Abstract
In this paper, nonlinear sliding mode control (SMC) techniques formulated for extracting maximum power from a solar photovoltaic (PV) system under variable environmental conditions employing the perturb and observe (P and O) maximum power point tracking (MPPT) technique are discussed. The PV system is connected with load through the boost converter. A mathematical model of the boost converter is derived first, and based on the derived model, a SMC is formulated to control the gating pulses of the boost converter switch. The closed loop system stability is verified through the Lyapunov stability theorem. The presented control scheme along with the solar PV system is simulated in MATLAB (matric laboratory) (SMC controller and PWM (Pulse Width Modulation) part) and PSIM (Power electronics simulations) (solar PV and MPPT algorithm) environments using the Simcoupler tool. The simulation results of the proposed controller (SMC) are compared with the classical proportional integral derivative (PID) control scheme, keeping system parameters and environmental parameters the same.
Highlights
The current global energy demand of the world has been continuously tremendously increasing due to various reasons, such as population growth, general economic growth, and industrial growth.The majority of energy needs have been fulfilled over the centuries by fossil fuels.Major concerns associated with fossil fuels are ever-increasing prices and adverse effects on nature, which results in a global energy crisis due to limited supply
While the PV panel along with the boost converter and maximum power point tracking (MPPT) algorithm simulations are performed in PSIM
(SMC) based on a mathematical of a boost converter hasa been derived for amode photovoltaic
Summary
The current global energy demand of the world has been continuously tremendously increasing due to various reasons, such as population growth, general economic growth, and industrial growth. In Reference [21], a non-linear, robust integral backstepping-based MPPT control scheme is proposed for MPP tracking of the PV array. The most attractive eminent to feature of SMC that it is selection of alaw control lawdiscontinuous that will make the switching function the system stateis [24] This completely insensitive to parametric uncertainty and external disturbances during the sliding mode. The PID controller is designed from the linearization of the PV system around a specific operating point, e.g., the MPP at the lowest irradiance for a stand-alone system, as in Reference [13]. The controller has been derived the mathematical model of areference nonto the controller to provide reference peak power voltage, which can be tracked by the proposed controller. Will ensure that maximum power is generated by the system
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