Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling
Abstract
:1. Introduction
2. Theory of Inductive Directional Non-Intrusive Cable Fault Diagnosis
2.1. Theory of Cable Fault Diagnosis by SSTDR
2.2. Non-Intrusive Inductive Coupling
2.3. Directional Coupling
3. Simulation of Inductive Directional Cable Fault Diagnosis
3.1. Attenuation Characteristics of Non-Intrusive Coupling Cable Fault Diagnosis
3.2. Simulation of Inductive Non-Intrusive Coupling Cable Fault Diagnosis
4. Experiment of Inductive Directional Cable Fault Diagnosis
5. Conclusions
- (1)
- The inductive coupling has the advantage over the capacitive coupling in that it results in small signal attenuation;
- (2)
- For the non-intrusive inductive coupling cable fault diagnosis, although the inductive coupler is needed for signal coupling, the capacitive trappers are required to restrict the detection signal from transmitting to the power source and to eliminate the effect of the power source impedance mismatch.
Author Contributions
Funding
Conflicts of Interest
References
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Fault Setting | Result of Simulation | ||||||
---|---|---|---|---|---|---|---|
Distance (m) | Type | Capacitive Coupling | Inductive Coupling | ||||
Type | Distance (m) | Error (m) | Type | Distance (m) | Error (m) | ||
4.75 | Open | Open | 4.95 | 0.2 | Open | 5.36 | 0.61 |
5.70 | Short | Short | 5.75 | 0.05 | Short | 5.87 | 0.17 |
6.77 | Open | Open | 6.54 | −0.23 | Open | 7.15 | 0.35 |
8.10 | Short | Short | 8.35 | 0.25 | Short | 8.60 | 0.50 |
10.14 | Open | Open | 9.81 | −0.33 | Open | 9.69 | −0.45 |
15.10 | Short | Short | 14.7 | −0.40 | Short | 14.57 | −0.53 |
20.18 | Open | Open | 20.03 | 0.15 | Open | 20.65 | 0.47 |
Fault Setting | Result of Experiment | |||||
---|---|---|---|---|---|---|
Distance (m) | Type | Times | Type | Distance (m) | Error (m) | Detection rate |
4.75 | Open | 100 | Open | 4.58/5.00 | −0.17/0.25 | 90% |
Short | 100 | Short | 4.58/5.00 | −0.17/0.25 | 90% | |
5.70 | Open | 100 | Open | 5.41/5.83 | −0.29/0.13 | 93% |
Short | 100 | Short | 5.41/5.83 | −0.29/0.13 | 90% | |
6.77 | Open | 100 | Open | 6.66/6.90 | −0.11/0.13 | 93% |
Short | 100 | Short | 6.66/6.90 | −0.11/0.13 | 91% | |
8.10 | Open | 100 | Open | 7.91/8.33 | −0.19/0.23 | 92% |
Short | 100 | Short | 7.91/8.33 | −0.19/0.23 | 91% | |
10.14 | Open | 100 | Open | 9.91/10.33 | −0.23/0.19 | 92% |
Short | 100 | Short | 9.91/10.33 | −0.23/0.19 | 90% | |
15.10 | Open | 100 | Open | 14.9/15.32 | −0.2/0.22 | 91% |
Short | 100 | Short | 14.9/15.32 | −0.2/0.22 | 90% | |
20.18 | Open | 100 | Open | 20.00/20.42 | −0.18/0.24 | 91% |
Short | 100 | Short | 20.00/20.42 | −0.18/0.24 | 92% |
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Hu, S.; Wang, L.; Gao, C.; Zhang, B.; Liu, Z.; Yang, S. Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling. Sensors 2018, 18, 3724. https://doi.org/10.3390/s18113724
Hu S, Wang L, Gao C, Zhang B, Liu Z, Yang S. Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling. Sensors. 2018; 18(11):3724. https://doi.org/10.3390/s18113724
Chicago/Turabian StyleHu, Suyang, Li Wang, Chuang Gao, Bin Zhang, Zhichan Liu, and Shanshui Yang. 2018. "Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling" Sensors 18, no. 11: 3724. https://doi.org/10.3390/s18113724
APA StyleHu, S., Wang, L., Gao, C., Zhang, B., Liu, Z., & Yang, S. (2018). Non-Intrusive Cable Fault Diagnosis Based on Inductive Directional Coupling. Sensors, 18(11), 3724. https://doi.org/10.3390/s18113724