CN109581050A - It is distributed the full frequency-domain recording system of centralization - Google Patents
It is distributed the full frequency-domain recording system of centralization Download PDFInfo
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- CN109581050A CN109581050A CN201811250153.6A CN201811250153A CN109581050A CN 109581050 A CN109581050 A CN 109581050A CN 201811250153 A CN201811250153 A CN 201811250153A CN 109581050 A CN109581050 A CN 109581050A
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- signal detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Abstract
The present invention relates to power domains, more particularly to a kind of full frequency-domain recording system of distribution centralization, it include: three signal detection modules, each signal detection module is connected to the output end of A phase or B phase or C phase line mutual inductor nearby respectively, it is mutually communicated between three signal detection modules, synchronous to trigger other two signal detection modules when one of signal detection module detects trigger signal, three signal detection modules carry out high-frequency data acquisition simultaneously；Main website can support the storage and analysis of full frequency-domain recorder data.Following effect may be implemented in the present invention: mutually communicating between three signal detection modules, when one of signal detection module detects trigger signal, synchronous to trigger other two signal detection modules, three signal detection modules carry out high frequency recording simultaneously, reduce the probability of fault waveform leakage record；Main website carries out adaptive record to each phase current, voltage data, can support the storage and analysis of full frequency-domain recorder data.
Description
Technical field
The present invention relates to power domain more particularly to a kind of full frequency-domain recording systems of distribution centralization.
Background technique
The a large amount of power electronic equipments of conventional electric power system access, systematic electricity electronization feature is increasingly prominent, draws to power grid
Enter the transient interference of the different frequencies such as sub-synchronous oscillation, higher hamonic wave, so that stable form is more complicated after the system failure, shadow
It rings range substantially to expand, operation risk is continuously increased.Fault oscillograph networking realizes fault recorder data teletransmission to tune at different levels
Main website is spent, provides the valuable in-situ data of accident analysis and troubleshooting for scheduling person on duty and relay protection professional,
Improve the quick-reaction capability of traffic department's processing power system accident.
Existing oscillograph includes: signal detection module, monitoring modular and main website, and detection module is respectively and in power grid
A phase, B phase, C phase connection to obtain its voltage, current signal respectively obtains voltage, current waveform；Monitoring modular and signal
Detection module connection, caching and forwarding for fault waveform；Main website is used for the storage and analysis of fault waveform.
Full frequency-domain recording system for data caching and analytical equipment it is soft or hard more demanding, need the reality according to system
When operating condition, it is adaptive to realize 10kHz whole process low speed recording and 10MHz transient state high speed transient recording, and to recorder data into
The effective analysis of row, storage and processing.
Summary of the invention
To solve the above problems, the present invention proposes a kind of full frequency-domain recording system of distribution centralization.
A kind of full frequency-domain recording system of distribution centralization, comprising: three signal detection modules are examined with three signals respectively
Survey the module monitoring modular to communicate and the main website to communicate with monitoring modular, wherein each signal detection module is respectively
It is closely connected to the output end of A phase or B phase or C phase line, is mutually communicated between three signal detection modules, when one of signal
It is synchronous to trigger other two signal detection modules when detection module detects trigger signal, three signal detection modules simultaneously into
The acquisition of row high-frequency data.
Preferably, the signal detection module includes two detection units and connect respectively with one of detection unit
Voltage transformer, current transformer, the voltage transformer, current transformer are connected to A phase or B phase or C phase line
Output end, the detection unit for data acquisition and analysis processing.
Preferably, the detection unit includes partial pressure FM circuit, low frequency signal conditioning circuit, high-frequency signal conditioning electricity
Road, low speed A/D conversion circuit, high-speed a/d conversion circuit, fpga chip, CPU processor and telecommunication circuit；The partial pressure is adjusted
Frequency circuit connects voltage transformer or current transformer, for being depressured to input signal, frequency modulation；The low frequency signal conditioning
Circuit connection divides FM circuit, for low-pass filtering and is lifted level to meet the input range model of low speed A/D conversion circuit
It encloses；High-frequency signal conditioning circuit connection partial pressure FM circuit, for switching to differential signal for input signal is single-ended；It is described low
Fast A/D conversion circuit connects low frequency signal conditioning circuit, carries out A/D conversion for the low speed sampled signal after improving, and lead to
It crosses SPI serial line interface and is output to FPAG chip；The high-speed a/d conversion circuit connects high-frequency signal conditioning circuit, for that will adjust
High-speed sampling signal after reason carries out A/D conversion, and is output to FPAG chip by parallel interface；The fpga chip connection is low
Fast A/D conversion circuit, high-speed a/d conversion circuit, the processing for sampled signal are analyzed to obtain waveform；The CPU processor connects
Fpga chip is connect, for parameter storage and interface setting；The telecommunication circuit connects fpga chip, CPU processor, for counting
According to transmission.
