Photovoltaic System with SEPIC Converter Controlled by the Fuzzy Logic

Abstract

In this work, a fuzzy logic controller is used to control the output voltage of a photovoltaic system with a DC-DC converter; type Single Ended Primary Inductor Converter (SEPIC). The system is designed for 210 W solar photovoltaic (SCHOTT 210) panel and to feed an average demand of 78 W. This system includes solar panels, SEPIC converter and fuzzy logic controller. The SEPIC converter provides a constant DC bus voltage and its duty cycle controlled by the fuzzy logic controller which is needed to improve PV panel's utilization efficiency. A fuzzy logic controller (FLC) is also used to generate the PWM signal for the SEPIC converter. Keyword:DC-DC converter Duty cycle Fuzzy logic controller (FLC) Photovoltaic System (PV) Single ended primary inductorconverter (SEPIC)

Modeling and simulation of SEPIC controlled converter using PID controller

“…The DC-DC converters that operate on a switched mode are an example of time-varying non-linear dynamic systems [1][2][3][4][5][6]. These converters contain specialized switches that can be applied to manipulate their topological structure over-time as well as the time variation in the energy storage ingredients as their diodes have non-linear current-voltage properties [7,8].…”

“…These converters contain specialized switches that can be applied to manipulate their topological structure over-time as well as the time variation in the energy storage ingredients as their diodes have non-linear current-voltage properties [7,8]. Some of the common uses of DC-DC converters include controlling the traction motor in the engines of electric cars, forklift trucks, marine hoists, mine haulers, and trolley cars [1,3,9,10]. This is primarily due to its increased efficiency in the rapid dynamic response and acceleration control [1,3,4,11].…”

“…Some of the common uses of DC-DC converters include controlling the traction motor in the engines of electric cars, forklift trucks, marine hoists, mine haulers, and trolley cars [1,3,9,10]. This is primarily due to its increased efficiency in the rapid dynamic response and acceleration control [1,3,4,11]. These converters can be applied to improve energy conservation in transportation systems that have frequent stops through the use of regenerative braking to return energy back to its supply in DC motors [12,13].…”

Comparison of Different Control Techniques for Interleaved DC-DC Converter

“…But for non linear systems, FLC can be used [7]. Fuzzy Logic Controller (FLC) is used in many Engineering applications such as automobile, elevators, air conditioners, home appliances and in DC-DC converters [8]- [9]. Compared to other linear controllers, FLC presents better performance.…”

Improved Time Responses of PI & FL Controlled SEPIC Converter based Series Resonant Inverter fed Induction Heating System

“…A multiplied output, boost SEPIC PFC AC-DC converter to improve efficiency and have reduced count of components for multiple-load systems [23] has been proposed. A novel voltage fed quasi-load resonant inverter with variable power and constant frequency [24] was developed for SEPIC with fuzzy controlled induction heating appliances. This soft switching inverter, which uses IGBTs, is found to be more applicable for a multiple burner induction heating systems.…”