Real-time and non-real-time EMT simulation of an alternate arm converter

Abstract

This thesis investigates mechanisms for energy balancing in an alternate arm converter (AAC) using detailed real-time and non-real-time electromagnetic transient (EMT) models. A method for regulating submodule capacitor voltages and maintaining energy balance between the ac and dc systems is developed and fully analyzed using detailed EMT simulations. Detailed simulations verify the effectiveness of the submodule capacitor voltage regulation method under normal operating conditions and in response to faults on the dc and ac systems.