CN106680582A - Electronic transformer high-frequency acquisition and frequency-division transmission method and system - Google Patents
Electronic transformer high-frequency acquisition and frequency-division transmission method and system Download PDFInfo
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- CN106680582A CN106680582A CN201611041338.7A CN201611041338A CN106680582A CN 106680582 A CN106680582 A CN 106680582A CN 201611041338 A CN201611041338 A CN 201611041338A CN 106680582 A CN106680582 A CN 106680582A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/10—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods using digital techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
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Abstract
The invention relates to an electronic transformer high-frequency acquisition and frequency-division transmission method and system. The system comprises an electronic transformer primary side coil, an analog quantity acquisition module, an FPGA processing module, a high-speed serial fiber optic module and a gigabit fiber optic Ethernet module; a Rogowski coil and a low-power coil in the electronic transformer primary side coil respectively acquire current and voltage signals in a power transmission line and output first voltage analog signals and second voltage analog signals; the analog acquisition module converts the first voltage analog signals and the second voltage analog signals into digital signals at high speed; and the FPGA processing module controls sampling frequency and performs frequency-division processing on the digital signals. According to the electronic transformer high-frequency acquisition and frequency-division transmission method and system of the invention, a high-speed AD conversion chip and the FPGA processing module are adopted to realize control, so that the speed of data acquisition can be improved; high-frequency sampling data are divided into data of two different frequencies, and the data of two different frequencies are transmitted through using interface modules with different transmission rates, and therefore, the requirements of electric energy quality monitoring and traveling wave ranging of an electronic transformer-based power system can be simultaneously satisfied.
Description
Technical field
Gather and divide the present invention relates to signal acquisition and transmission technique field, more particularly to a kind of electronic mutual inductor high frequency
Keep pouring in transmission method and system.
Background technology
As the development of relay protection of power system, the raising of automation degree of equipment and the popularization of Fibre Optical Communication Technology should
With Intelligent transformer station has the trend for gradually replacing conventional substation, and electronic mutual inductor is used as the weight of Intelligent transformer station
Composing factor is wanted, becomes the focus of research and analysis.Wherein, with super-pressure, long range, large capacity transmission circuit increasingly
Many, being accurately positioned of line fault point seems and becomes more and more important that traveling wave ranging device plays more and more important effect.Also with
Plant-scale expansion, power quality problem becomes increasingly conspicuous, therefore, it is possible to carry out real-time monitoring, comprehensively analysis to the quality of power supply
And the equipment for monitoring power quality of breakdown judge turns into the visual plant of power system.
Traveling wave ranging device and equipment for monitoring power quality will be collected by electronic mutual inductor collection voltages signal
Voltage signal transmit to analog quantity sampling module, by A/D change analog quantity is converted into digital quantity, facilitate the follow-up of signal
Treatment Analysis.Current electric mutual inductor uses air core coil and low-power consumption iron-core coil, coil-induced current signal, output voltage
Signal.
But, the sample frequency of current electronic mutual inductor is general in below 12.8KHz, and equipment for monitoring power quality
It is required that signal sampling frequencies reach more than 50KHz, traveling wave ranging device then requires that sample frequency reaches more than 1MHz, therefore at present
Electronic mutual inductor can not meet traveling wave ranging device and equipment for monitoring power quality to high frequency, the requirement of mass data.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of based reminding method and device.
In order to solve the above-mentioned technical problem, the present invention provides following technical scheme：
The collection of electronic mutual inductor high frequency and frequency dividing transmission method that the present invention is provided, it is characterised in that methods described bag
Include：
The current signal of transmission line of electricity is gathered by Rogowski coil, first voltage analog signal is exported；By low work(
Rate coil gathers the electric current and voltage signal of transmission line of electricity, exports second voltage analog signal；
It is data signal by the first voltage analog signal and second voltage analog signal high-speed transitions；
The sample frequency of the data signal is controlled, scaling down processing is carried out to the data signal；
Data signal after scaling down processing is transmitted separately to traveling wave ranging device and equipment for monitoring power quality.
Preferably, it is described by the first voltage mould in the collection of above-mentioned electronic mutual inductor high frequency and frequency dividing transmission method
It is data signal to intend signal and second voltage analog signal high-speed transitions, is included before：
Low-pass filtering treatment is carried out respectively to the first voltage analog signal and second voltage analog signal；
Angle correct is carried out to the first voltage analog signal after filtering process.
