2011 7th Asia-Pacific International Conference on Lightning最新文献_第10页

Developing of lightning research center in south east part of Poland 波兰东南部雷电研究中心的建设

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6110168

G. Masłowski, J. Bajorek, S. Wyderka

引用次数: 12

Experimental research of the upward leader inception from transmission line 输电线路上引线启动的实验研究

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6111052

R. Zeng, Zhizhao Li, Zhanqing Yu, C. Zhuang

引用次数: 3

An analysis of the initial breakdown pulse for positive cloud-to-ground flashes 云对地正闪的初始击穿脉冲分析

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1541/IEEJPES.132.542

Yang Zhang, Yijun Zhang, Weitao Lu, D. Zheng, Q. Meng

{"title":"An analysis of the initial breakdown pulse for positive cloud-to-ground flashes","authors":"Yang Zhang, Yijun Zhang, Weitao Lu, D. Zheng, Q. Meng","doi":"10.1541/IEEJPES.132.542","DOIUrl":"https://doi.org/10.1541/IEEJPES.132.542","url":null,"abstract":"In order to further understand the initiating mechanism of positive cloud-to-ground (PCG) flashes, the nature and temporal characteristics of the positive breakdown pulse trains are investigated by electric field data in Conghua of Guangdong province. Considering the difference between the initial polarity of initial breakdown pulses and the first return stoke (RS), three types of bipolar pulse trains, including the same polarity, the opposite polarity and the both polarity, are identified. The percentages are 83.5%, 10% and 5.5%, respectively. The statistic results show that PCG flash with breakdown pulse trains, which occur when the amount of PCG flash is little, is about 11.6% of the total PCG flashes. The average time interval between the peak of adjacent pulses and pulse duration are 270.99 μs and 25.01 μs, respectively. The mean value of pulse train duration and the interval between PBP train and RS is 8.88 ms and 98.48ms, respectively. The average ratio of all samples between the maximum amplitude of pulse train and the amplitude of the first stroke pulse is 0.16. The ratio is smaller in of Guangzhou province than in Hokuriku coast in Japan.","PeriodicalId":105667,"journal":{"name":"2011 7th Asia-Pacific International Conference on Lightning","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117091227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Lightning protection of 1000 kV AC power transmission lines and substations 1000kv交流输电线路及变电站的防雷

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6111047

Gu Ding-xie, Dai Min, He Huiwen

{"title":"Lightning protection of 1000 kV AC power transmission lines and substations","authors":"Gu Ding-xie, Dai Min, He Huiwen","doi":"10.1109/APL.2011.6111047","DOIUrl":"https://doi.org/10.1109/APL.2011.6111047","url":null,"abstract":"First of all, in combination with characteristics of the lightning performance of UHV power transmission lines and on the basis of the analysis of experiences and lessons concerning excessively high lightning trip-out rate on 1000 kV transmission lines in Japan and the former Soviet Union, authors of this paper put forward that one of the critical points in the key technical research on 1000kV transmission lines in China should be the reduction of lightning fault rate, and definitely present the prevention of shielding failure flashover as the main orientation in the research on lightning protection. The paper presents that the reduction of ground wire shield angle and distance of the gap with an appropriate length is an important measure for reducing shielding failure trip-out rate of 1000kV transmission lines. Therefore, it is particularly necessary to pay attention to the shielding failure flashover of the lines in mountainous areas with bigger inclination of ground along the lines. In this paper, authors introduce the ground wire shield angles used for UHV transmission lines in plain and mountainous areas in China as well as the operation situation of UHV transmission lines in China in recent two and a half years. Lightning trip-out faults have never occurred up to the present time in China's UHV transmission lines, thus preliminarily showing a good lightning performance. The authors also introduce the method and principle used for calculating lightning inrush overvoltage to UHV substations in China and put forward that the concurrent adoption of measures of both reducing the maximum lightning current of shielding failure at the incoming line section and optimizing the arrangement of lightning arresters to restrict the lightning inrush overvoltage to substations, thus either meeting the demand of restricting overvoltage and reducing the quantity of MOAs used.","PeriodicalId":105667,"journal":{"name":"2011 7th Asia-Pacific International Conference on Lightning","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114175258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

3D Air-termination design-support system 三维空气终端设计支持系统

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6110129

Nobuyuki Morii, H. Kitano, Hidetaka Sato

引用次数: 3

Study on risk of lightning flashover of regional power grid 区域电网雷电闪络危险性研究

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6111081

Chen Xi-yang, Y. Ting, Lin Jianhua, Wang Wei-rang, Liu Yong, L. Gang, Xuan Peizheng, Cheng Haoping

