中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627358

Luis Ignacio Colina Jimenez, M. Rock

引用次数: 1

Lightning-Induced Voltage on an Overhead Transmission Line Terminated with Non-veritical Risers 非垂直立管端接架空输电线路的雷击电压

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627332

Jun Guo, M. Rubinstein, V. Cooray, F. Rachidi

引用次数: 1

Impacts of Earthing Arrangement on Lightning Protection Efficiency of Grid Connected PV System 接地布置对并网光伏系统防雷效率的影响

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627347

Z. M. Khurshid, C. Gomes

{"title":"Impacts of Earthing Arrangement on Lightning Protection Efficiency of Grid Connected PV System","authors":"Z. M. Khurshid, C. Gomes","doi":"10.1109/ICLPandSIPDA54065.2021.9627347","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627347","url":null,"abstract":"This paper investigates the potential and current distribution of a grid-connected (PV) system with surge protective devices connected according to the European Commission for Electrotechnical Standardization (CENELEC) under various values of grounding resistance for isolated and integrated AC and DC earthing systems. A 400 kW PV system is implemented using PSCAD/EMTDC software, where the system is connected to a 33 kV grid through a boost transformer. The simulation results were obtained for negative subsequent lightning stroke (50% value), developed by Heidler function. The current was injected separately into both the DC and the AC sides of the PV inverter. The values of resistance of the earthing systems have been varied over a set of combinations. The results show that when the AC and DC sides are separately earthed for non-zero values of resistance, the line potentials reach very high values posing a severe risk of a system to earth arcing. The situation is worse when the lightning strikes the DC side and when the DC side earth resistance has high values. The situation improves significantly when the earthing systems are integrated. It is advisable to achieve an earth resistance below 5 Ω for the integrated earthing system.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81558272","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: 5

Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components 采用天然元件的非隔离防雷系统，直接雷击产生的接触电压和人体电流对人体的威胁

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627465

A. Kern, Anahita Imani Vashiani, Tobias Timmermanns

{"title":"Threat for human beings due to touch voltages and body currents caused by direct lightning strikes in case of non-isolated lightning protection systems using natural components","authors":"A. Kern, Anahita Imani Vashiani, Tobias Timmermanns","doi":"10.1109/ICLPandSIPDA54065.2021.9627465","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627465","url":null,"abstract":"For typical cases of non-isolated lightning protection systems (LPS) the impulse currents are investigated which may flow through a human body directly touching a structural part of the LPS. Based on a basic LPS model with conventional down-conductors especially the cases of external and internal steel columns and metal façades are considered and compared. Numerical simulations of the line quantities voltages and currents in the time domain are performed with an equivalent circuit of the entire LPS. As a result it can be stated that by increasing the number of conventional down-conductors and external steel columns the threat for a human being can indeed be reduced, but not down to an acceptable limit. In case of internal steel columns used as natural down-conductors the threat can be reduced sufficiently, depending on the low-resistive connection of the steel columns to the lightning equipotential bonding or the earth termination system, resp. If a metal façade is used the threat for human beings touching is usually very low, if the façade is sufficiently interconnected and multiply connected to the lightning equipotential bonding or the earth termination system, resp.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82758956","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: 2

A power flow transfer optimization strategy for important transmission channels based on lightning early warning 基于雷电预警的重要输电通道潮流优化策略

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627421

C. Tong, Jun Wang, Jian Xu, Yunfeng Cai, Yang Xu, Xia Hua, S. Liao, Tao Wang

{"title":"A power flow transfer optimization strategy for important transmission channels based on lightning early warning","authors":"C. Tong, Jun Wang, Jian Xu, Yunfeng Cai, Yang Xu, Xia Hua, S. Liao, Tao Wang","doi":"10.1109/ICLPandSIPDA54065.2021.9627421","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627421","url":null,"abstract":"With the substantial increase in global thunderstorm activities, the hazards of thunder and lightning to the security of the power grid are increasingly not to be ignored. Due to the large scale of the power grid, the small probability event that the trip of inter-provincial tie line of the same tower due to lightning strikes may still trigger the accident cascade effect of the power grid, which seriously threatens the power supply reliability of the power grid. This paper proposes an active lightning protection measure based on lightning warning which adjusts the power flow of transmission lines that are threatened by lightning strikes by controlling the output of key power sources. And it is different from the traditional static lightning protection measures such as erecting lightning shield lines. This paper also establishes a power flow transfer optimization model that takes into account system constraints such as generator output. Finally, taking the actual large-scale system of Central China Power Grid as an example, the implementation process of the proposed lightning protection strategy is simulated and analyzed, and the research results have reference value for the lightning protection of important power transmission channels.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90497514","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: 5

