Sun, Pingyang, Li, Gen, Zhang, Hanwen, Liang, Jun  ORCID: https://orcid.org/0000-0001-7511-449X and Konstantinou, Georgios
2026.
Analytical calculation models for bipolar MMC-HVDC systems under valve-side single-phase-to-ground faults.
Presented at: 2026 IEEE PES International Meeting (PES IM),
Hong Kong, Hong Kong,
18-21 January 2026.
Proceedings of 2026 IEEE PES International Meeting (PES IM).
IEEE,
10.1109/pesim67009.2026.11438378
|
Abstract
This paper proposes two analytical valve-side single-phase-to-ground (SPG) fault calculation models for bipolar modular multilevel converter-based high-voltage direct current (MMC-HVDC) system. The first model is applicable to the half-bridge submodule (HBSM) configuration, and the second is suitable for the full-bridge submodules (FBSMs) or hybrid SMs with different FBSM ratios. In each calculation model, two post-fault equivalent MMC circuits are established following converter blocking for the independent study of the upper and lower arms. The detailed expression of the post-fault voltages and currents in each arm, valve-side, and grid-side are obtained from the proposed calculation models. Moreover, the applicability of the calculation models for solid, inductive, and resistive dc-grounding methods is also demonstrated, along with a further discussion on the influence of MMC arm/grid-side resistance as well as varying fault-grounding impedance. Multiple bipolar MMC-HVDC systems, incorporating HBSM, FBSM, and hybrid SM configurations, are developed in PSCAD/EMTDC to validate the accuracy of the proposed analytical calculation models.
| Item Type: | Conference or Workshop Item - published (Paper) |
|---|---|
| Date Type: | Published Online |
| Status: | In Press |
| Schools: | Schools > Engineering |
| Publisher: | IEEE |
| ISBN: | 9798331566456 |
| Last Modified: | 30 Mar 2026 12:00 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/186090 |
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