| 1. | Approach of fault location and fault phase selection in uhv power transmission line based on the wavelet theory
基于小波理论的超高压输电线路故障定位与选相方法 |
| 2. | Now these functions are realized by electronic circuit and got used widely in phase selection devices
目前广泛采用的选相分合闸机构，大多由电子线路实现上述功能。 |
| 3. | In addition , this paper also introduces and analyzes fuzzy comprehensive evaluation which is used in phase selection
此外，本文还介绍并分析了模糊综合评判的方法在交流电器选相分合闸控制中的应用。 |
| 4. | The control technology of phase selection has been used on beaker ' s instantaneous characteristic test device for jiang su chang shu switch plant . the precision is ?
采用上述技术研制的选相分合闸装置，应用于断路器瞬动特性试验设备中，选相精度为1 ，较好地消除了试验中的暂态电流。 |
| 5. | But there are still some problems in the aspects of economy and credibility , even if using cpu may bring the calculational problems . this paper mainly presents the technology of phase selection
所以，无论从交流电磁电器的工作特性还是其他试验要求来看，都希望有精度高、使用方便的选相分合闸装置。 |
| 6. | In order to eliminate the transient current and ensure the test precision , this paper introduces the principle and the method of phase selection of the ac based on fft ( fast fourier transform algorithm )
为了消除暂态电流，本文阐述了一种基于快速傅立叶变换( fft )的交流选相合闸技术的原理以及实现方法，保证了检测精度。 |
| 7. | This paper describes the principle of adaptive reclose and studies some problems in the implemention of the adaptive reclose on the basis of phase selection of the microcomputer relay protector
摘要对自适应重合闸的原理进行论述，并在微机保护故障选相的基础上，探讨了自适应重合闸实施中的几个问题，结合超高压输电线进行了仿真计算。 |
| 8. | A new residual current compensation method based on the magnitude of current of each phase that has the clear phase selection ability is presented in this paper . the residual current is compensated in an adaptive manner
本文中提出一种新的可变补偿的方法，对单相距离测量元件提出了零序电流自适应补偿方法，算法本身带有较强选相功能。 |
| 9. | This paper also introduces two aspects , one is the use of single - chip computer - intel 16bit as key to realize signal collection , data processing and control of phase selection , the other is the communication of mcu and pc realized by universal serial bus ( usb )
选相分合闸装置的设计包括两部分：一是下位机部分，主要以80c196kc单片机及其外围电路为主，完成交流信号的采集、数据处理以及对交流电器分合闸的控制；另一部分是单片机与pc机的通讯部分。 |
| 10. | Firstly , we analyze the transient and steady character of single phase high - impedance grounding fault . secondly , based on wavelet analysis on checking mutational signal and direction high frequency protection theory , utilizing zero sequence current and module current , this paper provides a new scheme including fault starting element , fault phase selection element , directional element and main criterion . this scheme can bear high impedance and is immune to system surge and frequency warp , which gets over the shortcoming of the lack of sensitivity
由于现有的保护方案无法快速有效地切除此类故障，本文在详细分析了单相高阻接地故障的稳态和暂态特性的基础上，从小波分析原理出发，利用小波变换检测突变信号的原理，以零序电流、模电流等为研究对象，结合方向高频保护的原理，设计了一套包含启动元件、选相元件、方向元件、主保护的保护新方案。 |
