負荷切り換えに対応可能な系統連系インバータによる擬似ランダム信号を用いた負荷推定

抄録

The grid connection inverter is built in the PCS (Power Conditioning Subsystem) for the distributed power supply, such as photovoltaic system. Recently, the researches on power flow using PCS have been advanced. In order to adjust the power of PCS, it is necessary that the grid connection inverter of the PCS predicts the load and output fluctuation in customer side. Therefore, this paper investigates a load estimation in the grid connection inverter of the PCS under load shift. The proposed estimation method adds superimposing pseudo white signal in the inverter reference signal. In addition, the pseudo random binary sequence (PRBS) creates the pseudo white signal for load estimation. As a result, the proposed method achieves the load estimation even under load shift.