CN110058080A - A kind of adaptive full frequency-domain recording system and method that can trigger transient high frequency acquisition - Google Patents
A kind of adaptive full frequency-domain recording system and method that can trigger transient high frequency acquisition Download PDFInfo
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- CN110058080A CN110058080A CN201811253001.1A CN201811253001A CN110058080A CN 110058080 A CN110058080 A CN 110058080A CN 201811253001 A CN201811253001 A CN 201811253001A CN 110058080 A CN110058080 A CN 110058080A
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- 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
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Abstract
The invention discloses a kind of adaptive full frequency-domain recording system and method that can trigger transient high frequency acquisition, are related to power domain.The present invention the following steps are included: acquire the full frequency-domain signal of output cord by low frequency signal acquisition module, output low frequency signal waveform in real time；When detecting trigger signal in collected full frequency-domain signal, signal acquisition is carried out to output cord by high-frequency signal acquisition module, exports high-frequency signal waveform.Following effect may be implemented in the present invention: passing through the whole acquisition in real time of low frequency, the recording mode of high frequency transient triggering collection, on the one hand the leakage record probability of fault-signal is reduced, on the other hand the pressure of transient signal high speed storing is slowed down, to realize the adaptive switching of failure wave-recording mode, support efficiently, accurately full frequency-domain recording；By the triggering method of a variety of principles, realize that the accurate recognition of various types of failures and quickly triggering carry out high-frequency signal acquisition when meeting one triggering mode of any of them.
Description
Technical field
The present invention relates to power domain more particularly to a kind of adaptive full frequency-domain recording systems that can trigger transient high frequency acquisition
System and its method.
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
The interference for having entered the different frequencies such as sub-synchronous oscillation, transient state harmonic wave, higher hamonic wave, so that stable form is more multiple after the system failure
Miscellaneous, coverage is substantially expanded, and operation risk is continuously increased.Fault oscillograph networking realizes fault recorder data teletransmission to each
Grade scheduling station provides the preciousness scene money of accident analysis and troubleshooting for scheduling person on duty and relay protection professional
Material improves the quick-reaction capability of traffic department's processing power system accident.
Existing Wave record method generallys use low frequency or high-frequency signal acquisition module and carries out signal to outlet line in real time
Acquisition, output waveform.It is acquired according to low frequency signal acquisition module, then since its sample frequency is lower, it is possible to not acquire
To high frequency fault transient signal；It is acquired according to high-frequency signal acquisition module, since the space of storage is limited, and cannot accomplish reality
When acquire.On the other hand, the producing method of the trigger signal of existing Wave record method is more single, is not applied for various failures
Scene.
Summary of the invention
To solve the above problems, the present invention proposes a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition
And its method.
It is a kind of can trigger transient high frequency acquisition adaptive full frequency-domain recording system include: three signal detection modules, point
The monitoring modular not communicated with three signal detection modules, wherein each signal detection module be connected to nearby respectively A phase or
In B phase or C phase line；
Each detection module includes low-frequency data acquisition submodule and high-frequency data acquisition submodule: low-frequency data acquires submodule
Block is used to carry out the whole acquisition in real time of low frequency signal to output cord, and the low-frequency data of output low frequency signal waveform acquires submodule
Block；High-frequency data acquisition submodule is used to work as detects the signal for meeting trigger condition in collected low frequency live signal
When, high speed full frequency-domain signal acquisition is carried out to output cord, exports full frequency-domain signal waveform；
It is mutually communicated between three signal detection modules, it is synchronous when one of signal detection module detects trigger signal
Other two signal detection modules are triggered, three signal detection modules carry out high-frequency data acquisition simultaneously；Each signal detection mould
Block is set in a cabinet, the chassis earth, and chassis shell body is equipped with heat release hole with heat loss through convection, and cabinet is equipped with one or more layers
Shielded layer；The monitoring modular is set to a monitoring cabinet.
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.
Preferably, the back side arranging shielding layer of the wiring board equipped with detection module, the edge of shielded layer distance line plate away from
From no less than 10mm, incuded with reducing with the electromagnetic signal of crust of the device.
