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Solution des systèmes de contrôle de grandes dimensions basée sur les boucles de rétroaction dans la simulation des réseaux électriques
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mugombozi, Chuma Francis |
| Copyright Year | 2013 |
| Abstract | RESUME La production de l'energie electrique, tout comme son transport et son utilisation, exige des systemes de controle complexes afin de reguler la puissance et la frequence. Ces systemes de controle doivent tenir compte, entre autres, de nouvelles sources d'energie telles que l'energie eolienne et de nouvelles technologies de lien d'interconnexion en courant continu a haute tension. Ces systemes de controle doivent etre capables de controler l'atteinte des consignes de puissance et de frequence tout en tenant compte des changements dans la dynamique de la source d'energie ainsi que des defauts et evenements divers affectant le comportement du reseau electrique. Ce comportement doit etre etudie, en particulier, dans les scenarios ou les changements generent des transitoires electromagnetiques. Dans ces conditions, le niveau de details exige par les modeles a pour consequence d'augmenter la complexite des systemes de controle. Par ailleurs, pendant la conception du reseau, pour des tests de calibration d'equipement ou meme en phase d'exploitation du reseau, peuvent etre requis des outils d'aide a la decision pour les ingenieurs, tels que l'estimation de l'energie dissipee dans les parafoudres. Ces outils utilisent les donnees generees par la simulation. Ils comportent des fonctions complexes, necessitant parfois une solution numerique. Ces fonctions sont associees aux systemes de controle dans les programmes de simulation. La simulation sur ordinateur evolue par ailleurs dans un contexte de developpement des controleurs numeriques, d'algorithmes de calcul parallele ou distribue et d'outils informatiques, notamment, de la technologie a multiprocesseurs. Dans ce contexte, il est indique de proposer des ameliorations continues au niveau du solveur des equations de controle modelisant ces systemes. Cette these vise a ameliorer la solution des systemes de controle. Plus specifiquement, elle vise a reduire le temps de simulation du reseau avec ses systemes de controle, tout en maintenant la precision requise pour l'analyse de phenomenes transitoires electromagnetiques.----------ABSTRACTThe generation of electrical energy, as well as its transportation and consumption, requires complex control systems for the regulation of power and frequency. These control systems must take into account, among others, new energy sources such as wind energy and new technologies for interconnection by high voltage DC link. These control systems must be able to monitor and achieve such regulation in accordance with the dynamics of the energy source, faults and other events which may induce transients phenomena into the power network. Such transients conditions have to be analyzed using the most accurate and detailed hence, complex models of control system. In addition, in the feasibility study phase, the calibration or the setup of equipment as well as in the operation of the power network, one may require decision aid tools for engineers. This includes, for instance, knowledge of energy dissipated into the arresters in transient analysis. These tools use simulation programs data as inputs and may require that complex functions be solved with numerical methods. These functions are part of control system in computer simulator. Moreover, the simulation evolves in a broader context of the development of digital controller, distributed and parallel high performance computing and rapid evolutions in computer (multiprocessor) technology. In such context, a continuing improvement of the control equations solver is welcomed. This thesis aims to contribute to enhance the accuracy and efficiency in computation of control system equations in electromagnetic transients type simulation methods. Control systems are modelled using ax=b simultaneous system of equations. These equations are sometimes non-linear with feedback loops and thus require iterative Newton methods, including the formation of a Jacobian matrix and ordering as well as processing by graph theory tools. The proposed approach is based on the formulation of a reduced rank Jacobian matrix. The dimension is reduced up to the count of feedback loops. With this new approach, gains in computation speed are expected without compromising its accuracy when compared to classical full rank Jacobian matrix representation. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://publications.polymtl.ca/1235/1/2013_ChumaFrancisMugombozi.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
