Improvement of Power Quality using UPQC based Proportional Resonant (PR) Controller

The main source of energy used in today's industries is electricity. Disturbances in power quality occur due to changes in voltage and frequency. Power quality problem comes with the use of non-linear loads. Harmonic and power quality disturbances are caused by non-peak loads. If it detects a fault, harmonics are generated for a short period of time and the voltage is seen to be unbalanced. In this paper, UPQC (Unified Power Flow Controller) is introduced which is used to reduce the harmonic. For better improvement the UPQC is controlled by using the Proportional & Integral (PI) Controller and compared this proposed UPQC with the Proportional and Resonant controller (PR). UPQC is simulated using a MATLAB model with a PI controller. THD observed that the proposed UPQC is a strategy based on PI and PR controller. In this UPQC, the voltage distortion is effectively controlled, and a smooth compensated load voltage is obtained.