CN104655979A - Method for generating failure travelling wave simulation signals - Google Patents
Method for generating failure travelling wave simulation signals Download PDFInfo
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Abstract
The invention discloses a method for generating failure travelling wave simulation signals and belongs to the technical field of power transmission detection. The method comprises the following steps: receiving and analyzing a waveform data downloading command and downloading waveform data into corresponding memory units by a main control unit, and respectively reading the waveform data from the memory units and outputting the data of the memory units to a digital-to-analog conversion unit through an auxiliary control unit; providing a playback address for the memory units and providing a playback clock for the digital-to-analog conversion unit through the auxiliary control unit; converting the quantity of the waveform data output by the memory units to an analog quantity by the digital-to-analog conversion unit; converting the analog quantity output by the digital-to-analog conversion unit to high-frequency current and outputting the high-frequency current by a current modular unit; inputting clock pulses into the main control unit by a global positioning system module. The method can solve the problems that true and effective failure travelling wave signals are difficult to obtain, the output travelling wave signals easily distort, and travelling wave signal sources are difficult to be synchronously triggered during double-terminal location.
Description
Technical field
The present invention relates to electric power transmission detection technique field, the method that especially a kind of fault traveling wave simulate signal produces.
Background technology
The uncertainty of and trouble spot longer due to transmission line of electricity in electric system, so the range finding of failure point of power transmission line just becomes particularly important.Trouble spot range finding accurately can reduce line walking scope, reduces power off time, improves line powering reliability.After transmission line of electricity breaks down, under the effect of trouble spot additional supply, circuit can produce the capable ripple of voltage and current close to light velocity propagation.The measurement utilizing row ripple to carry out trouble spot distance is a kind of effective transmission line malfunction detection means.A kind of both-end distance measuring method of transmission line malfunction, utilize current traveling wave signal as the signal that record ripple monitors and range finding is analyzed, the primary wave that Real-time Collection, record transmission line malfunction produce arrives the travelling wave signal detecting bus two ends, utilize wavelet transformation technique to analyze the mistiming at travelling wave signal arrival bus two ends, calculate position of failure point.For ensureing the validity of travelling wave ranging result, adopt fault traveling wave simulate signal as the source signal of travelling wave ranging.Existing fault traveling wave signal also exists: 1, be difficult to obtain authentic and valid fault traveling wave signal; 2, the frequency range due to fault traveling wave is wider, and high frequency can reach 100KHz, easily causes waveform distortion, is difficult to export effective travelling wave signal; 3, during both-end distance measuring, travelling wave signal source is difficult to accurate synchronization triggering; Problem.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of method that fault traveling wave simulate signal produces, the method that this fault traveling wave simulate signal produces can solve be difficult to obtain authentic and valid fault traveling wave signal, the easy distortion of travelling wave signal of output and both-end distance measuring time source travelling wave signal be difficult to the problem that accurate synchronization triggers.
In order to solve the problem, the technical solution adopted in the present invention is: the method that this fault traveling wave simulate signal produces, and comprising:
Main control unit and host computer set up communication, resolve the Wave data download command that host computer passes down, progressively the Wave data of each passage is downloaded to corresponding storage unit by data bus, and by secondary control unit pointwise reading Wave data from corresponding storage unit respectively, by secondary control unit, the data of storage unit are outputted to the step of D/A conversion unit simultaneously;
Secondary control unit provides playback address, for D/A conversion unit provides the step of playback clock for storage unit;
The Wave data amount that storage unit exports by D/A conversion unit is converted to the step of analog quantity;
The step that the high-frequency current that the analog quantity that D/A conversion unit exports is transferred to preset size by current module unit exports;
GPS module opens the step into time clock to main control unit;
Wherein, host computer issues Wave data download command to main control unit, main control unit resolves the Wave data download command of host computer input, secondary control unit receives the playback address command of main control unit input simultaneously, corresponding playback address signal is distributed to the storage unit of each passage, corresponding Wave data progressively downloads in storage unit by data bus according to playback address by main control unit, when waveform signal meets trigger condition, the timing of secondary control unit starting playback clock, the simultaneously memory unit address that provides according to pair control unit of main control unit, from corresponding storage unit, pointwise is read Wave data and this Wave data is outputted to D/A conversion unit respectively, D/A conversion unit changes this digital quantity into analog quantity, by current module unit, this analog quantity is transferred to the high-frequency current of preset size again.
In the technical scheme of the method that above-mentioned fault traveling wave simulate signal produces, technical scheme can also be more specifically: described main control unit is DSP5402 digital processing unit, described pair control unit is multiple programmable gate array modules, described storage unit is the storer of 16 bit widths, the static random-access of 512K capacity.
Further: the mode of described triggering is that manual triggers or intake trigger or GPS module point trigger action.
Owing to have employed technique scheme, the present invention compared with prior art has following beneficial effect:
1, this method exports based on high speed traveling-wave current source high precision, and output sampling rate reaches 6.5MHz, and the current output channels response time is less than 1us, can meet travelling wave ranging and start the reliability of judgement, the accuracy requirement of failure criterion.
