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| Content Provider | IET Digital Library |
|---|---|
| Author | Ikhide, Monday Tennakoon, Sarath Griffiths, Alison Ha, Hengxu Subramanian, Sankara Adamczyk, Andrzej |
| Abstract | This study presents a novel time-domain protection technique for application to DC grids. The technique utilises the power developed by the forward and backward travelling waves produced by a fault to distinguish between internal and external faults. For an internal fault, the calculated travelling wave power must exceed a predetermined setting; otherwise the fault is external. The ratio between the forward travelling wave power and the backward travelling wave power provides a directional comparison. For a forward directional fault, this ratio is less than unity, whereas the ratio is greater than unity for reverse directional faults. To improve the sensitivity of the protection scheme for long-distance remote internal fault, a second element utilising the concavity of the forward travelling wave power is proposed. The proposed technique is time domain based and does not require complex mathematical burden; moreover, as such can be easily implemented since it will require fewer hardware resources. Simulations were carried out in power systems computer-aided design/electromagnetic transient simulations, and the results presented considering wider cases of fault scenarios including 500 Ω remote internal fault shows the suitability of the proposed scheme as all fault scenarios indicated were identified within 500 µs following the application of the fault. |
| Starting Page | 1267 |
| Ending Page | 1273 |
| Page Count | 7 |
| 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.2018.0186 |
| 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 License (http://creativecommons.org/licenses/by/3.0/) |
| Subject Keyword | Backward Travelling Wave Power Complex Mathematical Signal Processing Technique Digital Signal Processing Technique Electromagnetic Transient Design EMTP External Fault Fault Diagnosis Fault Scenario Forward Directional Fault Forward Travelling Wave Power Future DC Grid Internal Fault Long-distance Remote Internal Fault Mathematical Analysis Power Grid Power System Computer-aided Design Power System Fault Power System Protection Power System Transients Remote Internal Fault Resistance 500 Ohm Reverse Directional Fault Time 500.0 Mus Time Domain Analysis Time-domain Protection Technique Transient-based Protection Technique |
| Content Type | Text |
| Resource Type | Article |
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