多绕组中频变压器宽频建模方法  

Wideband Modeling Method of Multi-winding Medium Frequency Transformer

作　　者：张科科 齐磊[1] 崔翔[1] 李盈 康伟 赵国亮 ZHANG Keke;QI Lei;CUI Xiang;LI Ying;KANG Wei;ZHAO Guoliang(School of Electrical and Electronic Engineering,North China Electric Power University, Changping District,Beijing 102206,China;State Key Laboratory of Advanced Power Transmission Technology (Global Energy Interconnection Research Institute Co.,Ltd.,),Changping District,Beijing 102211,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京市昌平区102206 [2]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102211

出　　处：《电网技术》2019年第2期582-590,共9页Power System Technology

基　　金：国家重点研发计划项目(2016YFB0900900);先进输电技术国家重点实验室开放基金(GEIRI-SKL-2017-001)~~

摘　　要：多绕组中频变压器是张北柔性变电站DC/DC变换环节的核心设备。由于缺乏适用于大容量DC/DC变换器的多绕组中频变压器仿真模型,难以对变换器在中高频率下的运行特性进行准确分析。该文建立了多绕组中频变压器的宽频模型,并提出了寄生电容参数的实验提取方法。基于端口阻抗特性测量,即可完成寄生电容参数的有效提取。利用张北柔性变电站示范工程中用的4绕组中频变压器样机验证了所建宽频模型与参数提取方法的有效性。在此基础上,通过仿真与实验研究了多绕组中频变压器传输额定功率时的电压、电流传输特性,结果表明在高频下必须考虑变压器寄生电容的影响。Multi-winding medium frequency transformer is the core equipment of DC/DC transformation in Zhangbei flexible substation. Due to lack of simulation models of multi-winding transformer suitable for large capacity DC/DC converters, it is difficult to accurately analyze the external behaviors of the converters at medium and high frequencies. In this paper, a wideband model of multi-winding medium frequency transformer is established and an experimental extraction method of parasitic capacitance parameters is proposed. The parasitic capacitance parameters can be effectively extracted by measuring the resonant frequency of the multi-winding transformer with experiment. The model and parameter extraction method of a four-winding medium frequency transformer in Zhangbei flexible substation pilot project is simulated and verified. On this basis, the voltage and current transmission characteristics of the multi-winding medium frequency transformer are studied with simulation and experiment. Results show that the parasitic capacitance parameters of the transformer must be taken into consideration at high frequencies.

关 键 词：多绕组中频变压器 柔性变电站 DC/DC变换器 宽频建模 传输特性 

分 类 号：TM41[电气工程—电器]