1)harmonic source谐波源
1.Control of harmonic source from local power network of Qilu Petroleum and Chemistry Engineering Corporation Ltd;齐鲁石化公司局域电网谐波源的治理
2.Development of real-time harmonic source detector based on ARM and DSP;基于ARM和DSP的实时谐波源定位仪的研制
3.Simulation analysis of nonlinear load harmonic source in power system;电力系统非线性负荷谐波源的仿真分析
英文短句/例句
1.Some of the more common sources of these harmonics are:较普遍的谐波源有:
2.The Research of Summation of Random Harmonic Current of Multi-Harmonics Sources;多谐波源随机谐波电流叠加问题的研究
3.Research on Localization and Detection Methods of Harmonic Source in Power Distribution Network;配电网中谐波源定位与检测方法研究
4.Research on Multi-harmonic Source Summation Method Based on Maximum Entropy基于最大熵的多谐波源求和方法研究
5.harmonic content of an a.c.power supply交流电源的谐波含量
6.The Research on Harmonics Detection Method of Active Power Filter;有源电力滤波器谐波检测方法的研究
7.Application of Active Power Filter to Compensate Harmonics;有源电力滤波器在谐波治理中的应用
8.Application of wavelet transform in active power filter harmonic analysis小波变换在有源电力滤波器谐波分析中的应用
9.Active filter filters 50 th and above harmonics to reduce their influences;有源滤波模块滤除50次以上的高次谐波,减少了高次谐波的影响;
10.Research on the HNR Separation of Voice Source with Harmonic Noise嗓音源谐波噪声HNR分离方法研究
11.Development and application of harmonic detection system of the arc welding power source弧焊电源谐波检测系统的研制及应用
12.Calculation of Three-pulse Harmonic Voltage Source for HVDC Transmission高压直流输电3脉动谐波电压源计算
13.Detecting Method for Harmonics and Reactive Currents in Active Power Filter有源电力滤波器谐波及无功电流的检测
14.Study on Harmonic Current Detecting and Controlling of Three- Phase Shunt APF并联型三相有源滤波器谐波电流检测控制研究
15.A Study on Intelligent Detection and Control Approaches of Distortion Currents for Active Power Filters;有源电力滤波器谐波电流智能测控方法研究
16.Study on Algorithm of Detecting Harmonics and Emulation on Shunt Active Power Filter;并联有源滤波器谐波检测算法研究及仿真分析
17.The Design of Active Power Filter Based on the Algorithm of LCC Harmonic Detection;基于LCC谐波检测算法的有源电力滤波器设计
18.Study on the Detection Approaches of Harmonic Currents and Simulation for the Active Power Filters;有源电力滤波器谐波电流检测方法与仿真研究
相关短句/例句
harmonic sources谐波源
1.Analysis of electric metering of harmonic sources in Hunan province and its countermeasure;湖南省谐波源负荷电能计量方式分析与对策
2.By analyzing the characteristics of the several common load harmonic sources, this paper inducted the resistance formulas, sequence resistance and sequence impedance matrixes of tri-phase universe loads, star and triangle connection loads under harmonics condition.在分析几种常用负载谐波源特性的基础上,推导出了在谐波环境下三相通用负载、星形和三角形联结负载谐波源的阻抗计算公式、序阻抗和序导纳矩阵。
