| 主变压器差动保护防误动新方法研究 |
| |
| 引用本文： | 习思敏.主变压器差动保护防误动新方法研究[J].机电工程技术,2013(12):37-39,88. |
| |
| 作者姓名： | 习思敏 |
| |
| 作者单位： | 广东电网公司清远供电局 |
| |
| 摘 要： | 通过一起220 kV主变压器空载合闸导致主变差动保护误动作事件,分析了励磁涌流波形和大小,以及主变差动保护误动作的原因。通过采用数学形态学对变压器励磁涌流和内部故障电流波形的比较分析,提出了鉴别二者的判据,仿真结果验证了其可行性,为主变保护装置的运行提供了一些新的借鉴。
|
| 关 键 词： | 变压器 励磁涌流 数学形态学 |
A New Study to Avoid Mal-Operation of Power Transformer Differential Protection |
| |
| XI Si-min.A New Study to Avoid Mal-Operation of Power Transformer Differential Protection[J].Mechanical & Electrical Engineering Technology,2013(12):37-39,88. |
| |
| Authors: | XI Si-min |
| |
| Affiliation: | XI Si-min;Guangdong Power Grid Qingyuan Power Bureau; |
| |
| Abstract: | Through a mal-operation incident of power transformer differential protection,the waveform and amplitude of magnetizing inrush are analyzed,and also the reason to this mal-operation. Based on mathematical morphological algorithm,the inrush and internal fault currents are taken into account in analysis together,and a new criteria is presented,which can be simulated in PSCAD. This new criteria provides a new solution for power transformer protection. |
| |
| Keywords: | power transformer magnetizing inrush mathematical morphology |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
