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| 引用本文: | 姚玉斌,吴志良,王丹,李洪,郭峰.电力系统变压器模型分析[J].电力系统保护与控制,2007,35(24):16-20.[点击复制] |
| YAO Yu-bin,WU Zhi-liang,WANG Dan,LI Hong ,GUO Feng.Study on transformer representation in power system[J].Power System Protection and Control,2007,35(24):16-20[点击复制] |
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| 电力系统变压器模型分析 |
| 姚玉斌1,吴志良1,王丹1,李洪2,郭峰3 |
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| (1.大连海事大学自动化与电气工程学院，辽宁 大连 116026;2烟台市产品质量监督检验所，山东 烟台 264000;3.宝鸡供电局凤县供电分局，陕西 凤县 721700) |
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| 摘要: |
| 目前广泛使用的理想变压器串联一个恒定等值阻抗的变压器模型，一般只以等值阻抗是否位于变压器标准变比侧来区分，而没有考虑等值阻抗是位于可调分接头侧还是位于固定抽头侧的问题。分析与计算表明，当变压器分接头变化时，变压器模型的等值阻抗是否位于可调分接头侧，计算结果有较大不同，说明了等值阻抗与它是否在可调分接头侧关系很大。实际上，变压器绕组的漏抗和电阻是随着分接头调整而变化的，选取能反应这种变化关系的变压器模型是十分必要的。通过对变压器模型中等值阻抗性质的分析，认为采用等值阻抗在固定抽头侧的变压器模型是合理的。 |
| 关键词: 变压器模型 等值阻抗 可调分接头 固定抽头 |
| DOI：10.7667/j.issn.1674-3415.2007.24.004 |
| 投稿时间：2007-06-05修订日期：2007-07-26 |
| 基金项目:国家自然科学基金资助项目(60674037) |
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| Study on transformer representation in power system |
| YAO Yu-bin1,WU Zhi-liang1,WANG Dan1,LI Hong 2,GUO Feng3 |
| (1. Dalian Maritime University, Dalian 116026, China;;2. Yantai Products Quality Supervision and Inspection Institute, Yantai 264000, China;3. Fengxian Branch, Baoji Power Electric Company, Fengxian 721700, China) |
| Abstract: |
| Presently in transformer model, it is considered mainly whether the equivalent impedance is assigned to the side of normal ratio, but seldom whether the equivalent impedance is on the side of on-load tap changer. The calculation results show that there is much difference between the model whose equivalent impedance being on the side of on-load tap changer and the one on the side of fixed tap, and this conclusion is also proved by theoretical analysis. Actually, both leakage reactance and resistance of a transformer winding varies with the tap position, so it is necessary to choose an appropriate transformer model which can reflect this relation. The analysis on equivalent impedance of the transformer model indicates that the transformer model with its equivalent impedance being on the side of fixed tap is rational one. |
| Key words: transformer model equivalent impedance on-load tap changer fixed tap |
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