A real time method for detecting the fundamental component of the line voltage under distorted circumstance is proposed in the paper.
提出了一种在电网电压畸变情况下依然适用的电网电压基波(分量)的实时检测方法。
Calculating the fundamental component from fault transient signals quickly is a crux of microprocessor protective relay to operate in time.
提出了短窗积分提取基波(分量)法 ,即首先选定采样短窗及其上的一族基函数 ,由此建立积分线性方程组 ,通过解方程组得出基波(分量)的值 ,并给出了理论推证。
This paper discusses the method by which fundamental components are calculated with Wallis function algorithm in computer relay protection, calculates the effect of nonperiodic components on the accuracy of Wallis function algorithm, probes into the measures removing the effect of nonperiodic components, and compares Wallis function algorithm with Fourier algorithm.
本文论述沃尔什函数算法在微机继电保护中计算基波(分量)的方法,计算非周期分量对沃尔什函数算法精度的影响,探讨消除非周期分量影响的措施,并对沃尔什函数算法与傅里叶算法进行比较和分析。
What the subject researching is that power energy should be measured with base wave ammeter to power systematic nonlinear user;And that it is high veracious by base wave AC parameters measurement method to those not bad contaminative.
本课题所研究的问题是针对电力系统非线性负载用户采用基波电度表来计量电能；而对谐波污染不严重的线性用户采用基波交流参数测量的方法仍然具有较高的准确性。
A kind of fundamental wave equivalent circuit of dielectric-barrier discharge ozone generator powered by sinusoidal voltage is proposed.
提出了一种新的正弦电压供电DBD型臭氧发生器基波等效电路,该电路由非线性基波等效电阻Re和基波等效电容Ce简单并联组成。
In the end of 20th century,two main flowings were formed,including the algorithms based on motor s fundamental wave model with Park transformation and the high-frequency injection algorithms with high-frequency injection based on the motor s harmonic model.
无(位置、速度)传感器控制是当前国内外交流电机传动的热点,在20世纪末已经形成了以交流电机的Park方程为基础的基于电机基波模型的无传感器控制和以高频信号注入法为基础的基于电机谐波模型的无传感器控制两大体系。
This paper introduces a method of calibrating and processing angular speed fluctuation in NI sampling system—PXI-6281,it accomplishes the acquisition of angular speed fluctuation by distortion of signal,analyzing fundamental wave,high-order harmonic of angular speed feedback signal,and calculating the amplitude ratio of base-wave and high-order harmonic.
利用N I的PX I-6281高速数据采集卡来完成角速度波动信号的采集,借鉴信号失真度的概念,分析角速度反馈信号的基波和高次谐波大小,求取高次谐波与基波幅值比,作为角速度波动率。
A power quadrilateral consists of apparent power S,active power P,reactive power Q,and distortion power N,or is composed of a fundamental harmonic power triangle and a harmonic power triangle.
功率四边形也可看成是由基波功率三角形和谐波功率三角形组成的。
In this paper, we make use of Fourier series to analyze the fundamental harmonic of the SPWM and make a conclusion that the larger carrier frequency ratio(N) is, the better resolution of modulation is.
本文首先对正弦脉宽调制(SPWM)的基本原理进行了说明,并利用付利叶级数对SPWM 基波进行了分析,得到载波比N 越大调制效果越好的结论,但N 受功率开关器件本身允许频率限制,N 不能过大。
Acquisition of fundamental waveforms based on neural network;
一种基于神经网络的基波(分量)提取方法
A new fundamental waveform electronic watt-hour meter was developed with its designed method proposed.
介绍了一种新型基波电子式电能表的设计方法,分析了电子式电能表的发展趋势,讨论了在谐波存在下电能计量的不准确性,阐述了新型基波电子式电能表的设计方案,电能计量部分确定采用DSP芯片通过软件编程实现。
A new fundamental waveform electronic watt-hour meter is developed.
介绍了新型基波全电子式电能表的设计方法,分析了电子式电能表发展情况和发展趋势,讨论了在谐波存在下电能计量不准确的原因,阐述了新型基波全电子式电能表的设计方案,电能计量部分确定采用DSP芯片通过软件编程实现低通滤波和电能计量,软件采用适于本表计的前后台软件结构。
The PWM inverters are applied to produce fundamental currents, which are injected the multiple compensation secondary windings.
该单元向相应的二次侧注入幅值相同、相位相反的基波电流,在补偿系数等于1或略大于1时,在串联变压器一次侧对基波呈近似为0的阻抗,而对谐波呈现高阻抗,从而迫使谐波流入无源支路。
A practical 3 phase series active power filtering device is investigated based on the principle of the fundamental magnetic flux compensation.
根据基波磁通补偿的滤波新原理研制了一套三相有源电力滤波装置 ,该装置采用 3个独立的串联变压器和 3套独立的逆变器 ,以便应用于实际中可能出现不对称的三相负载。