속도 변동률 최소화를 위한 비상용 동기발전기와 구동 엔진의 연동제어에 관한 연구

Abstract

In this paper, a coordinated control strategy is proposed between an emergency synchronous generator and its driving engine to reduce the generator’s output frequency variation rate. In conventional systems, the generator and the driving engine are controlled independently. As a result, a sudden change in load can cause a significant transient fluctuation in output frequency due to delayed fuel supply, which has been identified as a major factor that triggers protection mechanisms in electrical equipment or disrupts stable power supply. To address this issue, this study proposes a coordinated control structure that estimates the instantaneous power of the generator in real time and controls the fuel injection of the driving engine based on it. The proposed method has been developed to dynamically adjust the timing of the engine’s main injection according to variations in instantaneous power, thereby minimizing fuel supply delays under load fluctuations and enabling rapid and stable frequency recovery of the generator. This control strategy shows improved performance in terms of response time and frequency regulation compared to conventional governor-based methods, and effectively suppresses fluctuations in the generator’s output frequency. Furthermore, the proposed method suggests practical applicability to emergency power systems of various scales.