CN110161301A - A kind of anti-interference type lightning current waveform gathering algorithm - Google Patents
A kind of anti-interference type lightning current waveform gathering algorithm Download PDFInfo
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- CN110161301A CN110161301A CN201910548584.9A CN201910548584A CN110161301A CN 110161301 A CN110161301 A CN 110161301A CN 201910548584 A CN201910548584 A CN 201910548584A CN 110161301 A CN110161301 A CN 110161301A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
- G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/14—Indicating direction of current; Indicating polarity of voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
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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
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
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Abstract
The invention discloses a kind of anti-interference type lightning current waveform gathering algorithms.The gathering algorithm is by obtaining the multichannel lightning current waveform sampled data on same transmission line of electricity；And to the amplitude of multi-channel sampling data, waveform triggers polarity, frequency, which compares, to be compared, obtain the similarity information of multi-channel sampling data between any two, it can quickly determine whether lightning current is true lightning strike signals according to similarity information, noise jamming can effectively be removed, rapidly extracting goes out lightning current waveform signal, the present invention is compared with existing algorithm, eliminate the wave character comparison algorithm of the rear class complexity in existing algorithm, it can quick and precisely identify lightning current waveform, realize exhaustive acquisition and recording, and, Acquisition Circuit can be greatly simplified using gathering algorithm of the present invention to design, simple FPGA circuitry is only needed to can be carried out acquiring and handle, save design resource, convenient for large-scale application popularization.It is suitble to promote and apply in on-line monitoring field.
Description
Technical field
The present invention relates to on-line monitoring fields, and in particular to a kind of anti-interference type lightning current waveform gathering algorithm.
Background technique
Lightning stroke is that a key factor of influence transmission line of electricity operational safety needs to arrange due to the demand of electric power safety
A large amount of lightning current acquisition device accurately flutters the thunder and lightning flow data caught and occurred on defeated each distribution network, so as to transmission and distribution line
Road is accurately protected and is managed, and existing lightning current acquisition device generallys use the algorithm of feature identification to identify lightning current
Waveform and interference waveform, this algorithm need to acquire a large amount of lightning current characteristic, carry out complexity by rear level processor
Operation could remove noise signal, keep lightning current acquisition device circuit design more complicated, consumed resource is larger, is unfavorable for
Large-scale promotion and application.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind can effectively remove noise jamming, can rapidly extracting go out
Lightning current waveform, and resource consumption is saved, conducive to the anti-interference type lightning current waveform of large-scale promotion application on the transmission line
Gathering algorithm.
The technical proposal adopted by the invention to solve the above technical problems is that: anti-interference type lightning current waveform acquisition is calculated
Method includes the following steps:
A, acquisition amplitude threshold, the amplitude disparity range, amplitude similarity ratio, waveform trigger electrode of thunder and lightning waveform are set
Property, frequency range；
B, the multichannel lightning current waveform voltage analog signal on same transmission line of electricity is obtained, and to the multichannel lightning current of acquisition
Waveform voltage analog signal is acquired amplitude threshold judgement respectively, will be less than the lightning current waveform voltage-mode of acquisition amplitude threshold
Quasi- signal is rejected, and remaining lightning current waveform voltage analog signal passed through ADC is respectively converted to digital signal and obtain multichannel
Sampled data；
C, difference comparsion two-by-two is carried out to the amplitude of multi-channel sampling data and obtains multiple groups amplitude difference value, every group will obtained
Amplitude difference value is determined with setting amplitude disparity range respectively, is counted the amplitude quantity fallen into amplitude disparity range and is counted
The ratio value for calculating group amplitude difference value quantity where it is accounted for, the amplitude similarity ratio of the ratio that obtains and setting is compared and is sentenced
It is fixed, if the ratio being calculated is greater than the amplitude similarity ratio of setting, the waveform for the two-way sampled data organized where determining
Place is determined if the ratio being calculated is less than or equal to the amplitude similarity ratio of setting for effective lightning current waveform
The waveform of the two-way sampled data of group is invalid lightning current waveform, and corresponding invalid sampled data is rejected；
D, the multi-channel sampling data obtained after step C processing are subjected to polarity judgement, obtain multi-channel sampling data
Waveform triggers polarity, the waveform triggering polarity that obtained every road waveform triggers polarity and setting is compared judgement, if the two
Waveform triggering polarity it is identical, then determine the road sampled data waveform be effective lightning current waveform, if the waveform of the two touches
It sends out that polarity is not identical, then determines that the waveform of the road sampled data is invalid lightning current waveform, and by corresponding invalid hits
According to rejecting；
E, the multi-channel sampling data obtained after step D processing are filtered and are handled with Fourier transformation, obtained
It compares and sentences to the frequency of multi-channel sampling data, and by the obtained frequency of every road sampled data and the frequency range of setting
It is fixed, if the frequency of the road sampled data is fallen within the frequency range of setting, determine that the waveform of the road sampled data is effective
Lightning current waveform determine the road hits if the frequency of the road sampled data is not fallen within the frequency range of setting
According to waveform be invalid lightning current waveform, and will corresponding invalid sampled data rejecting；
F, the frequency for effective lightning current waveform that extraction step E is obtained, maximum amplitude, waveform trigger polarity, count thunder and lightning
Frequency, amplitude and waveform the triggering polarity and number of lightning strokes for flowing waveform, calculate the amplitude mean value and performance number of lightning current waveform,
And obtained above-mentioned data are reported to remote control terminal, complete the acquisition of lightning current waveform.
