PROJECT TITLE :

Simulation Framework for DC Grid Control and ACDC Interaction Studies Based on Modular Multilevel Converters

ABSTRACT:

Modular multilevel converter (MMC) topology is discussed intensively as a vital part of future dc grids, particularly to integrate offshore wind power. Whereas generalized voltage-source converter models are sometimes utilised for multiterminal investigations, conclusions on transient dc grid behavior and on ac-dc interactions throughout distorted ac grid conditions are laborious to draw or are limited in their significance. During this paper, a MMC-based mostly dc grid framework with a tripartite target an inside converter furthermore dc and ac grid management is presented. Besides, an evaluation of the implemented MMC model that includes the obtainable arm sum voltage, a decoupled ac and dc current system control concept that is suitable to handle unbalanced voltage conditions comes for HVDC applications. Combined with wind farm arrays, this collocation permits a meaningful examination of hybrid ACDC structures and the implemented dc grid management methodologies. To supply proof of the universal applicability of this framework, simulations are allotted on a five-terminal system.