CN109116289A - A kind of real-time acquisition system of high-voltage mutual inductor group operating status - Google Patents
A kind of real-time acquisition system of high-voltage mutual inductor group operating status Download PDFInfo
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- CN109116289A CN109116289A CN201811362008.7A CN201811362008A CN109116289A CN 109116289 A CN109116289 A CN 109116289A CN 201811362008 A CN201811362008 A CN 201811362008A CN 109116289 A CN109116289 A CN 109116289A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- G—PHYSICS
- G04—HOROLOGY
- G04R—RADIO-CONTROLLED TIME-PIECES
- G04R20/00—Setting the time according to the time information carried or implied by the radio signal
- G04R20/02—Setting the time according to the time information carried or implied by the radio signal the radio signal being sent by a satellite, e.g. GPS
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Abstract
The invention discloses a kind of real-time acquisition systems of high-voltage mutual inductor group operating status, including synchronization module, acquisition module, merging module, output module；Synchronization module includes Beidou/GPS receiver module and synchronously control nucleus module；Synchronization module receives Beidou/GPS signal and provides PPS pulse and provide time signal, while the real-time synchronization between multiple acquisition systems being supported to acquire；Acquisition module realizes the A/D sampling and Characteristic Extraction of output electric simulation signal secondary to multiple groups mutual inductor；Merging module merges the Characteristic Extraction result of multichannel, and extracts absolute time from Beidou/GPS time signal；Output module is used to as a result can be used for the real-time assessment to mutual inductor group kinematic error to local terminal and remote terminal transmission collection result.The present invention acquires when realizing the synchronization high-precision real of multiple groups mutual inductor running state data in electric power networks, and the assessment for mutual inductor group kinematic error provides data basis.
Description
Technical field
The present invention relates to the real-time acquisition systems of high-voltage mutual inductor group a kind of, and in particular to a kind of high-voltage mutual inductor group operation
The real-time acquisition system of state.
Background technique
High-voltage mutual inductor group is used to measure the high current and high voltage of electric system, and it is also most heavy for providing most basic for power grid
The metric data wanted.Electric power mutual-inductor is considered as " eyes " and " ear " of electric system, and electric power mutual-inductor is large number of, according to not
Statistics completely, only 220kV and above electric power mutual-inductor quantity are just more than 200,000 for nationwide integrated power grid in 2015,110kV
And above is more than 1,000,000.With the propulsion that China's smart grid is built, electronic mutual inductor, digitlization merge
The New Sensing Technologies such as unit and data transmission technology are gradually promoted, compared with traditional electric power mutual-inductor CT and PT, new skill
The measurement error of art is more unstable, changing rule is more complicated, and tracking its kinematic error becomes more necessary and urgent.According to for many years
Field operation experiences, there may be overproof situations in the process of running for mutual inductor, directly influence the accuracy of electrical energy measurement, from
And the fair of electricity transaction is influenced with accurately, serious conditions even can threaten electric power netting safe running；Monitor mutual inductor group fortune
Row error is to guarantee the effective measures of accuracy of instrument transformers, maintenance power system stability operation.In existing error detection method, lead to
Often the mutual inductor run under high pressure conditions is examined and determine with the verification that periodically has a power failure, but this kind of method, which exists to have a power failure, influences electricity
Net operation can not accurately detect many difficulties such as actual motion error, calibration operation amount be huge, and charge verification and also send out in technology
During exhibition, there is also the deficiencies of safety portability etc., are not used widely.
Kinematic error in order to accurately track and fortune mutual inductor group is held in, needs a kind of high-voltage mutual inductor group
The real-time acquisition system of operating status, the operation result of real-time acquisition and recording monitoring mutual inductor group, to carry out transformer error shape
The assessment of state provides accurate data basis, to obtain real-time, accurate, reliable mutual inductor kinematic error.
