CN104156320A - Method for collecting traveling wave data of power transmission line fault locating device - Google Patents
Method for collecting traveling wave data of power transmission line fault locating device Download PDFInfo
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- CN104156320A CN104156320A CN201310174169.4A CN201310174169A CN104156320A CN 104156320 A CN104156320 A CN 104156320A CN 201310174169 A CN201310174169 A CN 201310174169A CN 104156320 A CN104156320 A CN 104156320A
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Abstract
The invention discloses a method for collecting traveling wave data of a power transmission line fault locating device. By means of the method, three-level data cache regions of an FPGA are expanded, namely, a built-in RAM cache region, an external SRAM cache region and a GPRS DTU cache region of the FPGA; moreover, through saturated early warning mechanisms of all the cache regions, the problems that in the traveling wave fault locating process, the data transmission bit error rate is high due to improper traveling wave acquisition and data processing, the traveling wave locating accuracy is low due to the fact that some traveling wave data are lost, and the traveling wave fault diagnosis false alarm rate is high are effectively solved.
Description
Affiliated technical field
The present invention relates to the travelling wave signal data processing field of transmission line online monitoring system, share and the method for designing of saturated early warning mechanism in the row wave datum memory buffers district that relates in particular to a kind of transmission line travelling wave fault locator.
Background technology
Ultra-high-tension power transmission line fed distance is long, and process with a varied topography is the highest place of rate of breakdown in grid.Transmission line malfunction forms larger threat to the safe operation of system, has brought the burden of heavy looking up the fault point also to circuit operation maintenance personnel.Trouble spot fast, accurate location, can greatly shorten faulty line repair time, reduce the loss causing because having a power failure, there is great society and economic benefit.In the construction of national intelligent grid, the related products of transmission line travelling wave intelligent fault monitoring system aspects also engenders in actual applications.
Transient state travelling wave signal after transmission line short-circuit fault occurs, its different frequency component has different speed and decay, the Travelling Wave Fault Location system of transmission line of electricity is comprehensively to analyze by the voltage traveling wave of circuit appearance after fault is occurred and the sampled value of current traveling wave, determine that fault traveling wave wave head arrives the accurate moment of measurement point on circuit, realizes accurate fault location.
Because row ripple pace of change is exceedingly fast, for the collection of the extremely short High-speed transient travelling wave signal of change procedure, use high-speed AD circle collection just can collect more effective waveform.Row ripple monitoring terminal is to adopt the built-in buffer memory RAM of FPGA to store for the traditional method of row wave datum aspect hardware design, first pattern aspect image data for gathering 12 bit data, serial ports step-by-step output after collection, after waiting for that 12 bit data are all exported, carry out second step sampling, for saving time and buffer area, first that the data acquisition of second step sampling is good in the output of first step data.Because the internal RAM buffer area of FPGA itself is 100Kbyte, at GPRS, communicate by letter good in the situation that, can guarantee to store 10 row wave datum and normally upload.Because row wave datum is transmitted and needed the regular hour by GPRS, be generally several seconds, the risk therefore existing is like this data sampling life period interval, may cause the row ripple of continuous trigger all not collect.For example, while occurring during multiple thunderbolt, because FPGA does not now open, data are stored and processing capacity causes separating brake waveform to be lost, and transmission line travelling wave localization of fault is brought to great impact.
In to travelling wave signal gatherer process, its digital signal processing is more crucial, and it directly determines transmission line travelling wave localization of fault precision and reliability.Because travelling wave signal is high-frequency signal, if data continuous acquisition, data volume is larger, brings pressure to GPRS data transmission, and easily causes the buffer overflow of FPGA, and row wave datum is lost data, and localization of fault precision is exerted an influence.
Therefore, need a kind of method badly and can effectively solve buffer overflow, row wave datum is lost, the problem that positioning precision and reliability reduce.
Summary of the invention
The object of this invention is to provide the capable wave datum acquisition method of a kind of transmission line fault locating device, solve the buffer overflow that traveling wave fault monitoring system exists, row wave datum is lost problem.The method is adopted sharing and saturated early warning mechanism of hardware memory system buffer area, and the method mainly comprises the steps:
(i) judge the saturated pre-warning mark in sram cache district shows whether be saturated.First FPGA data processing unit judges the saturated pre-warning mark in sram cache district shows whether be saturated, saturated limits value can preset (being made as 90%), if it is saturated that sram cache district does not have, row wave datum is deposited in to SRAM, row wave datum memory buffers district shared mechanism is using SRAM as the first buffer area.
(ii) follow-up reception data are stored.If saturated pre-warning mark display buffer district, sram cache district is soon saturated, now follow-up reception data are deposited in to FPGA built-in RAM buffer area, row wave datum memory buffers district shared mechanism is using the built-in RAM of FPGA as the second buffer memory.
