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This paper demonstrates the analysis of novel methodology developed to select optimal buses for installation of convertor stations in the hybrid voltage source converter based high voltage direct current system. Here, a modified unified optimal power flow model is developed for the optimal power flow problem and solved using the particle swarm optimization technique for the voltage source converter-based high voltage direct current network. The analysis has been performed for optimizing the various techno-economic objective functions, including generation cost, voltage deviation, and total power system losses, for better power system operation. The developed unified optimal power flow model's effectiveness and methodology for deciding the high voltage direct current converter’s optimal location are examined, with several tests performed with modified five-bus and IEEE-30 bus system. The impact of high voltage direct current line replacement is decided based on optimal results obtained for selected techno-economic objective functions by replacing each AC line with high voltage direct current independently. The obtained results have proved the voltage source converter-high voltage direct current controller’s impact on optimization of generation cost, voltage deviation, and total power system losses.
Cite this article as: S. Agrawal, P. Kundu. “Techno-economic Unified OPF Modeling for VSC-HVDC Converter Installation”, Electrica, vol. 21, no. 3, pp. 352-365, Sep. 2021.