CN106932746A - A kind of electronic current mutual inductor performance test system and method - Google Patents
A kind of electronic current mutual inductor performance test system and method Download PDFInfo
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- CN106932746A CN106932746A CN201710252779.XA CN201710252779A CN106932746A CN 106932746 A CN106932746 A CN 106932746A CN 201710252779 A CN201710252779 A CN 201710252779A CN 106932746 A CN106932746 A CN 106932746A
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- mutual inductor
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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
Abstract
The invention discloses a kind of electronic current mutual inductor performance test system and method, including standard current transformer, the test electronic current mutual inductor that primary side is connected, also including sample rate adaptation module and combining unit module；The input of sample rate adaptation module is connected with the output end of test electronic current mutual inductor, and the input difference standard current transformer of combining unit module is connected with the output end of sample rate adaptation module.The present invention is by accessing the electromagnetic current transducer and test electronic current mutual inductor sampling circuit that mixing sampling differential is protected simultaneously; mixing sampling differential loop delay test, the compensation of delay in being protected for UPFC are completed on the basis of electromagnetic current transducer.
Description
Technical field
The invention belongs to Technology of HVDC based Voltage Source Converter field, and in particular to a kind of electronic current mutual inductor performance test system
System and method.
Background technology
DC electronic transformer is the visual plant for measuring flexible direct current power transmission system voltage, and its measurement performance is related to
The safe and stable operation of flexible direct current power transmission system.Good field test equipment, contributes to lifting DC voltage transformer to try
Test efficiency, it is ensured that flexible direct current power transmission system safe and stable operation.
Current field test, method of testing is mainly a flow-through test, and electric current of different sizes is passed through in primary side,
Test the precision of DC electronic transformer, time-delay characteristics carries out multiple wiring, it is necessary to be directed to precision and time-delay characteristics test, weight
Repetition measurement amount, increased workload, and requirement very high is also proposed to field management.
The content of the invention
Regarding to the issue above, the present invention proposes a kind of electronic current mutual inductor performance test system and method, will be accurate
Degree verification and Time delay measurement access the same circuit, are stepped up primary side current, reduce repetition wiring, facilitate field pipes
Reason, improves testing efficiency.
Above-mentioned technical purpose is realized, above-mentioned technique effect is reached, the present invention is achieved through the following technical solutions：
A kind of electronic current mutual inductor performance test system, including standard current transformer, the test that primary side is connected
Electronic current mutual inductor, also including sample rate adaptation module and combining unit module；
The standard current transformer, test electronic current mutual inductor are equipped with synchronizing signal access port, for accessing
Synchronizing signal；
The input of the sample rate adaptation module is connected with the output end of test electronic current mutual inductor, the conjunction
And the input difference standard current transformer of unit module is connected with the output end of sample rate adaptation module；
Sample rate adaptation module receives the sampling value message of test electronic current mutual inductor output, and judges test
The sample rate of electronic current mutual inductor；Then it is sent to combining unit module together with sample rate and sampling value message；
Standard current transformer exports sampling value message to combining unit module；
Combining unit will test the sampling value message and mark of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message of quasi- current transformer output is compared, and the measured value with standard current transformer is calculated and surveyed as standard value
Relative error of the electronic mutual inductor with respect to the standard value is tried, the precision to being tested electronic current mutual inductor is verified.
Further, described a kind of electronic current mutual inductor performance test system, also including electromagnetic type Current Mutual Inductance
Device and delay compensation module；
The primary side of the electromagnetic current transducer is connected with the primary side of test electronic current mutual inductor；The electricity
Input of the output end of magnetic-type current transformer and test electronic current mutual inductor respectively with delay compensation module is connected；
The electromagnetic current transducer is provided with synchronizing signal access port, for accessing synchronizing signal；
The time of the sampling value message of the test electronic current mutual inductor output that delay compensation module will be received and electricity
The time of the real-time Simulation amount of magnetic-type current transformer output is compared, and test electronic mutual inductor sampling value message is relatively electric
The sampling time delay of the analog quantity of magnetic transformer output is Δ t, as compensation of delay when using, electronic current is tested when using
During the data that mutual inductor measuring is obtained, its timestamp is needed to precompensation Δ t.
Further, the standard current transformer, test electronic current mutual inductor and electromagnetic current transducer are equal
By measuring the voltage on its internal noninductive resistance for setting, obtain measuring current value.
