Understanding power system voltage collapses using ARISTO: Effects of protection

This paper is based on a project work of the course ldquoPower Engineering Design Projectrdquo given by the Division of Electric Power Engineering, Chalmers University of Technology in Sweden in Fall semester, 2008. The project has focused on simulating power system voltage collapse scenarios using Advanced Real-Time Interactive Simulator for Training and Operation (ARISTO) software. The simulated voltage collapse scenario was successfully implemented. To understand the effects of protection on voltage collapses, the study also focused on different ldquoblackout mitigationrdquo schemes to prevent the complete system blackout such as modification of settings of distance relays and blockings of critical circuit breakers on the transmission systems. The simulation results have shown that with these measures, substantial part of the system can be prevented from blackout. The Nordic 32-bus system is used in the study.