Preferably, the monitoring modular includes fibre distribution frame, optical fiber switch, data concentrator, power port interchanger；Institute
It states optical fiber switch to connect by fibre distribution frame with signal detection module, for carrying out data exchange with signal detection module；
Described data concentrator one end connects optical fiber switch, and the other end connects main website by power port interchanger, for exchanging optical fiber
The data of machine transmission concentrate and are transferred to main website by power port interchanger.
Preferably, the monitoring modular further includes clock expansion module, and the main website includes clock module, and the clock expands
Exhibition module one end is connect with the clock module in main website, and the other end is connect by fibre distribution frame with signal detection module, is used for
The synchronization of the time of main website, monitoring modular, signal detection module.
Preferably, the monitoring modular further includes double-power supply switching device, and described double-power supply switching device one end passes through light
Fine interchanger is connect with data concentrator, power port interchanger, clock expansion module respectively, the other end respectively with main power source module,
Standby power supply module connection, has a power failure for some reason for main power source module and automatically switches to standby power supply module.
Preferably, the main website includes data memory module and analysis module, and the data memory module is used for Hui Zhaohuan
The transient state recorder data deposited, and stored for a long time using big capacity hard disk；The analysis module is calculated using transient state time-frequency mathematics
Method is analyzed and is shown to the transient state time-frequency characteristic of transient state recorder data
By using the present invention, following effect may be implemented: each signal detection module is connected to A phase, B nearby respectively
The output end of phase, C phase line mutually communicates between three signal detection modules, when one of signal detection module detects
Synchronous to trigger other two signal detection modules when trigger signal, three signal detection modules carry out high frequency recording simultaneously, reduce
The probability of fault waveform leakage record；Main website carries out adaptive record to each phase current, voltage data, full frequency-domain can be supported to record
The storage and analysis of wave number evidence.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the integral module connection figure of the embodiment of the present invention；
Fig. 2 is the module connection figure of signal detection module in the embodiment of the present invention；
Fig. 3 is the module connection figure of detection unit in the embodiment of the present invention；
Fig. 4 is the circuit diagram that FM circuit is divided in the embodiment of the present invention；
Fig. 5 is the module connection figure of monitoring modular in the embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, technical scheme of the present invention will be further described, but the present invention is not limited to these realities
Apply example.
As shown in Figure 1, it is a kind of distribution centralization full frequency-domain recording system, comprising: three signal detection modules, respectively with
The monitoring modular that three signal detection modules communicate and the main website to communicate with monitoring modular, wherein each signal detection
Module is connected to the output end of A phase, B phase, C phase route nearby respectively, mutually communicates between three signal detection modules, when wherein
It is synchronous to trigger other two signal detection modules, three signal detection moulds when one signal detection module detects trigger signal
Block carries out high-frequency data acquisition simultaneously.
In conjunction with attached drawing 2, specifically, signal detection module includes two detection units and detects list with one of respectively
Voltage transformer, the current transformer of member connection, voltage transformer, current transformer are connected to A phase or B phase or C phase line
The output end on road, acquisition and analysis processing of the detection unit for data.Voltage transformer, current transformer are all made of electromagnetism sense
Answer principle, current transformer is to be transformed into high current low current (5A or less), voltage transformer be high voltage is transformed into it is low
Voltage (100V or less), latter two right detection unit carries out the acquisition of data to low current and low-voltage respectively, and analyzes processing
Obtain the output waveform of current signal, voltage signal.
In conjunction with attached drawing 3, wherein detection unit includes partial pressure FM circuit, low frequency signal conditioning circuit, high-frequency signal conditioning
Circuit, low speed A/D conversion circuit, high-speed a/d conversion circuit, fpga chip, CPU processor, telecommunication circuit, parameter storage and
Interface, static state RAM and DDR3.Wherein, telecommunication circuit include Ethernet fiber optic communication circuit, optical fiber recording trigger circuit and
Optical fiber B code communication circuit.
