交流传动电力机车变流器与车载电气设备相互影响的研究

  本文关键词：交流传动电力机车变流器与车载电气设备相互影响的研究，由笔耕文化传播整理发布。

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交流传动电力机车变流器与车载电气设备相互影响的研究

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【中文摘要】随着高速铁路的快速发展,交流传动技术已成为当今世界上牵引动力高新技术的标志,也是我国铁路牵引动力今后发展的主要方向。作为交流传动电力机车电传动系统的核心子系统之一,网侧变流系统要保证直流中间环节的电压恒定,交流电网侧功率因数接近1,还要使电网电流尽量接近正弦,其运行状况直接影响到电传动系统的稳定。同时,变频调速牵引电机尽缘也直接影响机车运行的稳定性和可靠性。本文对交流传动机车变流器与车载电气设备相互影响进行了研究。首先,在Matlab/simulink环境下构建了交流传动电力机车网侧变流系统。整流器采用4重PWM整流器,直流侧负载用等效电阻代替,控制方法采用瞬态电流控制。通过与实测数据对比表明,仿真系统能够很好反应变流器的实际工作情况。本文研究了变压器绕组漏感和互感对PWM整流器性能的影响。基于满足瞬态电流跟踪指标,最大调制比限制并考虑接触网电压波动,本文提出了一种确定交流侧电感的综合设计方法,并用仿真验证了此方法的正确性。仿真显示,随着绕组互感的增大,牵引绕组电流的波动增大,绕组谐波含量增加。本文计算了谐波条件下机车主变压器的铜耗以及铁耗,利用ANSOFF软件分析了铁心硅钢片的涡流特性,用有限元分析的方法计算了机车主变压器铁心进损耗功率。最后,利用一种高压脉冲方波尽缘老化试验系统模拟变频器对变频调速牵引电机定子绕组尽缘老化作用,以聚酰亚胺薄膜为试验对象,研究了脉冲方波幅值、频率对尽缘寿命的影响,提出了脉冲方波下尽缘材料的电老化寿命模型。本文的研究可为四象限变流器和变压器的优化设计提供了理论依据。同时,为变频调速牵引电机尽缘的破坏机理打下了良好的基础。');
【Abstract】 With high speed railways developed rapidly around the world, AC drive technology becomes the symbol of the world\'s high-tech traction power as well as the main developmental direction of China\'s railway traction in the future. As a core subsystem of AC drive system for electric locomotive, line side converter system takes charge of maintaining voltage stability of middle DC link, suppressing harmonic wave of AC side by *** AC current as a sine wave, *** power factor approach 1, the working condition of which is vital to the performance of drive system. Meanwhile, the insulation of traction motor has direct impact on the stability and reliability of electric locomotive. Interaction between converters and on-board electrical equipments for AC drive locomotive is studied in the theis.Firstly, simulation model of line side converter system for AC drive locomotives is built by utilizing Matlab/simulink. The coverter is quadruple PWM rectifier with the strategy of transient current control, and the DC load is simulated by a resistance. Compared with measured data, the simulation model can simulate the working condition of converter.Secondly, the influence of transformer leakage inductance and mutual inductance between windings to the performance of four-quadrant converter (4QC) is researched. To meet the performance of current tracing, limit of the maximal modulation ratio and fluctuation of catenary voltage, an integrated scheme is put forward to design the inductance parameter of AC line for 4QC. Furthermore, the results of simulation verify the feasibility and correctness of the proposed method. And it is indicated that harmonic currents of windings will increase with enlargement of winding current fluctuation when mutual inductance between windings increases.Thirdly, the copper loss and iron loss of locomotive transformer in harmonics condition is calculated. Moreover, by utilizing ANSOFT, the swirl characteristics of silicon steel sheet is analyzed, and iron loss of transformer is calculated with finite element method.Last but not least, in order to test insulation properties under continuous impulses, a new insulation aging test system is used to simulate the aging effect of converter on the winding insulation in the inverter-fed motors. The influence of impulse amplitude and frequency on insulation lifetime is investigated by using polyimide film as experimental material. Finally, an insulation electrical aging lifetime model is proposed.Research in the thesis provides theoretical basis for 4QC and transformer optimization design. At the same time, it\'s also the basis of further research on insulation failure mechanism of insulation material for traction motor.

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  本文关键词：交流传动电力机车变流器与车载电气设备相互影响的研究，由笔耕文化传播整理发布。