CAJ | 학술논문

电力系统在遭受大干扰后失稳的后果非常严重，甚至是灾难性的，从暂态稳定方面分析系统的脆弱性具有重大的研究价值。采用暂态能量函数，结合暂态稳定分析中数值仿真法和直接法两种基本方法，同时考虑预想事故概率，从暂态稳定安全角度快速、定量评估电力系统的脆弱性。基于事故概率与暂态能量裕度构建相关脆弱度指标，并根据临界机群状态以修正暂态动能，改进不同事故下系统脆弱性的评估精度，同时确定系统的薄弱环节。通过对IEEE 5机14节点系统的仿真，验证了该方法的合理性与有效性。
전력계통재조수대간우후실은적후과비상엄중，심지시재난성적，종잠태은정방면분석계통적취약성구유중대적연구개치。채용잠태능량함수，결합잠태은정분석중수치방진법화직접법량충기본방법，동시고필예상사고개솔，종잠태은정안전각도쾌속、정량평고전력계통적취약성。기우사고개솔여잠태능량유도구건상관취약도지표，병근거림계궤군상태이수정잠태동능，개진불동사고하계통취약성적평고정도，동시학정계통적박약배절。통과대IEEE 5궤14절점계통적방진，험증료해방법적합이성여유효성。
losing stabilityThe consequences of power system by being subjected to large disturbance are very serious and even disastrous, so analyzing vulnerability of power system from the viewpoint of transient stability is extraordinarily valuable. This paper evaluates the vulnerability of power system from the viewpoint of transient stability safety quickly and quantitatively based on the transient energy function, combining the time simulation method and the direct method which are the two main methods of transient stability analysis, and at the same time considering the occurrence probability of contingency. It constructs correlative vulnerability index based on the probability of contingencies and transient energy margin, and revises transient kinetic energy based on the condition of critical cluster for improving the evaluation precision of vulnerability of power system under different contingencies and confirming the weak links of power system. Simulations of this method in IEEE 14-bus system demonstrate its rationality and effectiveness.