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| Content Provider | IET Digital Library |
|---|---|
| Author | Zhang, Chenhao Song, Guobing Yang, Liming Dong, Xinzhou |
| Abstract | High voltage dc (HVDC) transmission, especially voltage source converter (VSC)-based HVDC transmission requires high-speed operation for relay protection. However, traditional derivative-based non-unit travelling wave-based protection (TWP) methods are sensitive to the fault impedance, resulting in low protection sensitivity in case of the high-impedance fault. First, the fault information containing in the fault travelling wavefront is analysed based on the frequency-dependent parameters of the dc transmission line and the broadband characteristic of the fault-point initial travelling wave. It can be concluded that the distortion of the fault travelling wavefront depends on the fault distance and the amplitude of the fault travelling wavefront depends on the fault impedance. Then, a principle of non-unit TWP for dc transmission line based on waveform correlation calculation is proposed. The proposed method is verified in both thyristor-based HVDC and VSC HVDC PSCAD test systems. The simulation results verify the high-speed, high fault-impedance tolerability and correctness of the proposed protection method. |
| Starting Page | 2263 |
| Ending Page | 2270 |
| Page Count | 8 |
| ISSN | 17518687 |
| Volume Number | 14 |
| e-ISSN | 17518695 |
| Issue Number | Issue 12, Jun (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/14/12 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0455 |
| Journal | IET Generation, Transmission & Distribution |
| Publisher Date | 2020-02-26 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | D.C. Transmission Dc Transmission Line Fault Diagnosis Fault Distance Fault Impedance Fault Information Fault Location Fault Travelling Wavefront Fault-point Initial Travelling Wave High Fault-impedance Tolerability High-impedance Fault High-speed Operation HVDC Power Converter HVDC Power Transmission Low Protection Sensitivity Nonunit Travelling Wave Protection Method Nonunit Travelling Wave-based Protection Method Power Converter Power Grid Power Supplies to Apparatus Power System Protection Power Transmission Fault Power Transmission Line Power Transmission Protection Relay Protection Thyristor-based HVDC VSC HVDC PSCAD Test System Waveform Correlation Calculation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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