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.
作者
张科科
齐磊
崔翔
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)
出处
《电网技术》
EI
CSCD
北大核心
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)~~
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
multi-winding medium frequency transformer
flexible substation
DC/DC converter
wideband modeling
transmission characteristics
作者简介
张科科(1994),男,硕士研究生,研究方向为高频变压器宽频建模、先进输电技术,E-mail:17801150536@163.com;齐磊(1978),男,通信作者:教授,主要从事电力系统先进输电技术、电磁兼容和电磁场数值计算等方面的研究工作,E-mail:qilei@ncepu.edu.cn;崔翔(1960),男,教授,博士生导师,主要从事电磁场理论及其应用、电力系统电磁环境与电磁兼容、先进输电技术等方面的研究工作;李盈(1994),女,硕士研究生,研究方向为变压器宽频建模、高压直流断路器供能系统;康伟(1983),男,硕士研究生,工程师,研究方向为柔性交流输电技术在电力系统中的应用;赵国亮(1978),男,博士,高级工程师,主要从事柔性输电技术和定制电力技术的研究工作。
