TRANSMISSION NETWORK

Flexible AC Transmission System (FACTS) controllers, such as the Static Var Compensator (SVC), employ latest technology power electronic switching devices in electric power transmission systems to control voltage and power flow, and improve voltage regulation. There is increase in demand for electricity globally to feed the technology driven economy. Given a profit-driven, deregulated electric power industry coupled with increased load growth, the power transmission infrastructure is being stressed to its upper operating limits to achieve maximum economic returns to both generation and transmissions system owners. In such an environment, system stability problems such as inadequate voltage control and regulation must be resolved in the most cost-effective manner to improve overall grid security and reliability. Static Var Compensators are being increasingly applied in electric transmission systems to economically improve voltage control and post-disturbance recovery voltages that can lead to system instability. An SVC provides such system improvements and benefits by controlling shunt reactive power sources, both capacitive and inductive, with state-of-the-art power electronic switching devices