Sag Control Study of Ship Integrated Power System Under Impulse Load Shock

At present, in the field of marine engineering, the demand for the application of pulse loads is increasing day by day, and the common ones are: high-frequency radar, ice-breaking device and high-power electromagnetic system. Due to the high energy and short period characteristics of pulse loads, the input of pulse loads will impact the stability of ship integrated power system. To address this issue, this paper carries out simulation modeling for common ship integrated power system, and based on the simulation comparison of two different common types of pulse power load waveforms, discusses the impact of the sag control on the stability of the system under different circumstances. The results show that the larger the slope of the pulse power curve, the larger the impact on the system. At the same time, the use of sag control can effectively realize power distribution for the generating unit and improve the stability of the system, but the sag control also affects the generator output and leads to the fluctuation of bus voltage. And the impact on the system stability caused by the input of impulse loads with too high energy still needs to be buffered by external energy storage devices. These conclusions also provide a reference for subsequent studies.