Annual maintenance mode of converter station and preventive test method of DC equipment
, , , y
19 mar 2025
Acerca de este artículo
Publicado en línea: 19 mar 2025
Recibido: 23 oct 2024
Aceptado: 13 feb 2025
DOI: https://doi.org/10.2478/amns-2025-0512
Palabras clave
© 2025 Chao Kang et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Time compared
| Stay position | Conventional method(s) | Ours(s) |
|---|---|---|
| 1 | 74.16 | 39.88 |
| 2 | 83.32 | 24.30 |
| 3 | 78.65 | 34.08 |
| 4 | 82.99 | 34.48 |
| 5 | 81.97 | 35.26 |
| 6 | 75.21 | 25.20 |
| 7 | 71.89 | 36.09 |
| 8 | 77.80 | 34.65 |
| 9 | 76.79 | 29.25 |
| 10 | 82.78 | 37.22 |
| 11 | 80.09 | 39.92 |
| 12 | 79.28 | 25.91 |
| 13 | 68.79 | 32.95 |
| 14 | 78.46 | 37.00 |
| 15 | 80.06 | 21.51 |
| 16 | 75.93 | 35.46 |
| 17 | 81.16 | 34.96 |
| 18 | 81.10 | 35.99 |
| 19 | 80.19 | 37.18 |
| 20 | 80.86 | 31.93 |
| 21 | 68.54 | 31.11 |
Simulation results
| Measuring object | ||||
|---|---|---|---|---|
| HV | LW | LW | LW | LW |
| GD | VM | CC+CL | LW | CC+CL |
| GND | TK | TK | TK | TK |
| MU | CC+CL | VM | CC+CL | LW |
| 22.17 | 5.47 | 2.46 | 5.53 | |
| tan |
0.198 | 0.147 | 0.169 | 0.146 |
| 22.21 | 5.49 | 2.48 | 5.54 | |
| tan |
0.197 | 0.146 | 0.167 | 0.145 |
Actual measurement results
| Measuring object | ||||
|---|---|---|---|---|
| HV | LW | LW | LW | LW |
| GD | VM | CC+CL | LW | CC+CL |
| GND | TK | TK | TK | TK |
| MU | CC+CL | VM | CC+CL | LW |
| 25.36 | 3.74 | 6.43 | 3.71 | |
| tan |
0.273 | 0.139 | 0.243 | 0.138 |
| 25.32 | 3.75 | 6.44 | 3.72 | |
| tan0 |
0.271 | 0.140 | 0.244 | 0.139 |
Comparison of test results
| Stay position | Factory value(mΩ) | Conventional method(mΩ) | Ours(mΩ) |
|---|---|---|---|
| 1 | 83.69 | 68.94 | 84.11 |
| 2 | 87.2 | 72.28 | 81.41 |
| 3 | 81.69 | 60.07 | 81.4 |
| 4 | 80.03 | 68.48 | 81.29 |
| 5 | 84.65 | 65.73 | 85.35 |
| 6 | 84.61 | 65.07 | 83.39 |
| 7 | 81.59 | 61.49 | 88.3 |
| 8 | 84.29 | 68.5 | 81.88 |
| 9 | 89.27 | 70.43 | 82.36 |
| 10 | 81.95 | 68.61 | 80.8 |
| 11 | 85.14 | 61.17 | 84.74 |
| 12 | 86.38 | 74.33 | 80.48 |
| 13 | 81.06 | 61.56 | 89.67 |
| 14 | 88.5 | 73.77 | 85.23 |
| 15 | 88.48 | 74.69 | 85.55 |
| 16 | 86.3 | 69.87 | 81.27 |
| 17 | 82.41 | 68.43 | 81.43 |
| 18 | 83.47 | 72.84 | 80.75 |
| 19 | 81.61 | 71.56 | 89.81 |
| 20 | 89.94 | 72.67 | 86.61 |
| 21 | 82.6 | 70.68 | 81.37 |
The size of equalizing ring of different voltage grades
| Voltage rating(kV) | Double ring type(mm) | Hemispherical form(mm) | ||
|---|---|---|---|---|
| d | H | D | ||
| 110 | 150 | 680 | 550 | 480 |
| 220 | 200 | 890 | 720 | 710 |
| 500 | 250 | 1130 | 1480 | 1420 |
| 800 | 300 | 1560 | 1690 | 1630 |
Local discharge detection results
| Group number | Local discharge azimuth/° | Measured result/° | Error/° |
|---|---|---|---|
| 1 | (88.2,29.3) | (87.9,29.1) | (0.3.0.2) |
| 2 | (88.1,29.1) | (0.1,0.2) | |
| 3 | (87.8,28.9) | (0.4,0.4) | |
| 4 | (87.9,28.8) | (0.3,0.5) | |
| 5 | (88.0,29.2) | (0.2,0.1) | |
| 6 | (87.7,29.2) | (0.5,0.1) | |
| 7 | (88.1,29.0) | (0.1,0.3) | |
| 8 | (88.0,29.1) | (0.2,0.2) |