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LLSDA: Design and Implementation of Lightning Location Data Analysis and Visualization
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作者 Rong FAN Jingxiao LI Mingyuan LIU 《Meteorological and Environmental Research》 CAS 2023年第5期36-41,44,共7页
Visualizing lightning location data is necessary in analyzing and researching lightning activity patterns.This article uses C#and the cross-platform.NET framework to develop a lightning location data analysis class li... Visualizing lightning location data is necessary in analyzing and researching lightning activity patterns.This article uses C#and the cross-platform.NET framework to develop a lightning location data analysis class library and the data-driven client to help lightning researchers improve work efficiency by avoiding repeated wheel invention.Lightning Location System Data Analyzer(LLSDA)is a suite of software tools that includes a.NET class library for software developers and a desktop application for end users.It supports a wide range of lightning location data formats,such as the University of Washington Global Lightning Location System(WWLLN)and Beijing Huayun Dongfang ADTD Lightning Location System data format,and maintains scalability.The class library can easily read,parse,and analyze lightning location data,and combined with third-party frameworks can realize grid analysis.The desktop application can be combined with MeteoInfo(a GIS open-source project)for secondary development. 展开更多
关键词 lightning location system The World Wide lightning location Network(WWllN) ADTD MeteoInfo Global lightning Detection Network(GLD360) Austrian lightning Detection&Information System(ALDIS) Data-driven development Reusable software library
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Estimation of Lightning-Generated NO_(x) in the Mainland of China Based on Cloud-to-Ground Lightning Location Data 被引量:1
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作者 Qi LI Fengxia GUO +4 位作者 Xiaoyu JU Ze LIU Mingjun GAN Kun ZHANG Binbin CAI 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2023年第1期129-143,共15页
Lightning-generated nitrogen oxides(LNO_(x))have a major influence on the atmosphere and global climate change.Therefore,it is of great importance to obtain a more accurate estimation of LNO_(x).The aim of this study ... Lightning-generated nitrogen oxides(LNO_(x))have a major influence on the atmosphere and global climate change.Therefore,it is of great importance to obtain a more accurate estimation of LNO_(x).The aim of this study is to provide a reference for the accurate estimation of the total LNO_(x) in the mainland of China based on cloud-to-ground lightning(CG)location data from 2014 to 2018.The energy of each CG flash was based on the number of return strokes per CG flash,the peak current of each return stroke,and the assumed CG breakdown voltage.The energy of intracloud lightning(IC)was based on the estimated frequencies of IC and the assumed energy of each IC flash.Combining the energy of lightning and the number of nitric oxide(NO)molecules produced by unit energy(ρno),the total LNO_(x) production in the mainland of China was determined.The LNO_(x) in the mainland of China estimated in this study is in the range(0.157-0.321)×10^(9) kg per year[Tg(N)yr-1],which is on the high end of other scholars’works.Negative cloud-to-ground lightning(NCG)flashes produce the most moles of NO_(x),while positive cloud-to-ground lightning(PCG)flashes produce the least total moles of NO_(x).The breakdown voltage of PCG is greater than that of IC or NCG,while the latter has a greater output of LNO_(x). 展开更多
关键词 cloud-to-ground lightning location lightning peak current lightning breakdown voltage nitrogen oxide(NO_(x))
