Partially decentralized controller for damping interarea oscillations in power systems

Frequency domain techniques for analysis and design of controllers with remote feedback signals to damp out interarea oscillations in large-scale power systems are proposed. The control of power systems may require some centralization in the near future. The main purpose of the paper is the design of a controller which is neither fully decentralized nor fully centralized, making it feasible, since only one remote signal is required for a controller. The sites where controllers should be applied and the most effective signals for each controller are determined by analyzing the input-output description of the system in the frequency of each mode of interest.