<\/p>\n
Commande par inversion de l\u2019acc\u00e9l\u00e9rateur de particule Proton Synchrotron<\/span><\/strong><\/p>\n mardi 16 juin 2026 \u00e0 9h00 R\u00e9sum\u00e9<\/span><\/strong><\/p>\n Les acc\u00e9l\u00e9rateurs de particules n\u00e9cessitent des convertisseurs performants pour g\u00e9n\u00e9rer des champs magn\u00e9tiques pr\u00e9cis permettant le contr\u00f4le du faisceau de particules. Dans les synchrotrons tels que le Proton Synchrotron au CERN, ces convertisseurs doivent fournir des profils de champs magn\u00e9tiques dynamiques avec une pr\u00e9cision extr\u00eame tout en g\u00e9rant de grandes quantit\u00e9s d\u2019\u00e9nergie. Le Proton Synchrotron utilise un convertisseur de puissance multi-\u00e9tage puls\u00e9, nomm\u00e9 POPS, con\u00e7u pour r\u00e9pondre \u00e0 ces exigences. Son contr\u00f4le est particuli\u00e8rement complexe en raison des couplages entre les sous-syst\u00e8mes, des contraintes de pr\u00e9cision strictes et de la n\u00e9cessit\u00e9 d\u2019assurer une stabilit\u00e9 des variables internes. Cette th\u00e8se concerne l\u2019application d\u2019une commande par inversion, d\u00e9riv\u00e9e de la Repr\u00e9sentation \u00c9nerg\u00e9tique Macroscopique (REM) du POPS. L\u2019objectif est de d\u00e9velopper une structure de commande flexible capable d\u2019assurer un suivi pr\u00e9cis du champ magn\u00e9tique tout en g\u00e9rant les flux d\u2019\u00e9nergie internes et en maintenant la stabilit\u00e9 du syst\u00e8me. Cette flexibilit\u00e9 est indispensable aux extensions futures du POPS. Un mod\u00e8le d\u00e9taill\u00e9 du POPS est d\u2019abord d\u00e9velopp\u00e9 et organis\u00e9 \u00e0 l\u2019aide du formalisme REM, en partant d\u2019un convertisseur unitaire et en l\u2019\u00e9tendant \u00e0 l\u2019ensemble du syst\u00e8me multi-convertisseurs. Cette approche de mod\u00e9lisation met en \u00e9vidence les \u00e9changes d\u2019\u00e9nergie et la causalit\u00e9 du syst\u00e8me, offrant une base solide pour la conception de la commande. \u00c0 partir de cette repr\u00e9sentation, une commande par inversion en est syst\u00e9matiquement d\u00e9duite. La strat\u00e9gie de commande propos\u00e9e est valid\u00e9e par simulation, d\u00e9montrant sa capacit\u00e9 \u00e0 atteindre une grande pr\u00e9cision de suivi de r\u00e9f\u00e9rence (de l\u2019ordre de la centaine de ppm, partie par million), \u00e0 r\u00e9guler les tensions des condensateurs et \u00e0 contr\u00f4ler les courants internes. Une validation exp\u00e9rimentale est r\u00e9alis\u00e9e sur une plateforme \u00e0 \u00e9chelle r\u00e9duite, confirmant la faisabilit\u00e9 et la robustesse de l\u2019approche et son impl\u00e9mentation en temps r\u00e9el. Les r\u00e9sultats montrent que la commande par inversion constitue une alternative interpr\u00e9table et flexible compar\u00e9 \u00e0 la commande initiale RST, avec un potentiel pour les syst\u00e8mes d\u2019\u00e9lectronique de puissance complexes. Ce travail contribue au d\u00e9veloppement de strat\u00e9gies de commande avanc\u00e9es pour les convertisseurs de puissance des acc\u00e9l\u00e9rateurs de particules et contribue aux futures \u00e9volutions du POPS ainsi que les acc\u00e9l\u00e9rateurs de nouvelle g\u00e9n\u00e9ration.<\/p>\n Mots-cl\u00e9s<\/span><\/strong><\/p>\n Acc\u00e9l\u00e9rateurs, M\u00e9thodes de contr\u00f4le pour syst\u00e8mes \u00e9lectriques, Contr\u00f4le num\u00e9rique<\/p>\n Abstract<\/span><\/strong><\/p>\n Particle accelerators rely on high-performance power converters to generate precise magnetic fields for beam control. In synchrotron machines such as the Proton Synchrotron at CERN. These converters must deliver high-dynamic magnetic fields profiles with extreme accuracy while managing large amounts of energy. The POwer converter for Proton Synchrotron (POPS) is a pulsed power supply system designed to meet these requirements by combining capacitive energy storage with multi-stage power conversion. Its control is particularly challenging due to strong coupling between subsystems, stringent precision constraints, and the need to ensure stable operation under varying conditions. This PhD investigates the application of inversion-based control derived from Energetic Macroscopic Representation to the POPS system. The objective is to develop a flexible control structure capable of ensuring accurate magnetic field tracking while managing internal energy flows and maintaining system balance. This flexibility is required for future extensions of POPS. A detailed model of the POPS architecture is first developed and organized using the EMR formalism, starting from a unitary converter and extending to the complete multi-converter system. This model organization highlights energy exchanges and system causality, providing a clear framework for control design. Based on this representation, an inversion-based control structure is systematically derived. The proposed control strategy is validated through simulation, demonstrating its ability to achieve high tracking accuracy, regulate capacitor voltages, and control internal currents. An experimental validation is carried out on a reduced-scale platform, confirming the feasibility and robustness of the approach in real-time. The results show that inversion-based control offers a transparent and flexible alternative to the initial RST control, with strong potential for complex power electronic systems. This work contributes to the development of advanced control strategies for accelerator power converters and supports future evolutions of the POPS system and next-generation accelerator infrastructures.<\/p>\n <\/p>\n<\/div>\n <\/p>\n","protected":false},"excerpt":{"rendered":" Commande par inversion de l\u2019acc\u00e9l\u00e9rateur de particule Proton Synchrotron mardi 16 juin 2026 \u00e0 9h00 B\u00e2timent ESPRIT, Amphith\u00e9\u00e2tre Atrium R\u00e9sum\u00e9 Les acc\u00e9l\u00e9rateurs de particules n\u00e9cessitent des convertisseurs performants pour g\u00e9n\u00e9rer des champs magn\u00e9tiques pr\u00e9cis permettant le contr\u00f4le du faisceau de particules. Dans les synchrotrons tels que le Proton Synchrotron au CERN, ces convertisseurs doivent […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,3],"tags":[],"class_list":["post-9164","post","type-post","status-publish","format-standard","hentry","category-commande","category-southese"],"_links":{"self":[{"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/posts\/9164","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/comments?post=9164"}],"version-history":[{"count":1,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/posts\/9164\/revisions"}],"predecessor-version":[{"id":9165,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/posts\/9164\/revisions\/9165"}],"wp:attachment":[{"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/media?parent=9164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/categories?post=9164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/l2ep.univ-lille.fr\/en\/wp-json\/wp\/v2\/tags?post=9164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nB\u00e2timent ESPRIT, Amphith\u00e9\u00e2tre Atrium<\/p>\n