International Research Journal of Education and Technology

Unified Power Quality Conditioner (UPQC) can improve the power quality by injecting a voltage in series with the line and also can supply harmonics to the non linear load. This work deals with the design and the simulation of the UPQC system to improve the power quality in multibus system. The two bus system is modeled using the elements of Simulink and it is simulated using MATLAB. A sag is created by applying a heavy load at the receiving end. The sag is compensated by using the UPQC. The harmonics required at the receiving end are supplied by the inverter part of UPQC. The DC required by the UPQC is supplied by Solar cell and Boost converter system. The simulation results are compared with the theoretical results.

 This work also deals with design, modeling and simulation of UPQC in eight bus system to improve the power quality in multibus system. The UPQC system is modeled using MATLAB. A dip in voltage is produced by applying a heavy load at the receiving end. The sag is compensated by using the UPQC. The harmonics required at the receiving end are supplied by the active filter part of the UPQC. The simulation results of eight bus system are presented.