Further, in stepb, obtaining the lightning current waveform voltage analog signal on same transmission line of electricity is two
Road.
Further, obtaining the letter of the lightning current waveform voltage analog on same transmission line of electricity using Rogowski coil sensor
Number.
Beneficial effects of the present invention: the anti-interference type lightning current waveform gathering algorithm is by obtaining on same transmission line of electricity
Multichannel lightning current waveform voltage analog signal is simultaneously acquired width to the multichannel lightning current waveform voltage analog signal of acquisition respectively
It spends thresholding to determine, the lightning current waveform voltage analog signal that will be less than acquisition amplitude threshold is rejected, and by remaining lightning current wave
Shape voltage analog signal, which passes through ADC respectively and is converted to digital signal, obtains multi-channel sampling data；Then to multi-channel sampling data
Amplitude, waveform triggering polarity, frequency compare and compare, and obtain the similarity information of multi-channel sampling data between any two, root
It can quickly determine whether lightning current is true lightning strike signals according to similarity information, can effectively remove noise jamming, fastly
Speed extracts lightning current waveform signal, and the present invention eliminates the waveform of the rear class complexity in existing algorithm compared with existing algorithm
Feature comparison algorithm can quick and precisely identify lightning current waveform, realize exhaustive acquisition and recording, moreover, utilizing institute of the present invention
The anti-interference type lightning current waveform gathering algorithm stated can greatly simplify Acquisition Circuit design, it is only necessary to which simple FPGA circuitry is just
It can be acquired and handle, save design resource, be promoted convenient for large-scale application.
Specific embodiment
The anti-interference type lightning current waveform gathering algorithm, includes the following steps:
A, acquisition amplitude threshold, the amplitude disparity range, amplitude similarity ratio, waveform trigger electrode of thunder and lightning waveform are set
Property, frequency range；Its specific parameter value can sets itself according to the actual situation；
B, the multichannel lightning current waveform voltage analog signal on same transmission line of electricity is obtained, and to the multichannel lightning current of acquisition
Waveform voltage analog signal is acquired amplitude threshold judgement respectively, will be less than the lightning current waveform voltage-mode of acquisition amplitude threshold
Quasi- signal is rejected, and remaining lightning current waveform voltage analog signal passed through ADC is respectively converted to digital signal and obtain multichannel
Sampled data；
C, difference comparsion two-by-two is carried out to the amplitude of multi-channel sampling data and obtains multiple groups amplitude difference value, every group will obtained
Amplitude difference value is determined with setting amplitude disparity range respectively, is counted the amplitude quantity fallen into amplitude disparity range and is counted
The ratio value for calculating group amplitude difference value quantity where it is accounted for, the amplitude similarity ratio of the ratio that obtains and setting is compared and is sentenced
It is fixed, if the ratio being calculated is greater than the amplitude similarity ratio of setting, the waveform for the two-way sampled data organized where determining
Place is determined if the ratio being calculated is less than or equal to the amplitude similarity ratio of setting for effective lightning current waveform
The waveform of the two-way sampled data of group is invalid lightning current waveform, and corresponding invalid sampled data is rejected；
D, the multi-channel sampling data obtained after step C processing are subjected to polarity judgement, obtain multi-channel sampling data
