1) harmonic quantity
周期量，谐波量
2) harmonic period
谐波周期
3) harmonic measurement
谐波测量
1.
The introduction of harmonic measurement in power system;
电力系统谐波测量方法简述
2.
A noted method to advance accuracy in harmonic measurement;
一种提高谐波测量精度的新算法
3.
Application of multi-layer feedforward neural network for electric syste m harmonic measurement;
多层前馈神经网络在电力系统谐波测量中的应用
4) harmonic analysis
谐波测量
1.
In order to improve the precision of power harmonic analysis based on virtual instrument,the windowed interpolation algorithm is introduced and the program is presented based on LabVIEW.
为了提高虚拟仪器测量电力系统谐波的精度,研究了电力系统谐波测量非同步采样加窗插值算法的原理,给出了用LabVIEW系统实现该算法的具体程序,并进行了仿真验证。
2.
A new harmonic analysis method for electric power systems based on triangle basis functions neural network was presented,the convergence theorem of the algorithm was proposed,and a window function and interpolation algorithm were employed to correct the frequency of fundamental waves.
提出了一种新的基于三角基函数神经网络的电力系统谐波测量方法,给出了该神经网络算法的收敛定理,并采用加窗插值算法修正基波频率的准确度。
3.
This makes it come true to do the harmonic analysis of electrical power system on personal computer.
简述了电网谐波测量非同步采样加窗插值算法的原理,给出了用Matlab系统实现该算法的具体程序和仿真方法,仿真结果表明,用Matlab实现该算法准确性高,实现方便,能快速地在普通PC机上完成信号的频谱分析。
6) harmonic component
谐波分量
1.
Detecting for fundamental positive,negative sequence and harmonic components based on two-dimension fan-in transfer vector;
基于二维扇合矢量的基波正序、负序及谐波分量检测法
2.
Null position residual voltage was mainly composed of fundamental wave and asymmetrical harmonic component.
就信号电机的零位剩余电压从机理上进行分析,零位剩余电压主要由基波分量及谐波分量组成;零位剩余电压产生的主要原因是铁心涡流磁滞的不均匀性,以及加工中造成的不对称性。
3.
From the band-pass property of wavelet function,a non-sinusoidal current signal is detected based on wavelet transform under different scales,the fundamental and harmonic components in the signal and their RMSes are obtained thereby.
从小波函数的带通性质出发,利用小波变换在不同尺度下对非正弦电流信号进行检测,由此得出了它的基波和谐波分量及其有效值。
补充资料：谐波
谐波
harmonics
(harmonies)频率为基波频率整数倍的正弦波分量，又称高次谐波。在交流电路中.具有非线性阻抗特性的电气设备(见非线性负荷)向电源反馈高次谐波，导致电力系统电压、电流波形崎变，使电能质盘变坏。近年来，由于电力电子技术的发展，大量换流设备、电子设备等具有非线性阻抗特性的电气设备接人电力系统，造成谐波污染。这些电气设备称之为谐波源，主要有电力机车、电弧炉、整流器、变频器、逆变器、相控调速和调压装置、电焊机、感应加热设备、气体放电灯以及有磁饱和现象的机电设备。 谐波的危害性表现在干扰通信线路，使同步发电机额定输出功率降低，感应电动机功率因数下降、转矩降低、损耗增加，变压器温度升高、效率降低，加速电气设备绝缘介质老化，使用寿命缩短，甚至损坏，控制保护及枪侧装t工作精度、可靠性降低等。 谐波限制标准见供电质童。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条