查询词典 broadcast relay

The communication systems wildly used nationally and internationally, such as audio frequency wire communication, carrier-current communication, micro-wave communication, optic-fiber communication, expanding frequency communication and satellite relay communication, are investigated in detail. The different communication systems used in Changsha County electric power systems are analysed in detail.

对目前国内外使用较多的一些通信方式如音频线通信、载波通信、微波通信、光纤通信、扩频通信、卫星帧中继通信等进行了较为深入的分析和研究；对目前长沙电力局正在使用的变电站与调度端的通信方式——进行性价比方面的分析比较，综合以上，得出了最为合适的变电站到调度端的通信方式。

Mark needle ; phase and frequency correct PWM mode ; high frequency electromagnetic valve ; DC relay ; ATmeag16; CH341T

标记针；相频修正PWM模式；高频电磁阀；直流继电器； ATmeag16； CH341T

The best output load frequency of AC solid state relay list in this manual is below 60Hz(such as power frequency 50Hz).

本册说明书所列交流固态继电器最佳输出负载频率为60hz以下（如工频50Hz）。

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 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。

At first the Digital frequency shifting repeater transforms the original signal to the 70MHz IF signal in the donor, then the Frequency shift relay digital processing unit Digital Spread Spectrum the IF signal and through the 5.8GHZ signal to transmit to the remote end.

数字移频直放站首先在近端机内将将信源信号转换为数字70MHZ中频信号，通过&移频中继数字处理单元&将中频信号数字扩频后通过5.8GHZ的信号传送到远端。

The device adopts 80C196 microprocessor as the CPU of relay; the frequency measurement unit employs hardware to measure frequency, the measurement precision is higher; the under-frequency disconnection unit has perfect, reliable blocking measure to prevent mal-operation; the under-voltage disconnect unit has reliable criteria to detect three phase voltage failure.

采用80C196高性能快速单片机为保护CPU，频率测量单元运用硬件测频，测量精度高；低周解列单元设有完善可靠的防止误动作的闭锁措施；低压解列单元具有可靠的三相TV断线闭锁判据。

PYX1-S type signal power supply panel is a special equipment for eight in formation automatic block with audio frequency shift modulated track circuits.It can supply power for signal lighting,track circuit,audio frequency shift relay circuit,approaching circuit,audio frequency shift control and detecting circuit.

PYX1-S型八信息移频电源屏是八信息自动闭塞的配套设备，可为信号点灯、轨道电路、移频继电器电路、接近电路移频控制检测电路提供电源。

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。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。