Enlarged operational area of an Interline DC power Flow controller via adaptive droop control for Multi-Terminal HVDC systems

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Pourmirasghariyan, Mirhamed and Gharehpetian, G. B. and Gomis-Bellmunt, Oriol and Campos-Gaona, David and Papadopoulos, Panagiotis N. (2025) Enlarged operational area of an Interline DC power Flow controller via adaptive droop control for Multi-Terminal HVDC systems. International Journal of Electrical Power and Energy Systems, 164. 110430. ISSN 0142-0615 (https://doi.org/10.1016/j.ijepes.2024.110430)

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Abstract

The effective performance of Interline DC Power Flow Controllers (IDC-PFCs) in Modular Multilevel Converters (MMC)-based High Voltage Direct Current (HVDC) grids is restricted by 1) the current limitation of the HVDC cables/lines, 2) the HVDC buses’ DC voltages and 3) the IDC-PFC capacitor’s DC voltage limit. The pivotal remedy for this issue is to utilize an adaptive droop control for the MMCs that varies its droop gain to maximize the IDC-PFC operation range. In this paper, 3D curves of the IDC-PFC’s important characteristics are used to assess the flexibility of the IDC-PFC control. By using this approach, a new degree of freedom for IDC-PFC controllability is achieved. The performance of the optimal-adaptive-droop-controlled strategy presented in this paper is validated using power flow studies. The results demonstrate that a wider operational area is conceivable for the IDC-PFC when this technique is applied as a combination of MMC converters’ droop control and IDC-PFC duty cycle.

ORCID iDs

Pourmirasghariyan, Mirhamed, Gharehpetian, G. B., Gomis-Bellmunt, Oriol, Campos-Gaona, David ORCID logoORCID: https://orcid.org/0000-0002-0347-6288 and Papadopoulos, Panagiotis N.;
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