Interactional Coordination of High Voltage DC and Flexible AC Transmission System Elements

The reliability of an electrical grid is best determined after its performance has been analyzed and compared to other electrical systems that comply with the same standards throughout the world. Electric utilities all over the world have prioritized the need for rapid capacity growth, constrained by improved reliability and sustainability achieved through lower operating costs. In an AC/DC hybrid transmission system, power electronics technology and current control theory are used to provide high-voltage direct current (HVDC), and flexible alternating current (FACTS) systems, which have developed crucial methods for enhancing transmission power, flexibility, and network stability. This study investigates the concurrent operation of a 1414-kilometer bipolar HVDC network and a very feeble parallel 400/330-kilovolt AC line. The combination of an HVDC Line Commutated Converter (LCC) and a Static Var Compensator (SVC) is capable of ensuring reliable operation. Parallel operation of HVDC and FACTS devices, such as in extremely low power systems with increased stability requirements, is gaining popularity as system circumstances become more complex; thus, advanced technologies can further improve the performance of HVDC systems that are incredibly vulnerable and fragile.