Waveform triggers polarity, the waveform triggering polarity that obtained every road waveform triggers polarity and setting is compared judgement, if the two
Waveform triggering polarity it is identical, then determine the road sampled data waveform be effective lightning current waveform, if the waveform of the two touches
It sends out that polarity is not identical, then determines that the waveform of the road sampled data is invalid lightning current waveform, and by corresponding invalid hits
According to rejecting；
E, the multi-channel sampling data obtained after step D processing are filtered and are handled with Fourier transformation, obtained
It compares and sentences to the frequency of multi-channel sampling data, and by the obtained frequency of every road sampled data and the frequency range of setting
It is fixed, if the frequency of the road sampled data is fallen within the frequency range of setting, determine that the waveform of the road sampled data is effective
Lightning current waveform determine the road hits if the frequency of the road sampled data is not fallen within the frequency range of setting
According to waveform be invalid lightning current waveform, and will corresponding invalid sampled data rejecting；
F, the frequency for effective lightning current waveform that extraction step E is obtained, maximum amplitude, waveform trigger polarity, count thunder and lightning
Frequency, amplitude and waveform the triggering polarity and number of lightning strokes for flowing waveform, calculate the amplitude mean value and performance number of lightning current waveform,
And obtained above-mentioned data are reported to remote control terminal, complete the acquisition of lightning current waveform.
The anti-interference type lightning current waveform gathering algorithm is by obtaining the multichannel lightning current waveform electricity on same transmission line of electricity
Pressure analog signal is simultaneously acquired amplitude threshold judgement to the multichannel lightning current waveform voltage analog signal of acquisition respectively, will be less than
The lightning current waveform voltage analog signal for acquiring amplitude threshold is rejected, and remaining lightning current waveform voltage analog signal is distinguished
Digital signal, which is converted to, by ADC obtains multi-channel sampling data；Then to the amplitude of multi-channel sampling data, waveform triggering polarity,
Frequency, which compares, to be compared, and the similarity information of multi-channel sampling data between any two is obtained, can be fast according to similarity information
Whether the judgement lightning current of speed is true lightning strike signals, can effectively remove noise jamming, rapidly extracting goes out lightning current waveform
Signal, the present invention eliminate the wave character comparison algorithm of the rear class complexity in existing algorithm compared with existing algorithm, can be fast
Speed accurately identifies lightning current waveform, exhaustive acquisition and recording is realized, moreover, utilizing anti-interference type lightning current wave of the present invention
Shape gathering algorithm can greatly simplify Acquisition Circuit design, it is only necessary to and simple FPGA circuitry can be carried out acquiring and handle,
Design resource is saved, is promoted convenient for large-scale application.
In the above-described embodiment, in stepb, the lightning current waveform voltage analog signal on same transmission line of electricity is obtained
It can be multichannel, preferably, general two-way can meet acquisition and require, and will not increase the design difficulty of Acquisition Circuit.
Obtain lightning current waveform voltage on same transmission line of electricity can be acquired using existing various types of lightning currents sensors into
The acquisition of row thunder and lightning flow data, preferably, the present invention obtains the thunder and lightning on same transmission line of electricity using Rogowski coil sensor
Flow waveform voltage analog signal.