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Power Network Lightning Accident Quick Inquiry with the Lightning Location System 被引量:4
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作者 NIE Zhiping ZHAO Wenguang ZHANG Ping WEN Yinping CHEN Weijiang 《Geo-Spatial Information Science》 2008年第1期43-48,共6页
At present, lightning is one of the 10 natural disasters, and it is also the top environmental factor of power interruption. It often causes huge losses to the electric system. The Wuhan High Voltage Institute of the ... At present, lightning is one of the 10 natural disasters, and it is also the top environmental factor of power interruption. It often causes huge losses to the electric system. The Wuhan High Voltage Institute of the State Grid Corporation of China and Huazhong University of Science and Technology have been researching and developing lightning location systems (LLSs) since the late 1980s. In the mid-1990s, a lightning detection network was created in 29 provinces and cities in China. It is primarily applied to rapidly find lightning accidents, which greatly reduces power interruption. Also, it ensures high efficiency and safe operation of the electricity system. Remarkable benefit is achieved. China's LLS went through an "orientation positioning - time difference positioning - integrated positioning" development process. The positioning precision, detection efficiency, degree of automation, practicability and applied range are improved. Also, a lightning information system plan of the national network has been implemented, which services the whole society. 展开更多
关键词 lightning location power network lightning accident accident inquiry lightning information system
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Lightning Nowcasting with an Algorithm of Thunderstorm Tracking Based on Lightning Location Data over the Beijing Area 被引量:2
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作者 Abhay SRIVASTAVA Dongxia LIU +6 位作者 Chen XU Shanfeng YUAN Dongfang WANG Ogunsua BABALOLA Zhuling SUN Zhixiong CHEN Hongbo ZHANG 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2022年第1期178-188,共11页
A thunderstorm tracking algorithm is proposed to nowcast the possibility of lightning activity over an area of concern by using the total lightning data and neighborhood technique.The lightning radiation sources obser... A thunderstorm tracking algorithm is proposed to nowcast the possibility of lightning activity over an area of concern by using the total lightning data and neighborhood technique.The lightning radiation sources observed from the Beijing Lightning Network(BLNET)were used to obtain information about the thunderstorm cells,which are significantly valuable in real-time.The boundaries of thunderstorm cells were obtained through the neighborhood technique.After smoothing,these boundaries were used to track the movement of thunderstorms and then extrapolated to nowcast the lightning approaching in an area of concern.The algorithm can deliver creditable results prior to a thunderstorm arriving at the area of concern,with accuracies of 63%,80%,and 91%for lead times of 30,15,and 5 minutes,respectively.The real-time observations of total lightning appear to be significant for thunderstorm tracking and lightning nowcasting,as total lightning tracking could help to fill the observational gaps in radar reflectivity due to the attenuation by hills or other obstacles.The lightning data used in the algorithm performs well in tracking the active thunderstorm cells associated with lightning activities. 展开更多
关键词 neighborhood technique lightning nowcasting thunderstorm tracking lightning location data
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Application of Data from a Lightning Location System in Huai'an Region
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作者 Zhang Dehong Wang Su +1 位作者 Tang Yu Wang Shanqi 《Meteorological and Environmental Research》 CAS 2016年第4期1-4,共4页
