A Nonlinear Optimization Technique Applied to PWM Signals

Obadowski, V. N.; Lerm, A.A.P.; Ciarelli, Wagner de-Freitas

doi:10.1109/andescon.2012.16

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B Microsource Modeling1

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2014

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“…This inverter is composed by IGBT modules connected in an H-bridge configuration. These modules are switched by an optimized PWM (OPWM) scheme as suggested in [6]. The fires angles obtained from this modulation technique are obtained through an optimization technique that minimizes an objective function related to the resulting total harmonic distortion (THD) of the resulting voltage waveform.…”

Section: B Microsource Modelingmentioning

confidence: 99%

Synchronizing microgrids to the utility through a series compensator

Lerm

Braatz

Cruz

et al. 2014

2014 Power Systems Computation Conference

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This paper presents a novel approach to deal with the synchronization of microgrids to the main grid. It is based on the use of a power electronic device derived from the original concept of the SSSC (Static Synchronous Series Compensator). The proposed scheme considers the connection of this device at the point-of-interconnection (POI) of the microgrid to the low voltage side of the substation transformer (main grid). The voltage originated by the series compensator is fully controlled in both amplitude and phase angle ensuring the conditions for the synchronization. The proposed scheme allows a smooth transition between the islanded operation and the grid connected operation overcoming typical problems observed when conventional methods are applied. Numerical results obtained for a hypothetical microgrid show the effectiveness of the proposed approach.

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Section: B Microsource Modelingmentioning

confidence: 99%