Two-stage splitting control design for large scale power systems

In this paper, a new splitting control design method is proposed. The new scheme is based on the concept of critical machines and the approach of trajectory analysis. The two design stages focus on the system stability and viability issues respectively. Based on the trajectory analysis technology, different control measures can be combined together to prevent the possible island collapse after splitting. The power quality in each island can also be improved. Appropriate designs make the system splitting a competitive emergency control measure but not just the last resort of the security control.