Title :
Direct power control with referenced torque and reactive power of Doubly Fed Induction Machine connected to unbalanced grid
Author :
Pura, Piotr ; Iwanski, Grzegorz
Author_Institution :
Inst. of Control & Ind. Electron., Warsaw Univ. of Technol., Warsaw, Poland
Abstract :
Doubly-Fed Induction Machine (DFIM) still remains one of the most popular type of generation unit used in wind power conversion systems, due to variable-speed operation, price and reduced power of its bi-directional power converter. However, the machine connected to power grid is very sensitive to voltage unbalance. High DC-link voltage is required during unbalanced grid operation mode in order to sustain system stability. Without robust control excessive pulsation of electromagnetic torque occurs. This paper presents an effective and simple control of DFIM connected to unbalanced grid. The control is based on the simple direct power algorithm (DPC) with hysteresis controllers and does not require voltage and current decomposition into positive and negative sequence.
Keywords :
asynchronous machines; electric power generation; power control; power conversion; power grids; reactive power; torque; wind power; DC-link voltage; DFIM; DPC; bidirectional power converter; current decomposition; direct power algorithm; direct power control; doubly fed induction machine; electromagnetic torque; generation unit; hysteresis controller; positive-negative sequence; reactive power; referenced torque; unbalanced grid; variable-speed operation; voltage decomposition; wind power conversion systems; Electromagnetics; Oscillators; Rotors; Stator windings; Torque; Vectors; DFIM; DPC; assymetric voltage; direct power control; doubly-fed induction generator; torque pulsation;
Conference_Titel :
Ecological Vehicles and Renewable Energies (EVER), 2014 Ninth International Conference on
Conference_Location :
Monte-Carlo
Print_ISBN :
978-1-4799-3786-8
DOI :
10.1109/EVER.2014.6844011
