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To achieve optimal energy extraction from photovoltaic array during partial shading (PS) condition, a maximum power points tracker (MPPT) with good performance is highly demanded. One of the main criteria of a good MPPT is the accuracy to track the maximum output power with minimal time. Therefore, few equations are proposed by the researchers to predict the peak voltage (Vlp) of PV array during PS...
Over the past few decades, the world demand for energy has risen steadily, forcing the world communities to look for alternative sources. Photovoltaic (PV) is seen as the most promising solution for this demand. However, the PV system is popularly known to suffer from low‐energy harvesting due to the change of environment conditions. An inexpensive and practical solution to extract the energy from...
In this paper, a population-based direct global optimization technique called Dynamic Population Size Differential Evolution (DynNP-DE) to deal with partial shading occurrence is proposed. In this proposed technique, the size of the population is significantly reduced without compromising the robustness of the original DE algorithm. To evaluate the effectiveness of the proposed MPPT technique, the...
This paper presents the utilization of a direct search technique known as differential evolution (DE) to improve the tracking of maximum power point (MPP) for photovoltaic power generation system. The proposed method is able to track the real maximum power point in most circumstances particularly during non-uniform or rapidly changing insolation conditions. The algorithm is proven to perform well...
This paper presents the analysis of Fuzzy Logic controller for permanent magnet brushless DC motor drive for simulation and experimental results. Initially a fuzzy controller is developed by using MATLAB Fuzzy-Logic Toolbox and then inserted into the Simulink model. The dynamic characteristics of the brushless dc motor such as speed, torque, currents and voltages of the inverter components are easily...
This paper presents the analysis of Fuzzy Logic controller for permanent magnet brushless DC motor drive. The brushless direct current (BLDC) motor is efficiently controlled by Fuzzy logic controller compare to the other type of controllers. The dynamic characteristics of the brushless dc motor such as speed, torque, currents and voltages of the inverter components are easily observed and analyzed...
This paper presents the study and analysis of the fuzzy and PI control system applying to Permanent-Magnet Brushless DC (BLDC) motor. The most commonly used controller for dc motor controller system is Proportional-Integral (PI) controller. However, the PI controller has some disadvantages such as: high starting overshoot, sensitivity to controller gains and sluggish response due to sudden load disturbance...
This paper presents theoretical and experimental aspects related to the implementation of a Digital Signal Processor (DSP) based Sinusoidal Pulse Width Modulation (SPWM) for single phase inverter. Two sinusoidal reference signals complement to each other are compared with a carrier signal to generate PWM signals for the switches. A digital SPWM algorithm is implemented in DSP TMS320F2812 using SIMULINK...
This paper presents the programming and use of TMS320F2812 digital signal processor (DSP) in generating the digital pulse width modulation (DPWM). The structure and functions of eZdsp 2812 board used in this work is explained briefly and the steps need to be taken for the programming is explain in detail to control the frequency, the duty cycle and dead band of the generated PWM. The PWM generated...
Pulse-width modulation (PWM) of a signal or power source involves the modulation of its duty cycle, to either convey information over a communications channel or control the amount of power sent to a load. This paper presents work on modelling and simulation of modified unipolar PWM applied to a single phase DC-AC converter (inverter) as switching control schemes. The harmonic analysis for switching...
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