查询词典 harmonic

Compared with the traditional shunt APFs, there is no need to sense load current, noneed to calculate the harmonic and reactive component of the load current, and noneed for multiplier.

与传统APF相比，采用单周控制方法的APF的突出优点是：不需要检测负载电流，不需分离出负载电流中的谐波和无功分量，因此省略了高精度乘法器，控制电路简单。

In contrast to the traditional APF,there is no need to sense the load current,no need to calculate the harmonic and reactive component of the l...

具有主电路结构新颖、控制电路简单，补偿效果好等优点。实验结果验证了文中所提出理论的正确性

The improved algorithm supplied the exact reference phase for current d-q transformation,then detection accuracy of the algorithm wasn t influenced by voltage distortion,so it can detect the harmonic and reactive component of load current effectively.

该改进算法为电流的d-q变换提供精确的参考相位。采用改进的检测算法，电压畸变不会影响该算法检测的精确度，并能有效地检测负载电流的谐波与无功分量。

Currently, there are various projects for comprehensive compensation of reactive power, harmonic component and negative sequence in the traction substation of electrified railway.

目前，我国牵引变电所无功功率、谐波和负序的综合治理已有多种方案，本文结合国内重载电气化铁道朔黄线的负荷情况，通过分析多种综合补偿方案，并加以比选，得出适合朔黄线的牵引供电综合补偿方案。

Converting the three-phase current coordinate by d-q transformation,picking out the fundamental active component,then the harmonic and reactive component was detected.

通过d-q变换对三相电流进行坐标变换，提取其基波有功分量，从而检测出其谐波与无功分量。

The technique made full use of the characteristic of PR controller which can realize zero steady-state error in AC input signal in stationary frame. In the method, the active and reactive current component in the vector control strategy were transformed in the stationary frame to achieve the objective of keeping the DC-link voltage constant, adjusting the power factor and decoupling the active and reactive power. Compared with conventional double close-loop proportional integral controller, the PR technique is better in harmonic compensation without the complex rotating frame transformation and the couple or feedback voltage which is easily influenced by temperature and circuit parameters. The control algorithm is easy to be realized while the robustness and power quality is improved.

该方法充分利用了PR控制器能够在静止坐标系下对交流输入信号无静差控制的优势，将矢量控制策略下的有功电流和无功电流分量转换到静止坐标系下进行调节，实现网侧变换器维持直流电压稳定和调节功率因数的控制任务和双馈电机有功、无功功率的解耦控制，与传统的双闭环PI控制相比，该策略无需繁琐的坐标旋转变换，不存在受温度及电路参数影响的耦合项和前馈补偿项，且易于实现对系统低次谐波电流的补偿，减小了控制算法实现难度，提高了控制系统的鲁棒性和电网电能质量。

In chapter 5 the harmonic retrieval problem in colored non-Gaussian noise is addressed in real domain.

第五章在实数域研究非高斯有色噪声中的谐波恢复问题。

The real variable theory of the Hp space is one of the most wealthiest fields of harmonic analysis from 1970s.

H~p空间的实变理论是上世纪70年代以来调和分析中最富有成果的领域之一。

A response reanalysis approach of structure under harmonic or periodic excitation has been studied with original vibrating response.

再分析方法已应用到诸多领域，如结构静响应的再分析，结构振动模态的再分析，这些方面的研究已取得很大进展。

My basic conclusion: to protect and reanalyze traditional culture and to refine Meme, we should make great efforts to construct the harmonic culture of socialism with Chinese characteristics.

我的基本结论就是：全盘保存传统文化，重新解读文化传统，精心筛选文化基因，努力建设中国特色社会主义和谐文化。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失