| 提高微机变压器差动保护可靠性的研究 |
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| 引用本文： | 骆健,丁网林,王鹃. 提高微机变压器差动保护可靠性的研究[J]. 水电自动化与大坝监测, 2006, 0(10) |
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| 作者姓名： | 骆健 丁网林 王鹃 |
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| 作者单位： | 南京中德保护控制系统有限公司， 江苏省南京市 210003 |
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| 摘 要： | 指出变压器差动保护装置容易误动和拒动的几个原因，并结合电气量的物理特征分析法、各侧电气量综合分析法和图形分析法，对变压器差动保护中采样异常、电流互感器饱和等关键问题进行深入分析，提出了解决的办法，同时从理论上证明了区内故障时差动电流和零序电流之间存在一定关系，利用这种关系可以可靠防止变压器差动误动。
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| 关 键 词： | 差动保护； 电气量物理特征； 综合分析法； 图形分析法； 电流互感器饱和 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 1900-01-01 |
Research on Improving Reliability of Transformer Differential Protection |
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| Affiliation: | Nanjing Sino-German Protection & Substation Control Systems Ltd, Nanjing 210003, China |
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| Abstract: | This paper analyzes the causes of mal-operation in transformer differential protection. By referring to the analysis of the physical characteristics of electric quantities, the integrated analytical method for electric quantities on all sides and graphics analytical method, key problems about sampling abnormality and current transformer saturation are thoroughly analyzed and measures are presented. The definite relationship between the differential current and zero sequence current during internal fault is proved in theory, by which the mal-operation of transformer differential protection can be reliably prevented. |
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| Keywords: | differential protection physical characteristics of electric quantities integrated analytical method graphics analytical method current transformer saturation |
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