Evaluation of lightning accommodation systems for wind-driven turbine rotors

Technical Report · Mon Mar 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/5348383· OSTI ID:5348383

Bankaitis, H

Several concepts of lightning accommodation systems for wind-driven turbine rotor blades were evaluated by submitting them to simulated lightning tests. Test samples representative of epoxy-fiberglass and wood-epoxy composite structural materials were submitted to a series of high-voltage and high-current damage tests. The high-voltage tests were designed to determine the strike points and current paths through the sample and the need for, and the most proper type of, lightning accommodation. The high-current damage tests were designed to determine the capability of the potential lightning accommodation system to sustain the 200-kA lightning current without causing damage to the composite structure. The observations and data obtained in the series of tests of lightning accommodation systems clearly led to the conclusions that composite-structural-material rotor blades require a lightning accommodation system; that the concepts tested prevent internal streamering; and that keeping discharge currents on the blade surface precludes structure penetration. Induced voltage effects or any secondary effects on the integral components of the total system could not be addressed. Further studies should be carried out to encompass effects on the total system design.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• DOE Contract Number: AI01-76ET20320
• OSTI ID: 5348383
• Report Number(s): DOE/NASA/20320-37; NASA-TM-82784; ON: DE82015098
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
DESIGN
ELECTRIC DISCHARGES
ELECTRICAL EQUIPMENT
EPOXIDES
EQUIPMENT
FIBERGLASS
LIGHTNING
LIGHTNING ARRESTERS
MACHINERY
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ROTORS
TEST FACILITIES
TESTING
TURBINE BLADES
TURBINES
TURBOMACHINERY
WIND TURBINES