| 引用本文: | 杨晓辉,王丰华,段若晨,郑含博.500 kV电力变压器直流偏磁耐受性能的仿真研究[J].电力系统保护与控制,2014,42(14):60-66.[点击复制] |
| YANG Xiao-hui,WANG Feng-hua,DUAN Ruo-chen,ZHENG Han-bo.Simulation study of DC bias enduring ability of 500 kV power transformer[J].Power System Protection and Control,2014,42(14):60-66[点击复制] |
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| 摘要: |
| 为了深入研究500 kV电力变压器的直流偏磁耐受性能，根据J-A磁滞回线理论，基于电路磁路模型建立了500 kV自耦变压器的直流偏磁仿真模型，通过改变J-A模型中的关键参数，仿真研究了矫顽力、剩磁和磁滞损耗等硅钢片磁化特性对500 kV变压器直流偏磁耐受性能的影响。仿真结果表明，变压器直流偏磁时，励磁电流出现畸变，有偶次谐波出现，励磁电流随直流分量的增大呈现不同的增幅。当磁滞回线的矫顽力增大时，励磁电流及其总谐波畸变率随外加直流分量的增幅变小。当剩磁和磁滞损耗增大时，励磁电流及其总谐波畸变率随外加直流分量 |
| 关键词: 电力变压器 直流偏磁 J-A磁滞回线理论 励磁电流 谐波畸变率 |
| DOI：10.7667/j.issn.1674-3415.2014.14.010 |
| 投稿时间：2013-10-17修订日期：2013-12-09 |
| 基金项目:国家自然科学基金（51207090） |
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| Simulation study of DC bias enduring ability of 500 kV power transformer |
| YANG Xiao-hui,WANG Feng-hua,DUAN Ruo-chen,ZHENG Han-bo |
| (Henan Electric Power Company Electric Power Research Institute, Zhengzhou 450008, China;Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) |
| Abstract: |
| In order to further study the DC bias enduring ability of 500 kV power transformer, DC bias simulation model of 500 kV auto-transformer is built based on the electric circuit and magnetic circuit combined model according to the J-A hysteresis loop theory. The effects of magnetizing property of silicon steel sheet including coercive force, remanence, hysteresis loss to the enduring ability of 500 kV power transformer are simulated through the variations of key parameters in J-A model. It is seen that the magnetic currents are distorted with the occurrence of even harmonics when the DC component enters into the power transformer. The magnetizing currents are increased with different amplitudes with the increasing of DC component. When the coercive force of hysteresis loop is increased, the variations of magnetic currents and its total harmonics distortion are increased gradually. When remanence and hysteresis loss are increased, the variations of magnetic currents and its total harmonics distortion are increased greatly. The obtained results could provide theoretical references and new thoughts for the improvement of DC bias enduring ability of power transformer and suppression measure of DC bias with certain practical value. |
| Key words: power transformer DC bias J-A hysteresis loop theory magnetic current total harmonics distortion |
