Photovoltaic (PV) water pumping systems have been increasingly popular in remote areas where grid is not accessible or is too costly to install. These systems are mostly used for agriculture and household purposes. Solar energy has the greatest potential of all the sources of renewable energy. In order to make solar energy competitive with the other forms of renewable energies, a better exploitation of its advantages especially environmental side, this will be possible only with the development of the less expensive and high output efficiency systems. This paper focused on PV-powered water pump using Separately Excited DC Motor is taken into account. The modeling of PV cell, Buck-Boost converter and Separately Excited DC motor with and without MPPT has been studied and developed. For MPPT hill climbing method is implemented and PV-powered water pump using separately excited DC motor pumping system fed by solar cell are simulated and their results for maximum mechanical output power are obtained and compared.Keywords: SEDCM, PV, PUMP, MPPT, PWM, LPF, MATLAB/ SIMULINK.
Providing clean, environmentally safe water for livestock in sufficient quantities continues to be a major concern for farmers and ranchers. Abundant water in remote locations in needed to insure that grasslands are grazed evenly. A solar powered water pumping system designed to determine the performance and reliability of the system. The simplest PV water pumping system consists of a PV array directly connected to an induction motor and a pump. This type of configuration is used for smaller applications and is economically competitive. PV pumps using induction motors are useful for individual homes and small communities. In this paper, PV-powered water pump using induction motor is taken into account. The modeling of PV cell, Buck-Boost converter and induction motor with and without MPPT has been studied and developed. For MPPT hill climbing method is implemented in the proposed model. This process works by increasing or decreasing the duty cycle of buck-boost DC to DC converter and observing its impact on the array output power and in case of PV-powered water pump using induction motor pumping system fed by solar cell are simulated and their results for maximum mechanical output power are obtained and compared.Keywords: IM, FLC, FBC, MPPT, PWM, LPF, MATLAB/ SIMULINK.
Due to increment of power demand here to find the new type of generation system. The concept of Renewable Energy Source (RES) is now become a most popular for generation of power. There are basically three types of RES is used for generation process, Wind, PV, fuel cell. Solar system is the one of the best RES techniques for generation of electrical power but it have some drawback. It is only used in the day time and has low efficiency. For improving the efficiency of the system here maximum power tracking is needed. Here in this paper discuss the Incremental Conduction based MPPT for tracking the solar power. The whole system is modelled in MATLAB software for checking the performance of the system.Keywords: PV Module, MPPT, MPOP, P & O, INC, MATLAB/ SIMULINK.
This paper present a single phase seven level photovoltaic (PV) inverter topology for grid connected PV system with a novel Pulse Width Modulation (PWM) control scheme. Three reference signals identical to each other with an offset equivalent to the amplitude of the triangular carrier signal were used to generate PWM signals for the switch. A Proportional Integral Derivative (PID) current control algorithm is implemented.to keep the current injected into the grid sinusoidal and to have high dynamic performance with rapidly changing atmospheric conditions. The inverter offers much less total harmonics distortion and can operate at near-unity power factor. Simulation results are compared with the conventional single phase three level and five level grid connected PWM inverter. The inverter is capable of producing seven level of output-voltage levels Vdc, 2Vdc/3, Vdc/3, 0, -Vdc, -2Vdc/3, -Vdc/3 from the DC supply voltage. Simulation results have been presented to demonstrate the suitability of the control method. Simulation results exhibits improved performance of the system.Keywords: Grid Connected, MLI, PV, PWM, THD, MATLAB/ SIMULINK.
In this paper, the harmonic content and overall performance of a system including both a VFD and a SVC will be studied and analyzed. Specifically, the cases of Variable Frequency Drive (VFDs) and power electronic based static VAR compensation are examined. Static VAR Compensator and Induction Motor Dives Systems are modeled and simulated using a Matlab/Simulink environment. Simulation is carried out and results are compared with the IEEE standard limits. The simulation results were performed and tested to simulate a system which contained both fixed and power electronic based harmonic generating loads. The performance of system was determined by total harmonic current and voltage distortions, true power factor, and RMS current levels at different points in the system. The simulation results shows that a Total Harmonic Distortion (THD) is reduced from 16.38% to 0.36% for current and Total Harmonic Distortion is reduced from 6.99% to 0.26% for voltage in worst scenario, which is below 5% limits of Institute of Electrical and Electronics Engineers (IEEE) standard. In addition to that the system power factor is improved from 0.94 to 0.98.Keywords: IM, Harmonics, PQ, SVC, THD, VFD, MATLAB/ SIMULINK.