Summary of the invention
In view of the above-mentioned problems, the invention proposes a kind of real-time acquisition system of high-voltage mutual inductor group operating status, purpose exists
It acquires when realizing the synchronization high-precision real of multiple groups mutual inductor running state data in electric power networks, is missed for the operation of mutual inductor group
The assessment of difference provides data basis.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of high-voltage mutual inductor group operating status is real-time
Acquisition system, design feature are to include synchronization module, acquisition module, merging module, output module；Synchronization module includes north
Bucket/GPS receiver module and synchronously control nucleus module；The synchronization module receives the multi-pass that Beidou/GPS signal is acquisition module
Road provides PPS pulse and provides time signal for data combiners block, while supporting the real-time synchronization between multiple acquisition systems
Acquisition；The acquisition module realizes the A/ of output electric simulation signal secondary to multiple groups mutual inductor based on A/D+FPGA+DSP framework
D sampling and Characteristic Extraction；The merging module merges the Characteristic Extraction result of multichannel, and believes from Beidou/GPS time service
Absolute time is extracted in number, adds markers for the multiple groups characteristic quantity result after merging；The output module is used for local terminal
With remote terminal transmission collection result, it as a result can be used for the real-time assessment to mutual inductor group kinematic error.
There is the Beidou/GPS receiver module satellite signal receiving antenna and satellite-signal processing module, satellite-signal to connect
It receives antenna and supports Beidou/GPS signal dual mode reception；Satellite-signal processing module exports Beidou/GPS signal processing PPS seconds
Pulse signal and rs 232 serial interface signal containing absolute time information.
The synchronously control nucleus module is realized based on FPGA, receives PPS second pulse signal, and synchronism output 6 road PPS seconds
Pulse signal is used for acquisition module is synchronous.
The acquisition module is divided into voltage acquisition module and current acquisition module, voltage acquisition module and current acquisition module
It can all realize acquisition and the processing to 6 channel voltages or current signal, realize to 6 groups of 36 channel three-phase mutual inductor operating status
Real-time synchronization acquisition.
The voltage acquisition module is able to achieve voltage transformation, voltage acquisition and voltage characteristic amount and extracts；Voltage transformation passes through
The voltage rating of secondary output is converted into the small voltage less than voltage rating by high precision small PT, and voltage acquisition module is with synchronization
The PPS pulse per second (PPS) of module output is trigger collection, and the analog-to-digital conversion of voltage signal, voltage characteristic are realized with the frequency acquisition of setting
Amount, which is extracted, realizes extraction to voltage sample value sequence characteristic value by high-precision Floating-point DSP, can extract signal fundamental wave, three
Subharmonic, quintuple harmonics frequency, amplitude, phase, and according to the zero sequence and negative phase-sequence degree of unbalancedness of three-phase result calculating voltage, finally
Specific result is output to merging module with particular frame format with serial port form.
The current acquisition module realizes that current transformation, current acquisition and current characteristic amount are extracted, and current transformation passes through height
The rated current of secondary output is converted into the low current less than rated current by precision Small-sized C T, and current acquisition is first adopted with high precision
Sample resistance versus current signal carries out analog sampling, then using the PPS pulse per second (PPS) of synchronization module output as trigger collection, with adopting for setting
Collect the analog-to-digital conversion that frequency realizes current signal, current characteristic amount, which is extracted, to be realized by high-precision Floating-point DSP to current sampling data
The extraction of sequence features can extract the fundamental wave, triple-frequency harmonics, quintuple harmonics frequency, amplitude, phase of signal, and according to three
The zero sequence and negative phase-sequence degree of unbalancedness of phase result calculating current, are finally exported specific result with particular frame format with serial port form
To merging module.
The merging module has the serial ports receiving module in 7 channels and merges control core module.
The serial ports connection module in 7 channel receives the collection result and Beidou/GPS receiver module output of acquisition module output
The time service time；The merging control core synchronization process collection result and time service time signal；By multiple groups collection result data
It is merged into a data frame, and extracts current absolute time from time service time signal, adds accurate markers for collection result.
