Impact of Statcom on the Interconnection Of Offshore Wind Farms with HVDC Technology
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
The aim of this study is to define the minimum size of Statcom supporting the interconnection of a large offshore wind farm with high voltage direct current line commutated converters (HVDC LCC) and high voltage direct current voltage source converter (HVDC VSC) connected to a power system.
The size of the Statcom is defined by using a simulation model consisting of a wind farm, HVDC LCC based transmission system, HVDC VSC based transmission system, a Statcom and the Cigr� Nordic 32 power system model. Each sub model in the simulation was validated individually. Different simulation cases were used to analyse the impact of Statcom in case of a fault. The different faults (one phase to ground, three phase to ground, line tripping and generator tripping) were applied to the power system for different connection points of the wind farm, i.e. the wind farm was connected to a strong and a weak connection point. The results showed that connecting the wind farm with transmission technology HVDC LCC to the strong point in the power system did not require any Statcom support because the system reached stability after the faults. When connecting the wind farm to the weak point there is a need of Statcom support for the transmission technology HVDC LCC otherwise the power system becomes unstable. Connecting the wind farm to a weak point by using the transmission technology HVDC VSC there was no need of Statcom.
The graph below shows the Statcom size in the HYBRID HVDC (HVDC LCC and Statcom) depending on the rating of the offshore wind farm and the wind farm model.
Place, publisher, year, edition, pages
2006. , 134 p.
EES Examensarbete / Master Thesis, XR-EE-EES-2006:04
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-118930OAI: oai:DiVA.org:kth-118930DiVA: diva2:609104
Master of Science - Electric Power Engineering
Ghandhari, Mehrdad, Professor