1)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
英文短句/例句
1.The Cooperative Problems in Micro-computer High Frequency Protection;东风110kV微机高频保护配合问题
2.Study on Carrier Protection Channel for 330 kV Lines330 kV线路高频保护通道问题的研究
3.The Development of a Supervisory System for High-Frequency-Protection Special-Purpose Transceivers高频保护专用收发信机监控系统开发
4.High-frequency protection maloperation analysis caused by receiver with high-level一起收信电平过高引起的高频保护误动分析
5.Analysis on two Malfunctions of High Frequency Protection in Hebei Southern Power System and Their Countermeasures河北南网两起高频保护误动作事故分析与对策
6.Study on Comparing Phase Criterion of Operating Component in Phase Differential Carrier Protection;相差高频保护中操作元件比相动作判据的研究
7.Influence of distributed capacity to high frequency protection circuit in the long-distance transmission line远程输电线路分布电容对高频保护的影响
8.Using the new tri-coaxial-cable as connecting cable in high frequency protection channel to improve the anti-jamming ability of high frequency protection was suggested.提出了用新型三同轴电缆作高频通道连接电缆可提高高频保护抗干扰能力的建议。
9.Research on the application of the cooperation about high-frequency protection and transceiver in Turpan 220kV power grid lines吐鲁番电网220kV线路高频保护与收发信机配合现场应用探讨
10.Key Techniques on Protection of High Voltage Converter Speed Regulation高压变频调速保护装置关键技术分析
11.Detection of the Protection Principles for EHV Transmission Line Based on Transient Energy;基于暂态高频能量的超高压输电线路保护研究
12.The Realization of High Frquency Block Protection by Utilizing Distance Protection and Carriers距离保护与收发信机配合构成高频闭锁保护的实现方法
13.Applications： Low Voltage, High Frequency Inverters, and Polarity Protection Applications.主要用途：低电压整流，高频转换开关和极性保护。
14.Research on the Turn-off Transient Behaviours and Protection Circuits of IGCT Used in 6kV High Voltage Variable Frequency Drives;6kV高压变频器功率器件IGCT特性及保护回路研究
15.Case analysis of carrier protection equipment with split-phase channels高频分相允许式保护装置的应用实例分析
16.Series Multi-level Unit High Voltage Converter on the Protection of Grounding单元级联多电平高压变频器接地保护之探讨
17.Research on Security of UHF Mobile RFID Systems Based on Privacy Protection基于隐私保护的超高频移动无线射频识别(RFID)系统安全性研究
18.upper and lower adjacent channel protection margins上、下邻频道保护裕度
相关短句/例句
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。
3)carrier protection高频保护
1.Cause analysis on disturbing the carrier protection s normal operation and countermeasure;影响高频保护正常投入的原因分析及对策
2.Main protections of 220 kV line often adopt carrier protection in China.目前我国 2 2 0kV线路主保护常采用高频载波保护 ,在新建、扩建及保护更改工程中必然会涉及到线路两侧不同型号、不同原理的高频保护能否配合工作的问题。
3.Malfunctions of carrier protection caused by signal interference in carrier protection channel are common problems.高频保护通道信号受到干扰而导致高频保护不能正常工作是常见的问题。
4)carrier protection载波保护，高频保护
5)high frequency protection against disturbance高频保护抗干扰
1.Discussion of high frequency protection against disturbance for substation;变电所高频保护抗干扰问题的探讨
6)carrier protection channel高频保护通道
1.Study on the fault detecting in carrier protection channel;高频保护通道故障监测方法的研究
延伸阅读
甚高频和超高频多普勒雷达 工作在30～3000兆赫频段的气象多普勒雷达。一般具有很高的探测灵敏度。因探测高度范围可达1～100公里，所以又称为中层-平流层-对流层雷达 (MST radar)。它主要用于探测晴空大气的风、大气湍流和大气稳定度（见大气静力稳定度）等大气动力学参数的铅直分布。 原理 这类雷达通过以下几类电磁波和大气的相互作用,对晴空大气进行探测:①由大气湍流运动引起的折射率不均匀结构对电磁波的散射；②稳定大气分层结构对入射电磁波的部分反射；③有时出现于中层大气的自由电子对电磁波的散射；④中层大气中的流星余迹散射。散射体积内空气的运动，使雷达回波具有多普勒频偏。 结构 MST 雷达的结构和气象多普勒雷达大致相同。其特点在于：它们一般配备了大型天线（天线阵），有些甚高频段雷达的天线阵，尺度达 30～200米，采用半波振子阵或八木天线振子阵，以相控方式实现波束扫描。超高频段雷达采用直径几十米的可动抛物面天线，这类雷达的发射功率在几百千瓦至 2兆瓦之间，发射功率和天线面积的乘积值在106～1010瓦·米2之间。此外，为获得高灵敏度和高空间分辨率，在脉冲发射体制和回波数据处理方面，也采取一些技术措施。 用途 利用回波的多普勒频谱可以进行下述各项测量：①探测大气风场的铅直分布。同一仰角，空间分辨率约为 150～1000米，采用脉冲压缩技术后，分辨率已可达到15米。②探测大气湍流结构。可以给出平均折射率湍流结构常数(C厒)的铅直分布。再引入一些大气湍流模式后，可以推算出湍流耗散率的铅直分布。③探测对流层顶高度及逆温层的高度和厚度。目前，甚高频和超高频多普勒雷达还只能测定上述气象要素的铅直廓线及其时间变化，而不能给出三维空间分布资料。 参考书目 K.S.Gage，B.B.Balsley,Doppler Radar Probing of the Clear Atmosphere,Bulletin of American MeteorologicalSociety,Vol.59，No.9，pp.1074～1093，1978.
