A new method be gived to measure MOA′s resistive fundamental harmonic leakage current(RFHC)by over-zero & harmonic analysis methods accurately.
给出了采用过零法和谐波分析法相结合来精确测量金属氧化物避雷器（MOA）阻性电流基波的新算法。
These disadvantages could be eliminated in three-phase systems if the energy account based on the integral of the active power of the positive sequence component with the fundamental harmonic.
在三相系统中，以正序基波功率的积分作为计量标准，同样可以消除这两方面的不利影响。
The chords the students liked best have frequencies with that harmonic relationship, too - all the frequencies are integer multiples of a common fundamental frequency.
大学生们喜爱的和弦也都有着最好的谐振关系——所有的谐振频率都是一个常见基频的整数倍数。
The active filter acts as an infinite impedance to the external for the fundamental frequency and as a low resistor for harmonic frequencies.
对外电路而言，在基波频率下有源滤波器被控制为无限大阻抗，在谐波频率下被控制为小电阻。
Based on the decoupling of fundamental power flow and harmonic power flow, a separate iteration method for calculating three-phase asymmetrical harmonic power flow in power system is presented.
以基波潮流和谐波潮流的解耦性为基础，提出了一种将电力系统三相不对称基波潮流和谐波潮流分离迭代的计算方法。
Then, the calculation formulas of the fundamental and steady harmonic as well as pulse harmonic electromagnetic powers are derived.
导出了基波电磁功率、稳定谐波电磁功率及脉动谐波电磁功率的计算公式。
The calculation formulas of the fundamental and steady harmonic and pulse harmonic electromagnetic torques have been derived.
导出了基波电磁转矩、稳定谐波电磁转矩及脉动谐波电磁转矩的计算公式。
A new type series active power filter based on the fundamental magnetic potential self-balance and harmonic counteraction is proposed and its construction and operating principle is formulated.
本文在阐述滤波器基本原理的基础上，提出一种新型的基于基波磁势自平衡谐波抵消式原理的串联混合有源电力滤波器。
A new type series active power filter based on fundamental magnetic potential self-balance and harmonic counteraction is proposed.
提出一种新型的基于基波磁势自平衡谐波抵消式串联有源电力滤波器。
Fundamental wave and harmonic condition can be found clearly by analyzing the distortion signal using the sub-module of harmonic analysis.
利用谐波分析子模块对畸变信号进行分析，较直观地得出基波和谐波情况。
Theoretic analysis and field measurement results indicate that the consumer watt hour should not be the energy consumed actually but the fundamental energy in consideration of harmonic energy loss.
理论分析和现场实测结果表明，考虑到电网谐波能耗时，所有电力用户的计费电量应是该用户从电网吸收的基波电能量，而不应是用户实际消耗的电能量。
Objective: Compared to fundamental imaging (FI), we used native tissue harmonic imaging (NTHI) to improve image quality on regional wall movement of left ventricle in coronary disease.
目的：通过与基波成像(FI)的对比，研究自然组织谐波成像(nthi)对冠心病节段运动观察的改善情况。
Methods The image quality of ureter in 169 patients with ureteral calculi was compared between tissue harmonic imaging and fundamental imaging.
方法对169例输尿管结石患者进行基波显像和组织谐波显像对比观察。
Superharmonic imaging is made for biological tissues and compared with the results from fundamental and second harmonic imaging.
对生物组织进行了超谐波成像，并与基波、二次谐波图像对比。
The function of the IGBT inverter is to support utility fundamental voltage and to compensate the reactive power. The MOSFET inverter fulfills the function of harmonic current compensation.
IGBT逆变器的作用是提供基波电压，并补偿无功功率，MOSFET逆变器则实现消除谐波电流的功能。
The second chapter introduced the fundamental theories of harmonic analysis and the main methods of harmonic detection, then made a brief direction of harmonic administration.
第二章介绍了谐波分析的基本原理和谐波测量的主要方法，然后对电力系统的谐波管理作了简要说明。
The first chapter was built on harmonic fundamental concepts, harmonic harm and influence, and then described the present condition.
第一章主要介绍谐波的基本概念，谐波的危害及谐波问题的研究现状。
This paper explained the fundamental reason of harmonics is nonlinear load, expounded the harm of harmonic.
介绍了谐波产生的根本原因是非线性负载，阐述了谐波的危害。
The firth chapter was built on harmonic fundamental concepts, harmonic harm and influence, and then described the present condition and significance of harmonic study fault data recording.
第一章主要介绍谐波的基本概念，谐波的危害及谐波问题与故障录波装置的研究现状。
The harmonic image and fundamental image are decomposed into sub-images with wavelet transform. Fusion is completed with rules based on Windows. Then fusion image is reconstructed.
利用小波变换理论首先将谐波图像与基波图像进行分解，然后利用基于窗口的融合规则进行融合，最后利用小波逆变换重建图像。
Difference absorption measurement and wavelength modulation harmonic measurement are two fundamental approaches for gas light absorption detection.
差分吸收检测和波长调制谐波检测是气体光吸收检测的两种基本方法。
The fundamental current can be reconstructed by transformation while the harmonic current can be gained by subtracting fundamental components from the original current.
再经过变换得到原电流的基波分量，从原电流中减去基波分量得到要检测的谐波分量。
Therefore, the secondary winding of transformer extracts harmonic energy without fundamental reactive power, which becomes applicable fundamental frequency power via frequency converter.
使二次侧绕组提取到不含基波无功的谐波电能，并经过变频装置变为可直接利用基频电能。
By using the instantaneous reactive power theory, a kind of improved method in detecting harmonic and fundamental reactive power based on wavelet analysis is (proposed.)
在小波分析的基础上，结合瞬时无功功率理论，提出了一种谐波和基波无功检测的改进方法。
The counteracted current by going through the notch filter based on adaptive filter technique is proposed to eliminate the residual fundamental wave and its harmonic wave.
文中提出，背景电流抵消后让信号通过基于自适应滤波技术的陷波器，可去除背景中残留的基波及谐波电流的影响。
The study shows that the third-harmonic flux with a certain value added to the fundamental flux can obviously reduce both core loss and excitation current.
文中认为当在变压器基波磁通中加入某一幅值的三次谐波磁通后，能显著地降低铁耗和励磁电流。
The principal pulsating torques arise from the interaction between the fundamental rotating flux and the harmonic rotor currents.
主要脉动转矩是由基波旋转磁通和谐波电流相互作用产生的。
A new method for reducing core loss and excitation current in transformers that utilizes the fundamental principles of third-harmonic flux modulation is proposed in this paper.
本文对变压器节能提出了一个崭新的观点，即通过三次谐波磁场调制机理来降低变压器的铁耗和励磁电流。
The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
复杂振动中频率最低的成分(基频或一次谐波)。
The component having the lowest frequency in a complex vibration (fundamental frequency or first harmonic).
复杂振动中频率最低的成分(基频或一次谐波)。
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