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Operation of a Three-Phase Power Converter Connected to a Distribution System

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5 Author(s)
Pozzebon, G.G. ; Power Process. & Renewable Energy Lab. (LAFAPE), Univ. of Sao Paulo, São Carlos, Brazil ; Goncalves, A.F.Q. ; Pena, G.G. ; Mocambique, N.E.M.
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This paper presents the operation of a distributed generation (DG) system driven by a dc-dc step-up converter and a dc-ac voltage source inverter (VSI) interfaced with the power grid. To create a stable mode when different kinds of loads are connected locally or when working under contingency, the step-up converter must regulate the dc link voltage, allowing the VSI to stabilize its terminal voltage. The power flow between the grid and the DG is controlled by applying a power/voltage method that regulates the amplitude and the displacement of the grid voltage synthesized by the DG, while a phase-locked loop algorithm is used to synchronize the grid and DG. Additionally, a set of simulations are performed independent of the load type or its work regime (whether it is connected to the grid). The effectiveness of the proposed method is evaluated by experimental results.

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Industrial Electronics, IEEE Transactions on  (Volume:60 ,  Issue: 5 )