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城市轨道交通连续冲击负荷对主变压器热寿命影响研究
A study on the effect of continuous impact load on thermal life of main transformer in urban rail transit
- 机车电传动 2023年第1期 页码：122-130
- 作者机构：
1.上海电力大学 电气工程学院，上海 200090
2.上海申通地铁集团有限公司，上海;201103
- 作者简介：
赵文彬（1977—），男，高级工程师，研究方向为电气设备状态管理和高压新技术应用；E-mail: zhaowenbin@shiep.edu.cn
- 基金信息：
DOI：10.13890/j.issn.1000-128X.2023.01.104
中图分类号： U239.5纸质出版日期：2023-01-10，
收稿日期：2022-04-22，
修回日期：2022-09-30，
- 稿件说明：
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叶青, 赵文彬, 郑欣, 等. 城市轨道交通连续冲击负荷对主变压器热寿命影响研究[J]. 机车电传动, 2023(1): 122-130.
YE Qing, ZHAO Wenbin, ZHENG Xin, et al. A study on the effect of continuous impact load on thermal life of main transformer in urban rail transit[J].Electric Drive for Locomotives, 2023(1): 122-130.
叶青, 赵文彬, 郑欣, 等. 城市轨道交通连续冲击负荷对主变压器热寿命影响研究[J]. 机车电传动, 2023(1): 122-130. DOI： 10.13890/j.issn.1000-128X.2023.01.104.
YE Qing, ZHAO Wenbin, ZHENG Xin, et al. A study on the effect of continuous impact load on thermal life of main transformer in urban rail transit[J].Electric Drive for Locomotives, 2023(1): 122-130. DOI： 10.13890/j.issn.1000-128X.2023.01.104.
摘要
主变压器作为连接主网与城市轨道交通电网的关键电力设备，其安全稳定运行具有重要意义。但由于地铁负荷的冲击特性不同于一般电网的电力负荷，对主变压器的热寿命损失影响更复杂。为分析地铁冲击负荷对主变压器热寿命损失的变化，本文根据地铁冲击负荷时变性，对实测地铁冲击负荷波形分解及特征提取，设置多类模拟场景，验证热传递微分方程法在地铁冲击场景中的适用性，并总结多场景下地铁负荷对变压器的影响，确定地铁主变压器的寿命损失。分析结果表明：热传递微分方程法可作为地铁冲击负荷场景的计算方法，且相比于常规电力负荷，地铁冲击负荷作用下的主变压器寿命损失更严重，对地铁场景下的主变压器需提前开展寿命预测与设备管理。
Abstract
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.
关键词
冲击负荷主变压器城市轨道交通电网热传递微分方程法热老化评估
Keywords
impact loadmain transformerurban rail transitgridheat transfer differential equation methodthermal aging assessment
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