Mitigate the Voltage Sag under Faults using UPQC
The main purpose of a UPQC is to mitigate current harmonics and voltage harmonics. It has the capability of improving power quality at the point of installation on power distribution systems. The video discusses the compensation principle and different control strategies of the UPQC in detail. The performance of UPQC is examined by considering, a diode rectifier feeding an RL load (nonlinear load) that acts as a source of harmonics, feeding harmonics into the three-phase distribution system of concern. The performance is also observed under influence of fault conditions in utility side disturbances such as voltage sag. This control strategy guarantees sinusoidal, balanced, and minimized source currents even under unbalanced and/or distorted system voltages. The control strategies for UPQC are modeled using MATLAB/SIMULINK and simulation results are presented to validate the proposed control strategy.