Due to the physical structure characteristics of the generator

it cannot be operated in some parts of the output interval

which is also named as generator prohibited zones. If these prohibited zones are not considered in the security-constrained optimal power flow

the corrective output of generators after line fault may not eliminate the overloads in time. Therefore

the model of security-constrained optimal power flow with the consideration of generator prohibited zones is proposed. As a large-scale mixed integer linear programming model

the proposed model is hard to be directly solved. Benders decomposition is used to decouple the proposed model into the optimal power flow master problem and the short-term and long-term N-1 fault correcting subproblems. The non-convex mixed integer sub-problem is reformulated into a linear optimal subproblem by fixing the binary variable

which can return the corresponding valid Benders cuts to the master problem. Test results on a 6-bus system and IEEE RTS-96 system verify the efficiency of the model and algorithm proposed.