I. Introduction
The shipboard power system (SPS) consists of various loads for propulsion, service, warfighting, and so on. Loads, such as electromagnetic guns, electromagnetic launch systems, and electron lasers, consume a large amount of power within a short period of time are called pulsed power loads (PPLs) [1]. Due to economic considerations, the capacity of an SPS is usually decided to mainly satisfy the needs of non-PPLs that are online most of the time, instead of meeting the possible peak demand of all loads [2]. Besides the capacity limit, it is almost impossible to increase the generation of conventional synchronous generators (SGs) instantaneously during the deployment of PPLs due to the slow dynamic response of prime mover. Large voltage sag in medium voltage dc (MVDC) SPS and large frequency drop in medium voltage ac (MVAC) SPS will occur when there is a mismatch in mechanical input power and electrical output power. Consequently, not only sensitive loads might be tripped offline, but also the system-wide instability of SPS might occur [3].