PROJECT TITLE :

A Suboptimal Power-Point-Tracking-Based Primary Frequency Response Strategy for DFIGs in Hybrid Remote Area Power Supply Systems

ABSTRACT:

Thanks to the presence of an influence electronic converter, the doubly fed induction generator (DFIG)-based wind generators are isolated from grid frequency variations, which can impose vital burden on conventional generators to regulate frequency in a very hybrid remote space power offer (RAPS) system. Therefore, participation of wind generators in frequency control is increasingly demanded. In this paper, a primary frequency response strategy is proposed for the DFIG to manage the RAPS system frequency. A droop control loop without conventionally used high-pass filter is integrated to come up with the torque reference for the DFIG to produce primary frequency response, and a supplementary control loop is proposed to reinforce the primary frequency response with torque feedback control. Furthermore, the instructed suboptimal power point tracking strategy is capable of reserving wind power to improve the frequency response. The proposed strategy enables DFIG to participate in RAPS system frequency regulation while alleviating high rate of modification of power and therefore stress on the diesel generators under highly variable load demand. The effectiveness of the proposed strategy is validated through simulations.