Further, the sample rate adaptation module is sample rate judge module, for judging to test electronic current
The actual sample rate of transformer.
Further, the sample rate adaptation module judges the specific of test electronic current mutual inductor actual sample rate
Deterministic process is：
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, illustrated previous
It is secondary to there occurs frame losing, judge that sample rate is 50kHz, sample rate deterministic process terminates；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
A kind of electronic current mutual inductor method for testing performance, comprises the following steps：
To standard current transformer, test electronic current mutual inductor input sync signal；
Test electronic current mutual inductor exports sampling value message to sample rate adaptation module, sample rate adaptation module
After judging sample rate, the sample rate and the sampling value message for receiving are sent to combining unit module；Meanwhile, normalized current
Transformer exports sampling value message to combining unit module；
Combining unit module will test the sampling value message of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message exported with standard current transformer is compared, and the measured value with standard current transformer is right as standard value
The precision of examination test electronic current mutual inductor is verified.
Further, a kind of described electronic current mutual inductor method for testing performance, also includes：To test electronic type electricity
Current transformer and electromagnetic current transducer input sync signal；
Electromagnetic current transducer exports analog quantity to delay compensation module, test electronic current mutual inductor output sampling
It is worth message to delay compensation module；
The time of the sampling value message of the test electronic current mutual inductor output that delay compensation module will be received and electricity
The time of the real-time Simulation amount of magnetic-type current transformer output is compared, and test electronic mutual inductor sampling value message is relatively electric
The sampling time delay of the analog quantity of magnetic transformer output is Δ t, as compensation of delay when using, electronic current is tested when using
During the data that mutual inductor measuring is obtained, its timestamp is needed to precompensation Δ t.
Further, a kind of described electronic current mutual inductor method for testing performance, further comprising the steps of：Change one
Secondary side is passed through electric current, precision and test electronic current mutual inductance in the ratio point record test electronic current mutual inductor drafted
The sampling time delay amount Δ t of device.
Further, the synchronizing signal being input into standard current transformer, test electronic current mutual inductor and electricity
The synchronizing signal of magnetic-type current transformer input is produced by same signal generator.
Further, the sample rate adaptation module judges the specific of test electronic current mutual inductor actual sample rate
Deterministic process is：
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, illustrated previous
It is secondary to there occurs frame losing, judge that sample rate is 50kHz, sample rate deterministic process terminates；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
Beneficial effects of the present invention：
When the present invention measures the arrival of test electronic current mutual inductor sampling value message by sample rate adaptation module
Between, self adaptation 10kHz and 50kHz sampling rate input, combining unit module complete the solution of sampling value message according to sample rate
Analysis；When applying the invention in UPFC systems, with reference to UPFC system power mutual inductor on site a flow-through tests, mark is relied on
Quasi- current transformer carries out high precision analog collection as benchmark, by the noninductive resistance for measuring High Precision Low Temperature degree coefficient
On voltage realize the accurate conversions of I/V, gradually rising primary side since 0 is passed through electric current to rated value, in different ratio point meters
UPFC alterating and direct current minor transformer relative errors are calculated, realizes that the degree of accuracy is verified；By the electromagnetic type for accessing mixing sampling simultaneously
Current transformer and test electronic current mutual inductor sampling circuit, on the basis of electromagnetic current transducer, complete mixing and adopt
Sample differential circuit delay test, the compensation of delay in being protected for UPFC.
Degree of accuracy verification and Time delay measurement are accessed the same circuit by the present invention, are stepped up primary side current, reduce weight
Multiple wire, facilitates field management, improves testing efficiency.
Brief description of the drawings
Fig. 1 is the primary circuit schematic diagram of shunt resistance type OCT；
Fig. 2 is the primary circuit schematic diagram of current transformer and shunt resistance type OCT；
Fig. 3 is the primary circuit schematic diagram of Rogowski coil and shunt resistance type OCT；
Fig. 4 is the principle schematic of electronic current mutual inductor performance test system；
Fig. 5 is the deterministic process flow chart of sample rate adaptation module.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail below in conjunction with the accompanying drawings.
As Figure 1-3, respectively in the prior art shunt resistance type OCT, current transformer and shunt resistance type OCT,
The primary circuit schematic diagram of Rogowski coil and shunt resistance type OCT.Sampled data passes through optical fiber conversing circuits or OIB distal ends mould
Block is exported；The electronic mutual inductor sampling time delay of different principle difference, it is necessary to carry out compensation of delay in application is protected.