(iii) judge whether the saturated pre-warning mark of built-in RAM buffer area is saturated, and carry out data processing.When the saturated pre-warning mark of built-in RAM buffer area represents to be also about to when saturated, to deposit row wave datum in GPRS DTU buffer area according to GPRS DTU buffer area situation, now GPRS DTU buffer memory is as the 3rd buffer area of row wave datum memory buffers district shared mechanism; Whether GPRS DTU buffer area allows to deposit in row wave datum is divided into two kinds of situations, be FPGA according to the online situation of GPRS DTU and whether buffer area saturated judges whether to deposit wave datum to be issued in a DTU buffer memory, the storage of these data meets the second buffer memory and does not send the condition of saturated early warning; Another kind is that the second buffer memory sends saturated early warning and follow-up row wave datum importance of coming up is very high, and this type of high priority data deposits DTU buffer area in, through wireless transmission, is uploaded to data center.
(iv) to GPRS DTU, send row wave datum.Central processing unit FPGA according to GPRS DTU whether online and buffer area whether send saturated early warning, judge whether to send row wave datum to GPRS DTU; Steering logic meets the online and buffer area of GPRS DTU simultaneously while not sending saturated early warning, and FPGA just sends data to it.
The three DBMS buffer memorys that the present invention utilizes outside expansion SRAM, FPGA built-in RAM and GPRS DTU to form are shared and saturated early warning mechanism, effectively prevent buffer overflow, and the row wave datum causing is lost problem.Solved in the collection of traditional row wave datum because of row wave datum send cannot meet continuous wave high speed acquisition with continuous acquisition data because communicate by letter and the saturated two large technical barriers that cause row wave datum loss of buffer memory, can realize transmission line travelling wave localization of fault on-line monitoring system and have that job stability is high, diagnostic result reliability is strong, positioning precision is advantage accurately.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is that share and the structured flowchart of saturated early warning mechanism in row wave datum memory buffers district.
Fig. 2 is that share and saturated early warning mechanism logic control chart in row wave datum memory buffers district.
Fig. 3 is FPGA and GPRS DTU data communication logic control chart.
Embodiment
In Fig. 1, share in row wave datum memory buffers district and external SRAM data-carrier store, FPGA built-in RAM, the GPRS DTU buffer area of the structured flowchart of saturated early warning mechanism are set up connecting relation by fpga logic control module, wherein fpga logic control module plays " bridge " effect, three buffer areas are linked together, and FPGA can control according to buffer area remaining space the memory location of row wave datum, guarantee that magnanimity row wave datum can store any one buffer area smoothly into, and FPGA can read row ripple storage data from any buffer area.
In Fig. 2, the priority of having shown the memory address of row wave datum storage system with saturated early warning mechanism logic control chart is shared in row wave datum memory buffers district, after magnanimity row wave datum is received by FPGA, first FPGA judges the saturated pre-warning mark in sram cache district shows whether be saturated, if it is saturated that sram cache district does not have, row wave datum is deposited in to SRAM, when hardware design, according to practice, adopted jumbo SRAM, generally can guarantee a large amount of row wave datum when traveling wave fault can be stored in sram cache space, row wave datum memory buffers district shared mechanism is using SRAM as the first buffer memory.But when multiple thunderbolt, row wave datum amount is very large, and GPRS DTU is while sending to data center by data, may cause too much causing the saturated situation in sram cache district because of the accumulation of row wave datum.Therefore, if saturated pre-warning mark display buffer district, sram cache district is soon saturated, now follow-up reception data are deposited in to FPGA built-in RAM buffer area, in row wave datum memory buffers district shared mechanism using the built-in RAM of FPGA as the second buffer memory.When the saturated pre-warning mark of built-in RAM buffer area represents to be also about to when saturated, to deposit row wave datum in GPRS DTU buffer area according to GPRS DTU buffer area situation, now GPRS DTU buffer memory is as the 3rd buffer area of row wave datum memory buffers district shared mechanism.
In Fig. 3, FPGA and GPRS DTU data communication logic control chart have shown whether row wave datum is sent to the steering logic of GPRS DTU by FPGA.While only having online and its buffer area of GPRS DTU not send saturated early warning according to the steering logic in Fig. 3, FPGA just sends row wave datum to it, otherwise to it, does not send data.
The inventive method can effectively be avoided that data factor data communication quality is poor and DTU buffer area is saturated and lose important row ripple information; The problem that can solve well multiple when thunderbolt data acquisition life period interval causes separating brake waveform to be lost when the capable ripple of separating brake is propagated through travelling wave signal pick-up transducers while occurring, guaranteeing can be because buffer area is saturated and the problem of communication loss data under the acquisition time of travelling wave signal and two kinds of patterns of continuous acquisition.Can realize the continuous recording to multiple transmission line of lightning strike, solve that existing equipment can record multiple thunderbolt and cannot identification whether hit continuously the problem of transmission line of electricity.On-the-spot a large amount of service data shows correctness and the validity of the inventive method.
