Harmonic is the most general phenomenon in power system. And harmonic is the main index of power quality.
谐波是目前电力系统中存在的最普遍现象，是电能质量的主要指标。
Harmonic frequencies in the power grid are a frequent cause of power quality problems.
谐波频率在电网中是造成电能质量问题的常见原因。
After SVC was put into operation, power quality problem caused by harmonic current, voltage fluctuation and flicker has been solved.
SVC投入运行后，对非线性负荷产生的谐波电流，电压波动及闪变等引起供电电能质量的问题起到了很好的治理效果。
Active power filter is used for dynamic harmonic suppressing and compensation reactive current, which can effectively improve power network quality.
有源电力滤波器用于动态抑制谐波和补偿无功，可以有效地改善电网质量。
Abstract: : Harmonic is caused power loss increase, important factors in the decline in the quality of power supply.
摘罍要：谐波是导致电力损耗增加，供电质量下降的重要因素。
In electric railway traction substation, power capacitors and harmonic filters are the important devices for improving both the power factor and the power quality.
在电气化铁道牵引变电站中，装设无功补偿电容器和谐波滤波器是提高功率因数、改善电能质量的重要手段。
Objective: To evaluate the effect of the tissue harmonic imaging (THI) on image quality and construction measurement.
目的：探讨组织谐波成像技术(THI)对图像质量及结构测量值的影响。
Harmonic is one of the most important indexes of electricity's quality and electrical equipment's specialty.
谐波是衡量电力质量、设备电气特性的重要指标之一。
This control principle can improve the control of power quality and effectively compensate the harmonic currents at load side, reactive power and negative sequence current.
该控制方法能改善系统电能质量的调节，有效地补偿负荷侧谐波电流、无功功率和负序电流。
At present, our country power quality national standard was chiefly stipulated five quotas: frequency, harmonic and voltage deviation, three-phase unbalance and the voltage fluctuation and flicker.
目前我国电能质量国家标准主要规定了五个指标：频率、谐波、电压偏差、三相不平衡及电压波动与闪变。
The concept of power quality includes the quality of the supplying voltage with respect to, for instance, voltage sag, imbalance, harmonic distortion, voltage fluctuation and flicker, etc.
质量包括电源电压的质量的能力的概念与有关，例如，电压下跌，不平衡，谐波失真，电压波动并且摇曳，等等。
Active power Filter (APF) technology is one of the important ways to realize harmonic wave compensation of electrical network and improve the quality of power supply.
有源电力滤波器(简称APF)技术是一种实现电网谐波补偿、改善供电质量的重要方法。
Based on the demand of the power quality 's harmonic monitor and the specialty of large scale programmable logic device, this paper advances a frame of a 24-bit float point FFT module in FPGA.
论文根据电能质量谐波监测要求和大规模可编程逻辑器件的特点，设计了一个基于可编程逻辑器件的24位浮点FFT处理模块。
The study of harmonics is a very important topic for electric power quality. Research topics include harmonic source analysis and efforts, measurement technology and elimination strategy.
谐波的研究是电能质量领域的一个重要课题，研究领域包括谐波源分析、检测技术以及消除策略。
Additionally, the paper investigates the statistical characteristics of objective functions of harmonic state estimation problem and thus presents practical algorithm evaluating quality of estimation.
另外，文章调查了谐波状态估计问题的统计特性，并在此基础上提出了评价估计质量的具体算法。
Conclusions the tissue harmonic imaging evidently improves the contrast and imaging quality, so that the positive rate and diagnostic accuracy of calculus would be upgraded.
结论组织谐波显像能明显提高图象的反差及对比度，改善图象质量，使泌尿系结石的阳性显示率和诊断准确性明显提高。
The unified power quality conditioner (UPQC) is a kind of novel harmonic and reactive compensation equipment by combining the series active filter and shunt active filter.
统一电能质量调节器(UPQC)是结合串联有源滤波器和并联有源滤波器的一种新型谐波和无功补偿装置。
Harmonic pollution in ship electronic power system is becoming more and more serious, power quality comes down and different kinds of fault and accident happen continually.
船舶电力系统的电网谐波污染日益严重，电能质量下降，由谐波引起的各种故障和事故不断发生。
Reactive power and harmonic can decrease power network quality and traditional compensators with contactor switch have some drawbacks.
由于存在无功功率和谐波，从而引起电网质量下降，传统的接触器投切补偿电容器存在诸多不足之处。
Objective To study the method of how to improve the quality of sonograms and increase sonograms reveal rate by comparative observation between tissue harmonic imaging(THI)and fundamental imaging (FI).
目的探讨组织谐频成像（THI）与常规基频成像（FI）的对比观察，研究THI改善声像图质量，增强图像的显现力。
It produces serial power quality problems such as reactive power excessive, negative exceeding, containing high harmonic.
由此产生诸如无功成分多、负序突出、谐波含量高等一系列电能质量问题。
In order to restrain harmonic pollution and improve power system quality, power factor correction (PFC) circuit is applied in pre-stage of power supply.
为了抑制谐波污染，改善电网品质，目前多在电源前级加入功率因数校正环节。
In layman terms, harmonic distortion adds a slightly thick or buzzy quality to music.
在外行看来，谐波失真添加了一点浊音或鸣音音效。
The harmfulness of harmonic caused the people's attention. They have been resulting in deterioration of power quality.
谐波的危害性引起了人们的注意，它们在电力系统中导致了严重的电能质量恶化。
The experimental results of proposed power quality control system in restraining harmonic voltage and of its synchronous operation with a power system are presented.
通过电能质量控制系统与电网间同步运行试验和谐波电压抑制试验，实现了逆变器与电网的同步运行控制以及负载谐波抑制控制。
In order to improve the power quality, Active power filter is used to compensate harmonic current of nonlinear load to decrease harmonic pollution of the grid.
为了提高电能质量，通常采用有源电力滤波器来补偿非线性负载的谐波电流，以减小谐波对电网的污染。
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。
Consequently, the additional harmonic loss of rectifier transformer is reduced, the power factor is enhanced and the power quality is improved.
同时整流变压器的附加谐波损耗得到了有效降低，功率因数得到提高，改善了系统的电能质量。
Holbesun Electric gathered leading products, systems and solutions, is harmonic management, reactive compensation and power quality optimization area is the industry leader in professional supplier.
赫伯孙公司汇集了领先的产品、系统和解决方案，是谐波治理、无功补偿和电能质量优化领域具有行业领先地位的专业供应商。
Holbesun Electric gathered leading products, systems and solutions, is harmonic management, reactive compensation and power quality optimization area is the industry leader in professional supplier.
赫伯孙公司汇集了领先的产品、系统和解决方案，是谐波治理、无功补偿和电能质量优化领域具有行业领先地位的专业供应商。
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