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The faults can happen to transmission lines at any time, any places and caused by different reasons. An accurate and fast solution to detect, locate and isolate the faults will improve the quality of the power systems' performance. The time domain reflectometry (TDR) method basing on the analysis of reflected waveforms on the transmission lines to detect the faults and estimate the fault resistance...
Different equivalent circuit models can be found in the literature to describe the electrical performance of PV panels. Among all the models, the one diode models are widely used. However the determination of the electrical parameters of these models is not an easy task. In this paper, the particle swarm optimization (PSO) method was applied to extract the equivalent circuit parameters of PV panels...
In this paper the energy performance comparison of active high-frequency power factor correctors for three control methods (borderline control, peak current control and average current control) is made. In MATLAB/Simulink environment models corresponding to each method of control were developed. Functional circuit diagrams, throttle current charts and load voltage charts of each corrector are given...
This paper presents a simulation of PV system (PV panel, boost inverter and a resistance load) using M-file of MATLAB, To prove the efficiency of this system we applied two method of MPPT in the global algorithm, one classical and the other one is intelligent: the first one is called Perturbation and observation (P&O) used in stand-alone places or in simple installation and the later is based...
To improve the energy sources efficiency, maximum power point tracking (MPPT) is usually used in the control of photovoltaic (PV) systems and is implemented by the buck converter, the boost converter and the buck-boost converter. In this article, through studying deeply the output current-voltage(V-I) characteristic of solar photovoltaic and the mathematic model of three basic DC/DC converters, an...
A drive for Brushless DC motor (BLDCM), which is fully based on the adaptive fuzzy controllers, is presented in this paper. One of the fuzzy controllers is used in the speed feedback loop to guarantee the accurate speed control. The other fuzzy controller is used in the current feedback loop to track the current change. The proposed full adaptive fuzzy controllers have the characteristics of robustness,...
This paper presents the model of a solar photo voltaic (SPV) module to represent its behaviour in both forward and reverse bias conditions. This complete model arrives from the breakdown mechanisms in SPV cells and calculates the second quadrant parameters. It can be modified to any SPV cell in which reverse characteristic is subjected to avalanche mechanism and those influenced by shunt resistance...
This paper presents the equivalent circuit model of PBG (Piezoelectric Bender Generator) along with its SPICE implementation. The model, made of lumped circuit elements, is valid under both parallel and series wired PBG operation modes. The model is validated by comparing the simulation results, from the transient analysis of the model in SPICE, with those obtained by using MATLAB??. An example using...
Fuel cell technologies are expected to become a suitable substitution for conventional power generators and grid utility for residential applications, as they are more efficient and environmentally friendly in comparison with other conventional power generators. However, in order to provide power demand of a residential load, it may be required to over design fuel cell power module which is not economically...
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