Enlarged operational area of an Interline DC power Flow controller via adaptive droop control for Multi-Terminal HVDC systems
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 volt...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | International Journal of Electrical Power & Energy Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061524006549 |
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| Summary: | 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. |
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| ISSN: | 0142-0615 |