Finite Set Model Predictive Current Control of a Grid Converter Equipped with an LCL Filter

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.advisor Song, Zhanfeng Suman, Rishi 2017-04-13T10:22:56Z 2017-04-13T10:22:56Z 2017-03-13
dc.description.abstract A grid converter is a critical component used to synchronize a renewable energy source with the utility grid and are also used as an active front-end rectifier for motor drives. Converter switching actions produce harmonics and therefore, it is equipped with an LCL filter to feed smooth sinusoidal current to the grid. However, the resonance behaviour of LCL filter amplifies the harmonics appearing at its resonant frequencies, therefore resonance damping is necessary. This thesis proposes a current controller based upon finite set model predictive control for current tracking and active damping of the LCL filter resonance. The current prediction for the controller is done in a small horizon window and the possibility to extend it to longer horizon has been explored. A hold equivalent discrete-time model with zero-order-hold assumption is used by the controller for predicting current for future time instants using the present state measurement. The current controller also uses an observer to enhance its disturbance rejection capability and reduce the need of additional sensors required to run the controller. The dynamic performance and robustness of the finite set model predictive current controller is demonstrated through simulation results. en
dc.format.extent 8+51
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.title Finite Set Model Predictive Current Control of a Grid Converter Equipped with an LCL Filter en
dc.type G2 Pro gradu, diplomityö fi Sähkötekniikan korkeakoulu fi
dc.subject.keyword Current controller en
dc.subject.keyword disturbance rejection en
dc.subject.keyword finite set en
dc.subject.keyword LCL filter en
dc.subject.keyword observer en
dc.subject.keyword resonance damping en
dc.identifier.urn URN:NBN:fi:aalto-201704133565
dc.programme.major Electrical drives fi
dc.programme.mcode ELEC3024 fi
dc.type.ontasot Master's thesis en
dc.type.ontasot Diplomityö fi
dc.contributor.supervisor Hinkkanen, Marko
dc.programme AEE - Master’s Programme in Automation and Electrical Engineering (TS2013) fi
dc.ethesisid Aalto 8542
dc.location P1 fi

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