IDA-PBC Controller Design for Grid Connected Front End Converters under Non-ideal Grid Conditions

FEDERICO M. SERRA; CRISTIAN H. DE ANGELO

ELECTRIC POWER SYSTEMS RESEARCH

ELSEVIER SCIENCE SA

Lugar: Amsterdam; Año: 2017

0378-7796

A passivity-based non-linear controller design for three-phase front-end converters used to connect renewable energy sources to the grid is proposed inthis paper. The control objective is to inject all the generated power to thegrid, while adjusting the reactive power exchanged with the power system.Besides, generated currents must have very low distortion, in order to satisfythe standards, even when grid voltages are distorted or unbalanced. Theproposed controller is first designed using the Interconnection and Damping Assignment strategy, which allows obtaining controller parameters whileensuring the closed-loop system stability. In order to ensure that the output currents have very low harmonic distortion, the obtained control lawsare modified based on the fundamental positive sequence grid voltage, obtained from a positive sequence detector. The proposal allows controllingboth injected powers and DC-link voltage, from a unique controller design.Simulation and experimental results are presented to validate the proposedcontroller.