ANN-based robust DC fault protection algorithm for MMC high-voltage direct current grids
Xiang, Wang and Yang, Saizhao and Wen, Jinyu (2019) ANN-based robust DC fault protection algorithm for MMC high-voltage direct current grids. IET Renewable Power Generation. ISSN 1752-1416 (https://doi.org/10.1049/iet-rpg.2019.0733)
Preview |
Text.
Filename: Xiang_etal_RPG_2020_ANN_based_robust_DC_fault_protection_algorithm_for_MMC_high_voltage_direct_current_grids.pdf
Accepted Author Manuscript Download (1MB)| Preview |
Abstract
Fast and reliable protection is a significant technical challenge in modular multilevel converter (MMC) based DC grids. The existing fault detection methods suffer from the difficulty in setting protective thresholds, incomplete function, insensitivity to high resistance faults and vulnerable to noise. This paper proposes an artificial neural network (ANN) based method to enable DC bus protection and DC line protection for DC grids. The transient characteristics of DC voltages are analysed during DC faults. Based on the analysis, the discrete wavelet transform (DWT) is used as an extractor of distinctive features at the input of the ANN. Both frequency-domain and time-domain components are selected as input vectors. A large number of offline data considering the impact of noise is employed to train the ANN. The outputs of the ANN are used to trigger the DC line and DC bus protections and select the faulted poles. The proposed method is tested in a four-terminal MMC based DC grid under PSCAD/EMTDC. The simulation results verify the effectiveness of the proposed method in fault identification and the selection of the faulty pole. The intelligent algorithm based protection scheme has good performance concerning selectivity, reliability, robustness to noise and fast action.
ORCID iDs
Xiang, Wang ORCID: https://orcid.org/0000-0002-4619-5849, Yang, Saizhao and Wen, Jinyu;-
-
Item type: Article ID code: 70995 Dates: DateEvent1 November 2019Published1 November 2019Published Online29 October 2019AcceptedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Pure Administrator Date deposited: 18 Dec 2019 16:37 Last modified: 30 Sep 2024 03:57 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/70995