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Once part or whole of the power system is exposed to some dangerous situations, e.g., malicious terrorist attacks or extreme weather conditions, the potential cascading failure is a severe threat to the power system. However, some feasible prevention control strategies can be used to enhance the system robust to cope with the impact of cascading failure. This paper proposed a chance constraint based...
Cascading failure is the main cause of blackouts in recent years. Modeling and feature analysis of cascading failure are quite important to power system security. This paper proposed a novel cascading failure simulation model based on a platform on which frequency dynamics and power flow distribution can be calculated jointly. Compared with the ones usually used nowadays, i.e. OPA model and Manchester...
Investigation of the cascading failure is of great importance to understanding wide-scale power outages in electrical grids. In the current literature, researchers mainly evaluate the severity of a cascading failure process based on assessing its final damage, e.g., blackout size, to the grid. Generally speaking, the larger the final damage value is, the more severe the cascading process is. However,...
The vulnerability analysis is vital for safely running power grids. The simultaneous attack, which applies multiple failures simultaneously, does not consider the time domain in applying failures, and is limited to find unknown vulnerabilities of power grid networks. In this paper, we discover a new attack scenario, called the sequential attack, in which the failures of multiple network components...
Electric grid is one of the largest interconnected networks on the earth, and is vital to the operation of modern society. Within recent decades, the occurrence of several large scale power blackouts raised many concerns from different aspects. For example, the most recent India power blackout in July 2012 affected 620 Million people. Investigating the vulnerability of electric grids becomes increasingly...
Security issues in complex systems such as power grid, communication network, Internet, among others have attracted wide attention from academic, government and industry. In this paper, we investigate the vulnerabilities of power grid under a topology-based network model in the context of cascading failures caused by physical attacks against substations and transmission lines. In particular, we develop...
The power grid networks are vulnerable to various attacks which may lead to cascading failures. Severe cascading failures can cause large scale power outage and preventing them is believed to be one of the greatest challenges in power grid systems. In this paper, we study cascading failures using the Bay Area power grid data. We adopt two topology based models, which describe the definition of load...
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