1) harmonic direction
谐波流向
2) current harmonic
电流谐波
1.
Suppression technology of input current harmonic and conducted electro-magnetic emission for arc welding equipment
弧焊设备网侧电流谐波和传导发射的抑制技术
2.
These current harmonics exists in any nonzero speed and are independent of time-varying parameters,such as stator winding resistance.
基于电流谐波频谱分析的无速度传感器速度辨识方法提高了速度辨识性能,尤其是在低频情况下,这种速度辨识方法优点更为突出。
3.
This paper presents the current harmonic analysis of a high frequency model of AC/DC voltage source converter using PWM with phase and amplitude control.
从幅相控制的观点出发 ,用Fourier级数分析方法对变流器的高频模型进行了电流谐波分析。
3) harmonic current
谐波电流
1.
PS-3000 harmonic current test system based on BP algorithm;
基于神经网络BP算法的PS-3000谐波电流检测系统
2.
Shunt active filter based on harmonic current quick measuring method;
基于谐波电流快速检测方法的并联型有源滤波器
3.
Assess harmonic currents of electric locomotive with Laguerre polynomials;
基于Laguerre多项式的电力机车谐波电流估计
4) harmonic currents
谐波电流
1.
A filter for reducing harmonic currents in stator windings of 6-phase induction motor;
六相异步电机定子谐波电流抑制的滤波器研究
2.
Based on the instantaneous reactive power theory, two groups of three-phase unit symmetrical rotating reference phasors with same frequency as that of power grid voltage is built and a novel approach to accurately detect harmonic currents by use of active power filter (APF) is proposed.
基于瞬时无功功率理论,建立了一个与电网电压同频率的单位对称基准旋转相量,提出了一种运用APF精确检测谐波电流的方法。
3.
To eliminate the influence of AC side harmonic currents, a certain capacity of AC filters is installed correspondently, and the cost of them amount to 10% percent of a HVDC project cost, which is very important to the performance and cost of HVDC project.
为给直流输电工程中交流滤波器设计提供谐波电流源,提出了交流侧特征谐波电流时域分段算法。
5) harmonic power flow
谐波潮流
1.
Partly decoupled harmonic power flow in symmetrical component coordinate system;
采用对称分量坐标的谐波潮流部分解耦算法
2.
A novel harmonic power flow algorithm was presented.
基于非线性元件的线性耦合导纳矩阵模型提出一种谐波潮流的新算法,并以晶闸管控制电抗器(thyristor controlled reactor,TCR)为例来阐述潮流算法的思路。
3.
Introduced application of object oriented technology in power system,developing harmonic power flow program with object oriented technology.
介绍了面向对象技术在电力系统中的应用;针对目前对谐波源的建模都比较简单,缺乏详细的谐波源模型,采用面向对象技术开发了电力系统谐波潮流程序,在给定谐波量的前提下分析了谐波在电网中的分布情况。
6) current harmonics
电流谐波
1.
Analysis of input current harmonics of welding inverter and its solving method
逆变焊接电源输入电流谐波分析及其解决措施
2.
It presents the method of adopting shunt passive filters to solve current harmonics,and measures of modifying power supply modes and limiting voltage flickers.
根据江苏宿迁开发区变电所35kV系统谐波源用户的具体情况,以实测数据为依据,在分析计算的基础上查找出谐波超标原因,提出了采用并联无源滤波器的方式解决电流谐波问题,采取改造供电方式和隔离措施限制电压闪变问题的方案,取得了良好的实效。
3.
The basic conception and the relationship of power factor, current harmonics and EMI for SCR(Silicon Controlled Rectifier) and SMR(Switch Mode Rectifier) at different stage are described.
本文对不同应用阶段的可控硅相控整流器,高频开关型整流器中功率因数、电流谐波、电磁兼容性等指标的基本概念及其相关性做了阐述。
补充资料：旅游者流向与流量
旅游者流向与流量
旅游者流向与流里在一定时期内多数旅游者旅行的地域趋向。在洲际旅游中，旅游者一般集中于欧洲、北美、东亚和太平洋地区;在洲内旅游中，旅游者一般流向邻近国家和地区;在国内旅游中，旅游一般由城市流向乡村。与旅游者流向密切相关的因素，有旅游者收入水平，旅游设施与服务质量，旅游者的兴趣爱好，旅行安全与旅游地自然、地理、历史特征等。旅游者流向的趋势常常由于政治、战争、恐怖活动等而受到影响。一定时期内流向某地域的旅游者数量称为旅游者流量。旅游者流向与流量的多少，对于旅游接待国或地区的旅游业发展有重要意义。它是旅游市场上各旅游接待国或地区之间竞争的主要目标。
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