Embodiment one
As shown in figure 4, a kind of electronic current mutual inductor performance test system, including the normalized current of primary side series connection is mutual
Sensor, test electronic current mutual inductor, also including sample rate adaptation module and combining unit module；
The standard current transformer, test electronic current mutual inductor are equipped with synchronizing signal access port, for accessing
Synchronizing signal；
The input of the sample rate adaptation module is connected with the output end of test electronic current mutual inductor, the conjunction
And the input difference standard current transformer of unit module is connected with the output end of sample rate adaptation module；
Sample rate adaptation module receives the sampling value message of test electronic current mutual inductor output, and judges test
The sample rate of electronic current mutual inductor；Then it is sent to combining unit module together with sample rate and sampling value message；
Standard current transformer exports sampling value message to combining unit module；
Combining unit will test the sampling value message and mark of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message of quasi- current transformer output is compared, and the measured value with standard current transformer is calculated and surveyed as standard value
The relative error of the sampled value of electronic current mutual inductor is tried, so as to realize verifying its precision.
Preferably, the standard current transformer, test electronic current mutual inductor and electromagnetic current transducer lead to
The voltage measured on its internal noninductive resistance for setting is crossed, obtains measuring current value.
The sample rate adaptation module is sample rate judge module, for judging the reality of test electronic current mutual inductor
Border sample rate.
At present, according to national standard, the sample rate that electronic mutual inductor is used is 10kHz or 50kHz, therefore, such as Fig. 5
Shown, the sample rate adaptation module described in the present embodiment judges the specific of test electronic current mutual inductor actual sample rate
Deterministic process is：
After first point of data are received, start timing；
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, illustrated previous
It is secondary to there occurs frame losing, judge that sample rate is 50kHz, sample rate deterministic process terminates；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
The scheme of the present embodiment, test electronic current mutual inductor sampling value message is measured by sample rate adaptation module
Arrival time, self adaptation 10kHz and 50kHz sampling rate input, combining unit module completes sampled value according to sample rate
The parsing of message；When applying the invention in UPFC systems, with reference to the once through-flow examination of UPFC system powers mutual inductor on site
Test, rely on standard current transformer as benchmark, high precision analog collection is carried out, by measuring High Precision Low Temperature degree coefficient
Voltage on noninductive resistance realizes the accurate conversions of I/V, and gradually rising primary side since 0 is passed through electric current to rated value, in difference
Ratio point calculates UPFC alterating and direct current minor transformer relative errors, realizes that the degree of accuracy is verified.
Embodiment two
The present embodiment is with the difference of embodiment one：
As shown in figure 4, a kind of described electronic current mutual inductor performance test system, also including electromagnetic type Current Mutual Inductance
Device and delay compensation module；
The primary side of the electromagnetic current transducer is connected with the primary side of test electronic current mutual inductor；The electricity
Magnetic-type current transformer is connected with the input of the output end difference delay compensation module of test electronic current mutual inductor；
The electromagnetic current transducer is provided with synchronizing signal access port, for accessing synchronizing signal；
The time of the sampling value message of the test electronic current mutual inductor output that delay compensation module will be received and electricity
The time of the real-time Simulation amount of magnetic-type current transformer output is compared, and test electronic current mutual inductor message is with respect to electromagnetism
The sampling time delay amount Δ t of the analog quantity of formula current transformer output, as the compensation of delay using the electronic current mutual inductor,
When the data measured using test electronic current mutual inductor, its timestamp is needed to precompensation Δ t.
In the acquisition process of the sampling time delay amount in the present embodiment：Electromagnetic current transducer be counted as it is no-delay,
When receiving synchronizing signal, the analog output of electromagnetic current transducer is instant, and the time delay of electronic current mutual inductor is
Sampling time delay, as the compensation of delay amount that UPFC is protected.
