1) comparison of positive and negative frequency active frequency drift
正反频率比较主动频率偏移法
2) active frequency drift(AFD)
主动频率偏移(AFD)
1.
On the basis of traditional active frequency drift(AFD) method,an improved islanding detection method is presented adopting the pulse current amplitude disturbance.
在分析传统的主动频率偏移(AFD)法基础上,提出一种适时施加脉冲式电流幅值干扰的组合式改进方法,重点讨论幅值干扰施加的方式,特别是施加时间的选取。
3) SMS
[英][,es em 'es] [美]['ɛs 'ɛm 'ɛs]
滑动频率偏移法
1.
The Application of SMS in Household Island Detection;
滑动频率偏移法在户用光伏孤岛检测中的应用
5) comparison frequency
比较频率
6) Frequency deviation
频率偏移
1.
According to the fundamental principle of correlation function,the effe ct of measuring accuracy resulting from frequency deviation is analyzed in this paper.
从相关函数的基本原理出发,分析了频率偏移对信号测量准确度的影响。
2.
On the basis of high precision requirement for input signals in the power system protection and control system,this paper,only for the influence of power system frequency deviation on extracting fundamental harmonic,studies the amplitude error of Fourier algorithm,presents a method of correcting frequency deviation,and further derives the formulas of improved Fourier algorithm.
针对电力系统微机保护和控制系统对输入信号精度的要求 ,研究了电力系统频率偏移对傅立叶算法的影响 ,提出一种消弱频率偏移影响的方法 ,并推导出校正频率偏移的改进傅立叶算法 。
3.
As for digital self excited control system for use with synchronous generator, this paper analyses the influence of power system frequency deviation on automatic excitation regulator, derives the rule of voltage error varying while system frequency deviates from normal rating and presents a kind of correcting method.
本文针对数字式同步发电机自并励静止整流器励磁控制系统 ,研究了电力系统频率偏移对励磁控制的影响 ,导出了调节励磁电压的误差随频率偏移的变化规律 ,并提出了对励磁调节误差进行校正的方法。
补充资料：主动
①不靠外力促进而自动：主动关心同学。②能够由自己把握：争取主动。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条