Preferably, between each detection unit recording triggering fiber optic serial bus using multimode pigtail monitoring cabinet in into
The synchronous recording note for triggering other detection units when a certain detection unit detects triggering Wave data is realized in row annular connection
Record guarantees that data are effectively reliable, and the data communication optical fiber network interface of each detection unit is pooled to data exchange by multimode pigtail
Machine realizes the upload of detection unit recorder data.
It is a further object to provide a kind of full frequency-domain Wave record methods comprising following steps: to output cord
Carry out the whole acquisition in real time of low frequency signal, output low frequency signal waveform；Letter is triggered when detecting in collected live signal
Number when, then to output cord carry out high frequency full frequency-domain signal acquisition, export high-frequency signal waveform.
Preferably, the trigger signal includes: in collected live signal, if voltage effective value is greater than upper voltage limit
Threshold values is less than lower voltage limit threshold values, then generates trigger signal.
Preferably, if the trigger signal includes: that route is in power failure state, and in collected live signal,
Real-time voltage absolute value is greater than overpressure value in the continuous some time, then generates trigger signal；If route is in electriferous state, and
In collected live signal, real-time voltage absolute value is less than decompression value in the continuous some time, then generates trigger signal；If
Route is in electriferous state state, and in collected full frequency-domain signal, real-time voltage absolute value in the continuous some time
Greater than overpressure value, then trigger signal is generated.
Preferably, the trigger signal includes: in collected live signal, if transient voltage fluctuation Wave data is big
In transient disturbance increment, and the state retention time is more than or equal to transient disturbance time threshold, then generates trigger signal.
Preferably, the trigger signal includes: in collected live signal, if current effective value is greater than upper current limit
Threshold values is less than lower current limit threshold values, then generates trigger signal.
Preferably, the trigger signal includes: in collected live signal, if transient current disturbance waveform data are big
In transient disturbance increment, and the state retention time is more than or equal to transient disturbance time threshold, then generates trigger signal.
Preferably, the trigger signal includes: in collected live signal, if two sub-value of real-time current was greater than electricity
Threshold values is flowed, and the state retention time is more than or equal to overcurrent time threshold, then generates trigger signal.
Preferably, if the trigger signal includes: to receive the triggering control instruction of host computer, trigger signal is generated.
By using the present invention, following effect may be implemented:
One, each signal detection module is connected on A phase, B phase, C phase route nearby respectively, phase between three signal detection modules
Mutually communication, when one of signal detection module detects trigger signal, synchronous other two signal detection modules of triggering, three
A signal detection module carries out high frequency recording simultaneously, reduces the probability of fault waveform leakage record；Main website is to each phase current, voltage number
According to adaptive record is carried out, the storage and analysis of full frequency-domain recorder data can be supported.
Two, detection module and monitoring modular are provided separately, and detection module is set in shielded layer, and shielded layer can be the double-deck material
Material, can play good shielding action, shielding case configuration design is at cylinder D type structure, a side to high frequency and low-frequency disturbance
Face can reduce the capacity plate antenna effect between adjacent block, and can utmostly shield interference signal.
Three, by the whole acquisition in real time of low frequency, the recording mode of high frequency transient triggering collection, failure letter is on the one hand reduced
Number leakage record probability, on the other hand slow down the pressure of transient signal high speed storing, thus realize failure wave-recording mode from
Adapt to switching, support efficiently, accurately full frequency-domain recording；By the triggering method of a variety of principles, various types event is realized
The accurate recognition of barrier and quickly triggering, when failure meets one triggering mode of any of them, can carry out the up to height of 10MHz
The acquisition of frequency full frequency-domain.
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.
Fig. 6 is the flow diagram of 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, a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition, comprising: three signals
Detection module, the monitoring modular to communicate respectively with three signal detection modules, wherein each signal detection module difference is nearest
It is connected on A phase or B phase or C phase line, is mutually communicated between three signal detection modules, when one of signal detection module
Synchronous to trigger other two signal detection modules when detecting trigger signal, three signal detection modules carry out high frequency simultaneously
According to acquisition；Each signal detection module is set in a cabinet, the chassis earth, and chassis shell body is equipped with heat release hole to wandering
Heat, cabinet are equipped with one or more layers shielded layer；The monitoring modular is set to a monitoring cabinet.
