Print Email Facebook Twitter Optimal Power Flow Control in Parallel Operating AC and DC Distribution Links Title Optimal Power Flow Control in Parallel Operating AC and DC Distribution Links Author Shekhar, A. (TU Delft DC systems, Energy conversion & Storage) Soeiro, Thiago B. (TU Delft DC systems, Energy conversion & Storage) Wu, Y. (TU Delft DC systems, Energy conversion & Storage) Bauer, P. (TU Delft DC systems, Energy conversion & Storage) Date 2021-02 Abstract DC links with back to back voltage source converters are usually built alongside the existing medium voltage ac distribution grids for infrastructure reinforcement. The distribution network operators need to run multiple of such parallel ac and dc links between two substations at optimal efficiency. This article shows that the active power steering capability of the dc link can be used to dynamically vary the share of power flow in the ac link such that the system operating efficiency is maximized for varying power demand, grid voltage, dc-link voltage, converter efficiency, link length, and conductor area. The algorithm developed based on the derived exact and estimated solution for this parallel ac-dc link power sharing ratio is proved through simulations on a 10 kV, 30 MVA system. The concept is validated using experiments on a scale-down lab model. Using case-study with adapted measured substation data of hourly average power demand profile for one year, it is shown that annual energy saving potential in the range of 8-92 MWh can be achieved with varying link length between 10-20 km for 5-20 kV grid voltage and 185-630 mm$^2$ conductor area if the proposed optimal power flow control is used. Subject Embedded dcenergy routerhybridinterlinkmeshedpower redirectionreconfigurablesmart grid To reference this document use: http://resolver.tudelft.nl/uuid:5b364daf-0fc2-4f30-b8bc-d0f03f6df39e DOI https://doi.org/10.1109/TIE.2020.2970675 ISSN 0278-0046 Source IEEE Transactions on Industrial Electronics, 68 (2), 1695-1706 Part of collection Institutional Repository Document type journal article Rights © 2021 A. Shekhar, Thiago B. Soeiro, Y. Wu, P. Bauer Files PDF Journal_on_optimal_power_flow.pdf 1.71 MB Close viewer /islandora/object/uuid:5b364daf-0fc2-4f30-b8bc-d0f03f6df39e/datastream/OBJ/view