Robust Sliding Mode MPPT Controller Based on High Gain Observer of a Photovoltaic Water Pumping System

High gain observer for a class of nonlinear systems with coupled structure and sampled output measurements: application to a quadrotor

“…u = [ f τ ] T ∈ R 4 with τ = [ τ φ τ θ τ ψ ] T ∈ R 3 . The modelling process of the quadrotor is comprehensively presented in Guisser and Medromi (2009) where it has been shown that the underlying translational and rotational motions are described by the dynamical model…”

A comparative study between PI and cascaded sliding regulator based on rotor flux oriented control for photovoltaic pumping system and fuzzy MPPT optimization

“…The photovoltaic pumping system consists of collecting solar energy via photovoltaic panels to produce electricity which supplies an electric pump to ensure drainage of water [3]. In the direct coupling of the pumping system with the GPV, the operating point is sometimes very far from the maximum power point (PPM), in particular for low illumination.…”

Nonlinear Control Design for Maximum Power Point Tracking and Unity Power Factor of a Grid-Connected Photovoltaic Renewable EnergySystems

“…Firstly, since the output power ofthe solar cell is easily influenced by environmental factorswith obvious nonlinear factor, the photovoltaic cell is a veryunstable power supply, so designing an efficient and reliablemaximum power tracking control strategyis required to match the PV panelpower to the irradiation and temperature changes.Many algorithms have been developed for trackingmaximum point of a PV panel such as Perturb and Observation [1], and Incremental Conductance [2], neural network [3], fuzzy logic control [4] and slidingmode controller [5], [6], [7], [8]. Secondly, since the inverter is running excessive harmoniccurrents injected into the grid, the power system harmonicpollution problem is getting worse.…”