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中车株洲电力机车研究所有限公司,湖南 株洲 412001
陈 涛(1983—),男,高级工程师,长期从事牵引电力电子变压器研发工作;E-mail: chentao1@csrzic. com
纸质出版日期:2022-05-10,
收稿日期:2022-03-30,
修回日期:2022-05-01,
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陈涛, 苏亮亮, 张志学, 等. 牵引电力电子变压器系统关键技术研究[J]. 机车电传动, 2022,(3):130-137.
CHEN Tao, SU Liangliang, ZHANG Zhixue, et al. Research on key technologies for power electronic traction transformer[J]. Electric drive for locomotives, 2022,(3):130-137.
陈涛, 苏亮亮, 张志学, 等. 牵引电力电子变压器系统关键技术研究[J]. 机车电传动, 2022,(3):130-137. DOI: 10.13890/j.issn.1000-128X.2022.03.017.
CHEN Tao, SU Liangliang, ZHANG Zhixue, et al. Research on key technologies for power electronic traction transformer[J]. Electric drive for locomotives, 2022,(3):130-137. DOI: 10.13890/j.issn.1000-128X.2022.03.017.
随着半导体及磁性材料技术的发展,电力电子变压器近年来成为研究热点,相较于传统工频变压器,它具有功率密度高、效率高、高压侧电能全控、保护更加迅速等优点,是“双碳”背景下电能变换的重要技术发展方向。在牵引领域,国外较早开展牵引电力电子变压器的研究,但主要针对15 kV/16.7 Hz牵引网制式。在国内牵引网制式为25 kV/50 Hz的条件下,电力电子变压器的应用面临紧凑空间要求与更高工作电压的矛盾,导致高压主电路拓扑选型、绝缘系统小型化、冷却系统绝缘安全等一系列难题。目前世界上暂无25 kV/50 Hz牵引电力电子变压器研制情况的报道。文章针对适用于我国牵引网制式的牵引电力电子变压器系统,开展了主电路拓扑及控制、高压绝缘设计、冷却设计等关键技术的研究,分析并采用了基于3 300 V 硅基半导体器件的中性点箝位(Neutral point clamped
NPC)三电平高压高频DC-DC隔离型主电路及双边同步调制策略,实现牵引制动能量迅速切换;提出基于复合材料的绝缘系统设计方法,实现了主回路对地的高绝缘耐压;提出泵驱相变蒸发冷却关键技术,实现了变压器和变流器一体化冷却,并完成了电力电子变压器单支路样机及工程化整机的研制及装车试验,试验结果表明了设计方法的有效性。
With the technological development of semiconductor and magnetic materials
the power electronic transformer has become a research hotspot in recent years. Compared with the traditional power frequency transformer
it has the advantages of high power density and high efficiency
full control of electric energy at the high-voltage side
and rapid protection
representing an important technical development trend of electric energy conversion in the context of carbon peaking and carbon neutrality. In the field of traction
the early researches on the power electronic traction transformer abroad mainly focused on the 15 kV/16.7 Hz traction network system
while the domestic traction network system works at 25 kV/50 Hz. The domestic application of the power electronic transformer faces the contradiction between the compact space requirements and a higher working voltage
bringing a series of difficulties such as topology selection of high-voltage main circuit
miniaturization of insulation system
insulation safety of cooling system. However
the reports presenting the development status on the 25 kV/50 Hz power electronic traction transformer are absent worldwide. Targeting the power electronic traction transformer system suitable for the China's traction network system
the key technologies such as main circuit topology and control
high-voltage insulation design
cooling design was studied. In the current study
the neutral point clamped (NPC) three-level high-voltage high-frequency DC-DC isolated main circuit based on 3 300 V Si-based semiconductor devices and bilateral synchronous modulation strategy were analyzed and applied to realize rapid switching of traction/braking energy; The design approach of insulation system based on composite materials was proposed to realize the high insulation and withstand voltage of the main circuit to the ground; The key technology of pump driven phase change evaporative cooling was proposed to realize the transformer-converter integrated cooling. In addition
the development and on-board test were completed for the single branch prototype and engineering machine of the power electronic transformer. The test results demonstrate the effectiveness of the design approach.
牵引电力电子变压器三电平复合绝缘相变冷却牵引网制式
power electronic traction transformer (PETT)three-levelcomposite insulationphase change coolingtraction network system
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DUJIC D, STEINKE G K, BELLINI M, et al. Characterization of 6.5 kV IGBTs for high-power medium-frequency soft-switched applications[J]. IEEE Transactions on Power Electronics, 2014, 29(2): 906-919.
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