Preferably, in the collection of above-mentioned electronic mutual inductor high frequency and frequency dividing transmission method, the control data signal
Sample frequency, scaling down processing is carried out to the data signal, specifically include：
Configuration AD sampling A/D chips, initialize A/D chip；
Export the sampling clock of 2MHz；
Data displacement is stored in temporary register in the frequency doubling clock rising edge of A/D chip；
It is data cached, read data and scaling down processing is carried out to data signal.
Preferably, it is described data cached in the collection of above-mentioned electronic mutual inductor high frequency and frequency dividing transmission method, read data
And scaling down processing is carried out to data signal, specifically include：
After the completion of the sampled data displacement once changed, temporary register is stored in the FIFO_ of high-frequency data buffer unit
A；
After every 200 times convert, the sampled value of 200 times is read in from the FIFO_A of the high-frequency data buffer unit,
The sampled value is combined into a frame multi-point sampling value message to send to traveling wave ranging device.
Preferably, it is described data cached in the collection of above-mentioned electronic mutual inductor high frequency and frequency dividing transmission method, read data
Scaling down processing is carried out to data signal, is specifically also included：
After the completion of every 40 sampled datas displacement, temporary register is stored in the FIFO_B mono- of high-frequency data buffer unit
It is secondary；
The sampled value in the FIFO_B of the high-frequency data buffer unit is read, and the sampled value is sent to electric energy matter
Amount monitoring device.
The electronic mutual inductor high frequency collection provided based on the present invention and frequency dividing transmission method, present invention also offers one kind
Electric mutual inductor high frequency is gathered and frequency dividing Transmission system, and the system includes：
Electronic mutual inductor first siding ring：Current signal for gathering transmission line of electricity, output voltage analog signal；
Analogue collection module：For being data signal by the voltage analog signal high-speed transitions；
FPGA processing modules：For controlling sample frequency, scaling down processing is carried out to the data signal；
High speed serialization optic module：Data is activation to electric energy quality monitoring for the FPGA processing modules to be exported is filled
Put；
Gigabit fiber optic Ethernet module：Data is activation to travelling wave ranging for the FPGA processing modules to be exported is filled
Put.
Preferably, in the collection of above-mentioned electric mutual inductor high frequency and frequency dividing Transmission system, the electronic mutual inductor primary side
Coil includes：
Rogowski coil：Current signal for gathering transmission line of electricity, exports first voltage analog signal；
Low-power coil：Electric current and voltage signal for gathering transmission line of electricity, export second voltage analog signal.
Preferably, during above-mentioned electric mutual inductor high frequency gathers and divide Transmission system, the analogue collection module includes：
First low-pass filter circuit：For being filtered treatment to the first voltage analog signal；
Integrating circuit：For carrying out angle correct to the first voltage analog signal after filtering process；
Second low-pass filter circuit：For being filtered treatment to the second voltage analog signal；
Ultra high speed A/D conversion circuit：For by pretreated first voltage analog signal and second voltage analog signal at a high speed
Be converted to data signal.
Preferably, during above-mentioned electric mutual inductor high frequency gathers and divide Transmission system, the FPGA processing modules include：
Data receipt unit：Data signal for receiving the ultra high speed A/D conversion circuit output；
High-frequency data buffer unit：For the data signal of data receipt unit output described in memory buffers；
Serial data transmitting element：For reading the data in the high-frequency data buffer unit, and the data are sent out
Deliver to the high speed serialization optic module；
Gigabit Ethernet controller unit：For reading the data in the high-frequency data buffer unit, and will be described
Data message is sent to the gigabit fiber optic Ethernet module.