By using the present invention, following effect may be implemented: each signal detection module is connected to A phase, B nearby respectively
It in phase, C phase line, is mutually communicated between three signal detection modules, when one of signal detection module detects triggering letter
Number when, synchronous to trigger other two signal detection modules, three signal detection modules carry out high frequency recording simultaneously, reduce failure
The probability of waveform leakage record；Main website carries out adaptive record to each phase current, voltage data, can support full frequency-domain recorder data
Storage and analysis.
Detection module and monitoring modular are provided separately, and detection module is set in shielded layer, and shielded layer can be double layer material, energy
Enough to play good shielding action to high frequency and low-frequency disturbance, on the one hand shielding case configuration design can at cylinder D type structure
Reduce the capacity plate antenna effect between adjacent block, and can utmostly shield interference signal.
To reduce signal interference, the back side arranging shielding layer of the wiring board equipped with detection module, shielded layer distance line plate
Edge Distance be no less than 10mm, incuded with reducing with the electromagnetic signal of crust of the device.
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.
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.
Recording triggering fiber optic serial bus between each detection unit is annular using carrying out in the monitoring cabinet of multimode pigtail
Connection is realized the synchronous recording record for triggering other detection units when a certain detection unit detects triggering Wave data, is guaranteed
Data are effectively reliable, and the data communication optical fiber network interface of each detection unit is pooled to data switching exchane by multimode pigtail, realize
The upload of detection unit recorder data.
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 of TI company, Serial SPI Interface).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 connection low speed A/D conversion circuit, high-speed a/d turn
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.
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.
In conjunction with attached drawing 6, a kind of full frequency-domain Wave record method, comprising the following steps:
Step 1 carries out low frequency signal full frequency-domain to output cord and acquires in real time, output low frequency signal waveform；
Step 2 then carries out high-frequency signal to output cord when detecting trigger signal in collected full frequency-domain signal
Acquisition exports high-frequency signal waveform.
In the present embodiment, while a low frequency signal acquisition module and a high-frequency signal acquisition module, low frequency being equipped with
Signal acquisition module and high-frequency signal acquisition module are both connected to output cord.Wherein, low frequency signal acquisition module uses 10kHz
Low-frequency sampling；High-frequency signal acquisition module uses 10MHz high frequency sampling.When low frequency acquires full frequency-domain signal in real time,
Collected full frequency-domain signal is stored and is detected in real time simultaneously, judges whether it reaches the requirement for generating trigger signal,
If reaching the requirement for generating trigger signal, high-frequency signal acquisition module carries out 10MHz high frequency sampling, and output waveform simultaneously stores.
Wherein, the data of low frequency signal acquisition continuously save 3 months, are more than to abandon old data；And 10MHz high speed voltage sample data,
At most save 10000 groups.
Specifically, above-mentioned trigger signal includes: the triggering of the voltage effective value upper limit, the triggering of voltage effective value lower limit, electrification touching
Hair, power loss triggering, overvoltage triggering, the Voltage Transient Disturbances triggering, the triggering of the current effective value upper limit, the touching of current effective value lower limit
Hair, overcurrent triggering, current temporary state disturbance triggering, triggering manually.Various triggering modes are described in detail below.
The triggering of the voltage effective value upper limit and the triggering of voltage effective value lower limit:
In collected live signal, if voltage effective value is greater than upper voltage limit threshold values, the triggering of the voltage effective value upper limit；If
Voltage effective value is less than lower voltage limit threshold values, then voltage effective value lower limit triggers.
