Name
Abstract | ||
|---|---|---|
Detection of high-resistance faults on meshed low-voltage dc grids poses a challenge, as such faults have very low fault current magnitudes. This paper proposes a hybrid passive-overcurrent relay to overcome this problem. The proposed relay consists of one current and one voltage transducer, as well as two passive elements: 1) an inductor; and 2) a capacitor. For bolted and relatively low-resistance faults, the relay uses a simple overcurrent function to detect the resultant high fault current magnitudes within 2 ms. On the other hand, for relatively high-resistance faults, a real-time discrete wavelet transform is used to detect the voltage transients generated by the relay passive elements in less than 5 ms. Furthermore, the proposed relay is inherently capable of identifying the type of fault. The proposed approach relies on local-bus measurements to detect and classify various types of faults with resistance up to 200 ohms. Analytical modeling proves that the proposed approach is system independent. Testing the hybrid passive-overcurrent relay on a +/- 750 V meshed TN-S dc grid reveals that the proposed relay is fast, sensitive, and selective under various conditions. |
Year | DOI | Venue |
|---|---|---|
2017 | 10.1109/TSG.2015.2477482 | IEEE TRANSACTIONS ON SMART GRID |
Keywords | Field | DocType |
Discrete wavelet transform (DWT), high-resistance fault, low-voltage dc (LVdc) grid, overcurrent protection | Overcurrent,Protective relay,Inductor,Electronic engineering,Digital protective relay,Fault (power engineering),Low voltage,Engineering,Solid-state relay,Electrical engineering,Relay | Journal |
Volume | Issue | ISSN |
8 | 3 | 1949-3053 |
Citations | PageRank | References |
0 | 0.34 | 3 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Khaled A. Saleh | 1 | 5 | 2.58 |
| Hooshyar, A. | 2 | 9 | 4.14 |
| El-Saadany, E.F. | 3 | 54 | 10.87 |