Development of a laboratory model of SSSC using RTAI on Linux platform

Abstract

This paper presents the implementation of Static Synchronous Series Compensator (SSSC) controller on Real Time Application Interface (RTAI) for Linux Operating System (OS). RTAI provides real-time capability to Linux General Purpose Operating System (GPOS) over and above the capabilities of non real-time Linux environment, e.g. access to TCP/IP, graphical display and windowing systems, file and database systems. Both Type II controllers, DC voltage and current scheduling controllers, are implemented in RTAI. To create a user friendly environment, Graphical User Interface (GUI) is developed in Linux OS in user space (non real-time) using a software available from Quasar Technologies (Qt). The controller is tested on a small scale laboratory model of a Voltage Source Converter (VSC) connected in series with a transmission line. The real time controller performs well in both inductive and capacitive regions.