太陽光発電システム大量導入への課題

抄録

A photovoltaic power generation system（PVS）is one of the promising measures to develop a low carbon society. For realizing high penetration of PVS, further cost reduction is necessary, while several other challenges would remain. Following the brief introduction of recent trend of PVS market, this paper reviews two issues, i.e. a long-term reliability of PVS and the impacts of high-penetration PVS on electric power system. A long-term stability of PVS is one of the important issues, because the CO₂ emission from the manufacturing process of PVS is relatively high compared with other generators. This paper introduces the recent activity of PVRessQ!, which suggests that mechanical faults/failures can be detected in PVS used for just several years. As for the impact of high-penetration PVS, the widely dispersed penetration would be essential measure by considering the results of recent studies about so-called smoothing effect due to the time difference in power output patterns. Therefore, this paper discusses possible measures against some negative impact, focusing on measures from social point of view to realize the widely dispersed penetration.