Electrification triggering, power loss triggering and overvoltage triggering:
Set overvoltage factor k1Range be 1.01 ~ 1.99, default value 1.10；Set route power loss judgement factor k2Range
It is 0.01 ~ 0.99, default value 0.70；Set route electrification judge the range of voltage Un as 1.0 ~ 19.9V, default value 3.0V；If
Determine minimum reference crest voltage UomminRange be 1.0 ~ 19.9V, default value 2.0V；Uom is the reference peak electricity of input signal
Pressure, value monitoring calculation per second are primary；Ui is input live signal voltage, | Ui | it is its absolute value, real-time monitoring calculates.
If route is in power failure state, and continuous 2us real-time voltage absolute value | Ui | it is greater than overpressure value (k1* Uom), then
Electrification triggering；If route is in electriferous state, and continuous 20ms real-time voltage absolute value is less than decompression value (k2* Uom), then it loses
Electricity triggering；If route is in electriferous state, and continuous 2 us real-time voltage absolute value is greater than overpressure value (k1* Uom), then it is excessively electric
Pressure triggering.
The Voltage Transient Disturbances triggering:
Set transient disturbance increment uSRange be 1.0 ~ 19.9V；The range of transient disturbance time is 0.1 ~ 999.9us.When
Route is in electriferous state, calculates transient voltage fluctuation Wave data, wherein for the voltage data of a cycle of 10M sampling；
For the voltage data of a upper cycle for 10M sampling；For transient voltage fluctuation Wave data.If transient voltage fluctuation Wave data
Greater than setting transient disturbance increment uS, and the state retention time is more than or equal to the transient disturbance time, then the Voltage Transient Disturbances touch
Hair.
The triggering of the current effective value upper limit, the triggering of current effective value lower limit:
In collected live signal, if current effective value is greater than upper current limit threshold values, the triggering of the current effective value upper limit；If
Current effective value is less than lower current limit threshold values, then current effective value lower limit triggers.
Current temporary state disturbance triggering:
Set 1.0 ~ 19.9V of range of transient disturbance increment；0.1 ~ 999.9us of range of transient disturbance time.
It calculates, wherein the current data of a cycle for 10M sampling；For the electric current number of a upper cycle for 10M sampling
According to；For transient voltage fluctuation Wave data.If transient voltage fluctuation Wave data is greater than transient disturbance increment, and the state is kept
Time is more than or equal to the transient disturbance time, then current temporary state disturbance triggering.
Overcurrent triggering:
Set 1.0 ~ 99.9V of range of overcurrent threshold values Umax；0.1 ~ 999.9us of range of overcurrent time U.If electricity in real time
Flow two sub-values | Uin | it is greater than overcurrent threshold values Umax, and the state retention time is more than or equal to overcurrent time U, then overcurrent
Triggering.
Triggering manually:
If receiving the triggering control instruction of host computer, trigger manually.
Above-mentioned triggering mode almost includes all line anomalies or fault state.These signals are acquired in real time in low frequency
Afterwards, it needs to carry out trigger condition judgement to these signals that height can be triggered in time by above-mentioned criterion in the case where abnormal disturbances
Frequency transient state recording, to support the analysis and processing of full frequency-domain transient signal, to full frequency-domain recorder data corresponding to these situations
After being made a concrete analysis of, electric power relevant departments can take appropriate measures in time.
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 (10)
1. a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition characterized by comprising three signal inspections
The monitoring modular surveying module, communicating respectively with three signal detection modules, wherein each signal detection module connects nearby respectively
It connects in A phase or B phase or C phase line；
Each detection module includes low-frequency data acquisition submodule and high-frequency data acquisition submodule: low-frequency data acquires submodule
Block is used to carry out the whole acquisition in real time of low frequency signal to output cord, and the low-frequency data of output low frequency signal waveform acquires submodule
Block；High-frequency data acquisition submodule is used to work as detects the signal for meeting trigger condition in collected low frequency live signal
When, high speed full frequency-domain signal acquisition is carried out to output cord, exports full frequency-domain signal waveform；
It is mutually communicated between three signal detection modules, it is synchronous when one of signal detection module detects trigger signal
Other two signal detection modules are triggered, three signal detection modules carry out high-frequency data acquisition simultaneously；Each signal detection mould
Block is set in a cabinet, the chassis earth, and chassis shell body is equipped with heat release hole with heat loss through convection, and cabinet is equipped with one or more layers
Shielded layer；The monitoring modular is set to a monitoring cabinet.
