Proportional-integral regulator three-phase PWM inverter

What are the proportional and integral gains of a current controller?

The proportional and integral gains of the current controllers are those presented in Table 2. From top to bottom, both figures display the following variables: active power, grid-side current and grid voltage. As it is observed, a higher PLL natural frequency worsens the stability of the system.

What is a three-phase grid-connected inverter topology?

Abstract: A novel three-phase grid-connected inverter topology with a split dc link and LC filter is proposed. It allows for a full parallel connection of multiple inverters simultaneously on both the ac and dc sides, offering high modularity, redundancy, expandability, and overall system reliability.

What is the impact of a current controller on inverter operation?

Again, the impact of the current controller differs in rectifier and inverter operation. While faster current controllers benefit the stability in inverter operation, they worsen the stability in rectifier mode. 4.3. Weighting Factor b of Current Controllers

Which PLL controller should be used for inverter operation?

The stability study is carried out using a small-signal model validated through PSCAD simulations. The results show that for inverter operations, a slow PLL and fast current controllers yield better performance, whereas for rectifier operation, a fast PLL and slow current controllers are recommended.