| 自耦变压器零序电流方向纵联保护 |
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| 引用本文： | 索南加乐,阿里木江·卡德尔,张燕涛,孙金凤.自耦变压器零序电流方向纵联保护[J].电工标准与质量,2008(4). |
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| 作者姓名： | 索南加乐 阿里木江·卡德尔 张燕涛 孙金凤 |
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| 作者单位： | 西安交通大学电气工程学院;新疆大学电气工程学院;西安供电局; |
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| 基金项目： | 国家自然科学基金(50677051); 国家科技攻关计划(2005BA208C) |
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| 摘 要： | 高压大容量自耦变压器在高、中压侧常配有零序电流差动保护,以提高对接地故障的灵敏性,但其受电流互感器饱和影响较大,不易整定.据此提出一种自耦变压器零序电流方向纵联保护原理,通过比较自耦变高、中压侧零序电流和中性点零序电流相位实现保护判别,该原理能够灵敏地反应变压器的匝地和匝间故障,受电流互感器饱和影响小.仿真和动模试验数据验证了该方法的可行性.
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| 关 键 词： | 自耦变压器 零差保护 故障方向 TA饱和 |
Study on zero-sequence current directional comparison protection of autotransformer |
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| Abstract: | In order to enhance the sensitivity of ground fault protection,zero-sequence current differential protection is often applied to large capacity autotransformers.With the influence of current transformer saturation,it's difficult to choose a proper setting threshold.To solve this problem,a new type zero-sequence current directional comparison protection is proposed in this paper.The new method compares the phase angle of high-voltage side zero-sequence current,middle-voltage side zero-sequence current and th... |
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| Keywords: | autotransformer zero-sequence current differential protection fault direction current transformer saturation |
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