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。
A higher harmonic wave filter was designed.
设计了高次谐波滤波器。
Based on this, the methods for compensating the harmonic wave are discussed.
在此基础上，对该类系统的谐波补偿方法进行了探讨。
These methods are valid to restrain the harmonic wave in arc welding inverter.
这些方法对于抑制弧焊逆变电源的谐波是行之有效的。
Output current is sine wave and does not include unnecessary high harmonic wave.
输出电流为正弦波，不包括多余的高次谐波。
At the same time, the characteristic of probability of harmonic wave current can be obtained.
同时得到了该次谐波电流的概率统计特性。
The source of the harmonic wave in the power system mainly comes from all kinds of nonlinear devices.
电力系统中产生的谐波主要来自各种非线性用电设备。
The harm and type of harmonic wave were introduced, and the principle of active filter was analyzed as well.
介绍谐波的危害，产生谐波的类型，有源滤波的原理。
The signal has the advantages of small harmonic wave amount, good sine property and small subdivision error.
由于电子细分技术是基于理想的正弦信号，正弦性差将带来很大的细分误差。
It is concluded that it is better to use harmonic wave as exciting wave than to employ symmetrical trigonometric wave.
最后得出谐波激励比对称三角波激励效果好的结论。
The vibratory treatment is done at each harmonic wave until the resonance frequency is stable and then turned to the next.
在每一个谐波进行振动处理直至谐振频率稳定并转入另一个谐波进行振动处理。
The paper introduces the causes of harmonic wave and its impact on transmission lines and electric equipments in Wuxi grid.
介绍了江苏无锡地区电网谐波的产生，分析了电力谐波产生的原因以及对输电线路、电器设备等的影响。
The fluctuation circle of aquatic products price between 1978 and 2000 via ratio of variation and harmonic wave was researched.
采用变异率指标与谐波分析法研究了1978-2000年水产品年度收购价格波动的周期性。
The current or voltage harmonic wave in power lines may cause abnormalities in self synchronization drive, computer, telephone, etc.
电力线路的电流、电压谐波效应可以引起自同步拖动、计算机、电话等异常运行。
Even if it worked with three-phase sine, three-phase line current would have non-sine aberrance and produce harmonic wave-electricity.
即使在三相正弦激励的作用下，三相线电流也将发生非正弦畸变，产生谐波电流。
The errors of harmonic wave analysis and direct sampling in electric parameters measurement are analyzed. The method to minimize errors is presented.
分析了电力参数微机监测中的直接采样计算法与谐波分析法的误差，并提出了减小误差的方法。
The wave pressures are computed numerically and the computed first-order and second-order harmonic wave pressures are compared with the measured data.
利用数值方法对波浪压力进行了计算，并将一阶和二阶波压力的数值结果与实测值进行了比较。
The reasons for the generation of harmonic wave in electric network during the running of large scale electrochemical rectification devices are analyzed.
分析大工业电化学整流装置运行过程中产生电网谐波的原因，认为要保证电网的安全运行就要抑制用电设备产生谐波。
On the basis of analysis of operation performance of AC motor, the harm of harmonic wave of electric net work to electric motor is summarized in the paper.
在分析交流电机工作特性的基础上，阐述了电网谐波对电机的危害。
In this paper, firstly the mathematic model for variable frequency motor is developed, and harmonic wave is analyzed when variable frequency motor is fed by inversion.
本文首先建立变频电动机的数学模型，对逆变器供电时的谐波进行了分析。
The wave equation having general forms of planar simple harmonic wave is deduced in this article. It is simple and accurate to solve wave equation by using this formula.
推导出了具有一般形式的平面简谐波的波动方程，利用此公式求解波动方程简单而且准确。
The harmonic wave has great harm, and harmonic sources are widely distributed, so the harmonic current caused by different harmonic sources should be analyzed one by one.
由于谐波危害很大，而且谐波源分布广泛，因此对不同谐波源产生的谐波电流应逐个分析。
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。
At the same time the paper analyses the frequency spectrum of the wave from, and indicates the influence of voltage harmonic wave component on the steady state performance.
同时对波形进行了频谱分析，指出了电压谐波成分对双馈电机稳态性能的影响情况。
To avoid device damage caused by harmonic wave, a VQC device integrating harmonic suppression function is presented in terms of the filter capability of capacitor and reactor.
为避免谐波问题造成的电容器等设备损坏，提出了根据电容器和电抗器的滤波能力，把谐波抑制功能加入电压无功控制（VQC）装置。
Compared with other methods by experiment, we think the compensation method using micro-computer to auto control harmonic wave filter compensation is simpler and more practical.
实验表明，利用微机自动控制的谐波滤波补偿法较为简单实用。
Introducing the complex viscoelastic modulus, visco-elastic wave equation has the similar form with elastic wave equation for harmonic wave motion, in case of linear viscoelastic.
在线性粘弹性假设条件下，通过引入复弹性模量，使粘弹性波动方程具有和弹性波动方程类似的形式。
Proceeding from the effect of harmonic wave on the heating of electric motors , the author analyses the corresponding microcomputer protection algorithm and some relevant questions.
从介绍谐波对电动机发热的影响出发，分析了相应的微机保护算法及有关问题。
Transient and surge are the instant aberrance of the voltage and electric current on the simple alternating current wave circuit. surge and harmonic wave are the main manifestation.
瞬变和浪涌是正弦交流波电路上电压与电流的一种瞬时态的畸变。浪涌、谐波为主要的表现形式。
If the stator inside winding is out of order, we must consider the influence of the harmonic wave with low orders or fraction orders when calculating the air space inductance values.
如在定子绕组内部故障情况下，气隙电感量的计算必须考虑低次和分数次谐波的影响。
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