International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 12 | Dec -2016 www.irjet.net p-ISSN: 2395-0072 © 2016, IRJET | Impact Factor value: 4.45 | ISO 9001:2008 Certified Journal | Page 1255 Design & Analysis of ANFIS Controller for Three Phase UPS System under Unbalanced Loads & Distorted grid voltages Y. Harish Babu 1 , M. Rama Sekhara Reddy 2 1 Student, Dept. of Electrical and Electronics Engineering, JNTU College of Engineering, Ananthapur, AP, India. 2 Assistant Professor, Dept. of Electrical and Electronics Engineering, JNTU College of Engineering, Ananthapur, AP, India. ---------------------------------------------------------------***---------------------------------------------------------- Abstract: This paper proposes a basic ideal voltage control technique for three-stage uninterruptible-control supply frameworks. The proposed voltage controller is made out of a criticism control term and a repaying control term. The previous term is intended to make the framework blunders unite to zero, though the last term is connected to make up for the framework instabilities. In addition, the ideal load current spectator is used to streamline framework cost and dependability. Completely, the shut circle soundness of an onlooker predicated ideal voltage control law is numerically demonstrated by displaying that the entire conditions of the increased eyewitness predicated control framework mistakes exponentially unite to zero. Not at all like forerunner calculations, the proposed strategy can make a tradeoff between control input greatness and following blunder by just winnowing fitting execution records. The viability of the proposed controller is approved through reproductions. Determinately, the similar results for the proposed conspire and the traditional input linearization control plan are displayed to show that the proposed calculation accomplishes a superb execution, for example, quick transient replication, minute enduring state mistake, and low aggregate consonant contortion under load step change, unequal load, and nonlinear load with the parameter varieties. Key Words: : Adaptive Neuro Fuzzy Interface System (ANFIS),Optimal stack current eyewitness, ideal voltage control, three-stage inverter, add up to symphonious mutilation (THD), uninterruptible power supply (UPS). I INTRODUCTION With the advancement of data innovation, uninterruptible power supply (UPS) frameworks have turned out to be extremely prevalent together with the instruments of PCs, therapeutic/life-emotionally supportive networks, media transmission and modern controls. At the point when the utility lattice control has a dropout, the PC control supply can debase and the PC may crash. On the off chance that the info A source has lists and surges, the PC may incite blunder message. To keep up a top notch energy to the heaps, for example, PCs and correspondence gear, UPS is ineluctable. An elite UPS framework ought to have an unsullied yield voltage with low aggregate symphonious contortion (THD) for both straight and nonlinear burdens, high proficiency, awesome dependability and quick transient replication for sudden power lattice disappointment and load changes. Regardless of varieties in the information source or load condition, keeping up a steady voltage and consistent recurrence supply for basic burdens, is the real capacity of an UPS (Senthil Kumar et al 2010). UPS supplies, the required uninterruptible AC to straight and nonlinear burdens. In synopsis, a perfect UPS ought to have the accompanying elements. Directed sinusoidal yield voltage with low THD and autonomous from the transmutations in the information voltage or in the heap, on-line operation that means zero changing time from commonplace mode to move down mode and the other way around, low THD sinusoidal info current and solidarity control calculate, high unwavering quality, high efficiency, lowelectromagnetic interference (EMI) and acoustic noise, electric segregation, low upkeep, and minimal effort, weight, and size. Diode rectifier, Pulse Width Modulation (PWM) inverter, input/yield channel, DC-connect capacitor, battery charger and battery, battery on/off switch, and load transformer are the significant segments of this framework (Praveen K.Jain et al 1998). For the DC–AC transformation, a full-connect PWM inverter is utilized. A channel is used to get the sinusoidal waveform from the PWM altered heartbeat waveform (Sunil Kumar Gupta et al 2010). A change is used to shield the battery from lifted current levels that surpass the assignments of the battery maker (Nimrod Vazquez et al 2002). The topology jars work in two distinct modes, in particular, ordinary/charging and reinforcement modes (Praveen K.Jain et al 1998). In the everyday/charging mode, the battery on/off switch is opened. Thus, the air conditioner principle supplies the heap control all through the PWM inverter and charges the battery at steady present as well(Rajarajeswari et al 2008).A rectifier is used for changing over the air conditioner voltage into dc voltage, for charging Batteries (SenanM.Bashi et al 2009). In the reinforcement