In power system, standard time and power system frequency is key parameters.
在电力系统中,标准时间和系统频率是两个重要参量,如何迅速、准确地获取这两个参数是人们关心的问题,GPS时钟-周波测量仪的设计旨在解决这个问题,本文讲述了它的功能、硬件和软件结构设计。
The frequency in the power system varies stochastically,but this kind of variety has its tendency during a specified period.
提出一种利用时间序列分析方法建立的回归模型，根据该模型可以在线进行递推预测电力系统周波变化趋
The control circuit made up of double monostable circuit IC has realized some remarkable functions, such as cycle control, zero crossing trigger, and preventing from repeated and error trigger.
所设计的控制电路 ,利用双单稳电路 IC,实现了点焊过程周波控制、过零触发 ,以及防重触发和误触发功能 ,保证了焊接过程稳定、可靠 。
The paper presents to make use of cycle control for features of autocycle on- off control on ac primary feed side and implementing principle circuit.
本文介绍了利用周波控制技术对交流一次供电侧进行自动循环通断控制的特点及原理电路。
The method of preventing of the electric system in condition of low cycle and the disserving of it were introduced for electric system of Jincheng coal industry group.
本文结合晋城煤业集团公司电力系统 ,分析了电力系统在低周波下运行的危害、防止方法 ,针对安装使用ZPJH装置在晋煤集团电力系统的安全运行中存在的问题 ,提出了解决对