Claims (5)
1. the capable wave datum acquisition method of transmission line fault locating device, is characterized in that comprising the steps:
Judge the saturated pre-warning mark in sram cache district shows whether be saturated;
Follow-up reception data are stored;
Judge whether the saturated pre-warning mark of built-in RAM buffer area is saturated, and carry out data processing;
To GPRS DTU, send row wave datum.
2. the capable wave datum acquisition method of a kind of transmission line fault locating device according to claim 1, it is characterized in that: the described saturated pre-warning mark in sram cache district that judges shows whether be saturated, by FPGA data processing unit, first judge the saturated pre-warning mark in sram cache district shows whether be saturated, saturated limits value can preset (being made as 90%), if it is saturated that sram cache district does not have, row wave datum is deposited in to SRAM, row wave datum memory buffers district shared mechanism is using SRAM as the first buffer area.
3. the capable wave datum acquisition method of a kind of transmission line fault locating device according to claim 1, it is characterized in that: the described concrete grammar that follow-up reception data are stored is, if saturated pre-warning mark display buffer district, sram cache district is soon saturated, now follow-up reception data are deposited in to FPGA built-in RAM buffer area, row wave datum memory buffers district shared mechanism is using the built-in RAM of FPGA as the second buffer memory.
4. the capable wave datum acquisition method of a kind of transmission line fault locating device according to claim 1, it is characterized in that: whether the described saturated pre-warning mark of built-in RAM buffer area that judges is saturated, and carry out data processing concrete grammar and be, when the saturated pre-warning mark of built-in RAM buffer area represents to be also about to when saturated, according to GPRS DTU buffer area situation, deposit row wave datum in GPRS DTU buffer area, now GPRS DTU buffer memory is as the 3rd buffer area of row wave datum memory buffers district shared mechanism; Whether GPRS DTU buffer area allows to deposit in row wave datum is divided into two kinds of situations, be FPGA according to the online situation of GPRS DTU and whether buffer area saturated judges whether to deposit wave datum to be issued in a DTU buffer memory, the storage of these data meets the second buffer memory and does not send the condition of saturated early warning; Another kind is that the second buffer memory sends saturated early warning and follow-up row wave datum importance of coming up is very high, and this type of high priority data deposits DTU buffer area in, through wireless transmission, is uploaded to data center.
5. the capable wave datum acquisition method of a kind of transmission line fault locating device according to claim 1, it is characterized in that: described to GPRS DTU transmission row wave datum is, central processing unit FPGA according to GPRS DTU whether online and buffer area whether send saturated early warning, judge whether to send row wave datum to GPRS DTU; Steering logic meets the online and buffer area of GPRS DTU simultaneously while not sending saturated early warning, and FPGA just sends data to it.
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| CN106028397A (en) * | 2016-05-10 | 2016-10-12 | 国网新疆电力公司经济技术研究院 | High-reliability mass data wireless transmission system |
| CN106468733A (en) * | 2015-08-17 | 2017-03-01 | 中国电力科学研究院 | A kind of monitoring system of extra-high voltage Lightning Incoming Wave and its monitoring method |
| CN115542087A (en) * | 2022-12-05 | 2022-12-30 | 昆明理工大学 | Multiple lightning stroke recognition method suitable for traveling wave recording integrated equipment |
| CN115616349A (en) * | 2022-11-30 | 2023-01-17 | 昆明理工大学 | Multi-lightning-stroke identification method and system based on multi-metadata fusion |
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Address after: 570203 No. 34, Fu Hai Road, Haikou, Hainan Applicant after: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Applicant after: Wuhan three phase electric power Co., Ltd. Address before: 570203 No. 34, Fu Hai Road, Haikou, Hainan Applicant before: Hainan Power Technology Research Institute Applicant before: Wuhan Sunshine Power Science & Technology Co., Ltd. |
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Inventor after: Wu Qing Inventor after: Hu Bin Inventor after: Huang Song Inventor after: Chen Qinzhu Inventor after: Wang Sijie Inventor after: Yu Yang Inventor before: Wu Qing Inventor before: Hu Bin Inventor before: Huang Song Inventor before: Chen Qinzhu Inventor before: Wang Sijie Inventor before: Yu Yang Inventor before: Qian Guanjun Inventor before: Yu Ganghua Inventor before: Xu Chunying |
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Effective date of registration: 20171226 Address after: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Applicant after: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Address before: 570203 No. 34, Fu Hai Road, Haikou, Hainan Applicant before: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Applicant before: Wuhan three phase electric power Co., Ltd. |
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