A study on the effect of continuous impact load on thermal life of main transformer in urban rail transit
The main transformer is key power equipment connecting the main network with the urban rail transit grid, and therefore, its safe and stable operation has great significance. However, the impact characteristics of the metro load is different from the general power load of the grid, resulting in a mo...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2023-01-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2023.01.104 |
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| Summary: | The main transformer is key power equipment connecting the main network with the urban rail transit grid, and therefore, its safe and stable operation has great significance. However, the impact characteristics of the metro load is different from the general power load of the grid, resulting in a more complex effect on the thermal life loss of the main transformer. In order to analyze the change of thermal life loss of the main transformer due to the impact load of the metro, in this paper, the waveform of the measured impact load of the metro was decomposed and its characteristics were extracted according to the time-varying characteristics of the impact load of the metro. Multiple simulation scenarios were set up to verify the applicability of the heat transfer differential equation method in the metro impact scenario, and the effect of the metro load on the transformer in multiple scenarios was summarized to determine the life loss of the main transformer of the metro. The analysis results show that the heat transfer differential equation method can be used as a calculation method for impact load scenarios of the metro. The life loss of the main transformer under the action of the impact load of the metro is more serious than that of the conventional electric load. The life prediction and equipment management shall be performed in advance for the main transformer in metro scenarios. |
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| ISSN: | 1000-128X |