Coordinated voltage control of synchronous condensers using wide-area measurements

This paper proposes a coordinated voltage control of synchronous condensers using wide-area measurements. The control is able to determine a coordinated control scheme of synchronous condensers to maintain stable post-fault voltages. A voltage control model with synchronous condensers has been established using wide-area measurements. By applying Networked predictive control (NPC), the time delay of a wide-area measurement system (WAMS) is compensated, and then, the relation between predicted voltage deviations and a sequence of controls is derived. The solution to the voltage control problem is formulated as a quadratic programming (QP) over a finite horizon. Finally, the proposed coordinated voltage control scheme is obtained by repeated procedures involving prediction of voltage deviations, solution of the QP problem, and step-by-step feedback correction. The New England 39-Bus system is used to validate the effectiveness of the proposed scheme.