Modelling Transient Response of Nonuniform Transmission Lines Due to Nearby Lightning Strikes 邻近雷击下非均匀输电线路瞬态响应建模

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627413

M. Gunawardana, B. Kordi

引用次数: 0

Modeling Lightning Current Distribution in Tower Base of Wind Turbine 风力机塔底雷电电流分布建模

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627352

E. Shulzhenko, Kazuo Yamamoto, M. Rock

{"title":"Modeling Lightning Current Distribution in Tower Base of Wind Turbine","authors":"E. Shulzhenko, Kazuo Yamamoto, M. Rock","doi":"10.1109/ICLPandSIPDA54065.2021.9627352","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627352","url":null,"abstract":"Wind power generation has expanded rapidly worldwide over the past 15 years. Europe's wind farms generated 458 TWh of electricity in 2020 and total wind energy capacity exceeded 220 GW [1] (88% onshore and 12% offshore). This covered about 16% of the electricity demand in Europe (EU27+UK) and 27% in Germany. Therefore, a reliable and safe operation of wind turbines (WT) is becoming evermore crucial. Especially high requirements are set for their lightning protection system, since due to their height and open unshielded locations WTs are assessed as very exposed structures to lightning. Most of the breakdowns and malfunctions of the electrical and control system of WT are caused by a ground potential rise (GPR) due to lightning. To investigate this issue in more details, the field measurements were carried out at the specific WT in Japan and a corresponding numerical model was designed for analyzing of lightning current distribution within the WT and arose dangerous overvoltage for electrical equipment without and with overvoltage protection measures at the tower bottom based on installation of surge arresters (SA) due to different lightning components.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88674928","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

Statistical Analysis of Deaths and Damages Caused by Lightning Strikes in Greece 希腊雷击造成的死亡和损失的统计分析

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627415

K. Koutras, Evgenia Kasfiki, E. Pyrgioti

引用次数: 1

Simulation of High-Frequency Transients in Overhead Lines Including Frequency-Dependent Soil Parameters: a FDTD Approach 含频率相关土壤参数的架空线路高频瞬态仿真:FDTD方法

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627374

R. Alípio, A. D. Conti, F. Rachidi

{"title":"Simulation of High-Frequency Transients in Overhead Lines Including Frequency-Dependent Soil Parameters: a FDTD Approach","authors":"R. Alípio, A. D. Conti, F. Rachidi","doi":"10.1109/ICLPandSIPDA54065.2021.9627374","DOIUrl":"https://doi.org/10.1109/ICLPandSIPDA54065.2021.9627374","url":null,"abstract":"This paper investigates the effect of frequency-dependent soil parameters on the simulation of electromagnetic transients on overhead lines, based on the application of the FDTD method to solve the telegrapher's equations. The ground return impedance is calculated assuming either constant or frequency-dependent soil parameters. Frequency-domain results show differences in the propagation velocity and attenuation constant when assuming either constant or frequency-dependent soil parameters. Time-domain simulations considering a 230-kV line indicate that the consideration of the frequency variation of soil electrical parameters can be relevant to the simulation of high-frequency transients on transmission lines for poorly conducting soils. It is also found that this variation changes not only the amplitude but also the waveform of the resulting transient voltages. The analysis presented indicates that EMT-like tools, which traditionally assume Carson's formulation for the ground return impedance together with constant soil parameters, should be used with caution in lightning transient studies involving overhead lines above high-resistivity soils.","PeriodicalId":70714,"journal":{"name":"中国防雷","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78891414","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

Lightning-induced Voltages on Overhead Distribution Lines Computed through Analytical Expressions for the Electromagnetic Fields 用电磁场解析表达式计算架空配电线路雷击电压

中国防雷 Pub Date : 2021-09-20 DOI: 10.1109/ICLPandSIPDA54065.2021.9627387

M. Brignone, R. Procopio, D. Mestriner, M. Rossi, F. Delfino, F. Rachidi, M. Rubinstein

引用次数: 0

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