Promotion of photovoltaic power generation (PV) is accelerated in the world, however, large voltage fluctuation by massive PVs in distribution system may cause frequently operation of voltage regulation device such as LRT and SVR. Since voltage regulation by LRT and SVR have mechanical tap-change operation, equipment life of LRT and SVR would be shortened by frequently operation. One of the measurements is to utilize batteries in the distribution system, which are owned by system operator or customer, however, since installation cost of batteries is expensive, development of the method to operation batteries effectively is important challenge. This paper proposes novel operation method of batteries for contributing to reduction tap-change operation of LRT and SVR considering distribution system loss. Moreover, this paper reveals the required capacity of batteries to avoid additional installation of SVR by numerical case studies with actual demand and PV profile.
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