Power Electronic Converters Evolution In Transmission System: HVDC & FACTS Device

Abstract

Power electronics have helped achieve this objective of increasing capacity while improving reliability and sustainability and reducing operating costs over the years. They have provided added flexibility and control to power systems. As the use of renewable energy (RE) sources in faraway or isolated areas grows, it becomes necessary to integrate these alternative energy sources into the current power grid through long distance transmission systems. Within the realm of power electronic assets, FACTS and HVDC have had a significant impact on the development of sustainable grid infrastructure. Recent developments in power semiconductor devices, specifically in voltage source converter-based technology, have made it easier to use HVdc systems and FACTS devices in transmission networks. Converters with higher power ratings and more switches are being used more often for transferring large amounts of power and integrating renewable energy on a large scale. This has led to a greater need for effectively and efficiently managing power converter assets. The traditional HVDC system with line-commutated converters (LCC) and the HVDC system with pulse-width modulation (PWM) - voltage source converters (VSC) are evaluated using economic, technical, and environmental factors. Analyzed are different considerations regarding the installation of HVDC or FACTS devices to enhance the controllability of power transfer in power networks, particularly those with lengthy transmission lines.

Keywords

• hvdc transmission system
• facts devices
• power electronic assets
• line commutated convertors
• voltage source convertors