| 1. | How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay
变压器主保护选择差动在原理上存在不足，带来的问题就是如何准确鉴别励磁涌流与内部故障，这也是目前变压器保护的难点。 |
| 2. | The criterion that is based on nonlinear mode of transformers can better reflect the state of transformers that have been proved by academic analysis and empt emulation
该励磁涌流判据采用了变压器非线性模型，能更好的反映变压器的工作状态，论文用理论分析和数字仿真作了详细证明。 |
| 3. | According to the characteristics of inrush current a series of new approaches of discrimination inrush current by utilizing fuzzy set is presented . and then the algorithm of transformer protection is achieved based on 80c196 system
通过研究励磁涌流的特征，提出了利用模糊识别原理来识别变压器励磁涌流，并基于80c196单片机系统编制了保护软件。 |
| 4. | The paper analyses the principles of distinguishing internal faults current from inrush current and their defects at the present time on the basis of investigating widely the existing papers on identification of inrush current
本文在广泛阅读国内外现有的关于变压器励磁涌流识别的文献的基础上，分析了目前区分变压器励磁涌流和故障电流的多种原理及存在的问题。 |
| 5. | In the course of settling new types of transformer microcomputer protection , it is still a key and difficult problem how to prevent protection miss - operating caused by magnetizing inrush when transformer suddenly is closed in no load
在研究新型微机变压器保护过程中，如何防止变压器突然空载合闸时出现的励磁涌流所造成的保护误动作，仍然是最关键和最困难的问题。 |
| 6. | The fast discrimination between magnetizing in - rush current and fault current is a difficulty in transformer protection presently . to solve this problem , second harmonies restraint and dead angle are used widely in practical application
励磁涌流的快速鉴别仍然是当前变压器保护面临的一个难点，在实际应用中广泛采用二次谐波制动原理和间断角原理来鉴别励磁涌流。 |
| 7. | In view of this fact , a novel method based on identification of winding parameter is presented , which need not to distinguish magnetizing inrush . simulation results by using emtp and matlab demonstrate the feasibility and availability
该方法能有效的区分牵引变压器内部故障与外部故障、励磁涌流等情况，用emtp及matlab进行仿真计算，验证了该方法的可行性和有效性。 |
| 8. | In order to meet needs of reliability and speediness of power transformer protection , and to have protection blocking reliably in the presence of magnetizing inrush current , the wavelet transform is applied to the discrimination between inrush current and fault current
本文把小波变换应用于励磁涌流的鉴别，详细探讨了用小波变换来区分励磁涌流和故障电流的具体方法，提出了两种比较适用于工程实际的方法。 |
| 9. | The extending techniques such as vector transform ， excitation inrush current , ta saturation and so on are analyzed , which resolves the question that the traditional optical differential protection can not satisfy the request of line - transformer unit
同时对光纤差动保护运用于线路变压器组时涉及的矢量变换、励磁涌流、 ta饱和等延伸技术进行了分析，解决了传统的线路光纤差动保护不能满足线路变压器组保护的要求。 |
| 10. | Magnetizing inrush current has obvious singularity , and wavelet transform has multi - scale and good time - frequency local characteristic , that it is particularly well adapted to extract the characteristic of signal ' s edge and peak value , and can check up the singularity well
变压器励磁涌流具有明显的奇异性，小波变换具有多尺度分析和良好时频域局部化特性，适合提取信号边缘和峰值突变的特征，能够很好的检测信号奇异性。 |
