1) underfrequency protection
代频保护
2) carrier frequency protection
载频保护
3) high frequency protection
高频保护
1.
Malfunction analysis and improvement measure of closed abrupt direction high frequency protection on closing the ring;
系统高频保护误动作分析及改进措施
2.
Discussion of high frequency protection against disturbance for substation;
变电所高频保护抗干扰问题的探讨
3.
The analysis for false action of high frequency protection and its anti - accident measure;
高频保护误动原因分析及反事故措施
4) guard band
保护频带
1.
For the OFDM(orthogonal frequency division multiplexing) systems with guard band,the permissible biggest guard bandwidth is computed on the bases of the conventional UPPTS(uniformly placed pilot tones sequence) design and the premise that the MSE(mean square error) of the LS(least square) channel estimation must be minimum.
针对设置有保护频带的OFDM系统,基于等间隔导频(UPPTS)设计方法,在保证最小二乘(LS)信道估计均方误差(MSE)最小的前提下,计算了系统允许存在的最大保护频带宽度,给出了初始导频位置的选择范围,通过调整导频序列的初始位置,使导频序列有效避开保护频带。
2.
To avoid guard band, the domain of initial pilot placement and the maximum guard bandwidth were proposed.
针对设置有保护频带的MIMO-OFDM系统,还给出了最优导频序列初始导频位置的选择范围,使导频序列有效的避开保护频带,并计算了系统最大可能存在的保护频带宽度,仿真实验验证了算法的有效性。
5) high-frequency protection
高频保护
1.
Analysis of abnormal operation of 220 kV high-frequency protection and its countermeasures;
220 kV系统高频保护异常运行分析及预防措施
2.
In 220 kV election power system,application of high-frequency protection based on microcomputer is very extensive,and whether its action is right or not directly relative to electric power network s safe operation.
微机高频保护在220 kV电网系统中应用广泛,其正确动作与否直接关系到电网的安全运行。
3.
The LZ96 high-frequency protection was used as the quick motion main protection in the whole transmission line.
采用LZ96高频保护作为全线速动主保护的输电线路,在母线PT故障时产生很强的噪声干扰,导致高频保护错误动作。
6) low frequency protection
低频保护
1.
The paper introduced the hazard of large turbine generator operation under abnormal frequency and technical requirements and criteria for low frequency protection.
介绍了大型汽轮发电机组频率异常运行的危害和对低频保护的技术要求及准则;提出了低频保护的设计方案(包括频率保护和频率累积保护),并结合一个实际工程说明了低频保护的应用。
补充资料：工频突变量方向比较式纵联保护
工频突变量方向比较式纵联保护
direction comparison pilot protection system using sudden change of power frequency component
gongPIntub一an}一ong fongx一angb一]loosh一Zongl一an boohu工颇突变t方向比较式纵联保护(d ireetioneomParison pilot protection system using suddeneharge of power fr阅ueney eomponent)见方向比校式纵联保护。
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