Based on data of cloud-to-ground lightning detected by a lightning location system in Jiangsu Province from 2007 to 2012and data of thunderstorm days from seven meteorological observation stations in Huai'an durin... Based on data of cloud-to-ground lightning detected by a lightning location system in Jiangsu Province from 2007 to 2012and data of thunderstorm days from seven meteorological observation stations in Huai'an during 1961-2012,the spatial and temporal distribution characteristics of cloud-to-ground lightning in Huai'an were analyzed.The results show that the total frequency of cloud-to-ground lightning in one day was closely related to the intensity and frequency of thunder and lightning.The seasonal variations in the total frequency of cloud-to-ground lightning in Huai'an.The total frequency was shown in unimodal distribution,and the extreme values always appeared in July or August.Most cloud-to-ground lightning was negative,and its frequency accounted for about95.3% of the total frequency.Cloud-to-ground lightning density was high in the south of Huai'an and low in the north,and the serious and very serious ground flash zones concentrated in the south of Hongze County,and most parts of Xuyi and Jinhu County,so lightning protection should be an important task particularly in these regions. 展开更多
关键词 lightning location systems THUNDERSTORM DAYS Distribution of lightning density Time-weighted AVERAGE method China
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Revision of CG Flash Density Based on Lightning Location Data
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作者 Peng Guoping 《Meteorological and Environmental Research》 CAS 2019年第2期69-72,77,共5页
Using the data of the Lightning Location System( LLS) over Hubei Province,through the analysis of the distribution characteristics of CG( Cloud-to-Ground) flash density in 2015,it was found that the layout of the dete... Using the data of the Lightning Location System( LLS) over Hubei Province,through the analysis of the distribution characteristics of CG( Cloud-to-Ground) flash density in 2015,it was found that the layout of the detection station had influence on the spatial distribution of lightning.Grid CG flash density data were used to characterize the spatial distribution of the CG flash,and station distance factor was used to characterize the detection station layout. The result showed that there existed negative correlation between density and factor,significant correlation between the density component and the factor for the lightning current amplitude of 5 to 30 kA,and insignificant correlation between >30 kA of density component and factor. So it is necessary to revise the density to eliminate the influence of the station layout. On the basis of the linear regression method and its residual theory,the revision model of the grid CG flash density and the statistical model of relative detection efficiency were established. The result consistency of segment and non-segmented revision of the density was verified. Through the contrastive analysis of theoretical detection efficiency and relative detection efficiency,the feasibility for revision method of CG flash density and the statistical method of relative detection efficiency was also verified. 展开更多
关键词 lightning location system LATITUDE and LONGITUDE grid REVISION of CG flash DENSITY Detection efficiency Regression analysis Residual theory
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Error Correction of Lightning Location Data
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作者 Jian Luan Xing Wang +2 位作者 Peng Wang Yang Nie Di Wang 《Meteorological and Environmental Research》 CAS 2013年第10期1-5,8,共6页
