Newton-Raphson's successive approximation method based TCSC controller

Transient voltage stability is a crucial and very rapid phenomenon that requires a very quick and accurate response to prevent voltage collapse in an AC system. One of the methods to prevent this situation is by using Flexible AC Transmission Systems (FACTS) controllers. This paper proposes a method that is based on the control of Thyristor Controlled Series Compensator (TCSC) from the Micro-controller so that the voltage stability requirement can be met easily. The proposed method is aimed to provide a quick response to prevent voltage collapse using a micro-controller, wherein, the Newtons-Raphson's approximation method is used for calculation of the conduction angle and thus the gating pulses are provided to the TCSC controller.