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| Content Provider | IET Digital Library |
|---|---|
| Author | Xiang, Wang Yang, Saizhao Wen, Jinyu |
| Abstract | Fast and reliable protection is a significant technical challenge in the 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 study 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. On the basis of the analysis, the discrete wavelet transform 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. |
| Starting Page | 199 |
| Ending Page | 210 |
| Page Count | 12 |
| ISSN | 17521416 |
| Volume Number | 14 |
| e-ISSN | 17521424 |
| Issue Number | Issue 2, Feb (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/14/2 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0733 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2019-11-01 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | ANN-based Robust DC Fault Protection Algorithm Artificial Neural Network-based Method Control of Electric Power System D.C. Transmission DC Bus Protection DC Fault DC Line Protection DC Voltage Discrete Wavelet Transform Existing Fault Detection Method Fault Diagnosis Fault Identification Faulted Poles Four-terminal MMC-based DC Grid High-resistance Fault HVDC Power Converter HVDC Power Transmission Intelligent Algorithm-based Protection Scheme MMC High-voltage Direct Current Grid Modular Multilevel Converter-based DC Grid Neural Nets Power Converter Power Engineering Computing Power Grid Power Supplies to Apparatus Power System Protection Power Transmission Fault Power Transmission Protection Protective Thresholds Reliable Protection Significant Technical Challenge Wavelet Transform |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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