FPGAによるマルチサンプリングを適用した単相系統連系インバータの電流制御

概要

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In this paper, a new control method is proposed for the utility interactive inverter based on the deadbeat control with the FPGA-based hardware controller to improve the control response of an utility current.Deadbeat control is one method to ensure the output voltage or current matches with the references at the sampling instant; therefore, by adopting this control law to the utility interactive inverter, the response of the system is much improved compared with the conventional PI control. The utility interactive inverter is linked to the commercial source via the interactive inductor, and so the inverter controls the output voltage based on the deadbeat control to regulate the output current through the interactive inductor. As a result, a very fast transient response of the utility current can be achieved.The current control method using voltage deadbeat control and PLL control with quasi dq transformation with multisampling parallel processing method are implemented in the FPGA-based hardware controller for the single phase utility interactive inverter.