[ Objective] The study aimed to correct error of lightning location data with small amplitude. [ Method] Using the curve fitting toolbox of matlab mathematical software, the distribution of lightning location data in ... [ Objective] The study aimed to correct error of lightning location data with small amplitude. [ Method] Using the curve fitting toolbox of matlab mathematical software, the distribution of lightning location data in Chongqing during 1999 -2008 was fitted based on logarithmic normal distribution function, and the specific characters of lightning data with current amplitude from -10 to 10 kA were analyzed. [ Result] During 1999 - 2008, the frequency of lightning with current amplitude from -10 to 10 kA in Chongqing City accounted for 4.93% of total frequency, while the fre- quency of lightning with current amplitude from -5 to 5 kA accounted for only 1.27%, lower than 2%, according with the conventional deletion proportion in China. Lightning data with current amplitude from -5 to 5 kA caused a great disturbance to the fitting effect, so the fitting effect was the best after these lightning data was deleted. After the lightning location system of Chongqing City was upgraded in 2005, the frequency of lightning with current amplitude from -10 to 10 kA decreased, and there were obvious changes in the frequency of lightning with current amplitude from -10 to -5 kA and from 5 to 10 kA, while the frequency of lightning with current amplitude from -5 to 5 kA was small and stable, so these data could be deleted. [Conclusion] The research could provide theoretical references for error correction of lightning location data with small amplitude in Chongqing City. 展开更多
关键词 lightning location system Small amplitude Logarithmic normal distribution Error correction China
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Design and Implementation of Lightning Analysis Software Based on Lightning Location System Data
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作者 Rong FAN Chunlong ZHANG +1 位作者 Wen'an XIAO Yaoling ZHI 《Meteorological and Environmental Research》 CAS 2020年第1期21-23,共3页
This paper discusses the steps about how to design and implement software based on lightning location system data and its localization map.The system contains four major modules such as real-time lightning monitoring,... This paper discusses the steps about how to design and implement software based on lightning location system data and its localization map.The system contains four major modules such as real-time lightning monitoring,historical query,lightning intensity zoning,lightning disaster statistics,etc.The system is able to automatically generate real-time lightning monitoring image,lightning animation,and lightning intensity zoning image,which contributes to the high accuracy of the calculation results and the efficiency of data analysis.The paper also points out the deficiencies of software life cycle management and proposes actionable solutions. 展开更多
关键词 lightning location SYSTEM data(llsD) SYSTEM DESIGN UML OBJECT-ORIENTED design(OOD) Systems development life cycle(SDLC)
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Development of a low-frequency magnetic lightning mapping system(LFM-LMS)in North China:validation and preliminary results
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作者 Xiao Li GaoPeng Lu +3 位作者 FanChao Lyu HongBo Zhang Kainat Qamar RuBin Jiang 《Earth and Planetary Physics》 CAS CSCD 2023年第4期460-470,共11页