Claims (3)
1. a kind of anti-interference type lightning current waveform gathering algorithm, it is characterised in that include the following steps:
A, acquisition amplitude threshold, amplitude disparity range, amplitude similarity ratio, the waveform for setting thunder and lightning waveform trigger polarity, frequency
Rate range；
B, the multichannel lightning current waveform voltage analog signal on same transmission line of electricity is obtained, and to the multichannel lightning current waveform of acquisition
Voltage analog signal is acquired amplitude threshold judgement respectively, and the lightning current waveform voltage analog for being less than acquisition amplitude threshold is believed
It number rejects, and remaining lightning current waveform voltage analog signal passed through into ADC is respectively converted to digital signal and obtain multi-channel sampling
Data；
C, difference comparsion two-by-two is carried out to the amplitude of multi-channel sampling data and obtains multiple groups amplitude difference value, the every group of amplitude that will be obtained
Difference value is determined with setting amplitude disparity range respectively, is counted the amplitude quantity fallen into amplitude disparity range and is calculated it
The ratio value of group amplitude difference value quantity, compares judgement for the ratio that obtains and the amplitude similarity ratio of setting where accounting for,
If the ratio being calculated is greater than the amplitude similarity ratio of setting, the waveform for the two-way sampled data organized where determining is to have
The lightning current waveform of effect is organized where determining if the ratio being calculated is less than or equal to the amplitude similarity ratio of setting
The waveform of two-way sampled data is invalid lightning current waveform, and corresponding invalid sampled data is rejected；
D, the multi-channel sampling data obtained after step C processing are subjected to polarity judgement, obtain the waveform of multi-channel sampling data
Polarity is triggered, the waveform triggering polarity that obtained every road waveform triggers polarity and setting is compared into judgement, if the wave of the two
Shape triggering polarity is identical, then determines that the waveform of the road sampled data is effective lightning current waveform, if the waveform trigger electrode of the two
Property it is not identical, then determine that the waveform of the road sampled data is invalid lightning current waveform, and corresponding invalid sampled data picked
It removes；
E, the multi-channel sampling data obtained after step D processing are filtered and are handled with Fourier transformation, obtained more
The frequency of road sampled data, and the obtained frequency of every road sampled data and the frequency range of setting are compared into judgement, if
The frequency of the road sampled data is fallen within the frequency range of setting, then determines that the waveform of the road sampled data is effective thunder and lightning
It flows waveform and determines the wave of the road sampled data if the frequency of the road sampled data is not fallen within the frequency range of setting
Shape is invalid lightning current waveform, and corresponding invalid sampled data is rejected；
F, the frequency for effective lightning current waveform that extraction step E is obtained, maximum amplitude, waveform trigger polarity, count lightning current wave
Frequency, amplitude and the waveform triggering polarity and number of lightning strokes of shape, calculate the amplitude mean value and performance number of lightning current waveform, and will
Obtained above-mentioned data are reported to remote control terminal, complete the acquisition of lightning current waveform.
2. anti-interference type lightning current waveform gathering algorithm as described in claim 1, it is characterised in that: in stepb, obtain same
Lightning current waveform voltage analog signal on one transmission line of electricity is two-way.
3. anti-interference type lightning current waveform gathering algorithm as claimed in claim 2, it is characterised in that: sensed using Rogowski coil
Device obtains the lightning current waveform voltage analog signal on same transmission line of electricity.
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| CN110988448A (en) * | 2019-12-12 | 2020-04-10 | 厦门市爱维达电子有限公司 | Filtering method applied to UPS bus voltage sampling |
| CN112305406A (en) * | 2020-10-14 | 2021-02-02 | 上海华虹宏力半导体制造有限公司 | Chip micro analog signal testing method and device |
| CN113447701A (en) * | 2021-05-18 | 2021-09-28 | 熊秀 | Lightning current peak value calibration method and device |
| CN113552445A (en) * | 2021-06-17 | 2021-10-26 | 昆明理工大学 | Multiple lightning stroke waveform parameter identification method |
| CN115236385A (en) * | 2022-07-26 | 2022-10-25 | 国家电网有限公司 | Automatic identification method for waveform polarity of high-frequency pulse current |
| CN115840104A (en) * | 2023-02-24 | 2023-03-24 | 威海赛宝工业信息技术研究院有限公司 | Interference signal identification method based on electromagnetic compatibility experiment |
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| CN110988448A (en) * | 2019-12-12 | 2020-04-10 | 厦门市爱维达电子有限公司 | Filtering method applied to UPS bus voltage sampling |
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| CN113552445A (en) * | 2021-06-17 | 2021-10-26 | 昆明理工大学 | Multiple lightning stroke waveform parameter identification method |
| CN113552445B (en) * | 2021-06-17 | 2023-03-14 | 昆明理工大学 | Multiple lightning stroke waveform parameter identification method |
| CN115236385A (en) * | 2022-07-26 | 2022-10-25 | 国家电网有限公司 | Automatic identification method for waveform polarity of high-frequency pulse current |
| CN115840104A (en) * | 2023-02-24 | 2023-03-24 | 威海赛宝工业信息技术研究院有限公司 | Interference signal identification method based on electromagnetic compatibility experiment |
| CN115840104B (en) * | 2023-02-24 | 2023-04-28 | 威海赛宝工业信息技术研究院有限公司 | Interference signal identification method based on electromagnetic compatibility experiment |
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