Twenty First century electrical power network is becoming complex due to evolution of EV, integration of RE resources and use of semiconductor material-based device & appliance. This combination is giving a boost in power quality problem. The paper surveys the PQ issues based upon nonlinear loads, analysis by ETAP software to understand PQ issue, modified Newton-Raphson algorithm with and without SPV incorporation in the system and analysed to calculate discrete harmonics, Realtime harmonic estimation technique, EV charging & storage under RE resources to provide stabilization and regulation of system voltage, Unified Power Quality Conditioner (UPQC) based application, LCL filter-based method for increased output and equilibrium accuracy. This paper was reviewed in the domain of Power Quality issues to manage, investigate and find out research gap for development of control strategy.