Constrained search space selection based optimization approach for enhanced reduced order approximation of interconnected power system models.

Metaheuristic search-based optimization strategies have recently emerged to obtain approximated models for interconnected complex power systems. However, these algorithms are frequently criticized for randomly selecting lower and upper search space boundaries and taking longer to simulate. The incorrect selection of suitable boundaries for each unknown decision variable may result in an inaccurate or unstable reduced model.

All-PD control of pure Integrating Plus Time-Delay processes with gain and phase-margin specifications.

It is well known that PD controller, though yields good servo response, fails to provide satisfactory regulatory response for Integrating Plus Time-Delay (IPTD) processes. On the other hand, using an integral control action generally leads to large overshoot or settling time. To achieve good servo as well as regulatory response, a new all-PD control structure is proposed for IPTD processes in this paper.