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In this paper, a grid-connected version of the switched PV array will be presented. The PV array consists of n parallel-connected strings and m series-connected modules per string, i.e. an array with a dimension of (m × n). Using the proposed switched PV approach, each string can be reconfigured to form two parallel strings of m/2 modules per string resulting in a new array with a dimension of (m/2...
Operation under partial shading condition (PSC) significantly decreases energy extracted from photovoltaic (PV) power plants. Non-uniform insolation caused by the passing clouds and natural obstacles results in some PV modules to be effectively excluded from operation. Commercially used maximum power point tracking (MPPT) algorithms do not have any information about the global behavior of the PV string...
Transformerless photovoltaic systems are one of the best options to connect a photovoltaic system to the electrical grid given their high efficiency, low cost, small size and low weight regarding their counterparts based on a transformer. In this paper a multilevel single-phase inverter is aimed to link a photovoltaic generator with the electrical grid with reduced common mode current. A sinusoidal...
This paper presents the analysis of force harmonics and eddy current damping for 2 DOF moving magnet linear motor (MMLM), which is utilized in magnetically levitated (maglev) positioning systems. A novel current-force model considering higher-order harmonics is proposed for MMLM in this paper, and this model provides an analytical tool to analyze the force ripple effect in MMLM theoretically. A commutation...
With the advent of PoL (Point of Load) technology, several commercial integrated switching regulators already have their space-qualified versions. Apart of its original purpose, other functions can be explored using those integrated circuits. In this work, Solar Array Regulation with Global Maximum Power Point capability is analyzed. Maximum power tracking and input voltage regulation have been studied...
Microelectrode Array (MEA), with a ring plate similar to a Petri dish, is a device used for in-vitro neuron culture and their electrophysiological signal recording. The analysis of these signals is useful for the study of neuronal network dynamics and the drug tests in pharmacological application, between others. The electric signals captured by MEA are of low amplitude and require special amplifier...
In this paper, Distribution Static Compensator (DSTATCOM) is proposed for load compensation using photovoltaic (PV) array and Permanent Magnet Synchronous Generator (PMSG) based wind turbine for dc generation; forming hybrid renewable energy sources based dc-link voltage source inverter (VSI). PV is installed along with Perturb and Observe (P & O) maximum power point tracking (MPPT) method applied...
The performance of a solar photovoltaic (PV) system mainly depends upon the solar radiation level and temperature. The total power generated by the PV array is affected by partial shading conditions and it gets decreased upon shading. In order to extract maximum power under partial shading condition this paper proposes a two-step, maxima of all peak power points (MPPP) algorithm for global maximum...
In this paper, two approaches based on sliding mode control for controlling a single-stage grid-connected three-phase solar photovoltaic system have been presented. The sliding mode control is robust and has good disturbance rejection as compared to the conventional proportional-integral control. Another advantage is that feedback linearization is not required for controlling nonlinear systems. There...
This paper proposes a control strategy for a single-stage, three-phase photovoltaic (PV) system connected to a distribution network. The control entails obtaining the maximum power point of the PV system by means of a control strategy that is based on an inner current-control loop and an outer DC-link voltage regulator. The current-control mechanism decouples the PV system dynamic from those of the...
This paper presents a centralized strategy for equalizing the state of charge of distributed energy storage systems in an islanded ac microgrid. The strategy is based on a simple algorithm denoted as equalization algorithm, which modifies the charge or discharge ratio on the time, for distributed energy storage systems, within a determined period of time in order to equalize the state of charge. The...
A photovoltaic (PV) supported cascaded H-Bridge multilevel inverter can be used to transfer the bulk solar power to the grid. It is considered that the dc link of the H-bridges is supplied from the PV array. The five-level cascaded H-bridge inverter enhances the power transfer rating and improves the output quality with carrier phase-shifted method of current control. Under varying radiation level...
Many companies face issues today in locating their assets and inventories in storage racks. In this study, we explored the use of passive UHF RFID for locating relative positions of items on storage racks. The storage rack with UHF RFID localization function is named as smart rack in this study. This paper addresses the technical issue of how to make use of the reference RFID tag signals to improve...
Currently, the Cartesian Genetic Programming approaches applied to regression problems tackle the evolutive strategy from a static point of view. They are confident on the evolving capacity of the genetic algorithm, with less attention being paid over alternative methods to enhance the generalization error of the trained models or the convergence time of the algorithm. On this article, we propose...
In this paper, a single stage highly efficient photovoltaic grid interconnected charging infrastructure has been designed for off-board DC charging for electric vehicles. This paper starts with the design of a single phase H-bridge quasi-z-source inverter (qZSI), component design and the pulse width modulation technique used. Then it discusses the control techniques used to control the power flow...
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