| 基于仿真与实验的变压器负荷侧直流偏磁特性研究 |
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| 引用本文： | 李慧奇,胡阳,李晓龙.基于仿真与实验的变压器负荷侧直流偏磁特性研究[J].电测与仪表,2015,52(21). |
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| 作者姓名： | 李慧奇 胡阳 李晓龙 |
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| 作者单位： | 华北电力大学电气与电子工程学院 保定 071003,华北电力大学电气与电子工程学院 保定 071003,国网河北省电力公司 |
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| 摘 要： | 直流偏磁问题对输变电设备及电力系统的正常运行造成干扰。针对直流偏磁的负荷侧情形,基于UMEC变压器模型的PSCAD平台仿真与相同电气模型下的实验研究反映出交直流磁通叠加使励磁电流发生畸变,磁滞特性作用明显。在偏磁电流计算上,提出考虑漏磁、直流磁通的Φ-I回线对应法,最后以实验验证了该方法的准确性。
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| 关 键 词： | 变压器 直流偏磁 磁滞特性 电路-磁路耦合 |
| 收稿时间： | 2014/5/18 0:00:00 |
| 修稿时间： | 2014/5/18 0:00:00 |
Transformer Characteristics Analysis under DC BiasBased on the Experiments |
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| LI Huiqi,HU Yang and LI Xiaolong.Transformer Characteristics Analysis under DC BiasBased on the Experiments[J].Electrical Measurement & Instrumentation,2015,52(21). |
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| Authors: | LI Huiqi HU Yang and LI Xiaolong |
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| Affiliation: | School of Electrical and Electronic Engineering,North China Electric Power University,School of Electrical and Electronic Engineering,North China Electric Power University,State Grid Hebei Electric Power Company |
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| Abstract: | In this paper, experimental researches focus on the load side model and the supply side model of DC bias. On this basis, considering the transformer magnetic leakage and hysteresis effect, an improved circuit-magnetic coupling model is proposed to accurately reflect the distorted situation of bias current. Then the load excitation characteristics of a single-phase transformer under DC bias were calculated and analyzed. Finally the experimental results prove the validity of the proposed method and provide methods and ideas to study the excitation characteristics of the transformer |
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| Keywords: | Transformer DC bias Hysteresis characteristics the circuit - magnetic coupling |
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