Grid-connected three-phase inverter

What is a three-phase inverter?

This project focuses on designing and simulating a three-phase inverter intended for grid-connected renewable energy systems such as solar PV or wind turbines. The inverter converts DC power from renewable sources into AC power synchronized with the grid, enabling efficient and stable integration of renewable energy into the electrical grid.

How is a three-phase PV Grid-connected inverter designed?

The three-phase PV grid-connected inverter was designed based on the LQR method, where the tracking error was adjusted to zero through integration (Al-Abri et al., 2024). The disturbance rejection ability of the PV GCI was improved by designing the linear state inaccuracy feedback control policy (Zhou et al., 2021).

Can a three-phase inverter synchronize with a conventional AC grid?

Integrating these into the conventional AC grid requires power electronics converters, particularly inverters that produce high-quality AC waveforms synchronized with the grid. This project simulates a three-phase inverter topology widely used in grid-tied renewable applications, focusing on efficiency and power quality.

How to control voltage in a grid-tied inverter system?

This example shows how to control the voltage in a grid-tied inverter system. The Voltage regulator subsystem implements the PI-based control strategy. The three-phase inverter is connected to the grid via a Circuit Breaker. The Circuit Breaker is open at the beginning of the simulation to allow synchronization.