Abstract
A global solution to the problem of transient stabilization of multimachine power system with non-negligible transfer conductances was recently reported. The proposed scheme is a centralized nonlinear dynamic controller that ensures global asymptotic stability of the desired operating point. Due to technological and reliability considerations the exchange of information between generators is restricted, hence the need for decentralized controllers. The main contribution of this paper is the proof that, using local measurements available with existing technology, it is possible to transform the previous centralized controller into a truly decentralized one—provided the derivative of the active power at each generator can be suitably estimated. Some simulation results using the 10-machine New England benchmark show that transient stability enhancement and voltage regulation under different fault scenarios is effectively achieved.
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