Questions to prepare for the wind energy exam
Document task 2011/12 - EEA08, KIA-EEA07
Matriculation: EEE
Winter semester
Lecture: 1.33 SWS (total of 10 lectures)
Seminar: 0.67 SWS (total of 5 seminars)
Final performance: Examination (PK 120) 50% on the subject area
Admission requirement for the examination :
Literature list
Publication ETZ issue 7/2005 "Double-fed asynchronous generators up to 5.6 MW for wind energy"
6 Wind turbines
6.1 Introduction/overview/literature
6.2 Wind turbines after the amendment of the EEG
6.3 Structure of wind turbines
6.3.1 Efficiency of wind rotors
6.3.2 Wind turbine
a) Height profile and axial force - calculation
b) Height profile and pitching moment - calculation
6.3.3 Rotor blade pitch
6.4 Operating point of wind turbines
6.4.5 Efficiency and power flow
6.4.6 Operating point of the turbine
6.5 Mechanical drive train of wind turbines
7 Generator systems in wind turbines
7.0 Current-voltage characteristics of electric drives (repetition)
7.1 Direct grid connection
7.2 Grid-connected converters
7.3 Grid connection with self-commutated pulse inverters/pulse inverters
7.4 Direct converters
7.5 Double-fed three-phase asynchronous machine
7.5.1 Basic principle/mode of operation
7.5.2 Rotor-fed three-phase commutator machine
7.5.3 Structure of the power electronics and energy flows
7.5.4 Equivalent circuit diagram, pointer diagram, characteristic curve field
7.5.5 Analytical considerations with stator-side coupling factor
7.5.6 Analytical considerations with short-circuit variables
7.6 High-pole synchronous generators
7 .7 Comparison and evaluation of the generator concepts