A low-frequency magnetic lightning mapping system(LFM-LMS)was built during the SHAndong Triggered Lightning Experiment(SHATLE),based on continuous measurements of magnetic field radiation from lightning.The hardware a... A low-frequency magnetic lightning mapping system(LFM-LMS)was built during the SHAndong Triggered Lightning Experiment(SHATLE),based on continuous measurements of magnetic field radiation from lightning.The hardware and source-mapping techniques used by the LFM-LMS were introduced;both Monte Carlo simulations and the observation of rocket-triggered lightning examples were employed to examine the location accuracy and detection effectiveness of the LFM-LMS.We estimated that the system’s location accuracy about 100−200 m horizontally and~200 m vertically.A natural intra-cloud lightning flash and a rocket-triggered lightning flash,both with intricate structures and discharging processes,were examined using the three-dimensional mapping results.The progressing path of negative lightning leaders is usually well-defined,and its propagation speed is estimated to be(0.5−1.4)×10^(6)m/s.In summary,the LFM-LMS can reconstruct the three-dimensional morphology of lightning flashes;this technology provides a efficient method for investigating the characteristics of lightning development,as well as the overall electrical strucuture of thunderstorms. 展开更多
关键词 rocket-triggered lightning low-frequency magnetic field lightning mapping observation location accuracy
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Temporal and Spatial Distribution of Lightning Activity in Ulanqab City
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作者 Qiang MA 《Meteorological and Environmental Research》 CAS 2023年第1期60-62,共3页
From January 2020 to December 2021,Ulanqab Meteorological Bureau of Inner Mongolia used VLF/LF lightning locator to carry out three-dimensional lightning monitoring in Ulanqab City,and compared with ADTD lightning loc... From January 2020 to December 2021,Ulanqab Meteorological Bureau of Inner Mongolia used VLF/LF lightning locator to carry out three-dimensional lightning monitoring in Ulanqab City,and compared with ADTD lightning location data in the same period.The results show that both VLF/LF lightning locator and ADTD lightning locator had excellent monitoring ability for lightning during flood season in Ulanqab.VLF/LF lightning locator was slightly superior to ADTD lightning locator in observation accuracy,the observation ability of low-current cloud-to-ground lightning,intracloud lightning observation and so on.There were obvious temporal and spatial characteristics of cloud-to-ground lightning during flood season in Ulanqab,and there was a certain correlation between the areas where lightning appeared frequently and surface water.Intracloud lightning was mainly concentrated at a height of 1-7 km.Negative cloud-to-ground lightning accounted for about 75%of total cloud-to-ground lightning,and negative intracloud lightning accounted for 39%of total intracloud lightning. 展开更多
关键词 lightning location Cloud-to-ground lightning Intracloud lightning Temporal and spatial distribution
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Characteristics of Cloud-to-ground Lightning during a Squall Line Process outside of the Subtropical High
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作者 Zou Qin Xie Yiran +2 位作者 Xu Yingjie Liu Xuetao Zhang Tengfei 《Meteorological and Environmental Research》 CAS 2017年第5期25-29,36,共6页
Based on the monitoring data of cloud-to-ground( CG) lightning positioning network and Doppler weather radar as well as MICAPS1°× 1° objective analysis field,a squall line process outside of the subtrop... Based on the monitoring data of cloud-to-ground( CG) lightning positioning network and Doppler weather radar as well as MICAPS1°× 1° objective analysis field,a squall line process outside of the subtropical high in low-latitude plateau on May 7,2010 was analyzed. The results showed that wind direction shear between low and high levels and low-level convergence zones provided favorable circulation background for the strong thunderstorm process,while high energy and high humidity,strong thermal instability and ascending motion at low and middle levels offered beneficial environmental conditions for the formation of the thunderstorm. 