The technical scheme that the present invention is provided can include the following benefits：
A kind of electronic mutual inductor high frequency that the present invention is provided is gathered and divided in transmission method and system, methods described bag
Include：The current signal of transmission line of electricity is gathered by Rogowski coil, first voltage analog signal is exported；By low-power coil
The electric current and voltage signal of transmission line of electricity are gathered, second voltage analog signal is exported；Analogue collection module is electric by described first
Pressure analog signal and second voltage analog signal high-speed transitions are data signal；FPGA processing modules control the data signal
Sample frequency, scaling down processing is carried out to the data signal；Data signal after scaling down processing is transmitted separately to travelling wave ranging
Device and equipment for monitoring power quality.The present invention improves data acquisition using ultra high speed A/D conversion chip and FPGA programming Controls
Speed, and high frequency sampled data is divided into two kinds of different frequencies, transmitted using the interface module of different transmission rates, Ke Yitong
When meet based on electronic mutual inductor electric power quality monitoring, the requirement of travelling wave ranging.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows and meets implementation of the invention
Example, and be used to explain principle of the invention together with specification.
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can also obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is that a kind of electronic mutual inductor high frequency provided in an embodiment of the present invention is gathered and the flow of frequency dividing transmission method is shown
It is intended to；
Fig. 2 is step in a kind of electronic mutual inductor high frequency collection provided in an embodiment of the present invention and frequency dividing transmission method
The detailed process schematic diagram of S300；
Fig. 3 is step in a kind of electronic mutual inductor high frequency collection provided in an embodiment of the present invention and frequency dividing transmission method
The detailed process schematic diagram of S304；
Fig. 4 is step in a kind of electronic mutual inductor high frequency collection provided in an embodiment of the present invention and frequency dividing transmission method
Another detailed process schematic diagram of S304；
Fig. 5 is that a kind of electronic mutual inductor high frequency provided in an embodiment of the present invention is gathered and the structure of frequency dividing Transmission system is shown
It is intended to；
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in implementation method do not represent and the consistent all implementation methods of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects being described in detail in claims, of the invention.
Referring to Fig. 1, the figure shows electronic mutual inductor high frequency provided in an embodiment of the present invention collection and frequency dividing transmission side
The flow chart of method.
S100:The current signal of transmission line of electricity is gathered by Rogowski coil, first voltage analog signal is exported；Pass through
Low-power coil gathers the electric current and voltage signal of transmission line of electricity, exports second voltage analog signal.
Specifically, electronic mutual inductor first siding ring includes Rogowski coil and low-power coil, wherein,
Rogowski coil is loop coil of the uniform winding on nonferromugnetic material, and output signal is the micro- of Current versus time
Divide, i.e. voltage signal, by a circuit being integrated to the voltage signal for exporting, it is possible to truly reduce input current,
And Rogowski coil have transient response speed it is fast, without magnetic saturation phenomenon the features such as, be highly suitable for positioning line fault failure
In the system of point.Electric current in Rogowski coil sensing transmission line of electricity, by the differential process of Current versus time, output first
Voltage analog signal；Electric current and voltage signal in the coil-induced transmission line of electricity of low-power, export second voltage analog signal.
S200：It is data signal by first voltage analog signal and second voltage analog signal high-speed transitions.
Specifically, for convenience for the treatment of first voltage analog signal and second voltage analog signal, first voltage is simulated and is believed
Number and second voltage analog signal carry out low-pass filtering treatment respectively, filter first voltage analog signal and second voltage simulation letter
High fdrequency component in number, to meet the requirement of travelling wave ranging and electric energy quality monitoring.
Additionally, Rogowski coil output is to primary side current signal time differential, the first voltage of output
90 ° advanced relative to the angle of primary side current signal of analog signal, therefore for convenience of the follow-up place of first voltage analog signal
Reason makes first voltage analog signal and primary side current signal angle, it is necessary to first voltage analog signal is integrated into treatment
Unanimously.
And the second voltage analog signal of low-power coil output is consistent with primary side signal angle, it is not required to by integration electricity
Road carries out angle correct, only need to carry out low-pass filtering treatment, the high fdrequency component in second voltage analog signal is filtered, to meet electricity
The requirement of energy quality-monitoring.
S300：The sample frequency of the data signal is controlled, scaling down processing is carried out to the data signal.
Specifically, the sample frequency of data signal is controlled by FPGA processing modules, by the sample frequency of data signal point
It is 50KHz and 2MHz, specific dividing method is as shown in Figure 2:
S301:Configuration AD sampling A/D chips, initialize A/D chip.
Specifically, after the collection of electronic mutual inductor high frequency and frequency dividing Transmission system that the present invention is provided are powered, FPGA treatment
Module is initialized to A/D chip, configures A/D chip.
S302：Export the sampling clock of 2MHz.