3.The mechanism of fraction-harmonics appearance is analyzed through the example of inverter speed equipment and fluctuation load of two typical fraction-harmonic sources,and the harm of fraction-harmonics is analyzed in detail through some typical examples.为了了解、研究分数次谐波对电力系统安全稳定运行产生的危害及其机理,以变频调速装置和快速变化的波动负荷2种典型的非线性负荷分数次谐波源为例,分析了分数次谐波的产生机理及分数次谐波的危害。
3)multi-harmonic sources多谐波源
1.Algorithm for calculating harmonics superposition of multi-harmonic sources in rural power grid;农村配电网中多谐波源谐波叠加算法的研究
2.Studies on analysis methods of multi-harmonic sources in AC/DC hybrid transmission system;交直流混联输电系统多谐波源的分析方法研究
3.Harmonic sources modeling and harmonic superposition simulation of power system with multi-harmonic sources;多谐波源网络谐波源建模与谐波叠加仿真
4)main harmonic source主谐波源
1.The detection of main harmonic sources is one of the important branches of harmonic analysis.分析了两端源网络谐波阻抗的极性和取值范围与主谐波源的关系。
5)Multi-harmonic source多谐波源
1.This paper Summed up the advantages and disadvantages of the existing method of multi-harmonic source summation, then presents a new method to obtain the sum of random harmonic vectors that have different phase angle probability distribution functions in a power system.本文对现有多谐波源叠加的方法进行分析,总结了各类方法的优点与不足,在此基础上提出了一种处理电力系统中具有不同相角分布特点的随机谐波矢量叠加问题的新方法。
6)supply harmonic电源谐波
1.Research on supply harmonic of high power density induction motor equipped with VVVF converter;VVVF变频器驱动高功率密度异步电机的电源谐波研究
延伸阅读
河外射电双源和多重源 河外射电展源中最典型的也是数量最多的(占40%)一种是双源。双源的最普遍的特征是,在相隔几万至两百万光年的距离上形成两块射电瓣(又称为子源)。证认出的光学对应体(星系或类星体)往往位于此两子源连线的中心。子源的远离光学母体的外边缘处射电亮度变化很陡,而且更接近最大值(此区域常是1″量级大小的致密成分),而向光学母体方向的则是亮度逐渐减弱的辐射延伸部分。最典型的代表是天鹅座A(见射电星系)。有时,光学母体两边是以两个强的外子源为主体的多个子源的组合结构,但仍然成为近似对称分布的所谓多重源。这种直线和对称排列的双源特征,在其所属的光学母体的致密射电区内有时能重现,就是说在不到双源的10-4~10-5的范围内,即在光学体小于0奬01(或几十光年)的区域内,仍然有成双的小致密源出现,而且里、外双源的连线基本上是一致的,例如,3C326、33C111、3C390.3、3C405等射电源。 双源的普遍特性,如流量不变化,具有幂律谱 (Sv∝v-α,平均频谱指数α 约为0.75), 有百分之几的线偏振而没有圆偏振,磁场为10-4~10-5高斯,射电光度强(1040~1045尔格/秒), 能量高(1058~1081尔格)等等都与一般展源相同。对双源已进行了大量的观测统计,得出的结果是两个子源的流量密度相差不大,平均只差40%。两个子源与光学母体的距离也相差不大,双源中较亮的子源更靠近光学母体,直径较小,频谱较平。两个子源之间的距离约为子源直径的 2~4倍。在双源间距为 6~100万光年的范围内,不同射电源的子源大致以同样方式膨胀和相互分离, 形成了从中心向外抛射的圆锥体(圆锥角约20°~50°)。源的光度越大,双源之间的距离越大,抛射圆锥也就越窄。射电源主轴方向(两个子源的连线方向)与光学星系主轴方向成各种交角,表明二者没有相关性。同样,射电源主轴与偏振方位角之间也没有明显的相关性。以全部双源为例进行统计,没有发现射电光度与频谱指数或展源直径或光学亮度之间有什么关系。子源明亮头部的线偏振只有百分之几,而在延伸向光学母体的局部地区的线偏振则达到百分之几十,甚至高达百分之七十。 双源和多重源的这些特性提出了三个必须解决的问题:①成双的对称性和一线排列问题;②在极其稀薄的介质中,子源抛射膨胀成形而不瓦解的约束机制问题;③巨额能量的来源和转换方式以及如何向子源进行输运的问题。目前流行的模型基本上有三种:等离子体团抛射及膨胀,大质量物体的一次抛射,连续喷射束。 参考书目 A.G.Pacholczyk,Radio Galaxies,Pargamon Press, Oxford, 1977.