Inexact Newton Flow Computation Based on Hermitian and Skew-Hermitian Splitting Preconditioners GMRES(m)
Kai Liu, Hongkun Chen, Xiang Tie-yuan, Gao Zhi-xin · Power System Technology · 2009
According to the feature that the correction equation of large-scale power grid is highly sparse, a method for inexact Newton power flow computation based on Hermitian and skew-Hermitian preconditioners is researched. By use of symmetric and skew-Hermitian splitting of matrix, a new type of preconditioner is proposed. Combining the new preconditioner with GMRES(m), both convergency and convergence rate of power flow computation can be improved. Power flow computation results of IEEE 300-bus system show that the proposed algorithm is effective.