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dc.contributor.authorAmy, John Victor
dc.date.accessioned2012-11-29T16:13:44Z
dc.date.available2012-11-29T16:13:44Z
dc.date.issued1992-05
dc.identifier.urihttp://hdl.handle.net/10945/23576
dc.descriptionCIVINS (Civilian Institutions) Thesis documenten_US
dc.description.abstractLarge increases in the complexity of shipboard electric loads as well as development of electric drive, integrated electric drive and pulsed power systems make manifest the present and future importance of naval electric power systems. The most crucial attribute of these systems is their ability to fulfill their function in the presence of "large-signal" perturbations. Fundamental differences between shipboard and commercial electric power systems make all but the most general nonlinear, "large-signal" stability analyses inappropriate for the design and assessment of naval electric power systems. The tightly coupled and compact nature of shipboard systems are best accommodated by composite system stability analyses. Composite system methods, based upon Lyapunov's direct method, require that each component's stability be represented by a Lyapunov function. A new Lyapunov function which is based upon coenergy is developed for 3-phase synchronous machines. This use of coenergy is generalizable to all electromechanical energy conversion devices. The coenergy-based Lyapunov function is implemented as a "stability organ" which generates waveforms at information teirninals of a "device object" in the object oriented simulation environment of WAVESIM. Single generator simulation results are used to acquire a measure of the "over sufficiency" of the coenergy-based Lyapunov function. Some means of combining the components' Lyapunov functions is necessary with composite system stability criterions. To provide the largest stability region in a Lyapunov function convective derivative space, thereby reducing "over sufficiency", a "timevariant weighted-sum" composite system criterion is developed. This criterion is implemented as a "stability demon" "device object" within the WAVESIM environment. The "stability demon" is tested through RLC circuit simulations and a two-generator simulation. The output of the "stability demon" is suitable for use within an overall system stabilising controller.en_US
dc.description.urihttp://archive.org/details/compositesystems1094523576
dc.format.extent213 leavesen_US
dc.language.isoen_US
dc.publisherMonterey California. Naval Postgraduate Schoolen_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.en_US
dc.titleComposite system stability methods applied to advanced shipboard electric power systemsen_US
dc.typeThesisen_US
dc.contributor.corporateMassachusetts Institute of Technology
dc.contributor.departmentNaval Electrical Power Systems
dc.description.funderCIVINSen_US
dc.identifier.oclcocn640371775
etd.thesisdegree.namePh.D. in Naval Electrical Power Systemsen_US
etd.thesisdegree.levelDoctoralen_US
etd.thesisdegree.disciplineNaval Electrical Power Systemsen_US
etd.thesisdegree.grantorMassachusetts Institute of Technologyen_US
dc.description.distributionstatementApproved for public release; distribution is unlimited.


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