The high-precision Floating-point DSP is to receive the sample values report of FPGA transmission by SPI communication and parse, then
DSP calculates fundamental wave, the harmonic frequency, amplitude, phase that every phase signals are calculated by Interpolating Window FFT Algorithm, to three-phase voltage/electricity
The fundamental wave of stream is handled, and residual voltage, positive sequence voltage, negative sequence voltage can be sought, so as to residual voltage degree of unbalancedness and
Negative sequence voltage degree of unbalancedness；Interpolating Window FFT Algorithm is implemented as follows: carrying out 1024: 43 ranks to time domain discrete sampling number first
Treated data are carried out base 2FFT operation by Nuttall window adding window truncation, can be with after modulus and phase angle process
The amplitude spectrum and phase spectrum of signal discrete are obtained, the left and right two of the maximum spectral line and maximum spectral line that then find amplitude spectrum is composed
Line acquires the maximum of points of signal spectrum finally by three spectral line interpolations, can acquire the frequency, amplitude and phase of signal fundamental wave
Position.
The output module includes local terminal output module and remote terminal output module；Local terminal output module with
Serial port form exports the multiple groups collection result of merging module to local mutual inductor status assessment terminal, on local terminal,
By real-time display, fundamental wave, the harmonic wave, degree of unbalancedness information of the current collected three-phase mutual inductor of storage, long-time span is realized
History run feature is locally stored, and assesses the kinematic error and operation risk in fortune mutual inductor in real time；Remote terminal output
Module is used to export the local assessment result in fortune mutual inductor to terminal unit, and data transmission is wirelessly communicated based on GPRS/LTE,
Transmission system both ends use electric power dedicated data transmission unit, and Support center is to the system group network mode of multiple spot, in network structure
Upper realization virtual data private network realizes that measurement centre's background system is stably connected with multiple substations.
Description below is done to the English alphabet occurred in above-mentioned text: FPGA (Field-Programmable Gate
Array), i.e. field programmable gate array；DSP (Digital Signal Processing) i.e. Digital Signal Processing；PT is electricity
Press mutual inductor；CT is current transformer；FFT (Fast Fourier Transformation) is discrete fourier transform (DFT)
Fast algorithm, as fast Fourier transform.
Compared with prior art, excellent effect of the invention is: being based on Beidou/GPS dual-mode synchronization signal, supports system
Interior synchronization and inter-system synchronization, theoretically can be to all mutual inductors in any electric power networks by extension acquisition system number
Operation data is acquired.Acquisition module realizes voltage and current high-precision by high-precision A/D+FPGA+ High Performance DSP framework
Acquisition.Realize that voltage or current characteristic amount extract based on three interpolated FFT algorithm of high-order window function, it being capable of accurate, extract real-time letter
Number fundamental wave, triple-frequency harmonics, quintuple harmonics frequency, amplitude, phase and zero sequence and negative phase-sequence degree of unbalancedness.Local terminal is included originally
Ground database can establish the history run property data base of mutual inductor group long-time span, realize the fortune in fortune mutual inductor
The real-time assessment of row error and operation risk.Data remote transmission is wirelessly communicated based on GPRS/LTE, and Transmission system uses electric power
Dedicated DTU has anti-electromagnetic interference capability strong, the good characteristics such as thermal adaptability height.
Detailed description of the invention
Fig. 1 is the real-time acquisition system structural schematic diagram of high-voltage mutual inductor group operating status of the present invention；
Fig. 2 is voltage/current acquisition module structural schematic diagram of the present invention；
Fig. 3 is local data base terminal implementation process schematic diagram of the present invention.
Specific embodiment
Further details of introduction is carried out to the present invention with reference to the accompanying drawing, with reference to shown in attached drawing, the invention discloses one
Kind of the real-time acquisition system of high-voltage mutual inductor group operating status, it is characterised in that including synchronization module, acquisition module, merging module,
Output module；Synchronization module includes Beidou/GPS receiver module and synchronously control nucleus module；The acquisition module is divided into voltage
Acquisition module and current acquisition module, the merging module have the serial ports receiving module in 7 channels and merge control core module,
The output module includes local terminal output module and remote terminal output module.
