Cooperation of Wide Area Control with Renewable Energy Sources for Robust Power Oscillation Damping

In this paper, a Wide Area Control (WAC) scheme cooperates with Renewable Energy Sources (RESs) to achieve a robust power oscillation damping. The WAC signals are synthesized by a two-level hierarchical controller which utilizes global measurements from all the installed synchronous generators to maximize the performance of the generators’ local controllers. In the proposed WAC scheme, the dynamic operation of RES is also taken into consideration for the implementation of WAC signals, in order to make the generators “aware” of the RES oscillations. Further, the local controller of the RES is modified in order to utilize the available reactive power for compensating any local voltage oscillations, leading that way to a controller which does not require any WAC signals. The performance of the proposed scheme has been tested and validated in the IEEE 9-bus test system where it is indicated that the proposed scheme improves the power system’s dynamic stability.