Specifically, FPGA processing modules export the sampling clock of 2MHz, it is ensured that 2,000,000 sampled values of conversion in 1s, improve
The processing speed of sampled value.
S303：Data displacement is stored in temporary register in the frequency doubling clock rising edge of A/D chip.
S304：It is data cached, read data and scaling down processing is carried out to data signal.
Specifically, after sampled data is converted, temporary register is stored in high-frequency data buffer unit, reads frequency high
According to the data in buffer unit, data are divided into the different sample frequency of 50KHz with 2MHz2 kinds, 2MHz sample frequencys it is specific
Scaling down processing method is as shown in Figure 3：
S3041：After the completion of the sampled data displacement once changed, temporary register is stored in high-frequency data buffer unit
FIFO_A。
S3042：After every 200 times convert, read in 200 times from the FIFO_A of the high-frequency data buffer unit and adopt
Sample value, is combined into sampled value a frame multi-point sampling value message and sends to traveling wave ranging device.
Specifically, the sample frequency that traveling wave ranging device is required is for 2MHz, i.e. 1s change 2,000,000 sampled datas, the side of being
Just this 2,000,000 sampled datas are transmitted, 200 samplings for converting is read from the FIFO_A of high-frequency data buffer unit
Value, and 200 sampled values are combined into a frame, necessity field composition message such as header is added, then message is sent to traveling wave survey
Away from device.
The specific scaling down processing method of 50KHz sample frequencys is as shown in Figure 4：
S3043：After the completion of every 40 sampled datas displacement, temporary register is stored in high-frequency data buffer unit
FIFO_B is once.
S3044：Read the sampled value in the FIFO_B of the high-frequency data buffer unit, and by the sampled value send to
Equipment for monitoring power quality.
Specifically, the sample frequency of equipment for monitoring power quality requirement changes 50,000 sampled datas for 50KHz, i.e. 1s, is
It is 50,000 sampled datas by 2,000,000 sampled data scaling down processings, temporary register is stored in high-frequency data caching by every 40 samplings
The FIFO_B of unit once, only takes a sampled value, can so retain 50,000 sampled values；And the sampled value for retaining is sent to electricity
Can quality monitoring device.
The collection of electronic mutual inductor high frequency and frequency dividing transmission method that the present invention is provided pass through electronic mutual inductor primary side
Coil (Rogowski coil and low-power coil) gathers the electric current and voltage signal of transmission line of electricity respectively, and the first electricity is exported respectively
Pressure analog signal and second voltage analog signal, to avoid the high frequency in first voltage analog signal and second voltage analog signal
Component interference, the high fdrequency component in signal is filtered by low pass filter；Due to Rogowski coil output is to one
Secondary side current signal time differential, the first voltage analog signal of output is advanced relative to the angle of primary side current signal
90 °, therefore the angle of first voltage analog signal is corrected by integrating circuit so that make first voltage analog signal and primary side
Current signal angle is consistent；Then first voltage analog signal and second voltage analog signal are converted into data signal, it is convenient
Subsequent processing units identifying processing；After being converted to data signal, data signal is cached in high-frequency data buffer unit, from height
200 sampled values are read in frequency data buffer storage unit, and 200 sampled values are combined into a frame message and sent to travelling wave ranging dress
Put, meet the sample frequency of traveling wave ranging device 2MHz；Every 40 samplings are stored in high-frequency data buffer unit once, only take wherein
One sampled value, so as to transmit 50,000 sampled values, meets the sample frequency of equipment for monitoring power quality 50KHz.The present invention is provided
The collection of electronic mutual inductor high frequency and frequency dividing transmission method the sample frequency of 50KHz and 2MHz can be provided simultaneously, while full
Sufficient equipment for monitoring power quality and traveling wave ranging device are to high frequency, the requirement of mass data.
The electronic mutual inductor high frequency collection provided based on the present invention and frequency dividing transmission method, present invention also offers one kind
Electronic mutual inductor high frequency is gathered and frequency dividing Transmission system, as shown in Figure 5.
