第一部分讨论各种谐波问题，如使供电电压畸变，降低功率因数，增加能量损耗，干扰通讯系统等。
The harmonic problems, such as distorting supply voltage, decreasing power factor, increasing energy loss, interfering with communication systems etc. are discussed in the part one.
本文介绍了CS5460 A芯片的特点、工作原理及其在高精度工频电压、电流、功率、功率因数、频率表中的应用。
The paper introduces the technique feature and the operation principle of chip CS5460A, and its application in high-accuracy power frequency voltage, current, power, power factor, frequency meter.
并联电容器组的基本目的是要提高当地线路的电压，或提高引线路所带负荷的功率因数。
The basic purpose of a shunt capacitor bank is to increase the local circuit voltage and or reprove the load power factor carried by the circuit.
根据企业的电网电压标准和对功率因数的要求，确定电动机的电压等级和类型。
Grid voltage in accordance with corporate standards and requirements for power factor to determine the motor's voltage rating and type.
由于补偿后的电流与电压在相位上接近，即补偿后的功率因数接近1，所以达到了动态无功功率补偿的目的。
The electric current and voltage are close to the phase after compensating, namely the power factor is close to 1, so the purpose of dynamic var compensation is achieved.
采用双环结构，用三个非线性PI环节实现了对整流器直流电压与功率因数的高性能控制。
The DC bus voltage and the power factor of the PWM rectifier are regulated by three nonlinear PI controllers with high performance.
这两种电路都具有功率因数高、输出电压较低等特点。
Two circuits, characterized by high Power Factor and low output voltage, are proposed.
本文研究了有源功率因数校正技术中的临界导通模式的基本原理，并对其中的电压基准源和模拟乘法器做了详细的分析和设计。
In this paper, we studied on critical current mode active Power Factor Correction technology, and did a detailed analysis and design on voltage reference circuit and analog multiplier circuit.
用于测量光源的电性能参数，测量电压、电流、功率、功率因数。
For measuring the electric performance parameters of light sources, measuring the voltage, current, power and power factor.
为了满足实时检测要求，研究了计算电压、电流有效值和功率因数的快速演算法。
In order to satisfy the real - time measurement, we studied the fast arithmetic of virtual value of voltage and current, power factor.
电力系统中常需测量电压、电流、功率因数、有功功率、无功功率和视在功率等参数。
In an electric power system, the following parameters often need measuring: voltage, current, power factor, power, reactive power and apparent power.
通过对高功率因数变流器网侧指令和实际电流的预测，提出了一种采用变流器电压矢量优化控制策略的电流跟踪新方案。
This paper discusses a new control tactics of the converter which adopt voltage vector optimum control tactics by predicting the current of high power factor converter.
静止无功发生器可提高交流输电系统和配电系统的电压调节能力、系统稳定性和功率因数。
Static var generators are used to improve voltage regulation, stability, and power factor in ac transmission and distribution systems.
有源功率因数校正满足EMC的谐波电流的排放限制，以及满足电压波动和闪变的限制。
Active Power Factor Correction to meet EMC limits for harmonic current emissions, and limitations of voltage fluctuations and flicker.
本文研制了一套在调频串联谐振电压下进行介质损耗因数测量的系统。
The author has developed a dissipation factor measuring system using the variable frequency series resonant voltage.
但如果设计反激有源箝位电路工作在电流连续模式，控制占空比，使输入电流跟随输入电压，可以提高输入功率因数。
However if the active clamp flyback converter is designed to operate in CCM, and the duty cycle is controlled to make the input current track input voltage, the input power factor can be improved.
实验结果表明，应用该电路拓扑的实验装置，其功率因数较高，输入电流的总谐波畸变较低，输出电压纹波小，而且整个装置的效率也比较高。
Experiment result showed, the topology can make the device get to high Power Factor (PF), low Total Harmonic Distortion (THD) of input current, low ripple of output voltage, and high efficiency.
提高牵引变电所(简称牵引变)功率因数以改善系统电压质量、减少系统损耗是改善电气化铁路电能质量的有效措施。
Increasing power factor of traction substation is the effective measure to improve power quality of electrified railway for better voltage quality and less loss.
建立了对基于电压空间矢量pwm的三相高功率因数整流器实现电流稳态无差拍控制的设计准则。
Set up the circuit design criterion for the steady - stage deadbeat control to the line current of a three - phase high-power-factor rectifier based on voltage space-vector PWM.
将有源功率因数校正技术引入UPQC直流储能单元的电压控制。
The active power factor correction(APFC) technology is introduced into the DC energy storage unit ofUPQC for capacitive voltage control.
PWM整流器具有功率因数高、能量可双向流动、直流电压恒定等优点。
PWM rectifiers have the characteristics of large power factor, bidirectional power flow and constant direct voltage.
仿真分析结果证明：该变换器拓扑结构能够使输入电流的包络随着收入电压变化，有效的实现了功率因数校正。
The simulation result proves: Used this converter's topology structure, the envelope curve of import electric current follows entering voltage change. And power factor correction has been realized.
采用傅里叶级数展开计算法、实现对电压、电流、功率因数和电量的测量和计算；
It uses Fourier series in expanding calculus, to achieve the measuring and calculation of volt, current, power factor and quantity of electricity.
通过实验结果表明，单级功率因数校正装置可以实现较高的功率因数、较低的总谐波畸变，而且输出电压纹波小。
Experiment results showed that the correction device of power factor could realize high power factor, low harmonic distortion and low ripple of output voltage.
主要讨论了单位功率因数实现和电容电压平衡问题及其关系。
The relationship between the unity power factor and the voltage balance of the capacitor was discussed.
主要讨论了单位功率因数实现和电容电压平衡问题及其关系。
The relationship between the unity power factor and the voltage balance of the capacitor was discussed.
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