CN107490719A - Electronic mutual inductor based on Rogowski coil principle in GIS - Google Patents
Electronic mutual inductor based on Rogowski coil principle in GIS Download PDFInfo
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- CN107490719A CN107490719A CN201710677341.6A CN201710677341A CN107490719A CN 107490719 A CN107490719 A CN 107490719A CN 201710677341 A CN201710677341 A CN 201710677341A CN 107490719 A CN107490719 A CN 107490719A
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- mutual inductor
- electronic mutual
- combining unit
- gis
- rogowski coil
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to the electronic mutual inductor based on Rogowski coil principle in a kind of GIS, it is characterized in that, electronic mutual inductor includes remote end module and combining unit two parts, described remote end module mainly includes 4 rank low-pass Bessel ripples, high-speed, high precision analog-to-digital conversion and Software Integration, after the low pass signal filtering exported by 4 rank Bessel filters to electronic mutual inductor sensing element, high-speed sampling is carried out by the timing of high-precision adc part, sampled signal is integrated by software discrete integration algorithm again and reduced, realize to primary current, the measurement of voltage, combining unit is sent to by high speed serialization agreement evidence through electro-optic conversion, combining unit completes multi-channel data synchronization and data sharing.The present invention effectively increases the electronic mutual inductor operational reliability of GIS application Rogowski coil principles.
Description
Technical field：
The present invention relates to the electronic mutual inductor based on Rogowski coil principle in a kind of GIS, belongs to power system fortune inspection skill
Art field.
Background technology：
Electronic mutual inductor in current domestic field application GIS is mutual based on Rogowski coil principle electricity electronic type mostly
Sensor, due to Rogowski coil principles electronic formula transformer output for direct proportion in primary current time differential signal, so
The quality of its integral element will directly affect the temporary steady-state behaviour of electronic mutual inductor.What use was more at present is following two
Scheme：First, being integrated using hardware, analog integration loop is built to realize by operational amplifier, resistance and capacitance electronic component
The reduction of signal；Second, realizing signals revivification by combining unit Software Integration, collector is merely responsible for low pass signal filtering acquisition.
All there are certain technical disadvantages in both schemes, hardware integration is because its precision and reliability are by from electronic component
The limitation of electric parameter, so its precision and reliability have risk, the Software Integration that combining unit is realized is limited by collection
Sampling bandwidth and the transmission rate limitation of device, the distortion of its signal especially high-frequency signal cause integral element abnormal.
The content of the invention：
The present invention, which provides one kind, can overcome drawbacks described above, improve in the GIS of operational reliability and be based on Rogowski coil principle
Electronic mutual inductor.
Electronic mutual inductor based on Rogowski coil principle in GIS, it is characterized in that, electronic mutual inductor includes remote end module
With combining unit two parts, described remote end module mainly include 4 rank low-pass Bessel ripples, high-speed, high precision analog-to-digital conversion and
Software Integration, after the low pass signal filtering exported by 4 rank Bessel filters to electronic mutual inductor sensing element, by high-precision
Spend modulus switching device timing and carry out high-speed sampling, then sampled signal is integrated by software discrete integration algorithm and reduced, it is real
Now to the measurement of primary current, voltage, combining unit, combining unit are sent to by high speed serialization agreement evidence through electro-optic conversion
Complete multi-channel data synchronization and data sharing.
The beneficial effects of the invention are as follows：
The present invention is proposed using the quadravalence Bessel filter that filtering characteristic is excellent in signal condition loop, with much
High-speed sampling higher than system bandwidth reduces the possibility of frequency alias, and digital integration link moves forward for high-speed sampling
Realized to remote end module and using FPGA.Thus can accurate measurement primary current signal, and can significantly eliminate GIS transient state mistakes
High-frequency capacitive current caused by journey enters sampling circuit and causes the wave distortion after Software Integration to influence, and effectively increasing GIS should
With the electronic mutual inductor operational reliability of Rogowski coil principle.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the present invention is further detailed explanation：
Fig. 1 is the electronic mutual inductor schematic diagram of the Rogowski coil principle applied to GIS；
Fig. 2 is FPGA Software Integration flow charts.
Specific embodiment：
As shown in Figure 1-2
(1) scheme overall architecture designs
In order to solve problems present in above-mentioned Software Integration, the present invention targetedly proposes a set of improved
Sample integration solution, the architecture design of system is as shown in Figure 1.
Sample integration scheme includes electronic transformer collector (remote end module) and combining unit two parts.Remote end module
Mainly include 4 rank low-pass Bessel ripples, high-speed, high precision analog-to-digital conversion, Software Integration, by 4 rank Bessel filters to electricity
After the low pass signal filtering of minor transformer sensing element output, high-speed is carried out by the timing of high-precision adc part and adopted
Sample, then sampled signal is integrated by software discrete integration algorithm and reduced, the measurement to primary current, voltage is realized, through electricity
Light conversion completes multi-channel data synchronization and data sharing by high speed serialization agreement according to combining unit, combining unit is sent to.
(2) the remote end module integration based on FPGA is realized
FPGA Software Integrations algorithm flow is as shown in Figure 2.
