DC-Link Stress Analysis for the Grid Connection of Point Absorber Type Wave Energy Converters
2015 (English)Conference paper, Presentation (Refereed)
Highly random nature of input power from wave energy converters (WEC), especially from direct-driven point absorbers, demands customized power electronic converters for grid connection. In this paper, analysis and comparison of the DC-link stresses in the converter systems for two cases - a single and three collective units, of wave energy converters is given. The AC/DC/AC converter system includes a conventional uncontrolled three phase rectifier, a DC/DC converter to boost the DC-link voltage and an inverter with RL load. The system has been studied under two different controller actions for the DC/DC converter: with constant boost factor and with constant DC-link voltage. A Proportional Integral controller has been used to regulate the voltage in the latter case. Matlab/Simulink based system simulation has been done to compare the DC-link stress. The analysis shows the comparison in DC-link stresses and the requirements of the system for different cases, proving the advantages and the importance of having customized active power conversion methods for minimizing the DC-link stresses.
Place, publisher, year, edition, pages
2015. 61-66 p.
DC-link stress analysis; harmonic distortion; passive rectifier; wave energy converter
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-258208DOI: 10.1109/ICCEP.2015.7177601ISI: 000380609800010ISBN: 9781479987047OAI: oai:DiVA.org:uu-258208DiVA: diva2:841225
5th International Conference on Clean Electrical Power (ICCEP)
FunderSweGRIDS - Swedish Centre for Smart Grids and Energy Storage