船舶闭环电力系统的柴油发电机保护研究

Research on Diesel Generator Protection of Marine Closed-loop Power System

将动力定位船舶的闭环电力系统和常规的柴油发电机保护系统进行对比,分析了常规保护系统的功能及其在闭环电力系统应用上的局限性。在此情况下,引入了“下垂特性”和“时间阈”概念,提出了一种适用于动力定位船舶闭环电力系统的柴油发电机保护系统,并详细阐述和分析该保护系统的设计原理和故障检测模型。该系统在实船试验中得到成功验证,通过了挪威船级社(DNV)的认可,为今后动力定位船舶复杂电力系统的保护设计提供指导和依据。

The closed-loop power system of the dynamic positioning ship is compared with the conventional diesel generator protection system. The function of the conventional protection system and its application limitations in the closed-loop power system are analyzed. Under this circumstance,the concepts of " droop characteristics" and " time threshold" are introduced. A diesel generator protection system suitable for closed-loop power systems of dynamic positioning ships is proposed,the design principle and fault detection model of the protection system are elaborated and analyzed in detail. The system has been successfully verified in the actual ship test and passed the approval of Det Norske Veritas( DNV). The system will provide guidance and basis for the protection design of the complex power system of dynamic positioning ships in the future.