3) harmonic characteristics
谐波特性
1.
The relationship between currents of Filter Commutated Converter and the harmonic characteristics of multifrequency AC/DC interconnected systems based on New-Type converter transformer have been studied with ideal models by means of theoretical analysis and matlab simulation.
采用理想化的研究方法,通过理论分析和MATLAB仿真对滤波换相换流器的电流变换关系以及基于新型换流变压器的多基频交直流互联系统的谐波特性进行了系统的研究。
2.
To give Pspice simulation and experiment results, this paper analyses the harmonic characteristics of three-level inverters using double-Fourier series, and compares it with that of two-level ones, based on the principal circuit topology and its operating principles of three-phase SHPWM three-level inverter with clamp diodes, which shows many merits of the three-level one.
基于二极管箝位型三相SHPWM三电平逆变器的主电路拓扑和工作原理,分析了采用双重傅立叶级数方法的三电平逆变器的谐波特性,并与两电平逆变器的谐波特性进行了比较,给出了Pspice仿真和实验结果。
3.
Further more the switching loss and harmonic characteristics of these SVPWM strategies are compared,the optimal SVPWM of the noneswitching areas of phase voltage lagging behind sinusoid voltage peaks 30° is selected according to the load characteristic.
根据零矢量的不同分配方式,给出了几种典型的SVPWM实现方法,并从开关损耗和谐波特性两个方面做了对比分析。
4) harmonic characteristic
谐波特性
1.
Tish Paper studies a few method of generating PWM pulse,Also analyse and discuss the harmonic characteristic of these modulation techniques,and provide a prof to select these method.
对产生 PWM波的几种方式的谐波特性做了比较和探讨 ,为合理地选取控制方式提供了依据。
2.
The application of PSCAD / EMTDC and Matlab simulation software is used to simulate each case,it also gives an analysis to the difference of harmonic characteristics between single and multi-DFWG setting into the state grid.
本文在分析双馈风力发电机的发电原理基础上,通过对双馈发电机数学模型的分析,在Matlab软件环境下建立了双馈发电机的单机模型,并仿真了双馈发电机的运行特性;并分析了考虑谐波环境下,双馈发电机的谐波电路原理和功率特性;最后分别分析了单台双馈发电机组并入电网后在不同运行状态下产生谐波的特性,应用PSCAD/EMTDC以及Matlab仿真软件对两种情况进行了仿真,并同时对单机并网和多机并网情况下的系统并网点谐波进行了仿真分析,分析表明含双馈机的风电场在不同机组数目并网后不同运行状态下的谐波特性也有所不同。
5) transmission characteristics
传输特性
1.
Study of kinetics and transmission characteristics of double-cosine vibration co nveyor;
双简谐式振动输送机动力学与传输特性研究
2.
Research on transmission characteristics of a novel single-ridge rectangular waveguide;
新型单脊矩形波导传输特性研究
3.
Transmission characteristics of far-infrared frequency selective surface;
远红外频率选择表面的传输特性分析
6) transmission properties
传输特性
1.
Effect of temperature shock on transmission properties of frequency selective surfaces;
频率选择表面传输特性的温度循环效应
2.
Experiment on influence of machining on transmission properties of frequency selective surfaces;
工艺参数对频率选择表面传输特性试验研究
3.
Study on the Transmission Properties and Structure Design of Bragg Fiber;
Bragg光纤的传输特性研究及其结构设计
补充资料：谐波
谐波
harmonics
(harmonies)频率为基波频率整数倍的正弦波分量，又称高次谐波。在交流电路中.具有非线性阻抗特性的电气设备(见非线性负荷)向电源反馈高次谐波，导致电力系统电压、电流波形崎变，使电能质盘变坏。近年来，由于电力电子技术的发展，大量换流设备、电子设备等具有非线性阻抗特性的电气设备接人电力系统，造成谐波污染。这些电气设备称之为谐波源，主要有电力机车、电弧炉、整流器、变频器、逆变器、相控调速和调压装置、电焊机、感应加热设备、气体放电灯以及有磁饱和现象的机电设备。 谐波的危害性表现在干扰通信线路，使同步发电机额定输出功率降低，感应电动机功率因数下降、转矩降低、损耗增加，变压器温度升高、效率降低，加速电气设备绝缘介质老化，使用寿命缩短，甚至损坏，控制保护及枪侧装t工作精度、可靠性降低等。 谐波限制标准见供电质童。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条