Sampling rate is improved to 100kHz, frequency alias phenomenon, and the amplitude versus frequency characte of integral function can be eliminated
It is more preferable, but it is the increase in the sampled data output in the unit interval.If still select Software Integration function is single by merging
Member is implemented to complete, then the sampled data for needing in the unit interval to roll up is transferred to combining unit.Sampling rate 100kHz,
It is assumed that with every point sampling value minimum data amount=(measurement of 2 protection+1) each byte remote end module states of 2 byte of data length+1 of *
The byte of+1 byte CRC check position=8 calculates, per second to need secured transmission of payload data 6.4MBit, is provided far beyond IEC60044-8 agreements
Physical link bandwidth requirement.The data transfer bandwidth bottleneck problem brought is improved to solve sampling rate, integral algorithm is transferred to
Remote end module is completed.Remote end module internal processor FPGA takes value sequence to carry out the centrifugal pump of reading using z matched transforms
Computing, so as to which reduction obtains measured signal, and according to application demands such as combining unit 4kHz or 12.8kHz sampling rates, far
FPGA built in end module enables Interruption 2, enters row interpolation resampling to the measured signal after reduction, and A/D is improved so as to realize
In the case of sampling rate, do not increase data transfer bandwidth.And 100kHz original sampling datas are supported to export, for science from now on
Research and advanced application provide technical foundation.
Above-mentioned case study on implementation is only for clear example of the present invention, and is not the limit to embodiment of the present invention
It is fixed.The obvious changes or variations amplified out the spirit for belonging to the present invention is still in protection scope of the present invention.
Claims (1)
1. the electronic mutual inductor based on Rogowski coil principle in a kind of GIS, it is characterized in that, electronic mutual inductor includes distal end mould
Block and combining unit two parts, described remote end module mainly include 4 rank low-pass Bessel ripples, high-speed, high precision analog-to-digital conversion
And Software Integration, after the low pass signal filtering exported by 4 rank Bessel filters to electronic mutual inductor sensing element, by height
The timing of precision modulus switching device carries out high-speed sampling, then sampled signal is integrated by software discrete integration algorithm and reduced,
The measurement to primary current, voltage is realized, through electro-optic conversion by high speed serialization agreement according to combining unit is sent to, is merged single
Member completes multi-channel data synchronization and data sharing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677341.6A CN107490719A (en) | 2017-08-09 | 2017-08-09 | Electronic mutual inductor based on Rogowski coil principle in GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710677341.6A CN107490719A (en) | 2017-08-09 | 2017-08-09 | Electronic mutual inductor based on Rogowski coil principle in GIS |
Publications (1)
| Publication Number | Publication Date |
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| CN107490719A true CN107490719A (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710677341.6A Pending CN107490719A (en) | 2017-08-09 | 2017-08-09 | Electronic mutual inductor based on Rogowski coil principle in GIS |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085421A (en) * | 2018-09-29 | 2018-12-25 | 无锡北科自动化科技有限公司 | A kind of integral integration module |
| CN109884568A (en) * | 2019-01-17 | 2019-06-14 | 国网浙江省电力有限公司金华供电公司 | A kind of intelligent substation main transformer sample-synchronous calibration equipment and test method |
| CN110441593A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | A kind of Rogowski coil current signal acquisition system and acquisition method |
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| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN203259644U (en) * | 2013-07-05 | 2013-10-30 | 国家电网公司 | Electronic transformer interference signal test system in GIS (Geographic Information System) based on high-speed sampling |
| CN103487780A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | System and method for testing GIS electronic transformer |
| CN103513093A (en) * | 2013-09-17 | 2014-01-15 | 国家电网公司 | Electronic transformer collector based on 4-order Bessel filtration and software integration |
| US20170083069A1 (en) * | 2015-09-18 | 2017-03-23 | Apple Inc. | Current and input voltage sense circuit for indirectly measuring regulator current |
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2017
- 2017-08-09 CN CN201710677341.6A patent/CN107490719A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208360A (en) * | 2013-03-21 | 2013-07-17 | 许继集团有限公司 | Electronic-type current-voltage-combined transformer for GIS (gas insulated switchgear) |
| CN203259644U (en) * | 2013-07-05 | 2013-10-30 | 国家电网公司 | Electronic transformer interference signal test system in GIS (Geographic Information System) based on high-speed sampling |
| CN103487780A (en) * | 2013-09-09 | 2014-01-01 | 国家电网公司 | System and method for testing GIS electronic transformer |
| CN103513093A (en) * | 2013-09-17 | 2014-01-15 | 国家电网公司 | Electronic transformer collector based on 4-order Bessel filtration and software integration |
| US20170083069A1 (en) * | 2015-09-18 | 2017-03-23 | Apple Inc. | Current and input voltage sense circuit for indirectly measuring regulator current |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085421A (en) * | 2018-09-29 | 2018-12-25 | 无锡北科自动化科技有限公司 | A kind of integral integration module |
| CN109884568A (en) * | 2019-01-17 | 2019-06-14 | 国网浙江省电力有限公司金华供电公司 | A kind of intelligent substation main transformer sample-synchronous calibration equipment and test method |
| CN109884568B (en) * | 2019-01-17 | 2021-09-07 | 国网浙江省电力有限公司金华供电公司 | Main transformer sampling synchronism verification device and testing method for intelligent substation |
| CN110441593A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | A kind of Rogowski coil current signal acquisition system and acquisition method |
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Application publication date: 20171219 |
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