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Monday, 28 May 2018

Performance Analysis of PV Solar Power System

Abstract-

In this paper I have extended my previous work. Previously I have done performance analysis of PV Solar Power System with the help of PV SYST Software, in which 10kWp grid-connected PV Solar Power System is simulated. The energy supplied to the grid and the main performance analysis is done by considering the effect of different global irradiation and temperature, the annual performance ratio is also considered, with normalized production and loss factor. Now I have analyzed Power Quality parameter in which I take harmonic because harmonic content in a supply have significant effect on power system. THD in output voltage of 10kWp grid connected PV Solar Power System is measured by using Harmonic Analyzer 5850. Finally found the harmonic on system on addition of 50kWp PV Solar Power System which university is planning to install in order to reduce the cost of electricity and effect on harmonics by boosting reactive power in a system by using ETAP simulation software. The harmonic level increases on addition of 50kWp PV Solar Power System, but remain within acceptable limit as per IEEE guideline standard.

INTRODUCTION

 Today when there is crisis for fossil fuel on earth solar energy emerged as boon for our increasing power demand. PV Solar power system is a best way for conversion of solar energy in to electricity and today due to reduction in PV panel prices it is affordable. And roof top PV Solar Power System even solve our issue of land area. Thus, best utilization of suns free energy. Now when it comes to electrical output of a system, the measure concern is power quality, however, it is actually the quality of the voltage that is being addressed. The power supply system can only control the quality of the voltage; it has no control over the currents that particular loads might draw. Therefore, the standards in the power quality area are devoted to maintaining the supply voltage within certain limits.


AC power systems are designed to operate at a sinusoidal voltage of a given frequency [typically 50 hertz in India] and magnitude. Any significant deviation in the waveform magnitude, frequency, or purity is a potential power quality problem. One of which is harmonics simply say distortion of the waveform. Distortion is any deviation from the normal sine wave for an ac quantity. Harmonics are sinusoidal voltages or currents having frequencies that are integer multiples of the frequency at which the supply system is designed to operate. Harmonic distortion is caused by nonlinear devices in the power system. Nonlinear load is Electrical load that draws current discontinuously or whose impedance varies throughout the cycle of the input ac voltage waveform. Harmonic distortion levels are described by the complete harmonic spectrum with magnitudes and phase angles of each individual harmonic component. It is also common to use a single quantity, the total harmonic distortion (THD). The THD is a measure of the effective value of the harmonic components of a distorted waveform. [1] This index can be calculated for either voltage or current by: THD = 𝑀ℎ ℎ𝑚𝑎𝑥 2 ℎ>1 𝑀1 where Mh is the rms value of harmonic component h of the quantity M.

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