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Subject Area

Electrical Engineering

Article Type

Original Study

Abstract

In the recent years, the mathematical planning model of transmission networks based on full AC load flow has been developed. But, due to the model non-convexity and the existing of large number of local solutions, this model can only be used for small size networks as it consumes large unreasonable computation time in addition to its incapability to yield global solution in most cases. To overcome these problems, two new iterative solution procedures have been presented in this paper. In the first one, the objective function is changed to the minimization of the number of new lines required to satisfy the constrained equations. In each following iteration, the cost constraint is added to the set of constraints where the lines to be selected should have a cost less than the cost of lines selected in the previous iteration. In the second method, a number of lines is to be selected to feed, in steps, the maximum amount of load till the full load is fed. Then, a set of lines is to be deleted from the selected lines and, at the same time, another set of lines is to be added from the set of unselected lines to decrease the cost in an iterative manner. The verification of the new methods is made using a 19-bus transmission networks.

Keywords

Economic transmission planning, Mixed integer nonlinear programming technique, AC load flow

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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