铁路车辆25 kV电压互感器直流偏磁性能试验研究
马明孔祥宇张璐
Experimental Study on the DC Bias Performance of Railway Vehicle 25 kV Voltage Transformer
MA MingKONG XiangyuZHANG Lu
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作者信息:中车长春轨道客车股份有限公司质量保证部，130062，长春
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Affiliation:CRRC Chang Chun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2019.02.022
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中图分类号/CLCN:U264.3; U270.38+1
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栏目/Col:研究报告
摘要:
针对我国电气化铁路机车和动车组25 kV电压互感器过热烧损情况，设计了可对25 kV电压互感器进行直流偏磁性能试验的方法。通过对国产和进口型号25 kV电压互感器直流偏磁性能试验，获得了它们的抗直流偏磁性能数据。理论分析和现场测量表明，接触网最高可能发生4 kV直流偏磁电压，按统计学计算，产品的抗直流偏磁水平应达到2.5 kV，而目前多数产品的抗直流偏磁水平一般只能达到1.5 kV，这是造成25 kV电压互感器运行中过热烧损的主要原因。因此，在产品的标准化设计中应重点考虑抗直流偏磁的参数大小。通过试验对比可知，采用部分磁路气隙设计的产品比采用降低额定工作磁密设计的产品有更好的抗直流偏磁性能，可以满足抗直流偏磁水平2.5 kV的要求。
Abstracts:
In view of the overheating burning accident of 25 kV voltage transformers in electrified railway locomotives and EMU of China, a method to test the DC biasing performance for 25 kV voltage transformer is designed. The DC bias magnetic performance data of domestic and imported 25 kV voltage transformers are obtained through test. Theoretical and on-site measurements indicate that the contact network may have a maximum 4 kV DC bias voltage. According to statistics, the anti-DC bias level of products should achieve 2.5 kV, but the current DC bias level of most products is measured only 1.5 kV, that is considered as the main cause of the overheating burning accident in the operation of 25 kV voltage transformers. Therefore, the anti-DC bias parameter is the key point to be considered in the standardized design of subsequent products. Through experimental comparison, products with partial magnetic path air-gap design have better resistance to DC bias than products with reduced rated magnetic flux design, and can meet the requirements of 2.5 kV anti-DC bias level.
引文 / Ref:
马明，孔祥宇，张璐.铁路车辆25 kV电压互感器直流偏磁性能试验研究[J].城市轨道交通研究，2019，22（2）：94.
MA Ming，KONG Xiangyu，ZHANG Lu.Experimental Study on the DC Bias Performance of Railway Vehicle 25 kV Voltage Transformer[J].Urban mass transit，2019，22（2）：94.
MA Ming，KONG Xiangyu，ZHANG Lu.Experimental Study on the DC Bias Performance of Railway Vehicle 25 kV Voltage Transformer[J].Urban mass transit，2019，22（2）：94.
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