Small signal stability analysis of power system considering railway traction load access
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(1.Electric Power Research Institute, State Grid Sichuan Electric Power Company,Chengdu 610041,China;2.State Grid Sichuan Electric Power Company, Chengdu 610041,China)

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TM712

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    Abstract:

    With the rapid development of electrified railways, the traction load of electrified railways has become the largest single load in China's power system, but the impact of its load characteristics on the small-signal stability of the power system is still unclear. Therefore, an equivalent mathematical model of the traction load of electrified railways is established, and based on this, a small-signal model of the power system considering the access of traction loads is constructed. Secondly, using eigenvalue analysis methods, the impacts of locomotive speed, locomotive quantity, and the access location and proportion of traction loads on the small-signal stability of the power system are analyzed. Finally, the adjustment range of excitation parameters of synchronous generators is determined through eigenvalue root locus, and the impacts of traction loads before and after access and different traction load parameters on the adjustment range of excitation parameters of the power system are analyzed. The research results indicate that after the access of traction loads, the small-signal stability of the power system decreases, the adjustment range of system excitation parameters shrinks, and the system stability margin reduces.

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姜晓锋,韩晓言,潘鹏宇,陈 刚.考虑铁路牵引负荷接入的电力系统小干扰稳定性分析[J].电力科学与技术学报英文版,2024,39(4):61-69. JIANG Xiaofeng, HAN Xiaoyan, PAN Pengyu, CHEN Gang. Small signal stability analysis of power system considering railway traction load access[J]. Journal of Electric Power Science and Technology,2024,39(4):61-69.

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  • Online: September 10,2024
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