Multiterminal High-Voltage dc Systems with Series-Parallel Valve Group-Based High-Voltage dc Substations

Conference · Sun Sep 01 00:00:00 EDT 2024

DOI:https://doi.org/10.1109/ECCE55643.2024.10861704· OSTI ID:2573573

Jaldanki, Sreenivasa ^[1]; Debnath, Suman ^[1]

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1. ORNL

To transfer large amount of power over long distances, multiterminal direct current (MTdc) system based on bipole high-voltage direct current (HVdc) technology is a viable option. However, such system results in large dc transmission loss. The same can be reduced by increasing the dc voltage level. This paper introduces a new MTdc system architecture comprising of series (for increasing dc voltage level) and parallel (for increasing dc current capability) connected HVdc converters. The new architecture is compared with the bipole MTdc architecture in terms of equipment needed and dc transmission loss. The control modifications needed for the MTdc system are identified and the performance of the developed control is verified through electromagnetic transient (EMT) simulations.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Electricity Delivery and Energy Reliability (OE); USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 2573573
• Country of Publication: United States
• Language: English