Conceptual survey of generators and power electronics for wind turbines Adgangsmade: Internet

Report outline......Page 9
State of the art......Page 10
Concepts and wind turbine configurations......Page 11
Market aspects......Page 16
Trends in wind turbine design......Page 18
The Asynchronous Machine (Induction Machine)......Page 21
Squirrel Cage Induction Generator......Page 22
Wound rotor Induction Generator......Page 23
Operational Characteristics – Normal Duty......Page 24
Efficiency of Induction Generators as a Function of Load and Speed......Page 25
The Permanent Magnet Generator......Page 26
Voltage Regulation......Page 28
Torus......Page 29
Doubly salient Permanent Magnet Generator (DSPMG)......Page 30
Methods of Analysis of PMG......Page 31
Cylindrical air-gap with outer rotor......Page 32
Stator wound without teeth......Page 33
Magnetic Circuit......Page 34
Efficiency of Permanent Magnet Generators as a Function of Load and Speed......Page 35
Conclusion on PMG......Page 36
The Switched Reluctance Generator......Page 37
Operational Characteristics – Normal Duty......Page 38
Axial Flux Machines......Page 39
Efficiency of the SRG as a Function of Load and Speed......Page 40
The Transverse Flux machine......Page 41
Reported machine type designs......Page 42
TFPM basic design......Page 43
Force production and calculation......Page 45
The Wound Rotor Generator......Page 46
Description......Page 47
The High Voltage Machine......Page 50
Trends and perspectives......Page 52
Soft starter......Page 56
Capacitor bank......Page 57
Advantages related to the use of the back-to-back PWM-VSI......Page 58
Tandem converter......Page 59
Advantages in the use of the Tandem Converter......Page 60
Matrix converter......Page 61
Disadvantages and problems of the matrix converter......Page 62
Multilevel Converter......Page 63
Advantages in the use of the multilevel converter......Page 64
Resonant converter......Page 65
The commutation process for the NCC.......Page 66
Disadvantages of the NCC......Page 67
Comparison of the five frequency converters......Page 68
Reactive power compensation units......Page 69
Power regulation and storage units......Page 70
HVDC......Page 71
Trends and perspectives......Page 73
Grid Generics and Main Focus......Page 75
Power Quality and other Demands to Grid Connection......Page 76
Categorisation and characterisation of disturbances in the grid......Page 77
Equipment used to enhance the Power Quality.......Page 80
Continuously controllable apparatus......Page 81
Measures and indicators......Page 83
Basic grid properties......Page 86
Stiff or weak grid......Page 87
Off-shore wind farms on the transmission grid......Page 88
Power system integration......Page 89
Summary......Page 92