A Review on Power Quality Improvement Issues using Different Controllers Techniques

The Unified Power Flow Controller (UPFC), which manages the power, is one of the most significant aspects of the Flexible AC Transmission (FACTS) controller devices. Due to the larger number of loads and the dynamic nature of high-power quality electric power systems, disturbances occur on a regular basis. In this study, we improve its performance disturbances to limit their demand and alleviate power quality difficulties. Controlling the distribution of AC power FACTS (Flexible Alternating Current Transmission System) plays a critical role in improving power quality and its management. The UPFC (Unified Power Flow Controller), which combines series and shunt active filters, plays an important role in the FACTS controller, as well as being capable of managing active and reactive transmission lines. In this article, UPFC is employed to reduce voltage swells and sag. In addition, a UPFC-based circuit model for rectifier and inverter circuits was established in this research. At the receiving end, changing the control angle in reactive and real power. UPFC is meant for installation to control the performance of transmission lines in order to control the power flow. The active power flow will be employed in the transmission line to install the control power in the UPFC. Voltage and sags swells have the following effects: voltage stability, failure of minimal voltage devices or measurement and control equipment, and communication signal interface [1], At the point when power framework exposed to an unsettling influence than thought of control also, soundness of voltage becomes significant.