基于保护脆弱度加权拓扑模型下的电网脆弱性评估

发布时间：2018-05-21 20:03

本文选题：电力系统 + 复杂网络理论　；参考：《中国电机工程学报》2014年04期

【摘要】：电网中存在的某些脆弱环节对系统大停电事故有着重要的影响。为了有效辨识出这些脆弱环节,提出了基于保护脆弱度加权拓扑模型下的脆弱性评估方法。定义了保护配合度、保护故障严重度和保护脆弱度,并以此提出了单元保护脆弱强度的概念,量化了保护装置的脆弱度对电网中单元脆弱性的贡献程度;建立了基于保护脆弱度的拓扑模型,并给出了加权后相应复杂网络参数的定义;由此,提出了结合单元保护脆弱强度与介数的电网脆弱性评估方法。算例结果验证了所提方法在保持复杂网络理论对结构脆弱性有较好辨识效果的基础上,有效地计及了保护装置脆弱性因素对电网脆弱性的影响,提高了脆弱辨识效果和精度,表明该方法简单有效,具有一定的应用前景。
[Abstract]:There are some weak links in the power system which have an important influence on the blackout of the system. In order to identify these vulnerable links effectively, a vulnerability assessment method based on protective vulnerability weighted topological model is proposed. The protection cooperation degree, the protection fault severity and the protection vulnerability are defined, and the concept of the unit protection vulnerability is put forward, and the contribution of the protection device vulnerability to the unit vulnerability in the power network is quantified. A topology model based on protection vulnerability is established, and the definition of weighted complex network parameters is given. The results of an example show that the proposed method can effectively take into account the influence of the vulnerability of the protective device on the vulnerability of the power grid and improve the effectiveness and accuracy of the vulnerability identification on the basis of maintaining the good identification effect of the complex network theory on the structural vulnerability. It shows that this method is simple and effective and has a certain application prospect.
【作者单位】：四川大学电气信息学院;
【分类号】：TM714

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