查询词典 frequency relay

And primarily proceeded analysis of the basic activity principles of frequency relay and divergence relay as well as their application fields. This testing software is based on these theories.

进而主要分析了频率继电器和差动继电器的应用场合及动作的基本原理，以此编写了测试软件。

RP-type resistor-PQHY-type pan with a frequency relay control panel control.

RP型电阻器-PQHY型带频率继电器的平移控制屏控制。

The reason why secondary power model damage and high frequency relay disoperation usually has been explained, and the suggestions of protection and research are put forward. Systemic experimental study of waveform shape and frequency spectrum distribution of pulse electric field and pulse magnetic field is conducted with manufactured measuring systems. Waveform shape and frequency spectrum of pulse electric field and pulse magnetic field at different place including different impulse voltage and different gap are studied.

使用研制的测量系统对冲击电压放电产生的脉冲电场和脉冲磁场进行了系统的实验观测，得到了较为全面的不同电压、不同放电间隙和不同观测位置的脉冲电场和脉冲磁场的波形和频谱特征，研究了脉冲电场和脉冲磁场与冲击电压、间隙大小和高度的关系，研究了冲击电压放电产生的脉冲电场、脉冲磁场的分布特点等。

The radio frequency performance curves of relay were obtained through simulation, and analysis of the equivalent circuit and the main factors which influence the insertion loss, voltage stand wave ratio and isolation of relay were discussed.

对其进行仿真分析得到继电器射频(radio frequency，RF)性能曲线，并讨论了影响继电器插入损耗、电压驻波比及隔离度的主要因素。

The necessity and the application of over current protection during start-up course are discussed. gas turbine generator ; start-up with varied frequency ; SFC ; overcurrent with protection low frequency ; relay protection

此外，还有一种观点认为：在变频起动过程中如果发电机定子回路及其引出线发生相间短路，由于变频起动装置内部的可控硅作用，能

The measuring systems are successfully used in the electromagnetic pulse measurement generated by impulse voltage discharge and switch operation in 500kV substations. Full waveforms of transient electric field, transient magnetic field, transient voltage of high frequency relay channels and low voltage alternative current power during switch operation period have been obtained, and the fast transient pulses in high frequency relay channels and AC power have been caught.

将该套测量系统成功地应用于500kV变电站开关操作产生的电磁脉冲的研究中，得到了开关刀闸操作时暂态电场、磁场、高频通道、交流电压等的完整波形，发现低压交直流电源系统和高频保护通道中存在非常严重的脉冲群干扰，初步解释了变电站二次电源模块经常损坏和高频保护经常误动的原因，提出了加强保护和研究的建议，进一步验证了测量系统的先进性。

The equivalent circuit of signal path of high frequency relay was built by extracting the parasitic capacitance, inductance and resistance of signal path, based on the classical transmission line theory and partial element equivalent circuit method.

通过经典传输线理论及部分元等效电路(partial element equivalent circuit，PEEC)方法，对高频继电器常闭型信号传输路径的分布电容、电感、电阻等参数进行提取，建立信号传输路径的等效电路模型。

In MicroGrid if traditional synchronous generators were used as the main power support, the frequency of MicroGrid would fluctuate greatly during MicroGrid operated from isolated mode to grid-connected mode, and some distributed generations maybe were disconnected from the grid by low frequency relay.

如果选择微型燃气轮机作为微网的主要功率支撑手段，在微网从并网向孤网过渡过程中，系统频率波动较大，且部分分布式电源有可能在低频保护动作下与电网隔离，不利于微网的稳定运行；增加储能设备后，储能设备对于微网的稳定运行可发挥重要的作用。

Stochastic factors associated with generator frequency relay, u.f. load shedding and breaker tripping time, etc. are explicitly modeled. Using a Monte Carlo simulation tool, the risk of frequency-induced cascading failures is assessed.

该模型用以研究电力系统短期频率随机动态特性，考虑了机组频率保护、低频减载装置以及元件切除时间等随机因素，并基于蒙特卡罗模拟方法分别予以分析。

FR? Frequency Relay?

频率替续器

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。