Physical dynamic simulation of shipboard power system components in a distributed computational environment

Abstract

Abed, Nagy Youssef, "Physical dynamic simulation of shipboard power system components in a distributed computational environment" (2007 In order to perform system studies in such an environment physical phase variable models of different components of the shipboard power system were developed using operational parameters obtained from finite element (FE) analysis.These models were developed for two types of studies low and high frequency studies. Low frequency studies are used to examine the shipboard power systems v behavior under load switching, and faults. High-frequency studies were used to predict abnormal conditions due to overvoltage, and components harmonic behavior. Different experiments were conducted to validate the developed models. The Simulation and experiment results show excellent agreement.The shipboard power systems components behavior under internal faults was investigated using FE analysis. This developed technique is very curial in the Shipboard power systems faults detection due to the lack of comprehensive fault test databases.A wavelet based methodology for feature extraction of the shipboard power systems current signals was developed for harmonic and fault diagnosis studies.This modeling methodology can be utilized to evaluate and predicate the NPS components future behavior in the design stage which will reduce the development cycles, cut overall cost, prevent failures, and test each subsystem exhaustively before integrating it into the system.

Development of Physics-based Models and Design Optimization of Power Electronic Conversion Systems

“…Electromagnetic compatibility (EMC) is becoming an important issue in the design of modern power electronics systems [1,2]. In conventional design methodologies, EMC issues are addressed only after a prototype is built.…”

“…Solving a full wave Maxwell equation enables us to maps the electromagnetic behavior of arbitrary 3D layouts and geometries into an equivalent network of lumped circuit components. Theoretically, this method gives an accurate result from DC up to the highest frequencies [1,2].…”

“…It consists of the low frequency model developed earlier [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] with a lumped high frequency branch connected in parallel. The parameters required for modeling the low frequency model are calculated by nonlinear finite element solutions.…”

“…The circuit equations are usually solved by loop currents or nodal voltages. However, most of the formulations combine both approaches to result in minimum number of unknowns [1,2].…”

“…This work develops detailed and accurate model for different power system components operating in their practical environments. The physics-based model would help predict undesirable effects in the design of power conversion system and propose improvement strategies for its efficiency and reliability [1,2].…”