Vol 1, No 1 (2016)

DC Current Flow Controller for Multilevel Converter Multiterminal HVDC Grids using Fuzzy logic controllers

Authors: K Rama Krishna, M Ssatish kumar, K Nagarjun, T.Kranthi Kumar 

Abstract: In this paper, the design of a novel DC current flow controller (CFC) and evaluates the control performance of balancing and regulating the DC branch currents using the DC CFC in a meshed multi-terminal HVDC (MTDC) grid along with fuzzy logic controller was proposed. Here we are using fuzzy logic controller instead of using other controllers. The DC CFC consists of two identical full bridge DC-DC converters with the capacitors of the two converters being connected in parallel. The control performance of the DC CFC is tested on a meshed 3- terminal (3-T) HVDC grid, which is based on modular multilevel converters (MMC) using fuzzy logic controller. The DC branch current control in the meshed MTDC grid is achieved using the proposed control strategy of the DC CFC, and is verified through case studies on the real-time digital simulator (RTDS). Simulation was done by using MATLAB/Simulink software.

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