Patent ID: 8498752

Claim:
A power system controller comprising: a 2×2 decoupling controller having a real power error value input and separate reactive power error value input, a frequency delta value output and separate voltage delta value output, and a processor configured to the frequency delta value by independently and simultaneously changing values corresponding to both the real power error value and the reactive power error value using a matrix of four controllers, and configured to compute the voltage delta value by independently and simultaneously changing values corresponding to both the real power error value and the reactive power error value using the matrix of four controllers; a reference model having a processor configured to compute from the frequency delta value and the voltage delta value a predicted real power value and a predicted reactive power value using a 2×2 matrix whose elements are functions of measured values; a feedback circuit combining outputs of the reference model with real-time measured real and reactive power values from a generator to form a combined signal, and feeding back the combined signal to the 2×2 decoupling controller, wherein the feeding back includes introducing a time delay of the predicted real power value and the predicted reactive power value; wherein the real power error value input and the reactive power error value inputs are based on the combined signal and the time delay; wherein the 2×2 decoupling controller is further configured to computationally decouple values of real power and reactive power in order to compute the frequency delta and the voltage delta.