1) harmonic power measurement
谐波功率计算
2) harmonic power
谐波功率
1.
The virtual computation for harmonic power based on phase difference correcting method;
基于相位差校正法的虚拟谐波功率与电能计算
2.
The direction of harmonic power flow should be understood and the position of harmonic source can be determined according to the direction of harmonic power while harmonics exist in power network.
电力系统中有谐波存在时,应该了解谐波功率的方向,并按谐波功率的方向确定谐波源的位置。
3.
When using the fast Fourier transform(FFT) for harmonic analysis and measurement,the measuring accuracy is apt to get affected owing to the spectral leakage The side-lobe characteristics of Rife-Vincent window are studied and a harmonic analysis and harmonic power measurement algorithm based on Rife-Vincent window phase difference correction is proposed.
研究Rife-Vincent窗的旁瓣特性,提出了一种基于Rife-Vincent窗频谱相位差校正的谐波分析与谐波功率测量方法。
3) Harmonic calculation
谐波计算
1.
In this termination, based on data sampling for power system, many functions such as harmonic calculation, reactive-load compensation, data presentation and remote control have been implemented.
该终端在实现电力数据采集的基础上 ,实现了谐波计算、无功补偿、数据显示和远程控制的功
5) power harmonic source
功率谐波源
1.
Research for circuit of three-phase power harmonic source;
三相功率谐波源控制电路的研制
6) harmonics and reactive power
谐波和无功功率
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