In conjunction with attached drawing 4, FM circuit connection voltage transformer or current transformer are divided, for dropping to input signal
Pressure, frequency modulation.Dividing FM circuit includes resistance R3, R4, R5, capacitor C1, C7, C8, R3, R4, R5 form 50:1 voltage attenuation net
Network；C1, C6, C7, C8 form frequency response and adjust circuit.
Low frequency signal conditioning circuit connection partial pressure FM circuit, for low-pass filtering and lifting level is to meet low speed A/D
The input range range of conversion circuit.Low frequency signal conditioning circuit includes that sequentially connected level-one emitter follower, 4 rank Barts are fertile
This low-pass filter and adder.Partial pressure FM circuit output first passes around level-one emitter follower and changes input and output resistance
It is anti-；Then pass through 4 rank Butterworth LPFs, 1kHz@- 3db；Voltage is set to meet A/ finally by adder lifting level
D input range range.
High-frequency signal conditioning circuit connection partial pressure FM circuit, for switching to differential signal for input signal is single-ended.High frequency
Signal conditioning circuit includes level-one high speed emitter follower, difference amplifier.Partial pressure FM circuit output first passes around the high rapid fire of level-one
Change input and output impedance with device；Then switch to differential signal by the way that difference amplifier is single-ended.
Low speed A/D conversion circuit connects low frequency signal conditioning circuit, carries out A/D for the low speed sampled signal after improving
Conversion, and FPAG chip is output to by SPI serial line interface.Low speed A/D conversion circuit includes low speed A/D acquisition chip, low speed
A/D acquisition chip uses the ADS8329 (16-Bit, 1MSPS, ADS, Serial SPI Interface) of TI company.Low frequency is adopted
The voltage data for collecting the conversion output of A/D chip, is buffered to internal stationary RAM by fpga chip.2 pieces of regions of dual port RAM point, the
1 piece when writing full, then the 2nd piece is write, forming 1-2 circulation storage ensures the integrality of recorder data；CPU processor is write full by judgement
Label, reads the static RAM data of corresponding region.Then analysis of data collected and Wave data is issued by Ethernet in real time.
High-speed a/d conversion circuit connects high-frequency signal conditioning circuit, carries out A/D for the high-speed sampling signal after improving
Conversion, and FPAG chip is output to by parallel interface.High-speed a/d conversion circuit includes high frequency acquisition A/D chip, high frequency acquisition
The voltage data of A/D chip conversion output, is buffered to internal stationary RAM by fpga chip, then read by internal logic quiet
State RAM data is saved in the real-time waveform storage region of DDR3, when there is recording trigger signal, extracts corresponding real-time waveform number
According to, triggering moment, triggering phase (A/B/C phase), triggering mode etc. to DDR3 recording storage region；CPU processor passes through FPGA core
Static RAM access DDR3 in piece obtains recorder data.
FPGA (Field-Programmable Gate Array) chip connects low speed A/D conversion circuit, high-speed a/d turns
Circuit is changed, the processing for sampled signal is analyzed to obtain waveform.Fpga chip is in programming devices such as PAL, GAL, CPLD
On the basis of the product that further develops.The logical block inside FPGA is connected as desired by editable connection, just
It can complete required logic function.
CPU processor connects fpga chip, for parameter storage and interface setting, using ARM7 series STM32F103
Processor is as CPU processing core.
Telecommunication circuit connects fpga chip, CPU processor, the transmission for data.Signal detection module and external data
Communication, which transmits and receives, is all made of optical fiber solutions, and fiber bandwidth is big, decaying is small, even in the very strong environment of electromagnetic wave
Without interruption.Too net fiber optic communication circuit uses TCP/IP optical fiber network interface, the transmission for collected data；The touching of optical fiber recording
Power Generation Road is used for the transmission of trigger signal；Optical fiber B code communication circuit is synchronous for clock synchronization.
In conjunction with attached drawing 5, monitoring modular include fibre distribution frame, optical fiber switch, data concentrator, power port interchanger, when
Clock expansion module, double-power supply switching device.
