PLL design for inverter grid connection: Simulations for ideal and non-ideal grid conditions
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
In this report a phase locked loop (PLL) system for grid voltage phase tracking has been investigated. The grid voltage phase angle contains critical information for connecting a power plant, such as a wave energy converter, to the grid. A synchronous reference frame PLL system with PI-regulator gains calculated with the symmetrical optimum method has been designed and simulations in SIMULINK have been made. For ideal grid conditions the phase angle was tracked fast and accurate. For non-ideal conditions the phase angle was tracked but with less accuracy, due to slow dynamics of the system, but still within acceptable margins. In order to test this system further it has to be implemented in a control system and tested when connected to the grid.
Place, publisher, year, edition, pages
2010. , 43 p.
TVE, 11 008
PLL, inverter, Phase locked loop, symmetrical optimum method
Other Engineering and Technologies
IdentifiersURN: urn:nbn:se:uu:diva-156145OAI: oai:DiVA.org:uu-156145DiVA: diva2:430787
Master Programme in Engineering Physics
2011-06-01, Å2002, Lägerhyddsvägen 1, UPPSALA, 15:00 (English)
Ekström, Rickard, Phd student
Lundin, Urban, Teknologie doktorBergkvist, Mikael, Teknologie doktor