Research on Parameter Stability Region of Governor System

Abstract:

The root-locus technique in automatic control theory was applied to study the effect of power-frequency control system parameter on power system dynamic stability. The one machine infinite bus system model with power-frequency control system was established and the corresponding root-locus equation was deduced. The parameter stability region of power-frequency control system to ensure the power system dynamic stability was achieved through drawing root locus graphs of different system running modes. If the gain value of power-frequency control system is higher than the critical value, power system low frequency oscillation will occur. The above conclusion was validated by time domain simulation results.

• Periodical: Advanced Materials Research (Volumes 1008-1009)
• Pages: 445-449
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1008-1009.445
• Online since: August 2014
• Authors: Hong Jie Weng, Yan Hui Xu, Zhen Zhen Wang*
• Keywords: Governor System, Low Frequency Oscillation (LFO), Parameter Stability, Power System

References

[1] ZHAO Yi, LU Chao, LIU Yongjun, et al. Wide-area generator supplementary damping controller design based on residue and identification methods, Power System Protection and Control, 2012, 40(19): 1-6.

DOI: 10.1109/isgt.2012.6175639

[2] DeMello F P, Concordia. Concept of synchronous machine stability as affected by excitation control[J]．IEEE Trans. On PAS, 1969, 88(4): 316-329.

DOI: 10.1109/tpas.1969.292452

[3] Magdy M A, Coowar F. Frequency domain analysis of power system forced oscillations [J]. IEE Proceedings, 1990, 7: 261-268.

DOI: 10.1049/ip-c.1990.0035

[4] WANG Tieqiang, HE Renmu, WANG Weiguo, et al. The mechanism study of low frequency oscillation in power system [J]. Proceedings of the CSEE, 2002, 22(2): 21-25.

[5] HAN Zhiyong, HE Renmu, XU Yanhui. Power system low frequency oscillation of resonance mechanism induced by turbo-pressure pulsation [J]. Proceedings of the CSEE, 2005, 25(21): 14-18.

DOI: 10.1109/drpt.2008.4523581

[6] XU Yan-hui, HE Renmu, HAN Zhiyong．The cause analysis of turbine power disturbance inducing power system low frequency oscillation of resonance mechanism[J]. Proceedings of the CSEE, 2007, 27(17): 83-87.

[7] WANG Guanhong, TAO Xiangyu, LI Wenfeng, et al. Influence of turbine governor on power system dynamic stability [J]. Proceedings of the CSEE, 2007, 27(17): 83-87.