Observational and experimental study of the lightning stroke attraction effect with ground wire system constructions

2012 ◽  
Vol 19 (1) ◽  
pp. 363-370 ◽  
Author(s):  
S. Oguchi ◽  
T. Ishii ◽  
S. Okabe ◽  
Y. Sakamoto ◽  
M. Tsuji ◽  
...  
Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 748
Author(s):  
Xiaoyan Bian ◽  
Yao Zhang ◽  
Qibin Zhou ◽  
Ting Cao ◽  
Bengang Wei

Building Integrated Photovoltaic (BIPV) modules are a new type of photovoltaic (PV) modules that are widely used in distributed PV stations on the roof of buildings for power generation. Due to the high installation location, BIPV modules suffer from lightning hazard greatly. In order to evaluate the risk of lightning stroke and consequent damage to BIPV modules, the studies on the lightning attachment characteristics and the lightning energy withstand capability are conducted, respectively, based on numerical and experimental methods in this paper. In the study of lightning attachment characteristics, the numerical simulation results show that it is easier for the charges to concentrate on the upper edge of the BIPV metal frame. Therefore, the electric field strength at the upper edge is enhanced to emit upward leaders and attract the lightning downward leaders. The conclusion is verified through the long-gap discharge experiment in a high voltage lab. From the experimental study of multi-discharge in the lab, it is found that the lightning interception efficiency of the BIPV module is improved by 114% compared with the traditional PV modules. In the study of lightning energy withstand capability, a thermoelectric coupling model is established. With this model, the potential, current and temperature can be calculated in the multi-physical field numerical simulation. The results show that the maximum temperature of the metal frame increases by 16.07 °C when 100 kA lightning current flows through it and does not bring any damage to the PV modules. The numerical results have a good consistency with the experimental study results obtained from the 100 kA impulse current experiment in the lab.


2013 ◽  
Vol 726-731 ◽  
pp. 357-362
Author(s):  
Yu Xiang Zhang ◽  
Xi Lai Zheng

In order to observe the attraction effects of the artificial reef models on Alepocephalus, the behavior and distribution of Alepocephalus in the experimental flume under the presence of five reef models with different shapes and structures were studied using experimental ethology method, and the attraction effects of different reef models were compared. The results indicate that the distribution of Alepocephalus is rather dispersed when no reef model is put into the marked area of the flume, and they prefer to stay in relatively dark area. In this case, the Alepocephalus distribution ratio of the reef marked area is 7%. When reef models are put into the marked area, Alepocephalus shows obvious positive taxis to them. And the Alepocephalus distribution ratio of the reef marked area increased to a level between 16 % and 29 %. In addition, the apertured cubical reef model shows the best attraction effect with a distribution ratio of 29 %.


2020 ◽  
Vol 31 (3) ◽  
pp. 1032-1039
Author(s):  
Bin Yang ◽  
Yong Su ◽  
Nan He ◽  
Bo Zhang ◽  
Xiaosi Zhou ◽  
...  

2021 ◽  
Author(s):  
Xiaoyan Bian ◽  
Yao Zhang ◽  
Qibin Zhou ◽  
Ting Cao ◽  
Bengang Wei

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