基于PSCAD／EMTDC的变压器直流偏磁仿真研究

基于PSCAD／EMTDC建立用于变压器偏磁分析的电磁暂态仿真平台，并对在PSCAD／EMTDC中实现的相关技术细节进行了说明，包括变压器模型、参数选择以及直流偏磁的模拟原理。利用该平台全面而详细地分析了变压器在正常运行、空载合闸、和应涌流、区内外故障及故障恢复等各种情况下变压器直流偏磁的波形特征，并分析相关保护的动作行为。结果表明：变压器直流偏磁对相关继电保护影响不大，只是在大的过渡电阻或轻微匝间故障时，区内故障可能出现拒动的情况。...

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Bibliographic Details
Published in电力系统保护与控制 Vol. 40; no. 19; pp. 78 - 84
Main Author 张雪松 黄莉
Format Journal Article
LanguageChinese
Published 浙江省电力公司电力科学研究院,浙江 杭州 310014%浙江同济科技职业学院机电系,浙江 杭州 311231 2012
Subjects
PSCAD／EMTDC
仿真
变压器
直流偏磁
变压器
直流偏磁
仿真
PSCAD/EMTDC
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ISSN1674-3415

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Summary:基于PSCAD／EMTDC建立用于变压器偏磁分析的电磁暂态仿真平台，并对在PSCAD／EMTDC中实现的相关技术细节进行了说明，包括变压器模型、参数选择以及直流偏磁的模拟原理。利用该平台全面而详细地分析了变压器在正常运行、空载合闸、和应涌流、区内外故障及故障恢复等各种情况下变压器直流偏磁的波形特征，并分析相关保护的动作行为。结果表明：变压器直流偏磁对相关继电保护影响不大，只是在大的过渡电阻或轻微匝间故障时，区内故障可能出现拒动的情况。
Bibliography:PACAD/EMTDC; DC magnetic bias; transformer; simulation
ZHANG Xue-song, HUANG Li （1. Electric Power Research Institute, Zhejiang Electric Power Corporation, Hangzhou 310014, China; 2. Zhejiang Tongji Vocational College of Science ＆ Technology, Hangzhou 311231, China）
41-1401/TM
Electromagnetic transients simulation model is set up for analysis of DC magnetic bias induced current of transformer based on PSCAD/EMTDC. Related technology detail is explained, such as the model and parameters selection of transformer and the simulate principle of DC magnetic bias. By this model, DC magnetic bias induced current of transformer is analyzed under different kinds of conditions including normal operation, no-load switching, sympathetic inrush, internal and external faults and faults recovery Results show that DC magnetic bias of transformer has small effect on related relay protection, but it may refuse to operate for internal fault when the larger transition resistance or slight interturn fault occurs.
ISSN:1674-3415