Abstract
Nowadays, the improvement of power quality is the major concern in power system scenario. These problems mainly caused due to utilization of different load conditions to the power system. To mitigate these problems different methods are implemented in literature. As per literature analysis the one of the Flexible AC Transmission System called as unified power quality conditioner (UPQC) plays a key role. The series and shunt controllers of UPQC designed with 9-level inverters to reduce the harmonic distortions. An instantaneous PQ theory is used to generate the reference signals required for series and shunt controllers along with dq-transformation analysis. A Cuckoo optimization technique is used to tune the parameters of PI controller in shunt controller to achieve better harmonic distortions and improve power quality. This proposed system is to be tested and verified in MATLAB/SIMULINK.
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