inductor；
Controlled voltage source is connected with described control unit, for according to control signal output the first test electricity consumption and second
Test electricity consumption；
With boosting normal voltage mutual inductance unit, respectively with the electric mutual inductor, described control unit and the controlled electricity
Potential source is connected, and the normal voltage mutual inductance unit of the band boosting is used for according to the first test the electricity output test voltage and institute
Reference voltage is stated, the test voltage is for making the electric mutual inductor export the target voltage；
With up-flow normalized current mutual inductance unit, respectively with the electric mutual inductor, described control unit and the controlled electricity
Potential source is connected, and the normalized current mutual inductance unit of the band up-flow is used to test electric current and institute according to second test electricity output
Reference current is stated, the test electric current is for making the electric mutual inductor export the target current.
2. detection device as described in claim 1, which is characterized in that described control unit includes：Echo signal amplifying unit,
AD conversion unit and processing unit；
The echo signal amplifying unit is connected with the AD conversion unit, and the AD conversion unit is separately connected the band
The normal voltage mutual inductance unit of boosting, the normalized current mutual inductance unit of band up-flow and the processing unit, the target
Signal amplification unit amplifies the target voltage and the target current respectively, obtains amplified target voltage and puts
Target current after big, the AD conversion unit are used for the reference voltage, the amplified target voltage, the ginseng
It examines electric current and the amplified target current is converted into corresponding digital signal respectively, and be sent to the processing unit.
3. detection device as claimed in claim 2, which is characterized in that the echo signal amplifying unit includes signal amplification electricity
Road, the signal amplification circuit include signal amplifier and connecting wire；
The first input end of the signal amplifier and the first end of the connecting wire form the echo signal amplifying unit
Input terminal, the second input terminal of the signal amplifier is connected with the output end of the signal amplifier, forms first node,
The second end of the first node and the connecting wire forms the output end of the echo signal amplifying unit.
4. detection device as described in claim 1, which is characterized in that the normal voltage mutual inductance unit of band boosting includes：
Boost mutual inductance unit and the first amplifying unit；
The boosting mutual inductance unit includes input terminal, the first output end and second output terminal, the defeated of mutual inductance unit that boost
Enter end and connect the controlled voltage source, the first output end of the boosting mutual inductance unit connects the electric mutual inductor, the liter
The second output terminal of mutual inductance unit is pressed to connect first amplifying unit, the output end of first amplifying unit connects the control
Unit processed, the boosting mutual inductance unit according to the test with being electrically generated the test voltage and first voltage, and described in
The test voltage is sent to the electric mutual inductor by the first output end of boosting mutual inductance unit, makes the electric mutual inductor root
Target voltage is exported according to the test voltage, is sent the first voltage by the second output terminal of the boosting mutual inductance unit
To first amplifying unit, first amplifying unit is amplified the first voltage to obtain the reference voltage.
5. detection device as described in claim 1, which is characterized in that the normalized current mutual inductance unit of band up-flow includes：
Flow up mutual inductance unit and the second amplifying unit；
The up-flow mutual inductance unit includes input terminal, the first output end and second output terminal, the up-flow mutual inductance unit it is defeated
Enter end and connect the controlled voltage source, the first output end of the up-flow mutual inductance unit connects the electric mutual inductor, the liter
The second output terminal for flowing mutual inductance unit connects second amplifying unit, and the output end of second amplifying unit connects the control
Unit processed, the up-flow mutual inductance unit according to the test with being electrically generated the test electric current and the first electric current, and described in passing through
The test electric current is sent to the electric mutual inductor by the first output end of up-flow mutual inductance unit, makes the electric mutual inductor root
Target current is exported according to the test electric current, is sent first electric current by the second output terminal of the up-flow mutual inductance unit
To second amplifying unit, second amplifying unit is amplified to obtain the reference current to first electric current.
6. detection device as claimed in claim 4, which is characterized in that the boosting mutual inductance unit includes：First transformer and
Second transformer；
The both ends of the armature winding of first transformer form the input terminal of the boosting mutual inductance unit, first transformer
The both ends of secondary windings be connected respectively with the both ends of the armature winding of second transformer, form the boosting mutual inductance unit
The first output end, the both ends of the secondary windings of second transformer form the second output terminal of the boosting mutual inductance unit.
7. detection device as claimed in claim 6, which is characterized in that first amplifying unit includes：First resistor, second
Resistance and the first amplifier；
The first end of the first resistor is respectively used to connect time of second transformer with the first end of the second resistance
The both ends of grade winding, the second end of the second end of the first resistor and the second resistance connect the of first amplifier altogether
One input terminal, the second input terminal of first amplifier are grounded altogether with the first end of the second resistance, the amplifier
Output end is used to form the output end of first amplifying unit with the second end of the second resistance.
8. detection device as claimed in claim 5, which is characterized in that the up-flow mutual inductance unit includes：Third transformer and
4th transformer；
The both ends of the armature winding of the third transformer form the input terminal of the up-flow mutual inductance unit, the third transformer
The first end of secondary windings be connected with the first end of the armature winding of the 4th transformer, the secondary of the third transformer
The second end of winding and the second end of the armature winding of the 4th transformer form the first output of the up-flow mutual inductance unit
End, the both ends of the secondary windings of the 4th transformer form the second output terminal of the up-flow mutual inductance unit.
9. detection device as claimed in claim 8, which is characterized in that second amplifying unit includes：5th transformer,
Three resistance and the second amplifier；
The both ends of the armature winding of 5th transformer are separately connected the both ends of the secondary windings of the 4th transformer, described
It is first defeated to connect second amplifier altogether for the first end of the secondary windings of 5th transformer and the first end of the 3rd resistor
Enter end, the second end of the 3rd resistor is connected with the output end of second amplifier, forms second node, and the described 5th becomes
The second end of the secondary windings of depressor and the second input terminal of second amplifier are grounded altogether, form third node, and described the
Two nodes form the output end of second amplifying unit with the third node.
10. a kind of detecting system of electric mutual inductor, including host computer, which is characterized in that the detecting system further includes such as power
Profit requires the detection device of 1 to 9 any one of them electric mutual inductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820154846.4U CN207937587U (en) | 2018-01-26 | 2018-01-26 | A kind of detection device and detecting system of electric mutual inductor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820154846.4U CN207937587U (en) | 2018-01-26 | 2018-01-26 | A kind of detection device and detecting system of electric mutual inductor |
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| CN207937587U true CN207937587U (en) | 2018-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108241138A (en) * | 2018-01-26 | 2018-07-03 | 黄建钟 | The detection device and detecting system of a kind of electric mutual inductor |
-
2018
- 2018-01-26 CN CN201820154846.4U patent/CN207937587U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108241138A (en) * | 2018-01-26 | 2018-07-03 | 黄建钟 | The detection device and detecting system of a kind of electric mutual inductor |
| CN108241138B (en) * | 2018-01-26 | 2023-11-21 | 黄建钟 | Detection device and detection system of electronic transformer |
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