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Vasa, Nilesh J.
- Electrostatic model to understand the influence of salt deposit in gfrp material during lightning discharges
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Authors
Affiliations
1 Department of Electronics Engineering, Madras Institute of Technology, Anna University, Chennai- 600044, IN
2 Department of Engineering Design, Indian Institute of Technology Madras, Chennai- 600036, IN
3 Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai- 600036, IN
1 Department of Electronics Engineering, Madras Institute of Technology, Anna University, Chennai- 600044, IN
2 Department of Engineering Design, Indian Institute of Technology Madras, Chennai- 600036, IN
3 Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai- 600036, IN
Source
Power Research, Vol 13, No 1 (2017), Pagination: 37-46Abstract
A methodical experimentation and mathematical modeling is carried out to study the influence of salt deposit on wind turbine blade material (Glass Fiber Reinforced Plastics/GFRP) during lightning discharges. Electrical discharge measurements combined with optical emission spectroscopy technique and electrostatics is utilized to understand the dynamics of surface discharge and the level of damage on GFRP material. COMSOL simulation studies shows that the electric field intensity on the surface of the polluted GFRP gets enhanced when compared to that of virgin GFRP, irrespective of the applied voltage profile and polarity. Flashover voltage, discharge current and optical emission spectroscopy measurements indicates that the deterioration of GFRP material is severe when there is an adhesion of salt deposit. It is also observed that the damage induced on GFRP material is severe for winter lightning (switching impulse voltage of 250/2500 μs) compared to that of summer lightning (lightning impulse voltage of 1.2/50 μs) due to a longer front and tail period of the pulse.Keywords
Wind blade, pollution measurement, flashover voltage, lightning impulse, switching impulse, temporal and spatial measurements
- Analysis on surface discharge patterns caused by harmonic AC voltages
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Authors
Aravinth Subramaniam
1,
Sanjib Kumar Panda
1,
Mehdi Bagheri
2,
Nilesh J. Vasa
3,
Ramanujam Sarathi
3
Affiliations
1 Dept. of Electrical and Computer Engineering, National University of Singapore, SG
2 Electrical and Computer Engineering Department , Nazarbayev University, Astana, KZ
3 Indian Institute of Technology Madras, IN
1 Dept. of Electrical and Computer Engineering, National University of Singapore, SG
2 Electrical and Computer Engineering Department , Nazarbayev University, Astana, KZ
3 Indian Institute of Technology Madras, IN