Date Added: Mar 2012
In a smart grid, the strong coupling between cyber and physical operations makes power systems vulnerable to cyber attacks. Changing the traditional structure of power systems and integrating communication devices are beneficial for better monitoring and decision making by System Operators but increases the chance of being maliciously attacked. The communication links can be hacked so that the attacker can alter the power flow and power injection measurements, which are used to estimate the states of power system. In this paper, the authors formulate an attack strategy that can change the congestion of transmission lines without being detectable.