| 变压器一次接线组别对二次差动保护接线方式的影响 |
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| 引用本文： | 王轶. 变压器一次接线组别对二次差动保护接线方式的影响[J]. 南方电网技术, 2010, 4(3): 96-98 |
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| 作者姓名： | 王轶 |
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| 作者单位： | 广东电网公司坪石供电局,广东,韶关,512229 |
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| 摘 要： | 针对一起Y/d-11接线组别的变压器差动保护二次误接线进行分析。变压器Y侧一次绕组电压相位与d侧一次绕组电压相位存在相角差,导致变压器两侧一次电流存在相角差。因此参照d侧一次绕组的联结方式对差动保护的Y侧电流互感器二次绕组进行三角形变换,以消除一次相角差的影响,保证差动保护的二次接线方式正确。
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| 关 键 词： | 变压器 一次接线组别 二次差动保护 接线方式 |
| 收稿时间： | 2009-10-19 |
Influence of the Primary Wiring Connection Mode of Trans-former on the Connection Mode of Secon-dary Differential Protection |
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| WANG Yi. Influence of the Primary Wiring Connection Mode of Trans-former on the Connection Mode of Secon-dary Differential Protection[J]. Southern Power System Technology, 2010, 4(3): 96-98 |
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| Authors: | WANG Yi |
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| Affiliation: | Pingshi Power Supply Bureau, Guangdong Power Grid Cor-poration, Shaoguan, Guangdong 512229,China |
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| Abstract: | Analysis is carried out based on a misconnection fault of secondary differ-ential protection of Y/d-11 wiring category trans-former. It is found that there is a vector difference between the voltage of Y-side primary winding and that of the d-side. Therefore, there is a cur-rent difference between the two sides of trans-former. For this reason, a starlike transformation is carried out to the secon-dary winding of Y-side current transformer ac-cording to the connection mode of d-side primary winding, in order to eliminate the influence of the vector difference and to ensure the correctness of secondary differential protection. |
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| Keywords: | transformer primary wiring connection mode secondary differential protec-tion connection mode |
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