2019 Volume 19 Issue 7 Pages 7_14-7_26
The distributed power resources such as solar power generation connected to electrical distribution network are increasing with the support of the feed-in tariff of renewable energy. They are expected to remedy the electric power interruption caused by the accident of the distribution facilities and the natural disasters. On the other hand, in an event of earthquake disaster, there is a high possibility that the power users are damaged, and the power demand is assumed to be lower than normal demand. Understanding the decline in power demand due to the effects of distributed power resources and users' damage is a necessary issue in making decisions on disaster prevention measures for distribution facilities. In this paper, an evaluation method of the electric power interruption due to an earthquake disaster considering the users' damage and effect of distributed power resources is proposed. In addition, we consider the distribution lines parallel-off due to the voltage fluctuation in the artificial initial response when an earthquake occurs, and statistically estimate the fragility curves for the distribution lines based on observation data in the Kumamoto earthquake (April, 16, 2016, M7.3). The JST-CREST 126 system model is adopted as example of the distribution network and the improvement effect of the electric power interruption by the distributed power resources are discussed for applicability of the proposed method.
