| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
For analyzing transient voltages generated in an electric power facility such as a photovoltaic power generation system struck by lightning with the finite-difference time-domain (FDTD) method, several models such as a corona-discharge model, an arbitrary-radius thin-wire model, and a high-performance absorbing boundary condition have been proposed, and their validities have been shown. Then, these models have been incorporated in the FDTD-simulation program developed by the author. Mechanisms on how overvoltages are generated have been studied with the FDTD program, and a countermeasure to reduce the lightning-caused overvoltage peaks has been proposed.
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