{"title":"Study on risk of lightning flashover of regional power grid","authors":"Chen Xi-yang, Y. Ting, Lin Jianhua, Wang Wei-rang, Liu Yong, L. Gang, Xuan Peizheng, Cheng Haoping","doi":"10.1109/APL.2011.6111081","DOIUrl":"https://doi.org/10.1109/APL.2011.6111081","url":null,"abstract":"The domestic large-scale power blackouts occurs so frequently that more scholars concerned about the cascading outages of power system and the research of fragile domain. Based on the complex network theory and from the perspective of network efficiency, this paper analyzed the inherent fragile domain of power transmission network and had the risk assessment of lightning flashover of the weak field lines through the research of topological properties of the grid and chain dynamic fault simulation. Firstly, based on network topology mode, we proposed two methods based on edge betweenness of cascading outages model and its algorithm, analyzed the static structural properties of network and chain dynamic fault simulation, and qualitatively analyzed the impact of the topological characteristics of the power to the transmission of cascading outages. By calculating the efficiency of network and the loss of value of the network efficiency on failure modes to measure each edge's impact on network performance and then we figured out the fragile domain which influence the performance of the transmission network. Secondly, we analyzed the trip-out rate of specific lines of fragile domain according to the procedures and tried to find out the lines with higher trip-out rate. Finally, we established a lightning flashover risk model of regional power grid to rank the lightning flashover risk of the current grid, in order to provide a theoretical basis to optimize the lightning protection measures of power grid","PeriodicalId":105667,"journal":{"name":"2011 7th Asia-Pacific International Conference on Lightning","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132554912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Noise reduction of lightning electric fields measurements using filtering in the fractional Fourier domain 采用分数阶傅立叶域滤波的雷电电场测量降噪

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6110230

H. Rojas, C. Cortés, F. Santamaria

引用次数: 3

FDTD computation of lightning surges on overhead wires in the presence of corona discharge 电晕放电时架空导线雷电浪涌的时域有限差分计算

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6111079

T. H. Thang, Y. Baba, N. Nagaoka, A. Ametani, J. Takami, S. Okabe, V. Rakov

引用次数: 4

SPD response characteristics in nature lightning 自然雷电中SPD响应特性

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6110225

L. Cai, Jianguo Wang, Shaodong Cheng, Shaojie Yang, Bing Li, Mi Zhou

引用次数: 0

A novel PWM control in the secondary side driven of power supply unit 一种新型的电源二次侧驱动PWM控制方法

2011 7th Asia-Pacific International Conference on Lightning Pub Date : 2011-12-22 DOI: 10.1109/APL.2011.6111064

J. Sheu, Chang-Hsing Chen, Ho-Nien Shou, Chang-Huang Chen

{"title":"A novel PWM control in the secondary side driven of power supply unit","authors":"J. Sheu, Chang-Hsing Chen, Ho-Nien Shou, Chang-Huang Chen","doi":"10.1109/APL.2011.6111064","DOIUrl":"https://doi.org/10.1109/APL.2011.6111064","url":null,"abstract":"This paper investigates a novel varying-frequency isolated drive power supply method using an isolation method to drive a primary side high-voltage circuit of a power supply by a secondary side PWM, while using a varying-frequency method as a control method to enhance effectiveness and efficiency. The control method mainly focuses on the importance of present power management and energy saving, so that it is necessary to reduce the power consumption while the power supply is working or standby. Therefore, this paper proposed and verified some practical methods to reduce the switching loss or other normal rated losses of a switching power supply at a very light load or no load. In addition, the pros and cons of varying-frequency synchronous rectification and other loss reduction technologies are introduced. The new control method disclosed in this paper also takes the voltage resistance level of the surge protection of electronic products into consideration. In general, a power supply is the electronic device having the most impact on surges. For induced voltages or currents produced by indoor indirect contact surges, European Union CE regulation EN 55024 requires all ITE products should pass and certify the EN61000–4–5 surge test, and adjustments of the design and arrangement for integrated circuit protection structure for the power supply are taken if necessary. Therefore, this paper also emphasizes this specification for the test and shows that the installed secondary side can prevent or reduce the influence of surges. In the meantime, the design method provided by this paper completes the experiments on 5V/8A and 12V/13A power supplies with a total output of 196W, and achieves an excellent energy-saving effect in the condition of a reduced switching loss. Besides the lightning prevention is measured such as a lightning rod or grounded BYPASS method.","PeriodicalId":105667,"journal":{"name":"2011 7th Asia-Pacific International Conference on Lightning","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126637691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0