In sum：
(1) scheme of the present embodiment measures test electronic current mutual inductor sampled value report by sample rate adaptation module
The arrival time of text, self adaptation 10kHz and 50kHz sampling rate input, combining unit module completes sampling according to sample rate
It is worth the parsing of message；It is once through-flow with reference to UPFC system power mutual inductor on site when applying the invention in UPFC systems
Experiment, relies on standard current transformer as benchmark, high precision analog collection is carried out, by measuring High Precision Low Temperature degree coefficient
Noninductive resistance on voltage realize the accurate conversions of I/V, gradually rising primary side since 0 is passed through electric current to rated value, not
UPFC alterating and direct current minor transformer relative errors are calculated with ratio point, realizes that the degree of accuracy is verified；Adopted by accessing mixing simultaneously
The electromagnetic current transducer and test electronic current mutual inductor sampling circuit of sample, on the basis of electromagnetic current transducer,
Complete mixing sampling differential loop delay test, the compensation of delay in being protected for UPFC.
(2) degree of accuracy verification and Time delay measurement are accessed the same circuit by the scheme of the present embodiment, are stepped up primary side electricity
Stream, reduces repetition wiring, facilitates field management, improves testing efficiency.
Embodiment three
A kind of electronic current mutual inductor method for testing performance, comprises the following steps：
(1) to standard current transformer, test electronic current mutual inductor input sync signal；
(2) test electronic current mutual inductor exports sampling value message to sample rate adaptation module, sample rate self adaptation
After module judges sample rate, the sample rate and the sampling value message for receiving are sent to combining unit module；Normalized current
Transformer exports sampling value message to combining unit module；
(3) combining unit module will test the sampled value of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message that message is exported with standard current transformer is compared, and the measured value with standard current transformer is as standard
Value, the precision to examination test electronic current mutual inductor is verified.
Preferably, a kind of described electronic current mutual inductor method for testing performance, also includes：
(4) to test electronic current mutual inductor and electromagnetic current transducer input sync signal；
(5) electromagnetic current transducer exports analog quantity to delay compensation module, test electronic current mutual inductor output
Sampling value message is to delay compensation module；
(6) delay compensation module will receive test electronic current mutual inductor output sampling value message time with
The time of the analog quantity of electromagnetic current transducer output is compared, and test electronic current mutual inductor message is with respect to electromagnetic type
The sampling time delay amount Δ t of the analog quantity of current transformer output, as compensation of delay when using, when electric using test electronic type
During the data that current transformer is measured, its timestamp is needed to precompensation Δ t.
Preferably, a kind of electronic current mutual inductor method for testing performance, also including step (7)：Change primary side
Electric current (primary side is passed through electric current since 0 to rated current) is passed through, it is mutual in the ratio point record test electronic current drafted
The precision of sensor and the sampling time delay amount Δ t of test electronic current mutual inductor.
Wherein, the synchronizing signal and electromagnetic type being input into standard current transformer, test electronic current mutual inductor
The synchronizing signal of current transformer input is produced by same signal generator so that standard current transformer, test electronic type
Current transformer and electromagnetic current transducer synchronization.
Preferably, the sample rate adaptation module judges specifically sentencing for test electronic current mutual inductor actual sample rate
Disconnected process is：
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, illustrated previous
It is secondary to there occurs frame losing, judge that sample rate is 50kHz, sample rate deterministic process terminates；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
The experimental rig that test method in the present embodiment can be based in embodiment one or embodiment two is realized.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (10)
1. a kind of electronic current mutual inductor performance test system, it is characterised in that：Normalized current including primary side series connection is mutual
Sensor, test electronic current mutual inductor, also including sample rate adaptation module and combining unit module；
The standard current transformer, test electronic current mutual inductor are equipped with synchronizing signal access port, for accessing synchronization
Signal；
The input of the sample rate adaptation module is connected with the output end of test electronic current mutual inductor, described to merge single
The input difference standard current transformer of element module is connected with the output end of sample rate adaptation module；
Sample rate adaptation module receives the sampling value message of test electronic current mutual inductor output, and judges to test electronics
The sample rate of formula current transformer；Then it is sent to combining unit module together with sample rate and sampling value message；
Standard current transformer exports sampling value message to combining unit module；
Combining unit will test the sampling value message and standard electric of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message of current transformer output is compared, and the measured value with standard current transformer calculates test electricity as standard value
Minor transformer with respect to the standard value relative error, to be tested electronic current mutual inductor precision verify.
