多重扰动下的跨区电网低频振荡研究-电工技术学报.PDFVIP

20 14 年 2 月 电 工 技 术 学 报 Vol.29 No. 2 第29 卷第2 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Feb . 2014 多重扰动下的跨区电网低频振荡研究 陈恩泽,刘涤尘,廖清芬,张洁琼 （武汉大学电气工程学院 武汉 430072 ） 摘要 多重扰动下的电网低频振荡研究是判断互联大电网动态稳定性的重要依据。结合华中 电网“6.17 ”金竹山事件，通过事故分析给出多重扰动的概念，认为多重扰动是引发互联大电网 低频振荡事故的一个重要因素。以事故链方法为例，模拟电网线路故障、潮流转移、线路相继过 载这一典型的扰动序列，分析跨区电网在多重扰动下的功率振荡情况，研究运行方式对跨区电网 稳定性的影响，结果表明某一地区电网运行方式的改变对该地区电网和与之相连的电网稳定性均 有重要影响，鉴于此，提出了通过监控事故链组成环节的发生序列与电网薄弱环节进行低频振荡 事故预防的方法，为电网规划、调度运行提供了参考依据。 关键词：多重扰动 跨区电网 低频振荡 事故链 中图分类号：TM712 Research on Low Frequency Oscillation of Interconnected Power Grid Based on Multiple Disturbances Chen Enze, Liu Dichen, Liao Qingfen, Zhang Jieqiong （Wuhan University Wuhan 430072 China ） Abstract Research on low frequency oscillation of power grid based on multiple disturbances is the important basis to determine the dynamic stability of interconnected power grid. The paper proposed the concept of multiple disturbances based on the analysis of the power oscillation event happened in Central China Grid, and discover s that multiple disturbances are the important factor to cause low frequency oscillation. The fault chains method can simulate a typical disturbance sequence of flow transferring and overload of transmission lines caused by line faults . It was chosen to analysis power oscillations in interconnected power grid under multiple disturbances. The influence of operation modes on interconnected power grid is studied. The results show that the change of operation modes of the given power grid has a great impact on both the giv