双馈感应风机控制环节对电力系统机电小干扰稳定的影响分析

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Abstract The high proportion of wind power grid-connected makes the traditional power system are increasingly transforming into power electronics systems. The analysis and control research of electromechanical small-signal stability of power system as affected by control-links of doubly-fed induction generator (DFIG) becomes increasingly important. In this paper, a small-signal stability model considering the dynamic characteristics of the rotor-side converter of the DFIG is established. Through the combination of eigenvalue analysis and time domain simulation, the effects of DFIG participation in system oscillation and various control links inside the rotor-side on small disturbance stability are studied in order to judge the main control-link that affects the stability of the system. On this basis, power system stabilizers are added to different control links for comparison and verification, which provides a reasonable basis for the additional position of damping control. Based on the simulation example analysis of a four-machine two-region interconnected power system, it is shown that the influence of the control-link on the electromechanical time-scale on the small disturbance stability is more obvious than the non-electromechanical scale control-link. Adding power system stabilizers in this kind of control link is more helpful to improve small-signal stability of the power system.

Key words： doubly fed induction generator (DFIG) power system small-signal stability wind power generation

Received: 14 February 2019 Published: 12 September 2019

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	Articles by authors
	Wang Ye
	Xu Maoda
	Hao Wenbo
	Liu Cheng
	Chen Xiaojie

Cite this article:

Wang Ye,Xu Maoda,Hao Wenbo等. Analysis of electromechanical small-signal stability of power system as affected by control-links of doubly fed induction generator[J]. Electrical Engineering, 2019, 20(9): 31-38.

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http://dqjs.cesmedia.cn/EN/Y2019/V20/I9/31

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