A Basic Study Of Fuzzy-logic-based Power System Stabilization With Doubly-fed Asynchronous Machine

Nowadays electric power systems are becoming more and more complex, and they are often subjected to various stability problems because of the unbalance between the power demand and power supply. Among the different ways being proposed to improve the dynamic performance of the system, a round rotor structure doubly-fed asynchronous machine (DASM) is investigated in the paper to control the active and reactive power of the system.On the other hand, because of the dynamic and stochastic nature of the operation of the power system, controller parameters that are suitable for one set of operating conditions may not be optimum for another set of operating conditions. Hence instead of the conventional way of calculating the desired power compensation from DASM, we applied fuzzy logic in the control strategy.In the paper, simulation studies on a single machine infinite-bus system show that such proposed fuzzy-logic based power system stabilization way with DASM is effective even when experiencing severe transmission-line failures. Comparison studies have also been performed between a conventional controller and proposed fuzzy logic controller.