Numerical and Experimental Investigation of Grounding Electrode Impulse-Current Dispersal Regularity Considering the Transient Ionization Phenomenon

2011 ◽  
Vol 26 (4) ◽  
pp. 2647-2658 ◽  
Author(s):  
Jingli Li ◽  
Tao Yuan ◽  
Qing Yang ◽  
Wenxia Sima ◽  
Caixin Sun ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Grounding Electrode ◽  
Impulse Current

Observation and analysis of the sparkover around grounding electrode under impulse current

2017 ◽  
Vol 11 (8) ◽  
pp. 1997-2002 ◽  
Author(s):  
Hailiang Lu ◽  
Zhiqiang Feng ◽  
Xuefang Tong ◽  
Wenguang Chen ◽  
Bo Tan ◽  
...  
Keyword(s):  
Grounding Electrode ◽  
Impulse Current

scholarly journals Circuit-based grounding electrode considering frequency dependence for different input current

2020 ◽  
Vol 20 (2) ◽  
pp. 613
Author(s):  
Ruqayyah Othman ◽  
Zulkurnain Abdul-Malek
Keyword(s):  
Frequency Dependence ◽  
Input Current ◽  
Soil Parameters ◽  
Voltage Response ◽  
Current Response ◽  
Frequency Dependent ◽  
Dependent Model ◽  
Grounding Electrode ◽  
Frequency Dependent Model ◽  
Impulse Current

<p>This paper presents a simulation work of circuit-based grounding electrode considering frequency dependence of soil parameters for three input currents which are impulse, AC 50 Hz, and DC. The circuit parameters were determined by using Dwight and Sunde equations where a single horizontal grounding electrode was considered. Scott model was used for the frequency dependent model, to determine the frequency dependent soil resistivity and relative permittivity. It is found that the voltage response of the impulse current was highly affected (75.2%) by the frequency compared to the voltage response of AC 50 Hz and DC. The impulse current response also gave the lowest peak in the analysis by the influence of frequency which make it better compared to the two other inputs. Therefore, it can be concluded that the frequency dependent of soil parameters is crucial and need to be considered in the transient analysis for any kind of input current to obtain accurate results.</p>

Do moods and expectancies have unique or interactive effects?: An experimental investigation

2014 ◽  
Author(s):  
Shane Close ◽  
Victoria Adkins ◽  
Kandice Perry ◽  
Katheryn Eckles ◽  
Jill Brown ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Interactive Effects
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