2. a kind of electronic current mutual inductor performance test system according to claim 1, it is characterised in that：Also include electricity
Magnetic-type current transformer and delay compensation module；
The primary side of the electromagnetic current transducer is connected with the primary side of test electronic current mutual inductor；The electromagnetic type
Input of the output end of current transformer and test electronic current mutual inductor respectively with delay compensation module is connected；
The electromagnetic current transducer is provided with synchronizing signal access port, for accessing synchronizing signal；
The time of the sampling value message of the test electronic current mutual inductor output that delay compensation module will be received and electromagnetic type
The time of the real-time Simulation amount of current transformer output is compared, and test electronic mutual inductor sampling value message is mutual with respect to electromagnetism
The sampling time delay of the analog quantity of sensor output is Δ t, as compensation of delay when using, electronic current mutual inductance is tested when using
During the data that device is measured, its timestamp is needed to precompensation Δ t.
3. a kind of electronic current mutual inductor performance test system according to claim 2, it is characterised in that：The standard
Current transformer, test electronic current mutual inductor and electromagnetic current transducer by measure its it is internal set without electrification
Voltage in resistance, obtains measuring current value.
4. a kind of electronic current mutual inductor performance test system according to claim 1, it is characterised in that：The sampling
Rate adaptation module is sample rate judge module, for judging the actual sample rate of test electronic current mutual inductor.
5. a kind of electronic current mutual inductor performance test system according to claim 4, it is characterised in that：The sampling
Rate adaptation module judges that the specific deterministic process of test electronic current mutual inductor actual sample rate is：
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, once sent out before illustrating
Frame losing is given birth to, has judged that sample rate is 50kHz, sample rate deterministic process has terminated；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
6. a kind of electronic current mutual inductor method for testing performance, it is characterised in that comprise the following steps：
To standard current transformer, test electronic current mutual inductor input sync signal；
Test electronic current mutual inductor exports sampling value message to sample rate adaptation module, and sample rate adaptation module judges
After going out sample rate, the sample rate and the sampling value message for receiving are sent to combining unit module；Meanwhile, normalized current mutual inductance
Device exports sampling value message to combining unit module；
Combining unit module will test the sampling value message and mark of electronic current mutual inductor output according to the sample rate for receiving
The sampling value message of quasi- current transformer output is compared, and the measured value with standard current transformer is surveyed as standard value to examination
The precision for trying electronic current mutual inductor is verified.
7. a kind of electronic current mutual inductor method for testing performance according to claim 6, it is characterised in that also include：
To test electronic current mutual inductor and electromagnetic current transducer input sync signal；
Electromagnetic current transducer exports analog quantity to delay compensation module, test electronic current mutual inductor output sampled value report
Text is to delay compensation module；
The time of the sampling value message of the test electronic current mutual inductor output that delay compensation module will be received and electromagnetic type
The time of the real-time Simulation amount of current transformer output is compared, and test electronic mutual inductor sampling value message is mutual with respect to electromagnetism
The sampling time delay of the analog quantity of sensor output is Δ t, as compensation of delay when using, electronic current mutual inductance is tested when using
During the data that device is measured, its timestamp is needed to precompensation Δ t.
8. a kind of electronic current mutual inductor method for testing performance according to claim 7, it is characterised in that also including with
Lower step：Change primary side and be passed through electric current, precision and test in the ratio point record test electronic current mutual inductor drafted
The sampling time delay amount Δ t of electronic current mutual inductor.
9. a kind of electronic current mutual inductor method for testing performance according to claim 7, it is characterised in that：It is described to mark
The synchronous letter that quasi- current transformer, the synchronizing signal of test electronic current mutual inductor input are input into electromagnetic current transducer
Number produced by same signal generator.
10. a kind of electronic current mutual inductor method for testing performance according to claim 6, it is characterised in that：It is described to adopt
Sample rate adaptation module judges that the specific deterministic process of test electronic current mutual inductor actual sample rate is：
Self-test receives the moment of data for the first time after starting, start timing；
If receiving data in 20us points, judge that sample rate is 50kHz sample rates, sample rate deterministic process terminates；
If not receiving data in 20us points, judged again in 40us points, if receiving data, once sent out before illustrating
Frame losing is given birth to, has judged that sample rate is 50kHz, sample rate deterministic process has terminated；
If not receiving data in 40us points, it is judged to sample rate for 10kHz, sample rate deterministic process terminates.
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| CN111257813A (en) * | 2020-03-02 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Non-contact voltage measurement system field calibration method and calibration device thereof |
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