Shown in referring to Fig.1, the overall plan of above-mentioned real-time acquisition system are as follows: the synchronization module receives Beidou/GPS signal
Multichannel for acquisition module provides PPS pulse and provides time signal for data combiners block, while supporting multiple acquisitions
Real-time synchronization acquisition between system；The acquisition module is based on A/D+FPGA+DSP framework and realizes to the secondary output of multiple groups mutual inductor
The A/D of electric simulation signal is sampled and Characteristic Extraction；The merging module merges the Characteristic Extraction result of multichannel, and
Absolute time is extracted from Beidou/GPS time signal, adds markers for the multiple groups characteristic quantity result after merging；The output mould
Block is used to as a result can be used for commenting in real time to mutual inductor group kinematic error to local terminal and remote terminal transmission collection result
Estimate.
There is the Beidou/GPS receiver module satellite signal receiving antenna and satellite-signal processing module, satellite-signal to connect
It receives antenna and supports Beidou/GPS signal dual mode reception；Satellite-signal processing module exports Beidou/GPS signal processing PPS seconds
Pulse signal and rs 232 serial interface signal containing absolute time information.The synchronously control nucleus module is realized based on FPGA, receives PPS
Second pulse signal, and 6 road PPS second pulse signal of synchronism output is used for acquisition module is synchronous.Above-mentioned synchronization module utilizes radio frequency
Chip receives Beidou/GPS information, exports PPS signal by I/O port, exports absolute time information by serial ports.This PPS signal quilt
It is further transmitted to control core, control core is based on 50MHz high-precision and high-stability clock and carries out the forwarding of 6 tunnel parallel synchronous,
Forward delay and inter-channel synchronization error are less than 20ns.
Referring to shown in Fig. 2, voltage acquisition module and current acquisition module can all be realized to 6 channel voltages or current signal
The real-time synchronization acquisition to 6 groups of 36 channel three-phase mutual inductor operating status, the voltage acquisition module energy are realized in acquisition and processing
Realize that voltage transformation, voltage acquisition and voltage characteristic amount are extracted；Voltage transformation passes through high precision small PT for the volume of secondary output
Constant voltage is converted into the small voltage less than voltage rating, and the specified progress of disease of high precision small PT is 57.7V (voltage rating): 4V is (small
Voltage), there is 0.01 class precision, behind connect voltage sample resistance and signal condition part, the voltage signal transformation is using light
Quantitative design, overall load are less than 0.25VA.The PPS pulse per second (PPS) that voltage acquisition module is exported using synchronization module as trigger collection,
Realize that the analog-to-digital conversion of voltage signal, voltage characteristic amount are extracted through the realization pair of high-precision Floating-point DSP with the frequency acquisition of setting
The extraction of voltage sample value sequence characteristic value can extract the fundamental wave, triple-frequency harmonics, quintuple harmonics frequency, amplitude, phase of signal
Position, and according to three-phase result calculate voltage zero sequence and negative phase-sequence degree of unbalancedness, finally by specific result with particular frame format with
Serial port form is output to merging module, and the current acquisition module realizes that current transformation, current acquisition and current characteristic amount are extracted,
The rated current of secondary output is converted into the low current less than rated current by high precision small CT by current transformation, wherein high
Specified 5A/1A electric current can be converted into 5mA low current by specified 0.01 class precision of the progress of disease of precision Small-sized C T, behind connect electric current and adopt
Sample resistance and signal condition part, the current signal transformation use light-weight design, and overall load is less than 0.25VA.Electric current is adopted
The first sampling resistor with high precision of collection is acquisition to current signal progress analog sampling, then with the PPS pulse per second (PPS) of synchronization module output
Triggering realizes that the analog-to-digital conversion of current signal, current characteristic amount are extracted real by high-precision Floating-point DSP with the frequency acquisition of setting
Now to the extraction of current sampling data sequence features, can extract the fundamental wave of signal, triple-frequency harmonics, quintuple harmonics frequency, amplitude,
Phase, and according to the zero sequence and negative phase-sequence degree of unbalancedness of three-phase result calculating current, finally by specific result with particular frame format
Merging module is output to serial port form.
