A new silver ferrite, &AgFeO2, which is hexagonal with the space group P63/mmc and the lattice dimensions, a= 3"039 and c= 12.395 A, Z--2, was synthesized hydrothermally. The structure has been determined by the heavy-atom method and refined by the block-diagonal least-squares approximation to a final R value of 0.063. The hexagonal cell consists of two double layers of oxygen atoms with two layers of silver atoms interleaved with the double layers. The basal plane containing the silver atom is a mirror plane of the structure. Silver atoms are linearly coordinated by oxygen atoms with Ag

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Recent years, installation of Photovoltaic (PV) system to power system is active by the environmental problem, feed in tariff system and decrement of initial investment cost. Now, the distribution system is already controlled by the existing voltage controller. However, voltage deviation is caused by high penetration of PV. In order to reduce the effect of PV power fluctuation, the Static Var Compensator (SVC) is planning to install in distribution system. SVC offers a high-speed voltage control. But there is a possibility SVC cannot operate effectively by the difference of a working speed between SVC and existing voltage controllers. So the installation of effectively SVC is required to operate cooperatively with existing voltage controllers. In this research, the automatic voltage control technique of the distribution system by SVC which used the moving average control is proposed. Since the setting value of SVC is updated by the moving average, compared with the conventional SVC control technique, an effective and efficient voltage control is given by the proposed the automatic voltage control technique of SVC.