The Derivation of the Energy Function reflecting Governor's Integral Control Loop, and Direct Stability Analysis

조속기 적분제어회로를 고려한 에너지함수 유도 및 과도안정도 해석

In this paper, the derivation of the energy function reflecting the governor's integral control loop is presented. When integral control is considered we obtain oscillatory response of the loop at the price of reducing frequency error. In other words, as $K_I$ is inclosed, the region of stability is decresed. When derived energy function is applied to the one machine infinite bus system, we showed that this function can be used to assess stability.