Model Predictive Control of LC-Filtered Voltage Source Inverters with Optimal Switching Sequence

Changming Zheng, Tomislav Dragicevic, Zhenbin Zhang, Jose Rodriguez, Frede Blaabjerg

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Voltage source inverters with output LC filter enable a sinusoidal output voltage with low harmonics, suitable for islanded ac microgrid or uninterruptible power supply applications. Conventional finite-set model predictive voltage control (MPVC) applies only a single switching vector per control period, leading to a variable switching frequency and significant output ripple. This article resolves these issues by proposing an improved MPVC with optimal switching sequence (OSS-MPVC). First, an improved vector switching sequence is defined, aiming to reduce the output-voltage ripple with a constant switching frequency. Then, to tackle the difficulty in extending the OSS to high-order systems due to the coupling effect of the output filter, a generalized 'one-step estimation' solution is proposed, which directly associates the control-variable gradients with the vector switching sequence. To further enhance the output-voltage tracking accuracy, intersample dynamics are taken into account in the cost function. The control delay and dead-time compensation are also considered. Simulations and experimental results verify the feasibility of the proposed method.

Idioma originalInglés
Número de artículo9165198
Páginas (desde-hasta)3422-3436
Número de páginas15
PublicaciónIEEE Transactions on Power Electronics
Volumen36
N.º3
DOI
EstadoPublicada - mar 2021

Áreas temáticas de ASJC Scopus

  • Ingeniería eléctrica y electrónica

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