CAJ | 학술논문

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。
다중우동하적전망저빈진탕연구시판단호련대전망동태은정성적중요의거。결합화중전망“6.17”금죽산사건，통과사고분석급출다중우동적개념，인위다중우동시인발호련대전망저빈진탕사고적일개중요인소。이사고련방법위례，모의전망선로고장、조류전이、선로상계과재저일전형적우동서렬，분석과구전망재다중우동하적공솔진탕정황，연구운행방식대과구전망은정성적영향，결과표명모일지구전망운행방식적개변대해지구전망화여지상련적전망은정성균유중요영향，감우차，제출료통과감공사고련조성배절적발생서렬여전망박약배절진행저빈진탕사고예방적방법，위전망규화、조도운행제공료삼고의거。
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 discovers 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 given power grid and another power gird which is connected to it. So the paper proposes a method by monitoring the occurrence sequences of the fault chains and the weak links to prevent low frequency oscillation which can provide the basis for power grid planning and dispatching operation.