Dynamic Remedial Action Scheme using online transient stability analysis

This paper describes a dynamic Remedial Action Scheme (RAS) which incorporates Wide-Area Monitoring Systems (WAMS) and online Transient Stability Analysis (TSA) for emergency control. The proposed scheme updates RAS control actions online based on the system operating condition and system configuration. The Single Machine Equivalent (SIME) method is used to compute stability margins for credible contingencies. A real-time test platform consisting of a Real Time Digital Simulator (RTDS), PMUs, a protocol gateway, a RAS logic controller, and the MATLAB-based TSA and RAS determination tool is developed to test the proposed approach. Test cases demonstrating effectiveness of the proposed dynamic RAS are presented.