Results 71 to 80 of about 314,581 (221)

Lightning Impulse Current Tests on Conductive Fabrics.

CoRR, 2019
The large amount of electric current associated to lightning discharges is hazardous for living beings, equipment, structures and buildings. To protect those targets against lightning are used Lightning Protection Systems (LPS). However, there are some temporary outdoor activities and backcountry places where an adequate LPS cannot be set up mainly due
Cristancho, Jorge Alejandro, Rivera G., Carlos A., Rodriguez M., Jorge E., Pantoja A., John J., Herrera Q., Liz K., Roman, Francisco   +5 more
openaire   +2 more sources

Mechanism of Quasi‐Power‐Frequency Resonant Overvoltage Triggered by Multiple Lightning Strikes in High‐Voltage Alternating Current Systems Equipped With Shunt Reactor

High Voltage, EarlyView.
ABSTRACT This paper investigates the generation mechanism of quasi‐power‐frequency resonant overvoltage triggered by multiple lightning strikes in high‐voltage alternating current (HVAC) systems equipped with shunt reactors. Based on field measurements from a 500 kV AC system, equivalent and simplified circuit models have been established to analyse ...
Tao Liang, Tao Cui, Zhengxi Wang, Tongwei Guo, Xiaohui Wu, Hong Zeng, Jie Guo, Yanzhao Xie   +7 more
wiley   +1 more source

Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse Stress [PDF]

, 2018
Breakdown Mechanisms of Rod-Plane Air Gaps with a Dielectric Barrier Subject to Lightning Impulse ...
Meyer, Hans Kristian Hygen, Mauseth, Frank, Pedersen, Per Atle, Ekeberg, Jonas   +3 more
core   +1 more source

Impulse ageing of polymeric materials

, 2011
Impulse over-voltage is a common phenomenon in electric power systems. A switching impulse is created by a switching surge or local fault while a lightning impulse is due to direct lightning strike to high voltage plant such as an overhead line.
Dao, Ngoc Long
core   +1 more source

A study on the instantaneous and dynamic characteristics of impulse grounding resistance in grounding grids for artificially triggered lightning

Results in Engineering
The impulse grounding resistance is a critical parameter for evaluating performance of lightning protection devices, and effectively reducing this resistance remains a major challenge in lightning protection or electrical engineering. While most previous
Juan Zhang, Xiaobo Wang, Shaodong Chen, Xiaoying Gan, Zhiyong Luo, Xu Yan, Congquan Wu   +6 more
doaj   +1 more source

Study on the Coupled Effects of High‐Speed Airflow and Charged Sand on Power‐Frequency Discharge Characteristics of Conductor–Tower Gaps in Strong Wind–Sand Environments

High Voltage, EarlyView.
ABSTRACT Strong wind–sand weather in Xinjiang threatens power grid safety by increasing transmission line tripping risks. Existing studies focus on sand polarization but neglect the coupled influence of high‐speed airflow and charged sand on gap discharge characteristics.
Jianghai Geng, Yang Wang, Ping Wang, Yang Lu, Songsong Zhou, Yujian Ding, Xiaojun Zhang, Wenbing Zhuang, Yu Su   +8 more
wiley   +1 more source

Study on the Power‐Frequency Arc Extinction Characteristics of Semi‐Closed Short‐Gap Device

High Voltage, EarlyView.
ABSTRACT Multi‐chamber arc‐extinguishing devices have a simple structure and excellent arc‐extinguishing performance; thus, they have attracted considerable attention as lightning protection devices. However, the structural parameters of different models of the aforementioned devices vary, leading to inconsistent protection levels; therefore, the arc ...
Yeqiang Deng, Caiwei Pan, Jintian Chen, Yu Wang, Lei Lan   +4 more
wiley   +1 more source

The effect of multiple lightning impulse on the electrical characteristic of opto-isolator as lightning protective devices [PDF]

, 2008
The behavior and performance of surge protective devices such as optoisolator under the application of multiple lightning voltage impulse are different from the single lightning voltage impulse test.
Sidik @ Mat Sidek, Ahmad
core  

Laboratory demonstration of lightning strike pattern on different roof tops installed with Franklin Rods

EPJ Web of Conferences, 2017
Protection against lightning is always a challenging job for the researcher. The consequences due to lightning on different building shapes needs a comprehensive knowledge in order to provide the information to the common man.
Ullah Irshad, Baharom MNR, Ahmed H., Luqman HM., Zainal Zainab   +4 more
doaj   +1 more source

Conductivity Analysis and Thermoelectric Behaviour of Larch Standing Trees Under Lightning Currents: Role of Moisture Distribution and Carrier Motion

High Voltage, EarlyView.
ABSTRACT The direct effects of lightning strikes on forest combustibles form the foundation for predicting lightning‐induced forest fires. Accurate assessment of lightning impact is hindered by limited knowledge of the conduction characteristics of standing larch trees.
Jinru Sun, Xiaomeng Liu, Shu Li, Duanzhou Peng, Xueling Yao, Xiaodong Liu   +5 more
wiley   +1 more source