Electronic mutual inductor high frequency collection and frequency dividing Transmission system include electronic mutual inductor first siding ring 100,
Analogue collection module 200, FPGA processing modules 300, high speed serialization optic module 400 and gigabit fiber optic Ethernet module
500, wherein：
Electronic mutual inductor first siding ring 100：Current signal for gathering transmission line of electricity, output voltage simulation letter
Number.Electronic type first siding ring gathers current signal according to electromagnetic induction principle, and output voltage signal, its course of work is as follows：
Electronic mutual inductor first siding ring is arranged near transmission line of electricity, the current signal of transmission line of electricity is gathered, when tested power transmission line
In electric current pass through electronic type first siding ring when, electronic mutual inductor first siding ring produce respective change magnetic field, coil
The voltage that two ends sensing is produced and electric current into certain relation.
Electronic mutual inductor first siding ring 100 includes Rogowski coil 101 and low-power coil 102, wherein:
Rogowski coil 101:Current signal for gathering transmission line of electricity, exports first voltage analog signal.
Rogowski coil is that copper cash is wrapped on non-ferromagnetic skeleton to be made, due to Rogowski coil difference iron core, without magnetic saturation
Phenomenon, can measure large-scale electric current, can be from several amperes to several kiloamperes；Due to being magnetically coupled without iron core, so as to disappear
Except magnetic saturation, higher order resonances phenomenon, operation stability is more preferable；And Rogowski coil transient state corresponding speed is fast, works as appearance
During failure, reaction speed is very fast, can be accurately positioned abort situation, is highly suitable to be applied in traveling wave ranging device.
Low-power coil 102:Electric current and voltage signal for gathering transmission line of electricity, export second voltage analog signal.
Compared with Rogowski coil, although low-power coil transient response speed is relatively low, certainty of measurement is high.
Analogue collection module 200：For being pre-processed to first voltage analog signal and second voltage analog signal,
And by pretreated first voltage analog signal and second voltage analog signal high-speed transitions be data signal.
Analogue collection module 200 includes the first low-pass filter circuit 201, integrating circuit 202, the second low-pass filter circuit
203 and ultra high speed A/D conversion circuit 204, wherein：
First low-pass filter circuit 201：For filtering the high fdrequency component in first voltage analog signal, high fdrequency component is prevented
The accuracy of measurement of interference voltage signal.
Integrating circuit 202：Angular deviation for correcting first voltage analog signal.Because Rogowski coil 101 is defeated
Go out be to primary side current signal time differential, therefore output first voltage analog signal relative to primary side current
Advanced 90 ° of the angle of signal, the subsequent treatment of first voltage analog signal is, it is necessary to first voltage analog signal is carried out for convenience
Integral Processing, makes first voltage analog signal consistent with primary side current signal angle.Preferably, integrating circuit 202 be resistance,
The active integrating circuit of electric capacity and operational amplifier composition.
Second low-pass filter circuit 203：For filtering the high fdrequency component in second voltage analog signal, high fdrequency component is prevented
The accuracy of measurement of interference voltage signal.
Ultra high speed A/D conversion circuit 204：For by pretreated first voltage analog signal and second voltage analog signal
High-speed transitions are data signal, facilitate the identification and treatment of subsequent processing units.Preferably, ultra high speed A/D conversion circuit 204 is used
The AD9228 multichannel high sampling rate AD conversion chips of ADI companies.
To meet the requirement of traveling wave ranging device and equipment for monitoring power quality sample frequency, Rogowski coil simultaneously
101 output end connects the input of the first low-pass filter circuit 201, the output end connection product of the first low-pass filter circuit 201
The input of parallel circuit 202, the output end of integrating circuit 202 connects the input of ultra high speed A/D conversion circuit 204；Similarly, low work(
The output end of rate coil 102 connects the input of the second low-pass filter circuit 203, the output end of the second low-pass filter circuit 203
Connect the input of ultra high speed A/D conversion circuit 204.
FPGA processing modules 300：For controlling sample frequency, scaling down processing is carried out to data signal, and by scaling down processing
Data signal afterwards is respectively sent to equipment for monitoring power quality and traveling wave ranging device.Preferably, FPGA processing modules
Fpga chip is the CycloneIV devices of Altera.
It is single that FPGA processing modules 300 include that data receipt unit 301, high-frequency data buffer unit 302, serial data send
Unit and gigabit Ethernet controller unit, wherein：
Data receipt unit 301：Data signal for receiving the output of analogue collection module 200.
