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.

Vol 1, No 1 (2016): MLI-DSTATCOM Integrated With Distribution Transformer for Power Quality Enhancement in PDS

Authors: T. Rakesh, Dr. V. Madhusudhan, Dr. M. Sushama

Abstract: This article offers a novel cascaded structure convertor (CMC)-primarily based mostly distribution-kind STATCOM integrated with distribution electrical device for medium voltage utility. The star-related, n-level CMC is connected to the winding faucets on the first windings of the electrical device to reap voltage strain discount and maintain a bendy affiliation voltage degree. Taking complete use of the spare potential of distribution electrical device, a compromise between cascaded cells depends and also the voltage pressure is completed. The CMC-based altogether DSTATCOM is controlled as a controlled current supply to inject compensation current to the first windings through the taps. A modified decoupled fashionable manipulate is planned to control the device. Simulation version and scale-down model area unit developed to verify the performance of the planned integrated structure. Simulation and experimental effects demonstrate the great performance of the planned structure for reactive power compensation.


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