Optical fiber switch is connect by fibre distribution frame with signal detection module, for carrying out data with signal detection module
Exchange；Data concentrator one end connects optical fiber switch, and the other end connects main website by power port interchanger, for being responsible for every phase inspection
Survey the functions such as parameter setting, data acquisition, the recorded wave file reproduction of module.Long-range main website data transmit work also by data set
Device is responsible for completion；Clock expansion module one end is connect with the clock module in main website, and the other end passes through fibre distribution frame and signal
Detection module connection, the synchronization of the time for main website, monitoring modular, signal detection module；Double-power supply switching device one end is logical
Optical fiber switch is crossed to connect with data concentrator, power port interchanger, clock expansion module respectively, the other end respectively with main power source mould
Block, standby power supply module connection, have a power failure for some reason for main power source module and automatically switch to standby power supply module；Fibre distribution frame,
The 12 core optical cable of multimode accessed from each signal detection module is allocated, 5 core therein is respectively used to: fiber optic Ethernet hair
It send, fiber optic Ethernet receives, synchronous triggering is sent, synchronous triggering receives, optical fiber B code.
Main website includes data memory module and analysis module, and the data memory module is used to back call together the transient state recording of caching
Data, and stored for a long time using big capacity hard disk；The analysis module is using transient state time-frequency mathematical algorithm to transient state recording
The transient state time-frequency characteristic of data is analyzed and is shown.Wherein, transient state time-frequency mathematical algorithm is the prior art, in the present embodiment
Expansion explanation is not carried out to it.
In the present embodiment, trigger signal includes: manual triggering, overvoltage triggering, the triggering of the voltage effective value upper limit, voltage
The triggering of virtual value lower limit, the Voltage Transient Disturbances triggering, the triggering of the current effective value upper limit, overcurrent triggering, current temporary state disturbance touching
The triggering modes such as hair.Under normal circumstances, signal detection module is acquired data using low frequency signal, when collected signal
When meeting above-mentioned any triggering mode, synchronous to trigger other two signal detection modules, three signal detection modules are simultaneously
High-frequency data acquisition is carried out, electric current and voltage waveform are obtained.Low frequency whole process recorder data that three signal detection modules obtain and
High frequency triggering recorder data is sent to data concentrator, and data concentrator transmits data to main website, main website at regular intervals
Waveform is analyzed to obtain failure cause.Such data acquisition modes reduce the probability of fault waveform leakage record, while
It is more advantageous to and failure is analyzed according to waveform.
Those skilled in the art can make various modifications to described specific embodiment
Or supplement or be substituted in a similar manner, however, it does not deviate from the spirit of the invention or surmounts the appended claims determines
The range of justice.
Claims (7)
1. be distributed centralization full frequency-domain recording system characterized by comprising three signal detection modules, respectively with three
The monitoring modular that signal detection module communicates and the main website to communicate with monitoring modular, wherein each signal detection module
It is connected to the output end of A phase or B phase or C phase line nearby respectively, is mutually communicated between three signal detection modules, when wherein one
It is synchronous to trigger other two signal detection modules, three signal detection modules when a signal detection module detects trigger signal
High-frequency data acquisition is carried out simultaneously.
2. the full frequency-domain recording system of distribution centralization according to claim 1, it is characterised in that: the signal detection mould
Block includes two detection units and the voltage transformer, the current transformer that connect respectively with one of detection unit, described
Voltage transformer, current transformer are connected to the output end of A phase or B phase or C phase line, and the detection unit is used for data
Acquisition and analysis processing.
3. the full frequency-domain recording system of distribution centralization according to claim 2, it is characterised in that: the detection unit packet
Include partial pressure FM circuit, low frequency signal conditioning circuit, high-frequency signal conditioning circuit, low speed A/D conversion circuit, high-speed a/d conversion
Circuit, fpga chip, CPU processor and telecommunication circuit；
Partial pressure FM circuit connection voltage transformer or current transformer, for being depressured to input signal, frequency modulation；
The low frequency signal conditioning circuit connection partial pressure FM circuit, for low-pass filtering and lifting level is to meet low speed A/D
The input range range of conversion circuit；
High-frequency signal conditioning circuit connection partial pressure FM circuit, for switching to differential signal for input signal is single-ended；
The low speed A/D conversion circuit connects low frequency signal conditioning circuit, carries out A/D for the low speed sampled signal after improving
Conversion, and FPAG chip is output to by SPI serial line interface；
The high-speed a/d conversion circuit connects high-frequency signal conditioning circuit, carries out A/D for the high-speed sampling signal after improving
Conversion, and FPAG chip is output to by parallel interface；
The fpga chip connects low speed A/D conversion circuit, high-speed a/d conversion circuit, and the processing for sampled signal is analyzed
To waveform；
The CPU processor connects fpga chip, for parameter storage and interface setting；
The telecommunication circuit connects fpga chip, CPU processor, the transmission for data.