In above-mentioned voltage acquisition and current acquisition stage, 24 A/D acquisition chips are controlled by FPGA and are carried out.FPGA according to
High precision high stability degree reference clock reads PPS signal, rises acquisition control of the Time-delayed trigger to A/D chip, A/ in PPS signal
D chip samples 6 road signals with the sample frequency of 10k/s, and sampled result is passed back to FPGA in real time, FPGA with 1 time/
The frequency of s exports sampled result by the channel SPI.In entire sampling process, the sample-synchronous of 6 road signals is carried out.
Above-mentioned high-precision Floating-point DSP is to receive the sample values report of FPGA transmission by SPI communication and parse, then
DSP calculates fundamental wave, the harmonic frequency, amplitude, phase that every phase signals are calculated by Interpolating Window FFT Algorithm, to three-phase voltage/electricity
The fundamental wave of stream is handled, and residual voltage, positive sequence voltage, negative sequence voltage can be sought, so as to residual voltage degree of unbalancedness and
Negative sequence voltage degree of unbalancedness；Interpolating Window FFT Algorithm is implemented as follows: carrying out 1024: 43 ranks to time domain discrete sampling number first
Treated data are carried out base 2FFT operation by Nuttall window adding window truncation, can be with after modulus and phase angle process
The amplitude spectrum and phase spectrum of signal discrete are obtained, the left and right two of the maximum spectral line and maximum spectral line that then find amplitude spectrum is composed
Line acquires the maximum of points of signal spectrum finally by three spectral line interpolations, can acquire the frequency, amplitude and phase of signal fundamental wave
Position.That is, above-mentioned specific result refers to the maximum spectral line of amplitude spectrum and two spectral line of left and right of maximum spectral line, most
The maximum of points for acquiring signal spectrum by three spectral line interpolations afterwards can acquire the frequency, amplitude and phase of signal fundamental wave；It is specific
Frame format refers to the received frame format of merging module energy, and in this not go into detail.
The serial ports connection module in 7 channel 6 channel (CH1-CH6) therein is used to receive the acquisition knot of acquisition module output
Fruit, in addition 1 channel (CH7) is used to receive Beidou/GPS receiver module output time service time.The acquisition of control core synchronization process
As a result with time service time signal.By the collection result in decoding algorithm extract real-time custom protocol data frame, and 6 will be extracted
Group data result is merged into a data frame, and current absolute time is finally extracted from time service time signal, is added for collection result
Add accurate markers.
As shown in figure 3, the local data base terminal is realized using Java+MySQL mode, data transmission system uploads number
According to serial ports RS-232 communication protocol is met, the local data base of foundation is stored with special in the history run of fortune mutual inductor in substation
Sign amount data.Data transmission system uploads data fit RS-232 communication protocol, real using the receiving module of written in Java data
The reception of existing serial data utilizes written in Java data for the transmission instability problem that reply data transmission system is likely to occur
Identification module identifies check bit, after identification, classifies according to the type of characteristic quantity to data, is stored in deposit
In device, MySQL is then called, the data kept in register are transferred on memory, database volume meets 5 year calendars of storage
History operation characteristic amount data function stores frequency, initial phase, virtual value, fundametal compoment, three in fortune mutual inductor in database
Order harmonic components, quintuple harmonics component, voltage unbalance factor characteristic quantity；The local data base terminal built-in state estimation module
With Risk-warning module, advanced treating can be carried out to transmission data, assess kinematic error and operation risk in fortune mutual inductor.
