Title :
Analysis of bipolar-6-phase-transmission system with option of 4-phase-operation for large scale wind farms
Author :
van de Sandt, R. ; Brakelmann, H. ; Erlich, I.
Author_Institution :
IW/EAN, Univ. Duisburg-Essen, Duisburg
Abstract :
This Paper presents the power system behavior of a bipolar 6-phase system. It is designed for connecting large scale offshore wind farms (OWFs) to the onshore grid. The 6-phase bipolar system fulfills the strict German environmental requirements concerning the surrounding magnetic field on high voltage transmission links through the North Sea. Further befit results from the option of switching the six phase system following cable faults to a symmetrical four phase system. It offers a continuous transmission capacity of 67 % of the design value if only one string is affected. Unbalanced interim states are, as shown in the paper, acceptable for the connected wind farm as well as the high voltage grid for a limited time duration.
Keywords :
environmental factors; offshore installations; power grids; wind power plants; 4-phase-operation; North Sea; bipolar-6-phase-transmission system; cable faults; continuous transmission capacity; environmental requirements; high voltage grid; high voltage transmission links; large scale offshore wind farms; six phase system; surrounding magnetic field; symmetrical four phase system; Circuit faults; Joining processes; Large-scale systems; Magnetic cores; Magnetic fields; Power cables; Power system transients; Power systems; Voltage control; Wind farms; Four Phase Transmission; Network Analysis; Offshore; Power Systems; Six Phase Transmission System; Wind Energy;
Conference_Titel :
Power and Energy Conference, 2008. PECon 2008. IEEE 2nd International
Conference_Location :
Johor Bahru
Print_ISBN :
978-1-4244-2404-7
Electronic_ISBN :
978-1-4244-2405-4
DOI :
10.1109/PECON.2008.4762456