9 620 return strokes of cloud-to-ground lightning were monitored by the lightning positioning network,and cloud-to-ground lightning was distributed like bands between 584 and 586 hP a. The occurrence of cloud-to-ground lightning was mainly related to echo top and echo intensity at-10 ℃ stratification height,and it mainly appeared in zones where echo top height was larger than 13 km and echo intensity at-10 ℃ stratification height was 35-40 dB Z. Wind convergence and maintaining of high radial velocity were favorable for the development of convective echoes and occurrence of cloud-to-ground lightning. 展开更多
关键词 Squall line: lightning location system DOPPLER WEATHER radar Cloud-to-ground (CG) lightning
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Study on the Scope of Small Amplitude of Cloud-to-ground Lightning in Lightning Weather Monitoring
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作者 Luan Jian Wang Xing +3 位作者 Wang Peng Nie Yang Wang Yue Tan Wei 《Meteorological and Environmental Research》 CAS 2014年第3期7-10,15,共5页
Based on lightning location data in Chongqing region during 1999-2008,the frequency of lightning in various amplitude ranges and its annual variations were analyzed firstly.Afterwards,with the aid of matlab mathematic... Based on lightning location data in Chongqing region during 1999-2008,the frequency of lightning in various amplitude ranges and its annual variations were analyzed firstly.Afterwards,with the aid of matlab mathematical software,the distribution of the lightning location data was fitted using logarithmic normal distribution function.The results showed that after data of cloud-to-ground lightning with current amplitude from-5 to5 kA were deleted from lightning location data,the statistical characteristics of cloud-to-ground lightning could be reflected well.Meanwhile,lightning with current amplitude from-5 to 5 kA accounted for 1.05%(less than 2%),which accorded with the detection principle of lightning position indicator(there existed error detection).Therefore,cloud-to-ground lightning with current amplitude of-5-5 kA in lightning location data of Chongqing region was defined as small amplitude of cloud-to-ground lightning,which could provide scientific references for the processing of lightning location data in Chongqing region as well as analysis and quality control of lightning location data in other regions. 展开更多
关键词 lightning location system Quality control Small amplitude Cloud-to-ground lightning Logarithmic normal distribution China
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基于LLS的雷电流波头陡度时间和概率分布特征 被引量:6
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作者 王学良 张科杰 +1 位作者 余田野 汪姿荷 《实验室研究与探索》 CAS 北大核心 2016年第2期114-118,共5页
为研究雷电流波头陡度分布特征,以满足雷电防护工程设计、雷击事故分析等雷电灾害防御工作需要,根据湖北省2007-2013年雷电定位系统(Lightning Location System,LLS)监测的雷电流波头陡度资料,采用数理统计方法,对雷电流波头陡度的年... 为研究雷电流波头陡度分布特征,以满足雷电防护工程设计、雷击事故分析等雷电灾害防御工作需要,根据湖北省2007-2013年雷电定位系统(Lightning Location System,LLS)监测的雷电流波头陡度资料,采用数理统计方法,对雷电流波头陡度的年、季、月、日变化及累积概率和概率密度分布进行了统计分析。结果表明,正闪、负闪和总闪电的年平均陡度分别为12.0、11.0和11.1 k A/μs;雷电流波头陡度夏季最大,冬季最小,秋季比春季大。1年中,正闪和负闪电波头陡度最大值分别出现在7月和6月,最小值均出现在12月。日中,正闪电陡度最小值与负闪电陡度最大值均出现在6-8时,正闪电陡度最大值和负闪电陡度最小值分别出现在23-0时和13-14时。95%的正闪和负闪电的波头陡度分别不大于31.4和21.1 k A/μs,正闪与负闪电波头陡度累积概率差异明显,负闪电波头陡度累积概率分布比正闪电更集中。雷电流波头陡度主要分布在2-20 k A/μs,正闪和负闪电陡度概率密度最大值出现在8 k A/μs左右。采用最小二乘法进行回归拟合,正闪、负闪和总闪电波头陡度累积概率实测曲线与拟合曲线基本一致,相关系数均在0.999 5以上。 展开更多
关键词 雷电定位系统 雷电流波形 波头陡度 分布特征
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基于LLS的雷电流波头时间分布特征 被引量:7
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作者 王学良 张科杰 +1 位作者 余田野 汪姿荷 《气象科技》 北大核心 2016年第2期313-318,共6页
