Dr.Sridevi Tirunagari born in India in 1978. she received B.Tech in EEE from Nagarjuna University in 1999, M.Tech in Power systems from Jawaharlal Nehru Technological University, Anantapur, India in 2005 and Ph.D from J.N.T.U Hyderabad India in 2016.She is working as assistant professor in GNITS Hyderabad.
The increasing use of nonlinear loads such as adjustable speed drives, electric arc welders, and switching power supplies causes large amounts of harmonic currents inject into distribution systems. These harmonic currents are responsible for voltage distortion, increasing power losses and heat on networks and transformers, and causing operational failure of electronic equipment. Due to these problems, harmonic restriction standards such as IEEE–519 or IEC 61000–3–2 have been published to demand those harmonic currents injected into utility networks. In order to improve the power quality of distribution networks as well as to meet these restriction standards, two main solutions have been introduced: LC passive filters and active power filters (APFs). LC passive filters are traditionally utilized to compensate the harmonic currents since they are simple and low–cost solution.