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CRAFT超导磁体电源换流变压器短路阻抗设计

黄荣林 傅鹏 黄连生 许留伟 高格 何诗英

黄荣林, 傅鹏, 黄连生, 等. CRAFT超导磁体电源换流变压器短路阻抗设计[J]. 强激光与粒子束, 2021, 33: 096001. doi: 10.11884/HPLPB202133.210088
引用本文: 黄荣林, 傅鹏, 黄连生, 等. CRAFT超导磁体电源换流变压器短路阻抗设计[J]. 强激光与粒子束, 2021, 33: 096001. doi: 10.11884/HPLPB202133.210088
Huang Ronglin, Fu Peng, Huang Liansheng, et al. Short-circuit impedance design for converter transformer of superconducting magnet power supply for CRAFT[J]. High Power Laser and Particle Beams, 2021, 33: 096001. doi: 10.11884/HPLPB202133.210088
Citation: Huang Ronglin, Fu Peng, Huang Liansheng, et al. Short-circuit impedance design for converter transformer of superconducting magnet power supply for CRAFT[J]. High Power Laser and Particle Beams, 2021, 33: 096001. doi: 10.11884/HPLPB202133.210088

CRAFT超导磁体电源换流变压器短路阻抗设计

doi: 10.11884/HPLPB202133.210088
基金项目: 聚变堆主机关键系统综合研究设施项目(2018-000052-73-01-001228)
详细信息
    作者简介:

    黄荣林(1973—),男,博士研究生,从事聚变工程变流电源及控制技术研究

    通讯作者:

    黄连生(1983—),男,研究员,从事聚变工程变流电源及控制技术研究

  • 中图分类号: TL6

Short-circuit impedance design for converter transformer of superconducting magnet power supply for CRAFT

  • 摘要: 聚变堆主机关键系统综合研究设施(CRAFT)超导磁体电源兼具大电流稳态运行、高功率脉冲运行和瞬态故障抑制能力的需求。换流变压器的短路阻抗与超导磁体电源的特性密切相关。为了优化超导磁体电源的性能,基于交直流系统的参数和换流变压器的等效电路模型,研究了换流变压器短路阻抗与超导磁体电源的输出电压、谐波电流、短路故障电流和无功损耗的关系。短路阻抗越小,超导磁体电源的额定输出电压越高,无功损耗越小,这些特性对CRAFT超导磁体电源的性能有利,但是短路故障电流和谐波电流增加,影响电源的短路故障抑制能力和谐波特性。在CRAFT超导磁体电源换流变压器短路阻抗设计时,首先短路阻抗必须满足直流电源的额定输出电压和故障电流抑制能力,其次,由于CRAFT超导磁体电源是多相变流器,仅产生高次特征谐波电流,含量少便于抑制,因而尽量选择较小的短路阻抗。
  • 图  1  超导磁体电源系统图

    Figure  1.  Simplified diagram of power supply system

    图  2  三相桥变流器触发角α时阀侧交流电流波形

    Figure  2.  Phase current waveform of valve-side of converter transformer with the firing angle α

    图  3  三变流器同步相移计算等效电路

    Figure  3.  Equivalent circuit of synchronous phase shifting for converter

    图  4  变流系统相量关系图

    Figure  4.  Phasor diagram of converter system

    图  5  变流器最高输出电压Vdmax与短路阻抗uk的关系

    Figure  5.  Relation between maximum output voltage Vdmax and short circuit impedance uk of transform

    图  6  V5V1换相的等效电路

    Figure  6.  Equivalent circuit of transferring from V5 to V1

    图  7  三相桥变流器交流侧A相电流波形

    Figure  7.  A-phase current waveform of three phase bridge converter

    图  8  谐波电流百分比与变压器短路阻抗uk的关系曲线

    Figure  8.  Relation between harmonic current and short circuit impedance uk of transform

    图  9  变流器短路故障示意图

    Figure  9.  Short-circuit fault diagram of converter

    图  10  变流器电源消耗的无功功率QS和功率因数PFuk关系曲线

    Figure  10.  Relationship curve between QS, PF and uk

    表  1  超导磁体电源系统基本参数和性能指标

    Table  1.   Design parameters and performance of the power supply

    rated voltage/Vrated power/MWrated voltage/kVrated current/kAmaximum output pulse current/kApulse width/ms
    250300.25120400200
    下载: 导出CSV

    表  2  主要设备的电气参数

    Table  2.   Electrical parameters of main equipments

    parameterrated
    voltage/kV
    short-circuit
    capacity/MVA
    rated
    power/MW
    transformer
    ratio
    short-circuit
    impedance
    load loss/
    kW
    resistance/
    inductance/
    power grid1101270
    step-down transformer63110/3510.5%232
    power cable239.4110.6
    converter transformer835/0.19746
    AC busbar0.314
    下载: 导出CSV

    表  3  主要设备的等效阻抗

    Table  3.   Equivalent impedance of main equipments

    parametersequivalent reactance/μΩequivalent resistance/μΩ
    power grid30.63.1
    step-down transformer652.3
    power cable3.57.6
    converter transformer27.9
    AC busbar3140
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-03-17
  • 修回日期:  2021-07-24
  • 网络出版日期:  2021-08-19
  • 刊出日期:  2021-09-24

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