INTERNATIONAL JOURNAL OF SCIENTIFIC & TECHNOLOGY RESEARCH VOLUME 9, ISSUE 04, APRIL 2020 ISSN2277-8616 1834 IJSTR©2020 www.ijstr.org INVESTIGATION OF HARMONICS & OPTIMAL POWER FLOW IN IEEE 14 BUS SYSTEM USING ETAP SOFTWARE A.Subramaniya Siva , S.Sathieshkumar, T.Santhosh Kumar Abstract— Power system Analysis is the important part of power system engineering .The main intension of any electrical utility company is to deliver power with best quality. By expanding the utililiztion of power electronics gadgets (non linear load),sinusoidal waveform of current and voltage get deformed and deviated which leads to deterioration in power system quality. One of the important causes of improper power quality is power system harmonics and harmonics analysis need to investigate in filter to reduce this harmonics current and voltage. This Paper will discusses about the ,optimal power flow analysis and harmonics analysis on IEEE 14 bus systems in Renewable energy Source with and without PV and Wind interaction .Also the solution is recommended toward the end for the maintained of economic harmonics and losses with permissible limits using ETAP software Index Terms - PV, Wind, Harmonics Analysis, IEEE 14 Bus systems, ETAP software, power quality, optimal power flow analysis. ——————————  —————————— I. INTRODUCTION The continuous growth of renewable energy sources especially in the recent year in India has been encouraging on their influence and impact in the power quality. Power electronics devices used to connect the distribution generation to the electrical power systems generate electromagnetic disturbance thus their effect must be investigated. The use of power electronics devices and equipement generate the significant such as harmonics, inter harmonics recently named super harmonics Therefore the correct analysis of electrical signal harmonics content is extremely important to mitigate the problem caused in electrical power systems.[1]While contrasting with other inexhaustible source wind and sunlight based sources are create high MW power. In traditional vitality sources are produced the power in extremely long separation so it have high transmission misfortunes to reach at customers however in sustainable power sources are created the influence in short separation. Sustainable power sources like breeze and sun powered power structure an Appropriated Generation The primary issue today in control segment is misfortunes in dissemination network[2] .In old occasions, wind was utilized to move the sails of the boats. In this section, we will perceive how wind vitality is utilized to create electricity .A turbine changes over the active vitality of the breeze to valuable mechanical vitality [3]. This vitality could be utilized in mechanical structure or turn generator turbines and give power. Much the same as in the hydropower frameworks, wind vitality is tackled through transformation of the breeze dynamic vitality to mechanical vitality ingests progressively responsive power from the age source. In this way voltage drop happens in the appropriation systems and furthermore in conveyance organize have a few branches to isolate the power for buyers, it additionally make a reason for voltage drop. The effect of PV entrance at an enormous scale into the power dispersion systems, at extreme system conditions and area of flaw event stays dubious. This prompts the significance of analyzing the short out level to guarantee the legitimacy of interfacing such DG to guarantee smooth system activity and unwavering quality. There may be bothers of interfacing appropriated age, for instance, extending the voltage profile and outperforming the framework cut off, and therefore, this may oblige the relationship of the dispersed age to the framework [10].This paper will look at the effect of Doubly Fed Induction Generator wind turbines and sun powered exhibit on load stream examination, transient soundness and short out level in conveyance test framework utilizing ETAP programming this is done by ETAP software . II.SIMULATION OF IEEE 14 BUS SYSTEM In this single procession outline of an IEEE 14 transport framework is given about alter mode utilizing ETAP programming. The line chart comprises of 14 transports of power system analysis [. Transport 2 is taken as loose bus, & Generator 2 as taken as swing generator Bus 4 is a PV transport and transports 5,7,8,9 are PQ Busses .The transports are associated in communication line .Reproduction of IEEE 14 Bus system is perform utilizing ETAP Software & power stream in transmission line break down. ————————————————  A.Subramaniya Siva Assistant Professor, K.Ramakrishnan College of Engineering, Trichy, India , npksiva.ss@gmail.com  S.Sathieshkumar, PG Scholar, Power System Engineering,K.Ramakrishnan College of Engineering, Trichy, India, engineersathieshkumar@gmail.com  T.Santhosh Kumar, PG Scholar, Power System Engineering,K.Ramakrishnan College of Engineering, Trichy, India, santhoshkumargani1234@gmail.com