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Decentralized synchronization of an inverter based grid


J.-S. Brouillon

Semester Thesis, SS17

Historically, the power grid was composed of high inertia electro-mechanical generators, which are connected on a network of current lines that can be modelled as a connected, undirected graph. A controller is acting on these generators so that the power is transmitted between them in order to provide power to their respective distribution networks. With the emergence of renewable energies, a lot of generators need nowadays DC to AC conversion. It can be done by an electronic power inverter, which has a low inertia. This new model of the power grid causes two problems: control must be decentralized, and as the inertia dropped, the line dynamics are not negligible.
Colombino [2] studies a controller that provides synchronization with negative Laplacian feedback, in addition with a phase-lock and a magnitude decentralized controller. Using singular perturbation [1], he proves that these controllers achieve the intended goal while making the assumption that the lines are algebraic. Using the same methods, the main goal of this report is to determine the stability and impulse response of the system when line dynamics are present on the network. An alternative solution is also presented and compared to this first one.
This first part will set up the model and state the assumptions. Section 2 studies the controller presented above, while Section 3 proposes an interesting alternative, then another on the second. Finally, section 4 will comment on the results and the simulations.

Supervisors: Marcello Colombino, Florian Dörfler


Type of Publication:

(13)Semester/Bachelor Thesis

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% Autogenerated BibTeX entry
@PhdThesis { Xxx:2017:IFA_5664
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