International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
UTTILITY CURRENT COMPENSATION BY PV-APF SYSTEM USING FUZZY LOGIC CONTROLLER B. Suresh Babu1,C. prasanth sai2,M.Vijaykumar3 1PG
Scholar, Dept. Of Electrical & Electronics Engineering, JNTUA2CEA, Anantapuramu, A.P., India Dept. Of Electrical & Electronics Engineering, JNTUACEA, Anantapuramu, A.P., India 3Professor, Dept. Of Electrical & Electronics Engineering, JNTUACEA, Anantapuramu, A.P., India ---------------------------------------------------------------------***-------------------------------------------------------------------2Lecturer,
ABSTRACT- With the widespread use of power electronics devices such as rectifier, inverter etc. in power System causes serious problem relating to power quality due to this nonlinear loads currents drawn from the source get distorted and consist of the more no of harmonics so the source current get distorted. For eliminating these harmonics from the source an active power filter is used. In this paper a grid connected PV generator is integrated with the APF faction to eliminate the harmonics drawn from the utility. This system consist of dc/dc boost converter for extracting the maximum power from the PV generator by using the MPPT controller, and consist of dc/ac converter and a nonlinear load.APF function is implemented by using the VSC whose gate pulses is controlled by the APF controller. For designing this APF controller instantaneous power theory is used which shows the reliable performance. This combined system will extract the maximum power and eliminate source harmonics effectively. By replacing the PI controller in APF controller with the Fuzzy logic controller the performance of the system is better.
INDEX TERMS: Active power filter (APF), instantaneous power theory, photovoltaic (PV), VSC voltage source converter, power quality, renewable energy, fuzzy logic controller.
linear and this functioning can be implemented with active power filter. For implementing active power filter functioning in the system an APF controller is designed to the VSC which will act as active power filter to reduce the distributed harmonics drawn by the nonlinear loads. For implementing the APF controllers an instantaneous power theory is applied which will give the better performance. This PV system and APF controller will act as a integrated active power filter to the system which will simultaneously compensating the harmonics power factor and current imbalances in the system even there is no availability of power from the PV system this system can capable of eliminating the harmonics and improves the power quality. The basic idea of this paper is using the power references for designing the APF controller which will gives a good improvement in elimination of harmonics .by using this PV APF system gives the better solution to the elimination of harmonics instead of adapting the passive filters or a centralized APF(18).
2. PV-APF COMBINATION SYSTEM The PV APF system is shown in figure which consists of following.
1. INTRODUCTION A grid connected PV system or more popular now a day’s which will extract the power in clean environment.The output of the PV unit is connected to the dc/dc boost converter which will extract the maximum power from the PV unit by adapting the maximum power point tracking. By using MPPT technique the duty ratio of dc/dc boost converter is monitored according to the variation of the VI characteristics of the PV cell. The output from the boost converter is given to the dc/ac voltage source converter (VSC). The output from the VSC is fed to the utility and to the nonlinear load. During supplying power to this nonlinear load which will cause drawing nonlinear currents from the utility which will consisting of more harmonics. In this paper the Pv generator should provided with the distorted compensation capability which makes the current drawn from the source become
Š 2017, IRJET
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Fig.1 Proposed design of PV-APF combination. 1) The PV system consisting of 5 series and 66 parallel arrays which is sun power SPR-305 delivers power of 100Kw power at 1000W/m2 2) The dc/dc boost converter is operated at 5KHZ and its duty ratio is controlled by MPPT controller which uses the ISO 9001:2008 Certified Journal
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