基于对偶性原理的配电变压器高频电磁暂态模型  

High Frequency Electromagnetic Transient Model of Distribution Transformer Based on Duality Principle

作　　者：杨庆[1] 崔浩楠 揭青松 刘红文 黄继盛 YANG Qing;CUI Haonan;JIE Qingsong;LIU Hongwen;HUANG Jisheng(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400030,China;Electric Power Research Institute,Yunnan Electric Power Grid Co.,Ltd.,Kunming 650217,China;Lincang Power Supply Company,Yunnan Electric Power Grid Co.,Ltd.,Lincang 677000,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]云南电网有限责任公司电力科学研究院,昆明650217 [3]云南电网有限责任公司临沧供电局,临沧677000

出　　处：《高电压技术》2022年第4期1498-1509,共12页High Voltage Engineering

基　　金：国家自然科学基金(51477018;51837002)。

摘　　要：在高频范围内建立配电变压器模型对研究故障暂态行波及中压、低压电力线通信信号的传播特性具有重要意义。该文基于低频电磁暂态模型提出了变压器的高频模型,使用阻抗分析仪测量了两种类型变压器的端口阻抗特性,从而等效计算出变压器模型中的参数。同时建立了变压器高频模型,通过仿真得到模型端口的阻抗特性,与实测结果的对比分析表明变压器模型在频域下的准确性;搭建了研究脉冲信号在变压器中传播特性的试验平台,对比了实测和仿真电压波形,验证了变压器模型在时域上的有效性。结果表明:该文提出的模型适用于不同类型的配电变压器,可用于在100 Hz~1 MHz间的高频信号在配电变压器中的传播特性研究。Establishing a distribution transformer model in the high-frequency range is of great significance for studying the propagation characteristics of fault transient traveling waves and medium-voltage,low-voltage power line communication signals.Based on the low frequency electromagnetic transient model,this paper proposes a high frequency model of transformers.The impedance analyzer is used to measure the ports impedance characteristics of the two types of transformers,and the parameters of the transformer model are calculated equivalently.The high frequency model of transformers is established,and the impedance characteristics of the model’s ports are obtained by simulation.The comparison between the measured and simulated results shows the accuracy of the transformer model in the frequency domain;the experimental platform for studying the propagation characteristics of pulse signal in the transformer is built,and the effectiveness of the transformer model in the time domain is verified by comparing the measured and simulated voltage waveforms.The results show that the model proposed in this paper is suitable for different types of distribution transformers and it can be used to study the propagation characteristics of high frequency signals in distribution transformers between 100 Hz and 1 MHz.

关 键 词：配电变压器 高频模型 电力物联网 对偶性原理 集总模型 

分 类 号：TM421[电气工程—电器] TM712