Optimization-Based Design of SVC Wide-Area Damping Controller for Power System Stability Enhancement

This paper proposes a systematic approach for the design of wide-area damping controller for static VAR compensator (SVC). The proposed approach is developed in the form of a two-stage optimization problem. In the first stage, the problem of identifying the optimal feedback signal of the controller is solved, while the second stage is concerned with finding the optimal controller parameters. The optimal feedback signal is considered as a weighted summation of multiple signals that have the same type. The weights are determined optimally, where two signal selection approaches are considered for problem formulation. The two selected approaches are the geometric approach, and the residues approach. In the second stage, a multi-objective optimization problem is formulated to obtain the desired performance of the closed loop system. Both optimization stages are solved using Self-adaptive Multi-population Elitist Jaya Algorithm (SAMPE-JAYA). The proposed methodology is tested on the Western System Coordinating Council (WSCC) 3-machine, 9-bus system. Both modal analysis and nonlinear simulations have been carried out to confirm the effectiveness of the proposed design methodology.