High-frequency data buffer unit 302：For being sampled to the data signal in receiving unit 301, and by hits
Stored according to sampled value is converted to, wherein, after the completion of sampled data displacement each time, sampled value is stored in high-frequency data caching
The FIFO_A of unit is once；After the completion of every 40 sampled datas displacement, sampled value is stored in the FIFO_ of high-frequency data buffer unit
B is once.
Gigabit Ethernet controller unit 303：For adopting in the FIFO_A for reading, sending high-frequency data buffer unit
Sample value, reads the sampled value in 200 FIFO_A of high-frequency data buffer unit, and 200 sampled values are combined into a frame, plus
First-class necessary field composition message is reported, then message is sent to gigabit fiber optic Ethernet module 500.Preferably, gigabit
Ethernet controller unit 303 examines existing using the ethernet ip of altera corp.
Serial data transmitting element 304：For the sampled value in the FIFO_B for reading, sending high-frequency data buffer unit,
The sampled value in the FIFO_B of high-frequency data buffer unit is read, and sampled value is sent to high speed serial optical fiber module 400.It is excellent
Choosing, the data frame of serial data transmitting element 304 is constituted according to the stipulations of power industry standard DL/T 282.
For convenience of the scaling down processing of sampled data, the output end connection data receipt unit 301 of ultra high speed A/D conversion circuit 204
Input, the input of the output end connection high-frequency data buffer unit 302 of data receipt unit 301, high-frequency data caching
The output end of unit 302 connects the input of gigabit Ethernet controller unit 303 and serial data transmitting element 304 respectively
End, the input of the output end connection gigabit fiber optic Ethernet module 500 of gigabit Ethernet controller unit 303, serially
The input of the output end connection high speed serialization optic module 400 of data transmission unit 304.
High speed serialization optic module 400：Sampled value for receiving the output of serial data transmitting element 304, and will sampling
Value is sent to equipment for monitoring power quality.Preferably, high speed serialization optic module uses the HFBR1414 optical modes of AVAGO companies
Block.
Gigabit fiber optic Ethernet module 500：Message for receiving the output of gigabit Ethernet controller unit 303,
And send to traveling wave ranging device message.Preferably, gigabit fiber optic Ethernet module uses MARVELL companies
88E1111PHY chips
The collection of electronic mutual inductor high frequency and frequency dividing Transmission system that the present invention is provided include electronic mutual inductor primary side
Coil, analogue collection module, FPGA processing modules, high speed serialization optic module and gigabit fiber optic Ethernet module, wherein,
Electronic mutual inductor first siding ring gathers the electric current of transmission line of electricity, voltage signal respectively, and first voltage simulation letter is exported respectively
Number and second voltage analog signal；Analogue collection module is used to enter first voltage analog signal and second voltage analog signal
Row pretreatment, and pretreated first voltage analog signal and second voltage analog signal are converted into data signal；FPGA
Processing module is used to control sample frequency, and scaling down processing is carried out to data signal, respectively obtains the sampling of 50KHz and 2MHz frequently
Rate；High speed serialization optic module is used to send the sampled value of 50KHz sample frequencys to equipment for monitoring power quality；Gigabit light
Fine ethernet module is used to send the sampling value message of 2MHz sample frequencys to traveling wave ranging device.The electronics that the present invention is provided
Formula transformer high frequency is gathered and frequency dividing Transmission system is by for the Rogowski coil of travelling wave ranging and for electric energy quality monitoring
The low-power coil combination of device is arranged in an electronic mutual inductor, using ultra high speed A/D conversion circuit and FPGA processing modules
The speed of data acquisition is improve, and high frequency sampled data is divided into two kinds of different frequencies, passed using different interface modules
It is defeated, while meeting electric power quality monitoring, the requirement of travelling wave ranging based on electronic mutual inductor；Meanwhile, use
Gigabit fiber optic Ethernet transmits the high-frequency data of 2MHz sample frequencys, it is ensured that the degree of accuracy of data transfer.
Those skilled in the art considering specification and practice here after disclosure of the invention, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture being described above and be shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (9)
1. a kind of electronic mutual inductor high frequency is gathered and frequency dividing transmission method, it is characterised in that methods described includes：
The current signal of transmission line of electricity is gathered by Rogowski coil, first voltage analog signal is exported；By low-power line
The electric current and voltage signal of circle collection transmission line of electricity, export second voltage analog signal；
It is data signal by the first voltage analog signal and second voltage analog signal high-speed transitions；
The sample frequency of the data signal is controlled, scaling down processing is carried out to the data signal；
Data signal after scaling down processing is transmitted separately to traveling wave ranging device and equipment for monitoring power quality.
