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Control of Voltage Source Converters for Power System Applications
Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, Department of Electrical Power Engineering.
2011 (English)MasteroppgaveStudent thesis
Abstract [en]

The research work is aimed on the investigation of possible modeling and control schemes for the dc-link of VSC, with the purpose of identifying the impact of such modeling and control on the dynamics of the conversion system. A system consisting of back-to-back converters with equivalent grid interconnection and source representation is designed in the software PSCAD/EMTDC using a detailed switching model of the inverter and rectifier components. The control technique based on the well-established concept of vector control is implemented. The main task of the master thesis is oriented towards the achievement of more reliable dc-link dynamics with smaller required capacitance. The control algorithm is based on balancing the power between inverter and rectifier through the dc-link with the minimum dc voltage variations. Dc-link voltage regulation is achieved by implementing a control based on the energy stored in the dc-link capacitor. Alignment to a dq synchronous reference frame orientation with PI regulators is used in the control philosophy for decoupling purposes.

Place, publisher, year, edition, pages
Institutt for elkraftteknikk , 2011. , 67 p.
Keyword [no]
ntnudaim:6350, MSELPOWER Master of Science in Electric Power Engineering,
URN: urn:nbn:no:ntnu:diva-14370Local ID: ntnudaim:6350OAI: diva2:452318
Available from: 2011-10-28 Created: 2011-10-28

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