利用湖北省2007—2013年雷电定位系统(Lightning Location System,LLS)监测的雷电流相关参数资料,采用数理统计方法,对雷电流波头时间的年、季、月、日变化以及累积概率和概率密度分布进行了统计分析。结果表明,正闪电平均波头时间为... 利用湖北省2007—2013年雷电定位系统(Lightning Location System,LLS)监测的雷电流相关参数资料,采用数理统计方法,对雷电流波头时间的年、季、月、日变化以及累积概率和概率密度分布进行了统计分析。结果表明,正闪电平均波头时间为4.8μs,负闪和总闪电为3.6μs;一年中,正闪电7月波头时间最短,月变化特征大致呈"V"形;负闪和总闪电5—7月波头时间比其他月份短,月变化特征大致呈"U"形。正闪电波头时间季节、日变化明显,负闪和总闪电季节、日变化不明显。波头时间小于等于10μs时,正闪、负闪和总闪电的波头时间累积概率分别为95.5%、99.7%和99.6%,总闪电95%的波头时间大于1.5μs,50%的大于3.1μs,5%的大于6.0μs。波头时间在2-3μs时,正闪、负闪和总闪电的概率密度最大。气温较低月份,波头时间相对较长,反之,波头时间相对较短,其原因可能与雷电流幅值大小有关,具体原因有待进一步研究。 展开更多
关键词 雷电定位系统 雷电流波形 波头时间
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基于LLS的清远地区雷电活动特征 被引量:4
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作者 李阳斌 刘三梅 +1 位作者 李翠华 陈绍东 《广东气象》 2015年第4期19-21,26,共4页
利用1999--2013年清远气象观测站资料、闪电定位系统(LLS)地闪数据,采用相关分析、线性趋势等多种统计方法,分析清远地区的雷电活动特征。分析表明:近15年清远地区地闪以负地闪为主;地闪数年际变化呈线性增加趋势;地闪月分布集... 利用1999--2013年清远气象观测站资料、闪电定位系统(LLS)地闪数据,采用相关分析、线性趋势等多种统计方法,分析清远地区的雷电活动特征。分析表明:近15年清远地区地闪以负地闪为主;地闪数年际变化呈线性增加趋势;地闪月分布集中出现在4—9月份,占地闪总数的96.98%;地闪时分布总体呈单峰特征,一天中地闪频数峰值出现在15:00—17:00,占全天地闪频数的34.13%;年平均地闪密度13.52次·km-2·年-1,呈东南至西北递减;地闪电流集中在10~40kA之间,占地闪总数72.01%。地闪数与雷暴日数之间正相关特征显著。 展开更多
关键词 大气现象 闪电定位系统 地闪 雷暴日数 清远地区
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Statistics and Analysis of Lightning Flashovers of Transmission Lines During 2000-2007 被引量:4
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作者 LI Xiao-lan CHEN Jia-hong GU Shan-qiang TONG Xue-fang 《高电压技术》 EI CAS CSCD 北大核心 2009年第3期705-710,共6页
关键词 输电线路 雷击事故 预防措施 供电系统
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基于地闪回击与LLS的OPGW雷击定位精度分析
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作者 郭景武 王博文 +3 位作者 张珣 刘姜 罗洋 刘继承 《中国测试》 CAS 北大核心 2020年第S01期164-168,共5页
OPGW雷击监测作为一种较好的输电线路本体雷击监测手段,其雷击定位准确性无法得到现场验证。文章基于OPGW光纤传感雷击监测装置现场实测的雷击数据,通过与雷电定位系统(LLS)结果数据的横比,以及同一雷击多次地闪回击定位结果的纵比,分析... OPGW雷击监测作为一种较好的输电线路本体雷击监测手段,其雷击定位准确性无法得到现场验证。文章基于OPGW光纤传感雷击监测装置现场实测的雷击数据,通过与雷电定位系统(LLS)结果数据的横比,以及同一雷击多次地闪回击定位结果的纵比,分析OPGW雷击定位的精度与稳定性;并验证导数模极大值波头标定算法用于OPGW雷击定位的有效性。统计结果表明:OPGW雷击定位与LLS定位结果误差基本保持在1~2基塔以内,且多次地闪回击定位结果基本一致。说明OPGW雷击定位具有较高的现场应用参考价值。 展开更多
关键词 雷击定位 OPGW 地闪回击 lls 定位精度
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应用脉冲回波的避雷线断线检测系统研究 被引量:1
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作者 王金明 刘磊 +2 位作者 张飞 李忠虎 陈越 《中国测试》 CAS 北大核心 2024年第3期111-115,共5页
为高效率、低成本地检测风力发电机组桨叶避雷线断线位置,设计基于脉冲回波的避雷线断线检测系统。该系统以单端行波法为原理,由信号发生模块,传感器模块,信号采集模块、控制器模块四部分构成。信号发生模块负责产生行波脉冲信号,传感... 为高效率、低成本地检测风力发电机组桨叶避雷线断线位置,设计基于脉冲回波的避雷线断线检测系统。该系统以单端行波法为原理,由信号发生模块,传感器模块,信号采集模块、控制器模块四部分构成。信号发生模块负责产生行波脉冲信号,传感器模块负责采集回波信号,信号采集模块负责将采集到的回波信号处理转化送给控制模块,控制模块负责分析回波信号,判断故障类型和故障点位置。该文对各个模块的电路和性能参数进行设计,搭建整体的检测系统。经实验验证,该系统可以精准的实现断线判断,并获得断线位置,测量误差精确到0.5 m以内。 展开更多
关键词 叶片避雷线 行波法 罗氏线圈 回波 断线位置
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基于归闪的湖北省两套闪电定位系统对比分析
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作者 朱传林 庞文静 孙京 《武汉理工大学学报(信息与管理工程版)》 CAS 2024年第2期335-342,共8页
为研究湖北省两套闪电定位系统,在归闪的基础上研究分析了2015—2020年湖北地区地闪数据,对闪电频次、时空分布、电流强度月分布、雷电流幅值累积概率等主要参数进行了比对分析,研究结果表明:ADTD-2系统在定位正地闪强度存在局部异常值... 为研究湖北省两套闪电定位系统,在归闪的基础上研究分析了2015—2020年湖北地区地闪数据,对闪电频次、时空分布、电流强度月分布、雷电流幅值累积概率等主要参数进行了比对分析,研究结果表明:ADTD-2系统在定位正地闪强度存在局部异常值外,比ADTD-1系统具有更高的探测效率,其中正地闪的探测效率比负地闪提升幅度更高,探测负地闪回击的时间分辨率也比ADTD-1系统高,ADTD-2闪电数据整体优于ADTD-1数据。 展开更多
关键词 两套定位系统 归闪 时空分布 电流强度 累积概率
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雷击故障下的分布式故障监测装置定位精度测试方法
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作者 李炼炼 谷山强 +3 位作者 孟刚 李健 郑雷 冯智慧 《高电压技术》 EI CAS CSCD 北大核心 2024年第9期4110-4119,共10页
分布式故障监测装置广泛应用于输电线路的故障定位领域,而产品质量参差不齐,部分厂家仅通过行波电流或者工频电流的变化进行故障定位,定位精度存在较大问题。为此,该文提出了一种兼顾行波电流和工频电流模态变化的测试方法。首先,开展... 分布式故障监测装置广泛应用于输电线路的故障定位领域,而产品质量参差不齐,部分厂家仅通过行波电流或者工频电流的变化进行故障定位,定位精度存在较大问题。为此,该文提出了一种兼顾行波电流和工频电流模态变化的测试方法。首先,开展了行波电流和工频电流波形的时序逻辑设计,并提出了精度测试的方法。然后,基于仿真和试验方法,对电流探头进行了选型设计。最后,研制了分布式故障监测装置测试系统,并完成了测试精度的影响因素研究。研究结果表明:测试过程中,雷击故障过渡时长小于1个周波,基本实现雷击故障波形时序的复现;电流探头A621和TRCP3000可配合进行测试,基本满足10~1000A行波电流测量的要求;两路雷电流波前时间差范围为1~100μs,实现了故障点位置的随机设定;db1测试精度优于db4,db4小波系数的鲁棒性优于db1,当信噪比大于20dB时,即可满足测试标准的要求。该研究结果可为分布式故障监测装置雷击故障下的定位精度改善提供技术支撑。 展开更多
关键词 分布式故障监测装置 定位精度 雷击故障 小波变换 鲁棒性
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