Control Aspects of the Brushless Doubly-Fed Machine (Final Report)
- Oregon State Univ., Corvallis, OR (United States)
This report covers the investigations into the control aspects of a variable-speed generation (VSG) system using a brushless double-fed generator excited by a series-resonant converter. The brushless double-fed machine comprises two sets of stator 3-phase systems which are designed with common windings. The rotor is a cage rotor resembling the low-cost and robust squirrel cage of a conventional induction machine. The system was actually designed and set up in the Energy Laboratory of the Department of Electrical and Computer Engineering at Oregon State University. The series-resonant converter designed to achieve effective control for variable-speed generation with the brushless doubly-fed generator was adequate in terms of required time response and regulation as well as in providing for adequate power quality. The three elements of the VSG controller, i.e., voltage or reactive power controller, the efficiency maximizer and the stabilizer, could be designed using conventional microprocessor elements with a processing time well within the time period required for sampling the variables involved with executing the control tasks. The report treats in detail the stability problem encountered in running the machine at certain speed regions, even if requirements for steady-state stability are satisfied. In this unstable region, shut down of the VSG system is necessary unless proper stabilization controls are provided for. The associated measures to be taken are presented.
- Research Organization:
- Oregon State Univ., Corvallis, OR (United States)
- Sponsoring Organization:
- USDOE Bonneville Power Administration (BPA)
- OSTI ID:
- 5909587
- Report Number(s):
- DOE/BP--24332-1; ON: DE91009707
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental evaluation of a variable-speed, doubly-fed wind-power generation system
Investigation of appropriate pole number combinations for brushless doubly fed machines applied to pump drives
Related Subjects
130700* -- Hydro Energy-- Power-Conversion Systems
17 WIND ENERGY
170603 -- Wind Energy Engineering-- Power-Conversion Systems
36 MATERIALS SCIENCE
CONTROL
CONTROL EQUIPMENT
DC TO DC CONVERTERS
DESIGN
DIAGRAMS
DOCUMENT TYPES
ELECTRIC GENERATORS
ELECTRICAL EQUIPMENT
EQUIPMENT
Electric Motors
Brushless
FLOWSHEETS
FUNCTIONS
HYDRAULIC TURBINES
MACHINERY
POWER GENERATION
PROCESS CONTROL
PROGRESS REPORT
RESPONSE FUNCTIONS
ROTORS
SPEED REGULATORS
STABILITY
STATORS
TURBINES
TURBOMACHINERY
VARIATIONS
VELOCITY
VOLTAGE REGULATORS
Variable Speed Drives
WIND TURBINES