| 异步法电流互感器饱和判别新原理及其应用 |
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| 引用本文： | 沈全荣,严伟,梁乾兵,郑玉平. 异步法电流互感器饱和判别新原理及其应用[J]. 电力系统自动化, 2005, 29(16): 84-86 |
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| 作者姓名： | 沈全荣 严伟 梁乾兵 郑玉平 |
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| 作者单位： | 南京南瑞继保电气有限公司，南京南瑞继保电气有限公司，江苏镇江发电有限公司，南京南瑞继保电气有限公司 江苏省南京市 211100，江苏省南京市 211100，江苏省镇江市 212413，江苏省南京市 211100 |
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| 摘 要： | 介绍了异步法电流互感器(TA)饱和判别新原理,结合现场录波分析表明:在机组内部故障时,制动电流工频变化量和差电流工频变化量同步出现,而外部故障TA饱和时两者异步先后出现。差动保护与此判据结合,可以明确区分TA饱和与内部故障。
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| 关 键 词： | 电流互感器饱和 异步法 工频变化量 比率差动 |
| 收稿时间： | 2005-03-03 |
| 修稿时间： | 2005-03-03 |
Asynchronous Method for the Recognition of Current Transformer Saturation and Its Application |
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| Shen QuanRong;Yan Wei;Liang QianBing;Zheng YuPing. Asynchronous Method for the Recognition of Current Transformer Saturation and Its Application[J]. Automation of Electric Power Systems, 2005, 29(16): 84-86 |
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| Authors: | Shen QuanRong Yan Wei Liang QianBing Zheng YuPing |
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| Abstract: | This paper describes an asynchronous method for the recognition of current transformer saturation. By analyzing the actual wave recorded, it is shown that the deviation of the differential current in power frequency will be synchronous with that of the restraint current when internal fault occurs and the former will lag behind the latter when external fault with current transformer saturation occurs. With the combination of the differential protection and the asynchronous method based on the above characteristic, the differential protection can distinguish the external fault with current transformer saturation from the internal fault. |
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| Keywords: | current transformer saturation asynchronous method deviation in power frequency differential protection |
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