Fuzzy Controller Design using Soft Switching Boost Converter for MPPT in Hybrid System
1T.Balamurugan, Department of EEE, Research Scholar, Karpagam University, Coimbatore, India.
2Dr.S.Manoharan, Department of EIE, Karpagam college of Engineering Coimbatore, India.
Manuscript received on November 01, 2012. | Revised Manuscript received on November 02, 2012. | Manuscript published on November 05, 2012. | PP: 87-94 | Volume-2 Issue-5, November 2012. | Retrieval Number: E0974092512/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this paper, a fuzzy logic control (FLC) is Proposed to control the maximum power point tracking (MPPT) for a photovoltaic (PV) system and to control the maximum power point for a wind turbine (WT) system. Hybrid integrated topology, fed by photovoltaic (PV) and wind turbine (WT) sources and suitable for distributed generation applications, is proposed. It works as an uninterruptible power source that is able to feed a certain minimum amount of power into the grid under all conditions. PV is used as the primary source of power operating near maximum power point (MPP), with the WT section (block), acting as a current source, feeding only the deficit power. The unique “integrated” approach obviates the need for dedicated communication between the two sources for coordination and eliminates the use of a separate, conventional dc/dc boost converter stage required for PV power processing. The conventional boost converter decreases the efficiency because of hard switching, which generates losses when the switches are turned on/off. During this interval, all switches in the adopted circuit perform zero-current switching by the resonant inductor at turn-on, and zero-voltage switching by the resonant capacitor at turn-off. This switching pattern can reduce the switching losses, voltage and current stress of the switching device. The Hybrid systems have been simulated in MATLAB Simulink software and their Control Schemes have been analyzed and validated.
Keywords: Photovoltaic (PV) systems, Wind Turbine (WT), Fuzzy Logic Controller, Boost Converter, single phase inverter, Triggering Pulses, Perturb and Observe (P&O).