Comparison of current control structures for three-phase four-wire systems in natural frame

Konferenz: PCIM Europe 2019 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
07.05.2019 - 09.05.2019 in Nürnberg, Deutschland

Tagungsband: PCIM Europe 2019

Seiten: 7Sprache: EnglischTyp: PDF

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Tejero Revelles, Alejandro; Steinhart, Heinrich (Aalen University of Applied Sciences, Germany)

The paper presents a comparison between two current control structures in natural frame. The proposed methods were applied to a three-phase four-wire grid-connected voltage source inverter (VSI). The compared control structures are a proportional-integral (PI) controller, and a proportional-resonant (PR) controller, which is based on second order generalized integrators (SOGI). For sinusoidal references, PI controllers present steady-state error. In order to overcome this issue and to reduce the harmonic distortion, an integral predictive control (IPC) was implemented. The results will highlight the performance differences based on steady-state error, transient behaviour and harmonics compensation.