• Dr.V.Subha Seethalakshmi
• Dr.K.VISHALATCHI
• Dr.N.Vengadachalam,

The need to provide pollution free electricity has encouraged a rise in the use of solar energy grid connections. As a result, voltage harmonics and voltage distortion develop when a solar panel is connected to the grid, both of which are power quality concerns. Active power filters are an important method for reducing harmonics. The objectives of this paper is to integrate series active and shunt active power filters into a single unified power quality conditioner (UPQC). Its principal function is to compensate the voltage imbalance, reactive power, negative sequence current, and the harmonics. The compensation theory and control technique of the UPQC are thoroughly discussed in this paper. An approach based on unit vector template control with a phase locked loop based control algorithm is used in this approach to control the solar grid linked with the unified power quality conditioner. The system's performance will be thoroughly validated using MATLAB simulation, which will address load fluctuation, transient response, total harmonic distortions, voltage swell, and sag, among other things. The IEEE standard range of Total Harmonic Distortions is achieved using the specified grid integration of solar systems employing a single phase unified power quality conditioner.

Energy storage system, UPQC, grid stability, power improvement and harmonics.

"Enhancement of power quality in solar power using UPQC technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 6, page no.f749-f754, June-2021, Available :http://www.jetir.org/papers/JETIR2106804.pdf

"Enhancement of power quality in solar power using UPQC technique", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 6, page no. ppf749-f754, June-2021, Available at : http://www.jetir.org/papers/JETIR2106804.pdf