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Transactions: WSEAS TRANSACTIONS ON POWER SYSTEMS
Transactions ID Number: 32-105
Full Name: Mohamed EL-Shimy
Position: Assistant Professor
Age: ON
Sex: Male
Address: 1 EL-Sarayat St. Abassia, Cairo
Country: EGYPT
Tel: 0020105639589
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Fax:
E-mail address: ShimyMB@yahoo.com
Other E-mails: MBekhet@ecemail.uwaterloo.ca
Title of the Paper: steady state modeling and analysis of DFIG for variable-speed variable-pitch wind turbines
Authors as they appear in the Paper: Mohamed EL-Shimy
Email addresses of all the authors: ShimyMB@yahoo.com, MBekhet@ecemail.uwaterloo.ca
Number of paper pages: 11
Abstract: Abstract: - Due to its advantages, doubly-fed induction generator (DFIG) based variable-speed wind turbines (VSWT) are recently the most widely used topology of wind energy conversion systems (WECS). This paper provides a steady-state modeling and analysis of DFIG systems. A steady-state model for DFIG is derived based on wound-rotor induction machine 3rd order model with stator flux-oriented control scheme. This model is used for steady-state performance analysis of DFIG system connected directly to infinite bus considering optimal operation through following of the maximum power tracking characteristics. A fundamental steady-state stability criteria based on DFIG power-slip characteristics is used to study the steady-state stability of the system considering the entire maximum power-tracking characteristics. Also, the solo effect of the rotor voltage dq-components on the doubly fed induction machine (DFIM) steady-state performance and stability is analyzed. The !
results illustrate the steady-state stability limitations, as well as causes of steady-state instabilities of DFIG system as affected by the stator power demanded and the rotor-impressed variables. Moreover, DFIG rotor-speed range limitation causes and indicators that hinder steady-state stability are assessed. Therefore, the presented work is valuable for steady-state operation management of DFIG systems.
Keywords: Wind energy, Wind turbines, Induction machine, DFIG, Stator flux-oriented control, Steady-state stability, Maximum power tracking
EXTENSION of the file: .pdf
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