2. electronic mutual inductor high frequency according to claim 1 is gathered and frequency dividing transmission method, it is characterised in that described to incite somebody to action
The first voltage analog signal and second voltage analog signal high-speed transitions are data signal, are included before：
Low-pass filtering treatment is carried out respectively to the first voltage analog signal and second voltage analog signal；
Angle correct is carried out to the first voltage analog signal after filtering process.
3. electronic mutual inductor high frequency according to claim 1 is gathered and frequency dividing transmission method, it is characterised in that the control
The sample frequency of the data signal is made, scaling down processing is carried out to the data signal, specifically included：
Configuration AD sampling A/D chips, initialize A/D chip；
Export the sampling clock of 2MHz；
Data displacement is stored in temporary register in the frequency doubling clock rising edge of A/D chip；
It is data cached, read data and scaling down processing is carried out to data signal.
4. electronic mutual inductor high frequency according to claim 3 is gathered and frequency dividing transmission method, it is characterised in that described slow
Deposit data, reads data and carries out scaling down processing to data signal, specifically includes：
After the completion of the sampled data displacement once changed, temporary register is stored in the FIFO_A of high-frequency data buffer unit；
After every 200 times convert, the sampled value of 200 times is read in from the FIFO_A of the high-frequency data buffer unit, by institute
State sampled value and be combined into a frame multi-point sampling value message and send to traveling wave ranging device.
5. electronic mutual inductor high frequency according to claim 3 is gathered and frequency dividing transmission method, it is characterised in that described slow
Deposit data, reading data logarithm word signal carries out scaling down processing, specifically also includes：
After the completion of every 40 sampled datas displacement, the FIFO_B that temporary register is stored in into high-frequency data buffer unit is once；
The sampled value in the FIFO_B of the high-frequency data buffer unit is read, and the sampled value is sent to quality of power supply prison
Survey device.
6. a kind of electric mutual inductor high frequency is gathered and frequency dividing Transmission system, it is characterised in that including：
Electronic mutual inductor first siding ring：Current signal for gathering transmission line of electricity, output voltage analog signal；
Analogue collection module：For being data signal by the voltage analog signal high-speed transitions；
FPGA processing modules：For controlling sample frequency, scaling down processing is carried out to the data signal；
High speed serialization optic module：For the data is activation that exports the FPGA processing modules to equipment for monitoring power quality；
Gigabit fiber optic Ethernet module：For the data is activation that exports the FPGA processing modules to traveling wave ranging device.
7. electric mutual inductor high frequency according to claim 6 is gathered and frequency dividing Transmission system, it is characterised in that the electronics
Formula transformer first siding ring includes：
Rogowski coil：Current signal for gathering transmission line of electricity, exports first voltage analog signal；
Low-power coil：Electric current and voltage signal for gathering transmission line of electricity, export second voltage analog signal.
8. electric mutual inductor high frequency according to claim 7 is gathered and frequency dividing Transmission system, it is characterised in that the simulation
Amount acquisition module includes：
First low-pass filter circuit：For being filtered treatment to the first voltage analog signal；
Integrating circuit：For carrying out angle correct to the first voltage analog signal after filtering process；
Second low-pass filter circuit：For being filtered treatment to the second voltage analog signal；
Ultra high speed A/D conversion circuit：For by pretreated first voltage analog signal and second voltage analog signal high-speed transitions
It is data signal.
9. electric mutual inductor high frequency according to claim 8 is gathered and frequency dividing Transmission system, it is characterised in that the FPGA
Processing module includes：
Data receipt unit：Data signal for receiving the ultra high speed A/D conversion circuit output；
High-frequency data buffer unit：For the data signal of data receipt unit output described in memory buffers；
Serial data transmitting element：For reading the data in the high-frequency data buffer unit, and by the data is activation extremely
The high speed serialization optic module；
Gigabit Ethernet controller unit：For reading the data in the high-frequency data buffer unit, and by the data
Message is sent to the gigabit fiber optic Ethernet module.
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