Abstract
Analysis of cascading failure mechanism in power grid was presented based on electric betweenness, in which relationship among electric betweenness of nodes, connective loss and transmission capability of power system was studied especially. Whereafter, generated betweenness was introduced to make active defence against the cascading failure. Academic analysis shows the presented method is more reasonable in power system than existed models because it is based on Kirchhoff's law rather than supposing power flow being transferred only along the shortest path. Numeric example of IEEE 39-bus system shows faults of single node can cause cascading failure easily when the threshold of electric betweenness in power system is low, while such risk is reduced partially by improving of the threshold. However, the system is still vulnerable even with high threshold but under fault of nodes with high electric betweenness. Moreover, it shows the cascading failure is restrained remarkably by intentional removal of very few nodes according to their generated betweenness when original fault occurs. Corresponding conclusions were also confirmed by the analysis of China Northwest system.
| Original language | English |
|---|---|
| Pages (from-to) | 61-68 |
| Number of pages | 8 |
| Journal | Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering |
| Volume | 30 |
| Issue number | 13 |
| State | Published - 5 May 2010 |
Keywords
- Active defence
- Cascading failure mechanism
- Complex network
- Electric betweenness
- Power system reliability