XU Hao,GAN Deqiang,HUANG Run,et al.Parameter Tuning Method for Power System Stabilizer Based on Minimum Characteristic Locus[J].Automation of Electric Power Systems,2023,47(5):134-143.
XU Hao,GAN Deqiang,HUANG Run,et al.Parameter Tuning Method for Power System Stabilizer Based on Minimum Characteristic Locus[J].Automation of Electric Power Systems,2023,47(5):134-143. DOI: 10.7500/AEPS20220406003.
Parameter Tuning Method for Power System Stabilizer Based on Minimum Characteristic Locus
The occurrence of low-frequency and ultra-low-frequency oscillations in power systems will threaten the secure and stable operation of power grids. The parameter setting of the power system controllers directly affects the small-signal stability of low-frequency and ultra-low-frequency oscillations. To analyze the influence of controller parameters on stability
a small-signal stability analysis approach based on the minimum characteristic locus from a frequency-domain perspective is proposed. First
a compact form of the Heffron-Phillips model of the rotor circuit is established
and the stability margin expression in the frequency domain is obtained according to the characteristic locus. Then
the sensitivity analysis of the stability margin is implemented
and the quantitative analysis of the influence of parameters on the stability is realized. In addition
the exciter mode is analyzed and the reason why the PSS gain has the upper bound is explained from the theory aspect based on this method
and the solution equations of the frequency of exciter mode and the critical gain of the power system stabilizer are given. Finally
a controller parameter tuning method is proposed
and the effectiveness and practicability of the proposed method are verified by case studies.
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