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Content Provider | IET Digital Library |
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Author | Johannesson, Niclas Norrga, Staffan |
Abstract | Multi-terminal high-voltage DC (HVDC) systems equipped with HVDC breakers require that detection and clearing of faults occur within a few milliseconds. Although detection without communication is generally preferred with regard to detection delay and simplicity, detection schemes relying on communication can enhance the overall performance due to their reliability. One such principle is the travelling wave differential protection that is based on the comparison of waves at both ends rather than solely on current. However, as with conventional differential protections, some kind of synchronisation must be applied to properly compensate for the time difference between samples obtained at different geographical locations. In this study, a synchronisation algorithm is presented that applies real-time signal processing to automatically obtain a proper compensation between the signals from both ends. The algorithm is examined by injection of data samples, generated from the simulation of an external fault in a PSCAD/EMTDC model. Additionally, the suitability for a real-time implementation is evaluated by execution time estimation using a simulated DSP. The algorithm is found to perform well, not only in identifying the compensation delay but also in terms of computational efficiency, thus allowing for real-time application. |
Starting Page | 1007 |
Ending Page | 1011 |
Page Count | 5 |
Volume Number | 2018 |
e-ISSN | 20513305 |
Issue Number | Issue 15, Oct (2018) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/joe/2018/15 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.0225 |
Journal | The Journal of Engineering |
Publisher | The Institution of Engineering and Technology |
Publisher Date | 2018-07-18 |
Access Restriction | Open |
Rights License | Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/) |
Subject Keyword | Circuit Breaker Compensation Delay Conventional Differential Protections D.C. Transmission Detection Delay Detection Scheme Different Geographical Locations Execution Time Estimation External Fault Fault Location HVDC Breaker HVDC Power Converter HVDC Power Transmission Longitudinal Differential Protections Multiterminal High-voltage DC System Multiterminal HVDC System Power Engineering Computing Power Grid Power System Protection Power Transformer Protection Power Transmission Fault Power Transmission Line Power Transmission Protection Proper Compensation Real-time Application Real-time Implementation Real-time Signal Processing Synchronisation Synchronisation Algorithm Time Difference Travelling Wave Differential Protection Wave Arrival Time |
Content Type | Text |
Resource Type | Article |
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