2, utilize GPS synchronizing pulse, as the synchronous triggering of the capable wave source of double-ended current, solve the time synchronized sex chromosome mosaicism of strange land experiment, time error is less than 0.5us.
3, according to fault traveling wave signal acquisition emulation travelling wave signal real on transmission line of electricity, meet initiation value inspection, single-ended inspection and both-end examination requirements simultaneously.
4, utilize current channel sampling rate up to 6.5MHz, the current output channels time is less than the high-speed row signal wave current of 1us as the source signal of finding range, and solves row ripple and exports problem of dtmf distortion DTMF.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the invention will be further described:
The method that fault traveling wave simulate signal shown in Fig. 1 produces, utilizes a kind of travelling wave ranging calibration equipment, and this device includes interconnective host computer, main control unit, secondary control unit, storage unit, D/A conversion unit and current module unit; Main control unit, communication is set up by parallel interface and host computer, resolve the Wave data download command that host computer passes down, progressively the Wave data of each passage is downloaded to corresponding storage unit by data bus, and control secondary control unit pointwise reading Wave data from corresponding storage unit respectively, by secondary control unit, the data of storage unit are outputted to D/A conversion unit simultaneously; Secondary control unit, for providing playback address for storage unit, for D/A conversion unit provides playback clock; D/A conversion unit, is converted to analog quantity for Wave data amount storage unit exported; Current module unit, the high-frequency current that the analog quantity for being exported by D/A conversion unit transfers preset size to exports; GPS module, for opening into time clock to main control unit.
Main control unit is DSP5402 digital processing unit, and secondary control unit is multiple programmable gate array modules, and storage unit is the storer of 16 bit widths, the static random-access of 512K capacity.
During work, host computer issues Wave data download command by the simulation software of Electromagnetic Transient Analysis of Power System to DSP5402 digital processing unit by needing the waveform recording file exported, the data download command of host computer input resolved by DSP5402 digital processing unit, programmable gate array module receives the playback address command of DSP5402 digital processing unit input simultaneously, corresponding playback address signal is distributed to the storer of institute's control channel, corresponding Wave data is progressively downloaded in storer by data bus according to playback address by DSP5402 digital processing unit.After the data download of each passage, when waveform signal meets trigger condition, programmable gate array module starts playback clock timing, the simultaneously storage address that provides according to programmable gate array module of DSP5402 digital processing unit, from corresponding storer, pointwise is read Wave data and this Wave data is outputted to D/A conversion unit respectively, D/A conversion unit changes this digital quantity into analog quantity, transfer the analog quantity that D/A conversion unit exports to waveform rise and fall time by current module unit again and be less than 3 μ s, the high-frequency current signal that signal frequency is up to 500KHz exports.Because each programmable gate array module adopts same clock source to drive, therefore, it is possible to ensure that the output signal of each passage can stringent synchronization.
The mode triggered is that manual triggers or intake trigger or GPS module point trigger action.
Claims (3)
1. a method for fault traveling wave simulate signal generation, is characterized in that, comprising:
Main control unit and host computer set up communication, resolve the Wave data download command that host computer passes down, progressively the Wave data of each passage is downloaded to corresponding storage unit by data bus, and by secondary control unit pointwise reading Wave data from corresponding storage unit respectively, by secondary control unit, the data of storage unit are outputted to the step of D/A conversion unit simultaneously;
Secondary control unit provides playback address, for D/A conversion unit provides the step of playback clock for storage unit;
The Wave data amount that storage unit exports by D/A conversion unit is converted to the step of analog quantity;
The step that the high-frequency current that the analog quantity that D/A conversion unit exports is transferred to preset size by current module unit exports;
GPS module opens the step into time clock to main control unit;
Wherein, host computer issues Wave data download command to main control unit, main control unit resolves the Wave data download command of host computer input, secondary control unit receives the playback address command of main control unit input simultaneously, corresponding playback address signal is distributed to the storage unit of each passage, corresponding Wave data progressively downloads in storage unit by data bus according to playback address by main control unit, when waveform signal meets trigger condition, the timing of secondary control unit starting playback clock, the simultaneously memory unit address that provides according to pair control unit of main control unit, from corresponding storage unit, pointwise is read Wave data and this Wave data is outputted to D/A conversion unit respectively, D/A conversion unit changes this digital quantity into analog quantity, by current module unit, this analog quantity is transferred to the high-frequency current of preset size again.
2. the method for fault traveling wave simulate signal generation according to claim 1, it is characterized in that: described main control unit is DSP5402 digital processing unit, described pair control unit is multiple programmable gate array modules, described storage unit is the storer of 16 bit widths, the static random-access of 512K capacity.
