ANN CONTROL BASED ENERGY HARVESTING IN FREEDM SYSTEM USING SEPIC CONVERTER FOR MULTIPLE DC MICROGRID APPLICATION
Author(s):
Shijo James, G.Sinthana
Keywords:
DC/DC converter, DC microgrid, Fuzzy logic controller, MPPT, Multiple renewable energy sources, PWM inverter, Storage unit.
Abstract
This paper presents a micro grid consisting of different distribution generation(DG) units such as PV, Wind, Fuel cell, battery that are connected to the distribution grid. The proposed micro grid consists of a PV array and wind which functions as the Primary generation unit of the micro grid. A proton exchange membrane fuel cell is used to supplement the variability in the power generated by PV and Wind. A lithium-ion battery is also used to store energy from PV, Wind & Fuelcell and its energy is given to the load/grid during peak energy demand. MPPT is used to extract the maximum output voltage from PV and Wind. Here Perturb and Observation algorithm is used, because it is the simplest MPPT algorithm to get effective output. In standard inverter without the PWM technique, the output voltage changes according to the power consumption of the load. The PWM technology corrects the output voltage greater according to the value of the load by changing the width of the switching frequency in the oscillation section. As a result of this, the AC voltage from the inverter changes depending upon the width voltage of the switching pulse. The PWM controller in the inverter will make correction in the pulse width of the switching pulse based on the feedback voltage and the inverter will give a steady output voltage irrespective of the load characteristics. LC filter is used to eliminate harmonics from the inverter.SEPIC converter is used for output current and voltage regulation. ANN controller is used to eliminate error in the output voltage and maintain constant output voltage at the load/grid side.
Article Details
Unique Paper ID: 145718

Publication Volume & Issue: Volume 4, Issue 11

Page(s): 330 - 335
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