4. the full frequency-domain recording system of distribution centralization according to claim 1, it is characterised in that: the monitoring modular packet
Include fibre distribution frame, optical fiber switch, data concentrator, power port interchanger；
The optical fiber switch is connect by fibre distribution frame with signal detection module, for carrying out data with signal detection module
Exchange；
Described data concentrator one end connects optical fiber switch, and the other end connects main website by power port interchanger, for optical fiber
The data of interchanger transmission concentrate and are transferred to main website by power port interchanger.
5. the full frequency-domain recording system of distribution centralization according to claim 4, it is characterised in that: the monitoring modular is also
Including clock expansion module, the main website includes clock module, the clock module in clock expansion module one end and main website
Connection, the other end connect by fibre distribution frame with signal detection module, for main website, monitoring modular, signal detection module
The synchronization of time.
6. the full frequency-domain recording system of distribution centralization according to claim 5, it is characterised in that: the monitoring modular is also
Including double-power supply switching device, described double-power supply switching device one end by optical fiber switch respectively with data concentrator, power port
Interchanger, the connection of clock expansion module, the other end are connect with main power source module, standby power supply module respectively, are used for main power source mould
Block has a power failure for some reason automatically switches to standby power supply module.
7. the full frequency-domain recording system of distribution centralization according to claim 1-6, it is characterised in that: the master
It stands including data memory module and analysis module, the data memory module is used to back call together the transient state recorder data of caching, and benefit
It is stored for a long time with big capacity hard disk；The analysis module is using transient state time-frequency mathematical algorithm to the transient state of transient state recorder data
Time-frequency characteristic is analyzed and is shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811250153.6A CN109581050A (en) | 2018-10-25 | 2018-10-25 | It is distributed the full frequency-domain recording system of centralization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811250153.6A CN109581050A (en) | 2018-10-25 | 2018-10-25 | It is distributed the full frequency-domain recording system of centralization |
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| CN109581050A true CN109581050A (en) | 2019-04-05 |
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| CN201811250153.6A Pending CN109581050A (en) | 2018-10-25 | 2018-10-25 | It is distributed the full frequency-domain recording system of centralization |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334439A (en) * | 2008-07-08 | 2008-12-31 | 国电南瑞科技股份有限公司 | Electric network data integrated collection method and apparatus |
| CN106124843A (en) * | 2016-07-08 | 2016-11-16 | 国网上海市电力公司 | A kind of wide frequency band measurement system of AC network transient process |
| CN106353549A (en) * | 2016-08-15 | 2017-01-25 | 广州致远电子股份有限公司 | Adjustable circuit device and voltage measuring device |
| CN207689566U (en) * | 2017-12-26 | 2018-08-03 | 上海申贝科技发展有限公司 | A kind of broadband electromagnetic transient overvoltage sampling apparatus |
-
2018
- 2018-10-25 CN CN201811250153.6A patent/CN109581050A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334439A (en) * | 2008-07-08 | 2008-12-31 | 国电南瑞科技股份有限公司 | Electric network data integrated collection method and apparatus |
| CN106124843A (en) * | 2016-07-08 | 2016-11-16 | 国网上海市电力公司 | A kind of wide frequency band measurement system of AC network transient process |
| CN106353549A (en) * | 2016-08-15 | 2017-01-25 | 广州致远电子股份有限公司 | Adjustable circuit device and voltage measuring device |
| CN207689566U (en) * | 2017-12-26 | 2018-08-03 | 上海申贝科技发展有限公司 | A kind of broadband electromagnetic transient overvoltage sampling apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 胡列翔等: ""电网全频域暂态信息记录及分析系统"", 《浙江电力》 * |
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