On the impact index of synchronous generator displaced by DFIG on power system small-signal stability

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Bi, J.T.^1 ; Du, W.J.^1 ; Wang, H.F.^1 ; Song, Y.T.^2 ; Wang, Q.^2 ; Ding, J.^2 ; Chen, D.Z.^2 ; Wei, W.^3

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, China^1

China Electric Power Research Institute, Beijing, China^2

Sichuan Electric Power Research Institute, Chengdu, Sichuan, China^3

关键词: Dynamic impacts;    Dynamic interaction;    Oscillation mode;    Power system oscillations;    Power system small signal stability;    Sensitivity indices;    Urgent problems;    Wind power technology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012089/pdf
DOI  :  10.1088/1757-899X/199/1/012089

来源: IOP

【 摘 要 】

As the maturity of wind power technology and the ageing and retirement of conventional synchronous generators, the displacement of synchronous generators by wind power generators would be a trend in the next few decades. The power system small-signal angular stability caused by the displacement is an urgent problem to be studied. The displacement of the SG by the DFIG includes withdrawing the dynamic interactions of the displaced SG and adding the dynamic interactions of the displacing DFIG. Based on this fact, a new index is proposed to predict the impact of the SG to be displaced by the DFIG on power system oscillation modes. The sensitivity index of the oscillation modes to the constant inertia of the displaced SGs, proposed in early literatures to estimate the dynamic impact of the SG being displaced by the DFIG, is also compared with the proposed index. The modified New England power system is adopted to show various results and conclusions. The proposed index can correctly identify the most dangerous and beneficial displacement to power system small-signal angular stability, and is very useful in practical applications.