2. a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition according to claim 1, feature
Be: the signal detection module includes two detection units, wherein a detection unit is connected with a voltage transformer, Ling Yijian
Survey unit be connected with a current transformer, the voltage transformer, current transformer respectively with A phase or B phase or C phase line phase
Even, acquisition and analysis processing of the detection unit for data.
3. a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition according to claim 2, feature
Be: the detection module includes partial pressure FM circuit, low frequency signal conditioning circuit, high-frequency signal conditioning circuit, low speed A/D turns
Change circuit, high-speed a/d conversion circuit, fpga chip, CPU processor and telecommunication circuit；The partial pressure FM circuit connection electricity
Mutual inductor or current transformer are pressed, 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. a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition according to claim 1, feature
Be: the monitoring modular includes fibre distribution frame, optical fiber switch, data concentrator, power port interchanger, clock expanded mode
Block, double-power supply switching device；
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；
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；
Described double-power supply switching device one end is extended with data concentrator, power port interchanger, clock respectively by optical fiber switch
Module connection, the other end connect with main power source module, standby power supply module respectively, have a power failure for some reason for main power source module and cut automatically
Change to standby power supply module.
5. a kind of adaptive full frequency-domain recording system that can trigger transient high frequency acquisition according to claim 3, feature
Be: the recording triggering fiber optic serial bus between each detection unit is connected using annular is carried out in the monitoring cabinet of multimode pigtail
It connects, realizes the synchronous recording record for triggering other detection units when a certain detection unit detects triggering Wave data, guarantee number
According to effectively reliably, the data communication optical fiber network interface of each detection unit is pooled to data switching exchane by multimode pigtail, realizes inspection
Survey the upload of unit recorder data.
6. using a kind of adaptive full frequency-domain recording that can trigger transient high frequency acquisition described in claim 1-5 any claim
The full frequency-domain Wave record method of system, which comprises the following steps:
The whole acquisition in real time of low frequency signal, output low frequency signal waveform are carried out to output cord；
When detecting the signal for meeting trigger condition in collected low frequency live signal, then high speed is carried out to output cord
Full frequency-domain signal acquisition exports full frequency-domain signal waveform.
7. a kind of full frequency-domain Wave record method according to claim 6, which is characterized in that the trigger signal includes: to adopt
In the live signal collected, if voltage effective value is greater than upper voltage limit threshold values or is less than lower voltage limit threshold values, triggering is generated
Signal.
8. a kind of full frequency-domain Wave record method according to claim 6, which is characterized in that if the trigger signal includes: line
Road is in power failure state, and in collected live signal, and real-time voltage absolute value is greater than over-voltage in the continuous some time
Value, then generate trigger signal；If route is in electriferous state, and in collected live signal, in the continuous some time
Real-time voltage absolute value is less than decompression value, then generates trigger signal；If route is in electriferous state, and collected real-time
In signal, real-time voltage absolute value is greater than overpressure value in the continuous some time, then generates trigger signal.
9. a kind of full frequency-domain Wave record method according to claim 6, which is characterized in that the trigger signal includes: to adopt
In the live signal collected, if transient voltage fluctuation Wave data is greater than transient disturbance increment, and the state retention time is greater than
Equal to transient disturbance time threshold, then trigger signal is generated.
10. a kind of full frequency-domain Wave record method according to claim 6, which is characterized in that the trigger signal includes:
In collected live signal, if current effective value is greater than upper current limit threshold values or is less than lower current limit threshold values,
Generate trigger signal；
In collected live signal, if transient current disturbance waveform data are greater than transient disturbance increment, and the state is kept
Time is more than or equal to transient disturbance time threshold, then generates trigger signal；
In collected live signal, if two sub-value of real-time current is greater than overcurrent threshold values, and the state retention time is greater than
Equal to overcurrent time threshold, then trigger signal is generated；
If receiving the triggering control instruction of host computer, trigger signal is generated.
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