Journal
IEEE SYSTEMS JOURNAL
Volume 15, Issue 2, Pages 1674-1683Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSYST.2020.2998472
Keywords
Voltage control; Topology; Maximum power point trackers; Generators; Reactive power; Control systems; Stators; DC nanogrid; maximum power point tracking (MPPT); self-excited induction generator (SEIG); unified controller; voltage regulation
Categories
Funding
- Science and Engineering Research Board, Department of Science and Technology, Department of Electronics and Communication Engineering, Indian Institute of Information Technology, Design and Manufacturing, Kancheepuram [YSS/2015/001473]
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This article proposes a unified controller for a Cuk converter assisted self-excited induction generator (SEIG) on a direct current nano grid configuration for rural electrification. The control strategy is designed to select operating modes in grid-connected and islanded mode, performing maximum power point tracking (MPPT) and voltage regulation. Harmonic spectrum analysis shows the effectiveness of diode bridge rectifiers over semi-controlled/controlled rectifiers.
This article proposes a unified controller for Cuk converter assisted variable speed wind turbine driven self-excited induction generator (SEIG) in dc nanogrid configuration for rural electrification. Cuk converter assisted SEIG based wind energy conversion system (WECS) is considered as a master source in the proposed nanogrid, which operates in both grid-connected and islanded mode of operation. In grid connected mode, the system operates in maximum power point tracking (MPPT) under varying wind velocity. A single sensor, modified perturb and observe (P&O) MPPT algorithm, which is independent of the generator parameter is developed and implemented through Cuk converter. During a fault, the WECS necessitates to operate in islanded mode with voltage regulation to supply the local loads continuously. The unified control strategy is developed for selecting the mode of operation, which are MPPT and voltage regulation in grid-connected and islanded mode, respectively. Harmonic spectrum analysis is carried to justify the selection of diode bridge rectifier over semicontrolled/controlled rectifier. The effectiveness and feasibility of the proposed system is verified by means of MATLAB/Simulink. To demonstrate the operational capability, a laboratory scaled prototype is fabricated and tested under various dynamic scenarios.
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