3. the method for fault traveling wave simulate signal generation according to claim 1 and 2, is characterized in that: the mode of described triggering is that manual triggers or intake trigger or GPS module point trigger action.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044407A (en) * | 2015-06-30 | 2015-11-11 | 株洲南车时代电气股份有限公司 | Method and device for generating random simulation waveforms |
| CN108414894A (en) * | 2018-03-12 | 2018-08-17 | 武汉三相电力科技有限公司 | Traveling wave generating means and controllable traveling wave generating means |
| CN109374976A (en) * | 2018-10-19 | 2019-02-22 | 中国人民解放军空军勤务学院 | A kind of online ground resistance Fast measurement system |
| CN111929630A (en) * | 2020-07-13 | 2020-11-13 | 中国南方电网有限责任公司超高压输电公司柳州局 | Method and device for detecting saturation of current transformer |
| CN113049915A (en) * | 2021-03-17 | 2021-06-29 | 福建奥通迈胜电力科技有限公司 | Fault simulation system for recording-type fault indicator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928574A (en) * | 2005-09-09 | 2007-03-14 | 北京富瑞菲格电力科技有限公司 | Traveling wave accidents distance measuring device for hour and minute composite sampling electric transmission line |
| CN201203660Y (en) * | 2008-05-04 | 2009-03-04 | 深圳市索图科技有限公司 | Distance measurer for electric power system voltage traveling wave |
| JP2010261735A (en) * | 2009-04-30 | 2010-11-18 | Furukawa Electric Co Ltd:The | Method for testing quality of solid insulation cable |
| CN201845066U (en) * | 2010-11-12 | 2011-05-25 | 江西省电力科学研究院 | Transmission line traveling wave malfunction distance measuring apparatus for intelligent transformer substation |
| CN102221662A (en) * | 2011-03-29 | 2011-10-19 | 深圳市索图科技有限公司 | Small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus |
| WO2012150232A1 (en) * | 2011-05-03 | 2012-11-08 | Alstom Technology Ltd | Device and method for detecting and locating a fault on a gas-insulated coaxial electrical cable |
| CN102890223A (en) * | 2012-08-29 | 2013-01-23 | 国家电网公司 | Fault traveling wave locating system for power line |
-
2014
- 2014-02-25 CN CN201410062969.1A patent/CN104655979B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928574A (en) * | 2005-09-09 | 2007-03-14 | 北京富瑞菲格电力科技有限公司 | Traveling wave accidents distance measuring device for hour and minute composite sampling electric transmission line |
| CN201203660Y (en) * | 2008-05-04 | 2009-03-04 | 深圳市索图科技有限公司 | Distance measurer for electric power system voltage traveling wave |
| JP2010261735A (en) * | 2009-04-30 | 2010-11-18 | Furukawa Electric Co Ltd:The | Method for testing quality of solid insulation cable |
| CN201845066U (en) * | 2010-11-12 | 2011-05-25 | 江西省电力科学研究院 | Transmission line traveling wave malfunction distance measuring apparatus for intelligent transformer substation |
| CN102221662A (en) * | 2011-03-29 | 2011-10-19 | 深圳市索图科技有限公司 | Small current grounding system single phase earth fault traveling wave line selection and distance measurement apparatus |
| WO2012150232A1 (en) * | 2011-05-03 | 2012-11-08 | Alstom Technology Ltd | Device and method for detecting and locating a fault on a gas-insulated coaxial electrical cable |
| CN102890223A (en) * | 2012-08-29 | 2013-01-23 | 国家电网公司 | Fault traveling wave locating system for power line |
Non-Patent Citations (2)
| Title |
|---|
| 甄威 等: "输电线路行波仿真方法及行波试验技术", 《电力自动化设备》 * |
| 马永明 等: "基于MATLAB的输电线路故障行波仿真平台", 《山东理工大学学报（自然科学版）》》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044407A (en) * | 2015-06-30 | 2015-11-11 | 株洲南车时代电气股份有限公司 | Method and device for generating random simulation waveforms |
| CN108414894A (en) * | 2018-03-12 | 2018-08-17 | 武汉三相电力科技有限公司 | Traveling wave generating means and controllable traveling wave generating means |
| CN108414894B (en) * | 2018-03-12 | 2020-04-24 | 武汉三相电力科技有限公司 | Travelling wave generating device and controllable travelling wave generating device |
| CN109374976A (en) * | 2018-10-19 | 2019-02-22 | 中国人民解放军空军勤务学院 | A kind of online ground resistance Fast measurement system |
| CN111929630A (en) * | 2020-07-13 | 2020-11-13 | 中国南方电网有限责任公司超高压输电公司柳州局 | Method and device for detecting saturation of current transformer |
| CN111929630B (en) * | 2020-07-13 | 2023-05-16 | 中国南方电网有限责任公司超高压输电公司柳州局 | Method and device for detecting saturation of current transformer |
| CN113049915A (en) * | 2021-03-17 | 2021-06-29 | 福建奥通迈胜电力科技有限公司 | Fault simulation system for recording-type fault indicator |
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