1) LFO propagation features
低频振荡传播
2) low-frequency oscillation
低频振荡
1.
Research on low-frequency oscillation of Hunan power system under inter-connected state power gird;
全国联网条件下湖南电网低频振荡的研究
2.
Select swing curve to distill low-frequency oscillation information;
选择合适的曲线提取低频振荡信息
3.
Load characteristics effect on low-frequency oscillation damping of power systems;
负荷特性对电力系统低频振荡阻尼的影响
3) low frequency oscillations
低频振荡
1.
On the basis of the research results of Hilbert-Huang Transform and the application of it to the field of power system signal analysis in recent years,this paper summaries the study of power quality analysis,the harmonic identification,power system low frequency oscillations,parameter identification of synchronous machine,the partial discharge(PD) signal monitoring.
主要根据本课题组近几年Hilbert-Huang变换(HHT)理论及其在电力系统信号分析领域应用的研究成果,综述了HHT理论在电能质量检测、电力系统谐波分析、电力系统低频振荡、同步电机参数辨识、局部放电信号检测等问题的应用,并探讨了HHT理论应用的进一步研究的方向:低频振荡在线分析,同步电机参数辨识精度的提高,窄带噪声、随机脉冲等干扰下的局部放电信号在线检测等问题。
2.
The frequent and massive power exchange on tie-line between different areas makes the low frequency oscillations, especially in the inter-area mode it is more serious, and it impairs system stability and its performance.
为了对系统的振荡模式有一全面了解,根据系统所依据的数学模型介绍了各种常用的低频振荡分析方法及最新发展趋势,论述了一次系统所采用的各种抑制振荡措施及其优缺点,并提出了一种新的稳定控制思路。
3.
This paper introduces a novel method-HHT which is invented to deal with non-stationary signal to the analysis of low frequency oscillations.
论文将一种新的非线性、非平稳信号的处理方法- HHT(Hilbert-Huang transform)方法,应用于电力系统低频振荡分析之中。
4) low frequency oscillation
低频振荡
1.
Damping low frequency oscillation after the interconnection of East China and Fujian power grids by adopting TCSC technology;
采用可控串补技术解决华东—福建联网低频振荡问题
2.
Prony analysis of low frequency oscillation based on wavelet pretreatment technology;
基于小波预处理技术的低频振荡Prony分析
3.
Study on two-stage control for Unified Power Flow Controller to damp tie-line low frequency oscillation;
阻尼联络线低频振荡的UPFC两阶段控制方法研究
5) low-frequency oscillations
低频振荡
1.
A preliminary study of low-frequency oscillations of East-Asian tropical monsoon;
东亚热带季风低频振荡的初步研究
2.
For some operating conditions,a synchronous generator with a rectifier and back-EMF load maybe exhibit low-frequency oscillations when the system parameters do not match.
同步发电机整流带反电动势负载时,当系统参数不匹配,在一定工况下,可能出现低频振荡。
3.
On-line oscillation characteristic analysis algorithms are used to monitor on-line low-frequency oscillations for control of wide-area damping.
研究在线的振荡特征辨识算法是实现电力系统低频振荡在线监视以及广域阻尼控制的重要理论基础。
6) LFO
低频振荡
1.
FEATURE ANALYSIS OF SUMMER MONSOON LFO OVER SCS IN 1998;
1998年南海夏季风低频振荡特征分析
2.
Analysis of features of atmospheric LFO structures over the Tibetan plateau in 1998;
1998年青藏高原大气低频振荡的结构特征分析
3.
In the context of the NCAR daily reanalysis data of 1998,this paper investigates the source or sink features of atmospheric LFO (low frequency oscillation) over the Tibetan Plateau in summer 1998.
使用 1 998年美国 NCAR再分析的逐日资料 ,研究了 1 998年夏季青藏高原大气低频振荡的源、汇特征。
补充资料：低频天波传播
| 低频天波传播 low frequency，skywave propagation for 地面发射的频率为30～300千赫的无线电波，经电离层反射再回到地面的传播方式。在白天，反射区为低电离层的D层；在夜间为E层底部。传播距离可达几千千米。低频天波在授时、导航、通信、广播，以及低电离层特性研究方面都有广泛的用途。在太阳宁静期间，无论是在白天还是夜间，天波信号的幅度和相位都比较稳定。太阳耀斑爆发期间太阳辐射很强的X射线，使D层电子密度急剧增加，天波等效反射高度降低，相位急剧超前，幅度也发生变化。对于很大的耀斑，天波相位时延超前10微秒左右，耀斑结束后，天波信号逐渐恢复正常。 |
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