| 应用高压变频器后电动机继电保护新问题 |
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| 引用本文： | 李健,朱彪,梅兴虎,贾胜超.应用高压变频器后电动机继电保护新问题[J].江苏电器,2008(10):21-23. |
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| 作者姓名： | 李健 朱彪 梅兴虎 贾胜超 |
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| 作者单位： | 1. 东南大学,电气工程学院,江苏,南京,210096
2. 宝钢梅山矿业有限公司,江苏,南京,210041 |
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| 摘 要： | 介绍了应用高压变频器对电流互感器测量和电动机差动保护的影响，并就如何消除这些不利因素进行了分析，可用茹可夫斯基线圈系统进行电流测量，解决因频率宽范围变化导致电磁式电流互感器测量不准的问题；还可采用基于采样值差动原理的频率跟踪方案实现差动保护功能。研究电厂应用高压变频器后对电动机继电保护配置和整定的影响，有重要的现实意义。
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| 关 键 词： | 电动机继电保护 高压变频器 采样值差动保护 |
New Issues of Motor Relay Protection After Application of High-Voltage Converters |
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| Authors: | LI Jian ZHU Biao MEI Xing-hu JIA Sheng-chao |
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| Affiliation: | LI Jian, ZHU Biao, MEI Xing-hu, JIA Sheng-chao( 1 School of Electrical Engineering, Southeast University, Nanjing 210096, China 2 Baosteel Meishan Mining Co., Ltd, Nanjing 210041, China) |
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| Abstract: | Introduction was made to the impacts on current transformer measurement and motor differential protection after applica-tion of high-voltage converter,and how to remove these unfavorable factors was analyzed.Rogowski winding system could be applied to carry out current measurement which solved the problem of electromagnetic current transformer's incorrect measurement due to fre-quency fluctuating drastically,and also could adopt frequency tracing method based on sampling value differential principle to achive differential protection function.There is great practical significance to study the impacts on motor relay protection disposition and rec-tification of power plant after application of high-voltage converter. |
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| Keywords: | motor relay protection high-voltage converter sampling value differential protection |
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