Impact Analysis of Effective Inertia Competition on Power System Inter-Area Damping Characteristics

Abstract:

In allusion to the discrepancies of the equivalent generator's equivalent inertia based on mechanical inertia time constant and that of the power system under practical operations, the concept of effective inertia is proposed. By analyzing a two-generator system, the main factors influencing the dominant mode damping ratio of inter-area oscillation, besides the supplementary damping control, are analyzed as the three: effective inertia, load level and network structure. When the former two are constant, the crucial factor for dynamic stability reducing in terms of operation mode change can be ascribed to the effective inertia competition. Practical calculation of Gansu power grid simulation is conducted and the result of argument is verified.

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 870-876
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.870
• Online since: August 2013
• Authors: Cong Liu*, Wen Ying Liu, Wei Zheng, Chen Liang
• Keywords: Damping Characteristics, Effective Inertia Competition, Inter-Area Power Oscillation, New Energy Power Generation Units, Operation Mode

References

[1] Xiaoxin Zhou, Zhihua He, Zuping Zhang. Analysis of Power System Damping Characteristics and Low Frequency Oscillation Phenomenon[J]. Power System Technology, 1984, Z1: 1-11(In Chinese).

[2] Hanqi Huang. Research on Small-signal Stability of Wind and Photovoltaic Power Generation System[D]. Huazhong University of Science & Technology, 2012(In Chinese).

[3] Yingduo Han, Jianfeng Yan, Xiaorong Xie, Lili Li. Research on the Identification of Dominant Dynamic Parameters of Power System[J]. Proceedings of the CSEE, 2006, (02): 1-6(In Chinese).

[4] Kundur P. Power system stability and control[M]. New York：McGraw-Hill Inc, 1994.

[5] Yixin Ni, Shousun Chen, Baolin Zhang. Theory and Analysis of Dynamic Power System[M]. Tsinghua University Press, 2002: 260-346(In Chinese).

[6] Zanxun Shen. Coherent Generator Groups Identification and Its Dynamic Equivalent in Online Computing of Complex Power System Transient Stability[C]. Selected Papers of Computer Online Application, Institute of Electrical Engineering of Dalian City, 1982(In Chinese).