关键词: 交通工程, 安全域, 交通网络, 安全评价, 边界距离, 跨学科

Abstract:

Security region of power grid is applied to traffic engineering in an interdisciplinary way. This paper presents the security region of transportation network, which is defined as the set of flow state (operating points) meeting N-1 security in the transportation network. The set has a closed boundary, and the operating points in the boundary meet N-1 security while points out of the boundary. Firstly, this paper defines N-1 security of the transportation systems, which means the road network allows vehicles to reach their destination by other routes and not trapped in the road when a road is blocked. Secondly, it proposes the model for security region, boundary equations. Then, it proposes the method to calculating security boundary distance. Finally, two examples are presented to demonstrate the security of the traffic network, the fact that the security region is not accurately predicted by the simulation of N-1, the degree of security of the boundary distance, and the fact that preventive control scheme can improve the security. The correctness of the above results is verified by the traffic simulation software TransCAD.

Key words: traffic engineering, security region, transportation network, security evolution, boundary distance, interdisciplinary