Convertible static compensator project-hardware overview

The development and implementation of a ±200 MVA convertible static compensator (CSC), the latest generation of flexible AC transmission system (FACTS) technology, will help relieve transmission line congestion in Central New York State. The CSC, a power-electronics control device based on voltage source inverter technology, is part of a transmission system reinforcement project employing a combination of FACTS and conventional technologies. The CSC is being installed at NYPA´s Marcy 345 kV substation near Utica, New York. In addition, three 135 MVAr shunt capacitor banks will be installed at 345 kV substations across New York State. When fully implemented, this will provide a long-term solution to the power transfer limitations in Central New York by raising the limit of upstate-to-downstate power transfers by 240 megawatts, improving voltage and power-flow control, and maximizing the use of existing transmission assets. Enhancements to the reliability and resiliency of the network will be achieved at a critical time of electric power industry deregulation. NYPA is working together with EPRI, Siemens and a group of 21 utilities on the CSC development and implementation