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Probe into Grid Harmonic Wave Pollution 关于电网谐波污染的探讨
harmonic wave pollution 谐波污染
Examples about Prevention and Cure of the Harmonic Wave Disturb from the Transducer. 变频器谐波干扰防治实例。
Application of step dynamic compensation and harmonic wave filtering system in Beiman Special Steel Co. 有级动态补偿及谐波滤波系统在北钢的应用。
The prediction model of harmonic wave analysis includes inclinational item, periodical item and random item. 谐波分析法的预测模型包括趋势项、周期项和随机项；
Supposition of two vibrations with same frequency and direction, condition generated mechanical wave, dynamic equation of plane harmonic wave. 同方相同频率的两个简谐振动的合成;机械波产生的条件;平面简谐行波的运动学方程。
The three harmonic wave(355nm) of a Q-switch yttrium-aluminium garner laser is directed into the microscope and focused by the objective. 工作波长355nm是由电子调Q Nd:YAG激光经KDP倍频和混频后得到的.
In accordance with the familiar configuration for present lighting system,the common harm of harmonic wave and numerical values were showed here. 针对目前灯光系统设计中常见的配置情况,指出常见的谐波危害及相关数值的计算。
It is verified the time harmonic wave propagation consists of a incident wave and a reflected wave( even if by circuit theory of ABCD matrix of R, L, C). 验证传输线上各频率成份弦波电压及电流之沿线分布(路矩阵模式解)入射波与反射波所合成。
Abstract: This paper analyzed the problem of harmonic wave, matching of load and calorification for inverters in running, and made the relatively the measure. 摘要:本文针对变频器运行过程中存在的谐波问题、负载匹配问题和发热问题，逐一进行了分析，并提出了相对应的解决方案。关键词:变频器谐波负载发热
The principium of rate differential and second harmonic wave breaking are told emphasis.Some improving suggestions on this system are propounded according to some real problem. 重点介绍了比率差动及二次谐波制动的原理，并结合现场中遇到的一些问题提出了今后木系统装置需改进的一些意见。
Then the feature and restraint of the harmonic waves of HVDC is also studied. 同时也对HVDC系统交直流侧谐波特征及抑制问题进行了研究。
The isolation structure that is acter on by harmonic wave and earthquake is simulated and analyzed in order to investigate the feasibility of the system. 对此隔震结构在简谐波和地震波作用下进行仿真、分析从而证明这个系统的可行性。
The harmonic wave of current, when single phase grounded fault happened, can’t be eliminated by mounting Petersen-coil.The damage of arc-grounding overvoltage appeared. 而在单相接地的残余电流中含有较大的高次谐波，是加装消弧线圈也无法消除的，这使得弧光接地过电压的危害凸显出来。
The fundamental harmonic wave of resistive component is acquired and the errors caused by unsynchronized sampling and interference in the field are eliminated effectively. 该算法有效地消除了由于信号频率抖动造成的非整周期采样以及测试现场高频干扰在测量过程中造成的误差。
After analysis and determination on harmonic wave from rectification units operation, and understood hazardness of harmonic wave, the design project of harness was put forward. 介绍了电化学工业整流装置产生谐波的种类,谐波的治理方法,滤波器的种类及其特点,滤波器方案的选择。
Energy of simple vibration, supposition of two vibrations with same direction and frequency, generation and propagation of mechanical wave, physical quantities described mechanical wave, plane harmonic wave. 简谐振动的能量;同方向同频率两谐振动的合成;机械波的的产生与传播;描述机械波的物理量;平面简谐波。
The paper introduces the output harmonic wave data look-up table method counting module based on system hardware platform in details and makes the simulation under the Code Composer Studio2(CCS)software development environment. 其中,详细介绍了基于本系统硬件平台的输出谐波波形数据的查表法计算模块,并且在Code Composer Studio2(CCS)软件的开发环境下进行了软件仿真。
It also gives a method to calculate active power and reactive power with harmonic waves, and the 2k byte software block. 给出了含有谐波情况下的有功、无功功率的计算方法和2K字节的软件框图。
The performance of the electric vehicle is improved greatly in which the harmonic wave of output voltage, power loss and torque pulsation of the system are decreased by controlling the switch angles. 它运用规则采样法产生正弦脉宽调制波，通过开关角的控制抑制逆变器输出电压中的谐波分量，降低了电动机的损耗和转矩脉动，使电动车的运行性能得到了较大改善。