Title :
Power Control of Direct Drive Wind Turbine with Simplified Conversion Stage & Transformerless Grid Interface
Author :
Parker, M.A. ; Ng, C.H. ; Ran, L. ; Tavner, P. ; Spooner, E.
Author_Institution :
Durham Univ.
Abstract :
The paper presents an analysis and simulation study of the power extraction capability of a direct drive wind turbine realised using a modular permanent magnet generator connected to the 11 kV grid via a cascaded multilevel voltage source inverter (CMVSI) without an interface transformer. The DC link in each of the CMVSI modules is supplied by a pair of generator coils connected through uncontrolled bridge rectifiers. The DC link voltage is determined by the required real and reactive power output to the grid, which constrains the available speed range of the turbine, limiting the power extraction at low wind speeds
Keywords :
invertors; machine control; permanent magnet generators; power control; power grids; wind turbines; 11 kV; CMVSI; cascaded multilevel voltage source inverter; direct drive wind turbine; permanent magnet generator; power control; power extraction; transformerless grid interface; Analytical models; DC generators; Inverters; Magnetic analysis; Mesh generation; Permanent magnets; Power control; Power generation; Wind energy generation; Wind turbines;
Conference_Titel :
Universities Power Engineering Conference, 2006. UPEC '06. Proceedings of the 41st International
Conference_Location :
Newcastle upon Tyne
Print_ISBN :
978-186135-342-9
DOI :
10.1109/UPEC.2006.367716
