Analysis of Doubly-Fed Induction Generator Driven by Wind Turbine Using Real Time Digital Simulator

Satish Choudhury ； Kanungo Barada Mohanty

《International Journal of Energy Science》 1卷3期 (2011/11) Pp. 180-185

並列摘要

Doubly-fed Induction Generator (DFIG) is the most common rotatory machine which is used on the grid connected wind energy conversion system for the fulfillment of the system requirement such as grid stability, fault ride through (FRT), power quality improvement, and grid synchronization and power control etc. Though the requirements are not fulfilled directly by the machine rather the control strategy is used in both the stator as well as rotor side along with converters to fulfill the requirements stated above. To satisfy the grid code requirements of wind turbine, usually grid side converter is playing a major role. So in order to improve the operation capacity of wind turbine under critical situation, the intensive study of both machine side converter control and grid side converter control is necessary. The machine uses two back-to-back converters. The grid side converter is modeled to control the active and reactive power independently along with dc-link voltage. The machine side converter is modeled to control the reactive power of the machine and maintain the speed constant irrespective of the transient behavior of the grid. In this paper the performance of the DFIG system is analyzed under grid voltage fluctuation and the theoretical results are obtained from the MATLAB/ SIMULINK environment. The proposed work is also validated experimentally using RT-LAB.

並列關鍵字

Doubly-fed Induction Generator (DFIG) ； Vector control ； PWM Converter ； Grid-side converter ； Machine-side converter ； RT-LAB