Parameter Identification of DFIG Based on Trajectory Characteristic Analysis

doi:10.11930/j.issn.1004-9649.2013.7.100.4

Abstract

Abstract: When investigating dynamic operating characteristics of power systems with large scale wind power integration, accurate models for structures and parameters of wind power generators are needed. Based on system identification theory, the transfer function of the double-fed induction generators (DFIG ) is derived, then the relationship between the unknown parameters and the transfer function system is constructed to analyze the identifiability of the DFIG’s parameters. The equivalent transform of reduced dimension is imposed on the DFIG-integrated system, and by analyzing the dominant image trajectory characteristics, the index of trajectory difference degree is proposed, which can be designed as an objective function to optimize the solutions to DFIG reactor parameters. Finally, some simulations are conducted with consideration of different line faults and changes in wind speed to further validate the effectiveness and feasibility of the proposed method of parameter identification for DFIGs.

Key words: double-fed induction generator (DFIG), stability calculation, trajectory characteristics, parameter identification

CLC Number:

TM614

FU Rong, SUN Wan-peng. Parameter Identification of DFIG Based on Trajectory Characteristic Analysis[J]. Electric Power, 2013, 46(7): 100-104.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2013.7.100.4

https://www.electricpower.com.cn/EN/Y2013/V46/I7/100

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