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000210782 001__ 210782 000210782 005__ 20181007231334.0 000210782 0247_ $$2doi$$a10.5075/epfl-thesis-6613 000210782 02470 $$2urn$$aurn:nbn:ch:bel-epfl-thesis6613-7 000210782 02471 $$2nebis$$a10498649 000210782 037__ $$aTHESIS_LIB 000210782 041__ $$aeng 000210782 088__ $$a6613 000210782 245__ $$aA mixed-signal computer architecture and its application to power system problems 000210782 260__ $$aLausanne$$bEPFL$$c2015 000210782 269__ $$a2015 000210782 300__ $$a244 000210782 336__ $$aTheses 000210782 502__ $$aDr Jean-Michel Sallese (président) ; Prof. Maher Kayal, Dr Sidi-Rachid Cherkaoui (directeurs) ; Prof. Mario Paolone, Prof. Thierry Van Cutsem, Prof. Alkiviadis Hatzopoulos (rapporteurs) 000210782 520__ $$aRadical changes are taking place in the landscape of modern power systems. This massive shift in the way the system is designed and operated has been termed the advent of the ``smart grid''. One of its implications is a strong market pull for faster power system analysis computing. This work is concerned in particular with transient simulation, which is one of the most demanding power system analyses. This refers to the imitation of the operation of the real-world system over time, for time scales that cover the majority of slow electromechanical transient phenomena. The general mathematical formulation of the simulation problem includes a set of non-linear differential algebraic equations (DAEs). In the algebraic part of this set, heavy linear algebra computations are included, which are related to the admittance matrix of the topology. These computations are a critical factor to the overall performance of a transient simulator. This work proposes the use of analog electronic computing as a means of exceeding the performance barriers of conventional digital computers for the linear algebra operations. Analog computing is integrated in the frame of a power system transient simulator yielding significant computational performance benefits to the latter. Two hybrid, analog and digital computers are presented. The first prototype has been implemented using reconfigurable hardware. In its core, analog computing is used for linear algebra operations, while pipelined digital resources on a field programmable gate array (FPGA) handle all remaining computations. The properties of the analog hardware are thoroughly examined, with special attention to accuracy and timing. The application of the platform to the transient analysis of power system dynamics showed a speedup of two orders of magnitude against conventional software solutions. The second prototype is proposed as a future conceptual architecture that would overcome the limitations of the already implemented hardware, while retaining its virtues. The design space of this future architecture has been thoroughly explored, with the help of a software emulator. For one possible suggested implementation, speedups of four orders of magnitude against software solvers have been observed for the linear algebra operations. 000210782 6531_ $$aanalog computing 000210782 6531_ $$areconfigurable computing 000210782 6531_ $$acomputer accelerator architectures 000210782 6531_ $$ahigh performance computing 000210782 6531_ $$apower system simulations 000210782 6531_ $$apower system dynamics 000210782 6531_ $$anumerical linear algebra 000210782 700__ $$0244592$$aKyriakidis, Theodoros$$g198375 000210782 720_2 $$0240539$$aKayal, Maher$$edir.$$g105540 000210782 720_2 $$0242729$$aCherkaoui, Sidi-Rachid$$edir.$$g104759 000210782 8564_ $$s14362227$$uhttps://infoscience.epfl.ch/record/210782/files/EPFL_TH6613.pdf$$yn/a$$zn/a 000210782 909CO $$ooai:infoscience.tind.io:210782$$pthesis$$pDOI$$qDOI2$$qthesis-bn2018 000210782 917Z8 $$x108898 000210782 917Z8 $$x108898 000210782 917Z8 $$x108898 000210782 918__ $$aSTI$$cIEL$$dEDEE 000210782 919__ $$aGR-KA 000210782 920__ $$a2015-9-4$$b2015 000210782 970__ $$a6613/THESES 000210782 973__ $$aEPFL$$sPUBLISHED 000210782 980__ $$aTHESIS