Reduction of Graphite Bomb Damages by Considering Power System Stability

Graphite bombs are one of the important threats of power systems. These bombs can create several short circuits on the network elements. Protection system will remove faulted area without human intervention. In fact these systems have to move from one state to another state. Removal of elements from system can change its configuration and may decrease stability margins and affect its control process. This paper first demonstrates a thin coverage on graphite bombs and power system stability concepts. Then a scheme is presented for the Reduction of Graphite Bomb damage by taking into account power system stability. The scheme is based on detection of graphite attack before probabilistic faults on the network and transmission lines elimination to reduce disturbances effect on the network. Finally the presented method on the small section of New England 39_BUS network (one bus & connected lines) has been simulated. Results showed that the method is useful in passive defense against graphite bomb.