Multicontingency voltage stability monitoring of a power system using an adaptive radial basis function network

This paper proposes a scheme for online voltage stability monitoring for multiple contingencies using an enhanced radial basis function network (RBFN). A single RBFN is used to estimate MW margins for different contingencies. A sequential learning strategy is used along with a regularization technique to design the RBFN and the weights in the output layer are determined by using linear optimization. The proposed network can be adapted with changing operating scenario of the power system. A network pruning strategy is used to limit the growth of the network size due to adaptive training. The proposed scheme is applied on the New England 39-bus power system and the IEEE 118-bus power system.