DC bus regulation of modular converter by a cascaded controller

Ground connection is one of the important areas in the power circuit. Based on the previous studies, there are three scenarios for ground connection between two inputs and outputs. This article investigates the ground connection of the circuit with a modular converter and a cascade controller. The outer loop controller controls the DC bus voltage while the inner loop control ensures that the input currents track their references, and balances the capacitor voltages and calculates the duty cycles. The performance of the system is investigated using Simulation results.