FFC-TBC系統連系での蓄電池による連系線潮流変動抑制に関する基礎検討

摘要

近年，地球温暖化対策として二酸化炭素排出量の削減がrn求められており，化石燃料代替エネルギーである太陽光エrnネルギーや風力エネルギーなどの再生可能エネルギーが注rn目されている。中でも風力発電については，補助金制度やrn電力会社による電力購入時の優遇制度により，導入量が急rn速に増加している。しかしながら，風力エネルギーは風速rnの3乗に比例し，気象条件によってその出力が大きく左右rnされるために，電力系統へ連系する風力発電設備の容量がrn増加するにつれて，電圧や周波数などの電力品質の維持にrn支障をきたす恐れが大きくなる。%In recent years, a lot of distributed generations such as photovoltaic and wind power generations are going to be installed in power systems. However, the fluctuation of these generator outputs affects the system frequency. Therefore, introduction of battery system to the power system has been considered in order to level the fluctuation of the total power output of the distributed generations. This research aims at suppressing the system frequency fluctuation and the tie line power flow deviation due to short-period fluctuation of wind power output within a certain range by cooperative control of LFC generators and battery system. It is assumed that a TBC based small control area with a large penetration of wind power plants is interconnected into a FFC based large control area. In this paper, the fluctuations of the system frequency and the tie line power flow are analyzed and LFC signal dispatching methods for effective control of the LFC generators and the battery system are proposed. Then, the required battery capacity for suppressing the tie line power deviation within a given level is evaluated.