The remote transmission is wirelessly communicated based on GPRS/LTE, and Transmission system both ends use the dedicated DTU of electric power, can be by RS232 serial ports number
It is wirelessly transferred according to TCP data is converted to, traffic rate is adjustable within the scope of 9600~115200bps；The remote transmission
System Support center realizes virtual data private network to the system group network mode of multiple spot in network structure, realizes measurement centre
Background system is stably connected with multiple substations.
Although above-mentioned be described and verify to a specific embodiment of the invention and validity in conjunction with attached drawing, not
Limiting the scope of the invention, those skilled in the art should understand that, based on the technical solutions of the present invention, this
Field technical staff does not need to make the creative labor the various modifications or changes that can be made still in protection scope of the present invention
Within.
Claims (10)
1. a kind of real-time acquisition system of high-voltage mutual inductor group operating status, it is characterised in that including synchronization module, acquisition module, conjunction
And module, output module；Synchronization module includes Beidou/GPS receiver module and synchronously control nucleus module；
The synchronization module reception Beidou/GPS signal provides PPS pulse for the multichannel of acquisition module and is that data merge mould
Block provides time signal, while the real-time synchronization between multiple acquisition systems being supported to acquire；
The acquisition module realizes the A/D of output electric simulation signal secondary to multiple groups mutual inductor based on A/D+FPGA+DSP framework
Sampling and Characteristic Extraction；
The merging module merges the Characteristic Extraction result of multichannel, and extracts absolute time from Beidou/GPS time signal
Between, markers is added for the multiple groups characteristic quantity result after merging；
The output module is used to as a result can be used for transporting mutual inductor group to local terminal and remote terminal transmission collection result
The real-time assessment of row error.
2. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 1, which is characterized in that the north
Bucket/GPS receiver module has satellite signal receiving antenna and satellite-signal processing module, and satellite signal receiving antenna supports north
Bucket/GPS signal dual mode reception；Beidou/GPS signal processing is exported PPS second pulse signal and contained by satellite-signal processing module
There is the rs 232 serial interface signal of absolute time information.
3. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 1, which is characterized in that the synchronization
Control core module is realized based on FPGA, receives PPS second pulse signal, and 6 road PPS second pulse signal of synchronism output is for acquiring mould
Block is synchronous to be used.
4. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 1, which is characterized in that the acquisition
Module is divided into voltage acquisition module and current acquisition module, and voltage acquisition module and current acquisition module can all be realized to 6 channels
The acquisition and processing of voltage or current signal are realized and are acquired to the real-time synchronization of 6 groups of 36 channel three-phase mutual inductor operating status.
5. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 4, which is characterized in that the voltage
Acquisition module is able to achieve voltage transformation, voltage acquisition and voltage characteristic amount and extracts；Voltage transformation passes through high precision small PT for two
The voltage rating of secondary output is converted into the small voltage less than voltage rating, the PPS second that voltage acquisition module is exported with synchronization module
Pulse is trigger collection, realizes that the analog-to-digital conversion of voltage signal, voltage characteristic amount are extracted by high-precision with the frequency acquisition of setting
Spend Floating-point DSP and realize extraction to voltage sample value sequence characteristic value, can extract the fundamental wave of signal, triple-frequency harmonics, five times it is humorous
Wave frequency rate, amplitude, phase, and according to the zero sequence and negative phase-sequence degree of unbalancedness of three-phase result calculating voltage, finally by specific result
Merging module is output to serial port form with particular frame format.
6. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 4, which is characterized in that the electric current
Acquisition module realizes that current transformation, current acquisition and current characteristic amount are extracted, and current transformation will be secondary by high precision small CT
The rated current of output is converted into the low current less than rated current, and the first sampling resistor with high precision of current acquisition is to current signal
Analog sampling is carried out, then using the PPS pulse per second (PPS) of synchronization module output as trigger collection, electric current letter is realized with the frequency acquisition of setting
Number analog-to-digital conversion, current characteristic amount, which is extracted, realizes extraction to current sampling data sequence features by high-precision Floating-point DSP,
The fundamental wave, triple-frequency harmonics, quintuple harmonics frequency, amplitude, phase of signal can be extracted, and according to the zero of three-phase result calculating current
Specific result is finally output to merging module with particular frame format with serial port form by sequence and negative phase-sequence degree of unbalancedness.
7. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 1, which is characterized in that the merging
Module has the serial ports receiving module in 7 channels and merges control core module.
8. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 7, which is characterized in that described 7 is logical
The serial ports connection module in road receives collection result and the Beidou/GPS receiver module output time service time of acquisition module output；It is described
Merge control core synchronization process collection result and time service time signal；Multiple groups collection result data are merged into a data
Frame, and current absolute time is extracted from time service time signal, accurate markers is added for collection result.
9. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 5 or 6, which is characterized in that described
High-precision Floating-point DSP is to receive the sample values report of FPGA transmission by SPI communication and parse, and then DSP is calculated by adding
Window interpolation FFT algorithm calculates the fundamental wave of every phase signals, harmonic frequency, amplitude, phase, carries out to three-phase voltage/electric current fundamental wave
Processing, can seek residual voltage, positive sequence voltage, negative sequence voltage, uneven so as to obtain residual voltage degree of unbalancedness and negative sequence voltage
Weighing apparatus degree；Interpolating Window FFT Algorithm is implemented as follows:
1024: 43 rank Nuttall window adding window truncations are carried out to time domain discrete sampling number first, it will treated data
Base 2FFT operation is carried out then to look in the amplitude spectrum and phase spectrum of the available signal discrete after modulus and phase angle process
To the maximum spectral line of amplitude spectrum and two spectral line of left and right of maximum spectral line, signal spectrum is acquired finally by three spectral line interpolations
Maximum of points can acquire the frequency, amplitude and phase of signal fundamental wave.
10. the real-time acquisition system of high-voltage mutual inductor group operating status according to claim 1, which is characterized in that described defeated
Module includes local terminal output module and remote terminal output module out；
Local terminal output module is exported the multiple groups collection result of merging module to local mutual inductor state with serial port form
Terminal is assessed, on local terminal, by real-time display, fundamental wave, the harmonic wave, degree of unbalancedness of the current collected three-phase mutual inductor of storage
Information realizes that the history run feature of long-time span is locally stored, and in real time assess fortune mutual inductor kinematic error and
Operation risk；
Remote terminal output module is used to export the local assessment result in fortune mutual inductor to terminal unit, and data transmission is based on
GPRS/LTE wireless communication, Transmission system both ends use electric power dedicated data transmission unit, system group of the Support center to multiple spot
Net mode realizes virtual data private network in network structure, realizes that measurement centre's background system and multiple substations are stablized and connects
It connects.
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| CN201811362008.7A CN109116289B (en) | 2018-11-15 | 2018-11-15 | Real-time acquisition system for running state of high-voltage transformer group |
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| CN201811362008.7A CN109116289B (en) | 2018-11-15 | 2018-11-15 | Real-time acquisition system for running state of high-voltage transformer group |
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| CN110740227A (en) * | 2019-10-25 | 2020-01-31 | 武汉大学 | Camera time synchronization device and method based on GNSS time service and image display information coding mode |
| CN110739969A (en) * | 2019-10-18 | 2020-01-31 | 唐智科技湖南发展有限公司 | signal synchronous acquisition system |
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Effective date of registration: 20211222 Address after: No. 150, Jinger Road, Daguanyuan, Shizhong District, Jinan City, Shandong Province Patentee after: Shandong Electric Power Marketing Center Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: HUAZHONG University OF SCIENCE AND TECHNOLOGY Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Patentee before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: HUAZHONG University OF SCIENCE AND TECHNOLOGY |