Browsing by Subject "shipboard power system"
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Item Experimental Test bed to De-Risk the Navy Advanced Development Model(2017-06-15) Strank, S; Feng, X; Gattozzi, A; Wardell, D; Pish, S; Herbst, J; Hebner, R.This paper presents a reduced scale demonstration test-bed at the University of Texas’ Center for Electromechanics (UT-CEM) which is well equipped to support the development and assessment of the anticipated Navy Advanced Development Model (ADM). The subscale ADM test bed builds on collaborative power management experiments conducted as part of the Swampworks Program under the US/UK Project Arrangement as well as non-military applications. The system includes the required variety of sources, loads, and controllers as well as an Opal-RT digital simulator. The test bed architecture is described and the range of investigations that can be carried out on it is highlighted; results of preliminary system simulations and some initial tests are also provided. Subscale ADM experiments conducted on the UT-CEM microgrid can be an important step in the realization of a full-voltage, full-power ADM three-zone demonstrator, providing a test-bed for components, subsystems, controls, and the overall performance of the Medium Voltage Direct Current (MVDC) ship architecture.Item Optimal power generation scheduling of a shipboard power system(IEEE, 2007-05) Wu, W.; Wang, D; Arapostathis, A; Davey, K.This paper studies the optimal power generation scheduling for a shipboard power system. The problem is formulated as a discrete-time Markov Decision Process (MDP). The paper considers the shipboard power system both without any energy storage and with energy storage, and obtains an optimal power generation scheduling for each situation. For the non-storage system, the switch cost during the start-up process is considered. For the system with a storage, a fuel consumption comparison with different energy storage sizes is provided.Item Practical considerations in implementing shipboard power system reconfiguration control schemes(IEEE, 2007-05) Shasteen, M.; Davey, K; Longoria, R; Shutt, W.The goal of an automatically reconfigurable shipboard power system is to prevent self-inflicted damage and to generate and utilize power in an efficient and reliable manner. To achieve this objective, the system must balance response time with decision accuracy. Speed of calculation is achieved by (1) utilizing a more efficient method of calculating optimization parameters and (2) monitoring indicating parameters to decide when to calculate a new system configuration. In addition to these points, recommendations are made regarding methodologies that account for the influence of the gas turbine power plants expected to form the foundation of future electric shipboard power systems.Item Reconfiguration in shipboard power systems(2007-07) Davey, K.; Longoria, R; Shutt, W; Carroll, J; Nagaraj, K; Park, J; Rosenwinkel, T; Wu, W; Arapostathis, A.A shipboard power system is self contained, tightly coupled, and small enough to allow nearly real time state estimation, given the right equivalent circuit representations. Redirecting power flow is the preeminent task of reconfiguration. This redirection should be accomplished in less than two cycles, while never compromising system stability or power delivery to critical loads. These performance objectives can be approached using an equivalent impedance system representation and various optimization procedures. This reconfiguration control approach is demonstrated through a Matlab Simulink© simulation. Additional issues are addressed concerning the proper realization of a reconfigurable power system by incorporating gas turbine status, as well as due consideration for stable and safe transition between different power system states.