FRT capability of 100kHz single phase utility interactive inverter with FPGA based hardware controller

In the near future, many distributed power systems will be connected to the utility line in the local area, the demand of the control accuracy to the utility interactive inverter will also become strict more than the present ability. The utility interactive inverter required FRT capability in the case of utility voltage fluctuation. Deadbeat control and PLL control with quasi dq transformation based on a 1MHz sampling were applied to the utility interactive inverter using FPGA based hardware controller. The FRT characteristics were verified through simulations and experiments. The superior characteristics of the proposed method was verified. The FPGA based hardware controller for the 100kHz career PWM inverter was designed and evaluated with experiments.