Research on Safety Technology for High-Speed Interruption for Mining Flameproof Movable Substation
Abstract
:1. Introduction
2. Background
2.1. Solid-State Circuit Breaker-Neutral (SSCB-N)
2.2. Ultra-High-Speed Single-Phase Earth Leakage Protection
2.3. Ultra-High-Speed Short-Circuit Protection
2.3.1. Rate of Change of the Short-Circuit Current
- is the periodic component amplitude of the short-circuit current, , A.
- is the impedance of the short-circuit branch, .
- is the amplitude of the load current before short-circuit occurrence, A.
- is the impedance angle of the loop of the short-circuit, , rad.
- is the initial phase angle of the voltage at the time of short-circuit occurrence, rad.
- is the time constant of short-circuit loop, , s.
2.3.2. Rate of Change of the Motor Starting Current
- is the peak value of motor starting current, A.
- is the initial phase angle of phase voltage, rad.
- is the impedance angle of starting loop, rad.
- is the time constant of starting loop, , s.
3. The Verification the Algorithm
3.1. Ultra-High-Speed Earth Leakage Protection
3.2. Ultra-High-Speed Short-Circuit Protection
4. Experiments
5. Discussion of Results
Author Contributions
Funding
Conflicts of Interest
References
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Branch Number | Condition | Actual Settings | Calculated Parameters | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
R | C | t = 1.4–1.43 | t = 1.44–1.47 | t = 1.48–1.51 | … | t = 1.96–1.99 | ||||||
… | ||||||||||||
1 | normal | 10,000 | 0.001 | 1522 | 0.0010 | 991.8 | 0.0011 | 2933.7 | 0.0010 | … | 3316 | 0.001 |
2 | normal | 1000 | 0.15 | 17.7 | 0.155 | 9.15 | 0.16 | 109.5 | 0.150 | … | 309 | 0.150 |
3 | normal | 100 | 0.3 | 7.29 | 0.31 | 4.32 | 0.32 | 23.7 | 0.30 | … | 32.8 | 0.30 |
4 | normal | 35 | 0.5 | 3.78 | 0.52 | 2.27 | 0.53 | 9.42 | 0.50 | … | 11.6 | 0.50 |
5 | fault | 100 | 0.1 | −2.18 | −98.3 | −1.26 | −1.01 | −6.33 | −95.3 | … | −8.30 | −95.1 |
Branch Number | Condition | Actual Settings | Calculated Parameters | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
R | C | t = 1.4–1.43 | t = 1.44–1.47 | t = 1.48–1.51 | … | t = 1.96–1.99 | ||||||
… | ||||||||||||
1 | normal | 10,000 | 0.001 | 3387.3 | 0.00102 | 3383.9 | 0.00103 | 3194.3 | 0.00102 | … | 2943.1 | 0.00102 |
2 | normal | 1000 | 0.15 | 438.00 | 0.152 | 429.65 | 0.152 | 201.64 | 0.153 | … | 111.51 | 0.153 |
3 | normal | 100 | 0.3 | 35.00 | 0.305 | 34.9 | 0.3 | 29.48 | 0.306 | … | 23.85 | 0.305 |
4 | normal | 35 | 0.5 | 12.00 | 0.508 | 11.98 | 0.51 | 10.84 | 0.511 | … | 9.47 | 0.509 |
5 | fault | 100 | 0.1 | −8.74 | −0.97 | −8.71 | −0.97 | −7.61 | −0.97 | … | −6.38 | −0.97 |
Branch Number | Condition | Actual Settings | Calculated Parameters | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
R | C | t = 1.4–1.43 | t = 1.44–1.47 | t = 1.48–1.51 | … | t = 1.96–1.99 | ||||||
… | ||||||||||||
1 | normal | 10,000 | 0.001 | 3484.7 | 0.00102 | 3439.1 | 0.00101 | 3378.8 | 0.00102 | … | 3140.4 | 0.00102 |
2 | normal | 1000 | 0.15 | 956.4 | 0.152 | 618.91 | 0.153 | 417.7 | 0.153 | … | 173.5 | 0.153 |
3 | normal | 100 | 0.3 | 38.3 | 0.305 | 36.72 | 0.305 | 34.7 | 0.306 | … | 28.9 | 0.305 |
4 | normal | 35 | 0.5 | 12.6 | 0.508 | 12.3 | 0.51 | 11.9 | 0.51 | … | 10.5 | 0.509 |
5 | fault | 100 | 0.1 | −9.38 | −0.966 | −9.07 | −0.97 | −8.68 | −0.97 | … | −7.32 | −0.968 |
= 0.1 | |||||||||||
0.30 | 0.32 | 0.34 | 0.36 | 0.38 | 0.40 | 0.42 | 0.44 | 0.46 | 0.48 | 0.50 | |
1.01 | 1.02 | 1.03 | 1.03 | 1.04 | 1.05 | 1.06 | 1.06 | 1.07 | 1.09 | 1.10 | |
(ms) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | |
= 0.01 | |||||||||||
0.30 | 0.32 | 0.34 | 0.36 | 0.38 | 0.40 | 0.42 | 0.44 | 0.46 | 0.48 | 0.50 | |
1.07 | 1.07 | 1.07 | 1.07 | 1.08 | 1.09 | 1.09 | 1.10 | 1.11 | 1.13 | 1.15 | |
(ms) | 14.0 | 14.0 | 13.9 | 13.7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
0 | 0 | 0 | 0 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | |
= 0 | |||||||||||
0.30 | 0.32 | 0.34 | 0.36 | 0.38 | 0.40 | 0.42 | 0.44 | 0.46 | 0.48 | 0.50 | |
1.07 | 1.07 | 1.07 | 1.07 | 1.08 | 1.09 | 1.10 | 1.11 | 1.13 | 1.14 | 1.15 | |
(ms) | 14.0 | 13.9 | 13.8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
180 | 0 | 0 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 90 |
0.01 | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | 0.99 | 0.999 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
TA KL | |||||||||||||
1.5 | 5.5 | 5.0 | 5.1 | 5.1 | 11.7 | 12.0 | 12.2 | 11.9 | 10.9 | 2.6 | 0.7 | 0.1 | |
2.0 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.0 | 2.9 | 2.7 | 2.4 | 1.7 | 0.4 | 0.1 | |
2.5 | 2.6 | 2.6 | 2.6 | 2.6 | 2.5 | 2.4 | 2.4 | 1.9 | 1.7 | 1.3 | 0.4 | 0.1 | |
3.0 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 1.8 | 1.7 | 1.6 | 1.4 | 0.7 | 0.3 | 0.1 | |
3.5 | 1.7 | 1.7 | 1.7 | 1.7 | 1.6 | 1.6 | 1.5 | 1.4 | 1.3 | 0.6 | 0.2 | 0.1 |
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Wang, Y.; Wang, L.; Bilén, S.G.; Gao, Y. Research on Safety Technology for High-Speed Interruption for Mining Flameproof Movable Substation. Energies 2020, 13, 934. https://doi.org/10.3390/en13040934
Wang Y, Wang L, Bilén SG, Gao Y. Research on Safety Technology for High-Speed Interruption for Mining Flameproof Movable Substation. Energies. 2020; 13(4):934. https://doi.org/10.3390/en13040934
Chicago/Turabian StyleWang, Yanwen, Le Wang, Sven G. Bilén, and Yan Gao. 2020. "Research on Safety Technology for High-Speed Interruption for Mining Flameproof Movable Substation" Energies 13, no. 4: 934. https://doi.org/10.3390/en13040934