电工技术学报  2021, Vol. 36 Issue (zk1): 200-208    DOI: 10.19595/j.cnki.1000-6753.tces.L90141
电力电子 |
一种改进的柔性直流系统IGBT行为模型
宋鹏程, 张黎, 邹亮, 赵彤, 孙优良
山东大学电气工程学院 济南 250061
An Improved IGBT Behavioral Model of Voltage Source Converter Based on HVDC
Song Pengcheng, Zhang Li, Zou Liang, Zhao Tong, Sun Youliang
School of Electrical Engineering Shandong University Jinan 250061 China
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摘要 在柔性直流换流站中,换流阀中绝缘栅双极型晶体管(IGBT)的开关暂态过程是产生电磁干扰的重要原因之一,这些高频的电磁干扰会对换流站内关键设备的正常运行产生不利的影响。目前,在IGBT开关暂态过程建模中普遍采用行为模型,该模型虽然在仿真速度、通用性等方面有很大优势,但却存在仿真精度较低等缺点。针对现有行为模型的不足,该文提出一种基于矢量匹配法的改进行为模型,利用矢量匹配法这种高效稳定的有理函数拟合方法对行为模型中仿真精度较低阶段的波形进行拟合,并将拟合后的公式在时域内等效为简单电路的形式,然后与传统行为模型相结合,得到更加精确的IGBT暂态模型。最后,该文在仿真软件中搭建改进的行为模型,并进行仿真波形与实验波形的对比与误差分析,结果证明所提出模型精度较传统模型有较大的提高。
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宋鹏程
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关键词 柔性直流输电绝缘栅双极型晶体管(IGBT)矢量匹配行为模型    
Abstract:In voltage source converter based high voltage direct current (VSC-HVDC) converter station, the switching transient process of insulated gate bipolar transistor (IGBT) in the converter valve is one of the principal reasons for electromagnetic interference. The high-frequency electromagnetic interference will adversely affect the normal operation of key equipment in the converter station. At present, the behavioral model is widely used in the switching transient process modeling of IGBT. Although this model has significant advantages in terms of simulation speed and universality, it has some disadvantages such as low simulation accuracy. Given the shortcomings of the existing models, this paper proposes an improved behavioral model based on the vector fitting method. The vector fitting method, which is an efficient and stable rational function fitting method, is used to fit the waveforms of low simulation accuracy in the behavioral model, and the fitted formula is transformed into the form of equivalent circuit in the time domain. Then the equivalent circuit model is combined with the traditional behavioral model to obtain the more accurate IGBT transient model. Finally, this paper builds the improved behavioral model in simulation software, and conducts comparison and error analysis between the simulation waveforms and the experimental waveforms. The results show that the simulation accuracy of the proposed model is greatly improved compared with the traditional model.
Key wordsVoltage source converter based on high voltage DC (VSC-HVDC)    insulated gate bipolar transistor (IGBT)    vector fitting    behavioral model   
收稿日期: 2020-06-30     
PACS: TM564  
通讯作者: 黎 男,1979年生,副教授,博士生导师,研究方向为高电压与绝缘技术、电器设备在线监测、新型输电技术、新能源电力系统雷电防护等。E-mail: zhleee@sdu.edu.cn   
作者简介: 宋鹏程 男,1996年生,硕士,研究方向为高压柔性直流换流站电磁兼容。E-mail: songpengcheng@mail.sdu.edu.cn
引用本文:   
宋鹏程, 张黎, 邹亮, 赵彤, 孙优良. 一种改进的柔性直流系统IGBT行为模型[J]. 电工技术学报, 2021, 36(zk1): 200-208. Song Pengcheng, Zhang Li, Zou Liang, Zhao Tong, Sun Youliang. An Improved IGBT Behavioral Model of Voltage Source Converter Based on HVDC. Transactions of China Electrotechnical Society, 2021, 36(zk1): 200-208.
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