多次短路冲击下变压器绕组累积效应及抗短路能力研究
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关键词：短路冲击；形变；累积效应；抗短路能力；应力；绕组；振动DOI：10. 15938/j. emc.2025.11.005中图分类号：TM401 文献标志码：A 文章编号：1007-449X（2025）11-0044-12
Research on winding cumulative effect and short-circuit resistance of transformer under multiple short-circuit impacts
CAO Chen， HUANG Hewei， ZHU Xichi， CUI Zhaoxuan （School of Electrical Engineering，Shenyang University of Technology，Shenyang 110870，China）
Abstract：In order to investigate the accumulation and short-circuit withstand capability of transformer windings subjected to multiple short circuit impact，a distribution transformer of model S11-M-500/35 was taken as the research object. Firstly，a simulation model under a single short-circuit impulse was established，and its electromagnetic-mechanical analysis was simulated.Secondly，a vibration signal data acquisition system platform under multiple short-circuit shocks was built to obtain the vibration signal spectrum. Then，a multiple short-circuit impact model was established and compared with experimental data to verify the model’s accuracy. Finally，the winding structure was optimized by configuring different numbers of spacers，and its short-circuit resistance was improved. In conclusion：under a single shortcircuit impact，the middle part is the weak area for stress and deformation. Underthe condition of multiple short-circuit impact experiments，the amplitude at 100Hz reaches 4.41m/s2 ，and the vibration response is significantly enhanced. The cumulative maximum deformation at the middle part of the winding is 2.384mm ，and the maximum stress value is 87.152MPa . This method provides technical support for further research on the cumulative efect and short-circuit withstand capability of transformer windings under multiple short-circuit impulses.
Keywords：short-circuit impact; deformation; cumulative effect; short-circuit withstand capability;stress ; winding ; vibration
0引言
随着中国的发展，电力的重要性也越来越突出，其中变压器在电网运行中的重要性也逐渐突出[1-2]，对变压器而言，短路故障是一种常见的故障现象，单次短路故障并不会使变压器发生直接损坏，然而当变压器受到多次短路故障时，会在发生短路故障的变压器的基础上继续产生影响，致使绕组和支撑结构发生变化，最终导致故障和损坏的发生[3-5] 。（剩余13289字）
