A new control strategy for backup protection against cascading outages

In recent years, many wide spread blackouts is caused by mal-operation of the backup protection, which resulted from the overloading of some transmission lines after one faulted transmission line is tripped. This paper gives a new solution to the problem. A new conception of RCTL (relative cluster of the transmission line) is introduced firstly in this paper. Then the method for searching RCTL based on decision tree theory and method for calculating distribution coefficient of RCTL is introduced in detail. Among them the key techniques are emphasized in the paper. A new control strategy for backup protection to prevent cascading outages is proposed. The simulation of CEPRI standard model shows that the new control strategy for backup protection against cascading outages works well. (6 pages)