After deeply studied in the fast Fourier transform (FFT) method, this paper presents an improved FFT algorithm considering the half-wave symmetric characteristic of power system signals.
在深入分析快速傅里叶变换(FFT)方法的基础上，针对一类电网信号具有半波对称性的特点，提出了一种改进的FFT算法。
Because complex wavelet transforms can exactly identify amplitude and phase information in signal to be dealt with, they are suitable for detection of fault signals in power system.
复值小波变换能准确分辨出信号中所包含的幅值信息和相位信息，因而，适用于电力系统的故障信号的检测。
A novel fundamental frequency and initial phase detection method based on DSP is proposed, which can be used to get synchronous fundamental frequency voltage or current signals of power system.
提出了一种基于数字信号处理器的基波相位和频率校正检测方法，可用于电力系统中电压或电流基波分量同步信号的获取。
How to analyse this kind of signals and draw out their features to develop new protection device is an important research domain in the protection technology of power system all the time.
如何对这类信号进行有效分析，提取其特征，开发新型的保护装置，一直是电力系统保护技术中的重要研究领域。
Although wavelet transforms (WTs) are being used to process fault signals of power system widely. Wavelet transforms can only filter white noises and are useless to filter colored noises.
小波变换在电力系统的故障信号处理中得到广泛地应用，然而，小波变换只能消除白色噪声，对有色噪声不起作用。
The power system stabilizer (PSS) on water turbine does not work normally because of the influence of interference signals.
水电机组加装电力系统稳定器p SS，经常受到干扰信号影响而无法正常投运。
This method can be applied to de-noising for transient signals of power system faults, making the faults easily identified.
应用该方法对电力系统故障暂态信号进行消噪处理，从而更有利于故障的检测与识别。
The results show that this testing system is fit for the test of DC signals, lower frequency signals and Power Frequency signals.
结果表明，该测试系统不仅适合于直流信号的测试，而且同样适合于低频信号、工频交流信号的测试。
Conventional power system stabilizer (PSS) adopting local generator signals is not sufficiently effective to enhance the damping of the system.
传统的电力系统稳定器(PSS)采用本地机组信号，不能有效提高系统阻尼。
Two starting out signals of the DSP control system is used to realize switching power supply's soft start.
此电路采用基于DSP控制系统的两路开出信号来实现开关电源的软启动。
According to the theory of testing abrupt signals with wavelet transformation, the abrupt signals of current and voltage can be quickly detected when power system faults occur.
利用小波变换检测突变信号的原理，可以在电力系统故障发生的瞬间快速检测出电流或电压突变信号。
System hardware circuit audio digital signal source achieve this functions: sound signals, sound intensity level control, data communications, liquid crystal display, alarm and power.
系统硬件电路包括音频数字信号源实现声音信号产生、数字声强级控制、多机数据通信、液晶显示和电源等模块单元。
The phase difference often needs to be measured between two signals with the same frequency in power system, such as power voltage and power current signals.
在电力系统中常常需要对两个同频率信号(如工频电压和工频电流)之间的相位关系进行准确的测量。
The principal drawback of the OFDM systems is that the Peak-to-Average envelope power Ratio (PAR) of its signals may be very high. A high PAR may cause many problems in system design.
OFDM的一个主要缺点是峰均功率比特别高，而高的峰均比会对系统的设计带来很多问题。
Main Course: Computer control and system, Signals and Systems, Electric power test technology and system and so on.
主讲计算机控制与系统、信号与系统、电力测试技术与系统等课程。
The conventional sequence system of the power plant is only to control the single equipment and the supporting facility or among the on-off signals of several equipment.
传统电厂的顺控系统只是控制单台设备及其辅助设备的启停或是几个设备之间开关量的控制。
The conventional sequence system of the power plant is only to control the single equipment and the supporting facility or among the on-off signals of several equipment.
传统电厂的顺控系统只是控制单台设备及其辅助设备的启停或是几个设备之间开关量的控制。
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