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This paper presents the designing and modeling of the Asymptotic Perturbed Extremum Seeking Control (aPESC) scheme that is capable to locate and track the Global Extremes on the multimodal patterns. The multimodal patterns may appear on power generated by a photovoltaic (PV) array under Partial Shading Conditions (PSCs), but also on net power generated by a Fuel Cell (FC) system. The proposed aPESC...
A real-time optimization (RTO) strategy for Fuel Cell Hybrid Power Sources (FCHPS) based on the control of the boost converter is proposed in this study. The reference current for boost controller is generated by the optimization strategy based on the Global Extremum Seeking (GES) scheme. The GES scheme will track the maximum value of the optimization function considered for the FC system. The second...
A new Extremum Seeking Control (ESC) scheme is proposed in this paper for multimodal function with two dimension (2D), named as ESC 2D — scheme. This ESC 2D-scheme is a Single Input — Double Outputs (DISO) control system that combine two ESC 1D-schemes of asymptotic perturbed type. Each ESC 1D-scheme has two control loop. The scanning loop generates the signal that sweep the searching space in order...
In this paper a comparison between three Maximum Power Point (MPP) tracking algorithms for the photovoltaic (PV) system based on: advanced Extremum Seeking (aES), modified Extremum Seeking (mES) controls, and Perturb and Observe algorithm (P&O) is proposed. The performances improvements are: higher search speed and accuracy tracking. So, different irradiance sequences are used to test the performances...
In the past years we have experienced a fast growth in the demand and widespread of mobile devices. The evolution of wireless network technologies has offered mobile devices direct access to Internet and so, now, many applications allow users to interact with their friends on social-networks, send emails, use internet-banking services and more, while on the move. Because of that, and the advance in...
This part of the paper presents the problem of solar energy conversion into electricity using photovoltaic cells. The mathematical study of PV cells could be made by two models: single diode model and double diode model. By connecting in series several PV cells a PV panel is obtained. Small PV power generators are made by connecting multiple PV modules to form a PV array. Photovoltaic panels can be...
The second part of the paper presents the MPPT systems for extracting maximum power from a photovoltaic installation. The maximum transfer between generator and receiver is obtained by interconnecting a DC-DC converter which performs continuous adaptation of load to a PV generator. This principle represents the basis of the MPPT systems. The PV cell power output mainly depends on two variables: insolation...
Solar energy has a huge potential to solve humankind energy problem, but harvesting it presents a lot of problem. One of this problem is the relative low performance of the photovoltaic panels. This paper presents in detail the maximum power point technique and the design need it to match the photovoltaic panel with the load.
In the second part of this paper the Maximum Power Point Tracking (MPPT) technique for photovoltaic (PV) panels based on modified Extremum Seeking Control (mESC) is analyzed. Even the mESC scheme differs from the classical ESC schemes only on the filters' topology and their used parameter, this proposed control improves quite enough the performances of the PV energy harvesting in comparison with a...
In first part of this paper the Maximum Power Point Tracking (MPPT) technique for photovoltaic (PV) panels based on Extremum Seeking Control (ESC) scheme is analyzed. It is important to know how much energy can be harvested from a PV that uses a MPPT controller. In this paper, the ESC schemes are analyzed in the frequency domain. The modified ESC (mESC) and high-order ESC (hoESC) schemes are considered...
In this paper a performances analysis of the Extremum Seeking Control (ESC) scheme applied to the dual-inputs single-output (DISO) systems is presented. These ESC 2D-schemes contain two ESC 1D-schemes that have a common input: the output of the DISO system. The performance of the basic high-order ESC (bhoESC) and band-pass filter ESC (bpfESC) 2Dschemes will be analyzed here based on the two orthogonal...
In this paper an analysis of the Extremum Seeking Control (ESC) 2D-scheme for the dual-inputs single-output (DISO) systems is presented. The ESC 2D-schemes have two loops where the output signal is obtained based on two different ESC algorithms proposed in the literature. The basic high-order ESC (bhoESC) 2D-scheme and an improved ESC variant will be analyzed here based on the two orthogonal dither...
In this paper is presented an innovative design and the practical implementation of a communication circuit intended to be used for long distances transmission of the signals from sensors. The circuit is suitable for integration within the conditioning modules that are used for processing of signals from sensors that are connected to remote data acquisition systems. Regarding his structure, the proposed...
In this first part of the paper, the architecture of the Hybrid Power Source based on Maximum Power Point tracking controller to harvest the energy available from used Renewable Energy Sources is presented. Usually, the energy harvesting is based on Extremum Seeking Control (ESC) loop. Two ESC schemes are proposed and analyzed in relation with the classical ESC schemes: (1) the modified ESC scheme...
In the second part of this paper, the dither persistence on the Extremum Seeking Control (ESC) loop is analyzed. The ESC scheme is usually used on Maximum Power Point (MPP) tracking controller to harvest the energy available from used renewable or green Energy Sources (ES). Two ESC schemes are analyzed in relation with dither persistence on output reference current: (1) the modified ESC scheme (named...
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