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《Proceedings of the Chinese Society of Universities for Electric Power System and its Automation》 2009-05
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Vectorization Primal-dual Interior Point Implementation of Optimal Power Flow

QIN Zhi-jun (College of Electrical Engineering,Guangxi University,Nanning 530004,China)  
Vectorization technology is used to improve the efficiency of optimal power flow(OPF) implementation.The vectorization expression of OPF is established by arranging the control variables and state variables according to the variable type.In solving the OPF model with primal-dual interior point method,the gradient matrix and the vectorization expression of Hessian matrices linear combination are setup.The coefficient matrix of correction equation is dealt approximately;hence correction equation can be solved by LDL T decomposition.Approximate minimum degree(AMD) reordering algorithm is used to reduce the fill-in elements in LDL T decomposition.The power system vectorization calculation library is developed based on C/C++.The dynamic sparse storage strategy in this library is utilized to improve calculation speed.Numerical simulations on test systems confirm that vectorization simplifies the OPF implementation and saves execution time.
【CateGory Index】: TM711
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