Alternating direction method of multipliers (ADMM) based distributed approach for wide-area control

摘要

Inter-connected power systems exhibits inter-area oscillations which limit power transfer capability between two areas. These inter-area oscillations can be damped using optimal wide-area control loop. In this paper a novel method is proposed for wide-area input-output signal selection based control using ADMM. In this approach, first interconnected power system is divided into areas. Then using measured data, a black-box transfer function model is estimated locally for each area based on Lagrange multipliers. The local area controllers communicate with the central controller to estimate a global transfer function model of the power system. Based on the estimated global transfer function, the residue corresponding to inter-area mode is calculated. This provides information of optimal wide area control loop. Residue and corresponding eigenvalue information is used for wide-area damping controller design. The performance of the selected optimal wide-area controller design is validated using Kundur two area test system on RTDS/RSCAD^® and MATLAB^® co-simulation platform.