The power flow algorithm for balanced and unbalanced bipolar multiterminal ac-dc systems

Bipolar dc terminals are used for hvdc transmission in an ac-dc system. The sequential ac-dc power flow algorithm has been proposed for an ac-dc system consisting of balanced and unbalanced bipolar multiterminal in this paper. The algorithm has two superiority. Firstly, as dc system variables are not included in Jacobian matrix the convergence time of the algorithm and necessity of computer memory is little. Secondly, both this algorithm has been developed for (balanced and unbalanced) bipolar system (not only monopolar) and this algorithm also can be run with current controlled, voltage controlled and power controlled terminals without making any changes in proposed method. (C) 2002 Elsevier Science B.V. All rights reserved.