The invention provides an urban road network cascade failure load redistribution method, the method is characterized by comprising the following steps: 1, initializing a directed weighted network, anddetermining the traffic capacity of all edges in the network; 2, investigating initial loads of all edges in the network, and calculating initial weights of all the edges by utilizing a BPR function;3, selecting one edge from the network as a failure edge at the moment t, and obtaining a load on the failure edge; 4, distributing the load on the failure edge to an adjacent edge at the moment t+1;5, calculating the load of the adjacent edge at the t+1 moment, and judging whether each adjacent edge is in a supersaturated state or not at the t+1 moment, if the loads of all the adjacent edges are smaller than the maximum traffic capacity of each adjacent edge, terminating cascading failure, and otherwise, repeating the step 4 until the loads of all the adjacent edges are smaller than the traffic capacity of the adjacent edges. According to the method, the directionality and road section impedance of urban road traffic are considered, and a weighted directed urban road traffic network topology network diagram is constructed.
本发明提供一种城市路网级联失效负载再分配方法,其特征在于,包括如下步骤:步骤一、初始化有向加权网络,确定网络中所有边的通行能力;步骤二、调查网络中所有边的初始负载,利用BPR函数计算各边的初始权重;步骤三、在t时刻从网络中选取一条边作为失效边,获得失效边上的负载;步骤四、在t+1时刻,将失效边上的负载分配至相邻边上;步骤五、计算相邻边t+1时刻的负载;判断在t+1时刻各相邻边是否处于过饱和状态,若所有相邻边的负载小于各相邻边的最大通行能力,则级联失效终止,否则重复步骤四直至所有相邻边的负载小于其通行能力。本发明考虑了城市道路交通的有向性及路段阻抗,构建了一个加权有向的城市道路交通网络拓扑网络图。
Urban road network cascade failure load redistribution method
城市路网级联失效负载再分配方法
2020-05-19
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / G06Q Datenverarbeitungssysteme oder -verfahren, besonders angepasst an verwaltungstechnische, geschäftliche, finanzielle oder betriebswirtschaftliche Zwecke, sowie an geschäftsbezogene Überwachungs- oder Voraussagezwecke , DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTING PURPOSES |
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