抄録
To design a reliable and cost-effective lightning-proof mechanism in a power system, various factors must be totally considered. One of the factors is the lightning intensity in the region where the power system is constructed. It is extremely important to know the lightning intensity. From the point of view, we have measured the frequency of lightning discharges in the kanto district in Japan using lightning flash counters to collect and analyze lightning discharges data. The result has contributed to make the frequency distribution map of the lightning discharges in Japan. However, there lies a lot of problem now to be resolved in the measurement. In this report, we focuses on the problems to find out the ways to solve them.
