The single-phase harmonic current components can also be detected by the method effectively through constructing a dummy symmetry three-phase power system.
通过构造一个虚拟的三相对称系统，该检测方法可以推广到单相电力系统的谐波电流检测。
The three phase system is more efficient in that for the same mechanical power a greater total electrical output is obtained.
三个阶段的系统，更有效，为同一机械动力更大的总电力输出表达式。
Based on the decoupling of fundamental power flow and harmonic power flow, a separate iteration method for calculating three-phase asymmetrical harmonic power flow in power system is presented.
以基波潮流和谐波潮流的解耦性为基础，提出了一种将电力系统三相不对称基波潮流和谐波潮流分离迭代的计算方法。
It is necessary to design the monitoring system of high-power three-phase inverter to improve its levels of safety, reliability, control and automation.
为了提高大功率三相逆变电源系统运行的安全性、可靠性、可控性和自动化程度，设计其监控系统是必要的。
For high power system, every switch of three-phase inverter is actually made up of four MOSFETs in Parallel.
考虑到系统功率较大，三相桥式功率变换器的每个开关器件均采用四个MOS管并联的结构。
By comparison of test results of two prototypes, it is shown that the capacitor three phase induction generator is worth being popularized in winding power system.
通过两台样机进行实验对比，实验数据表明三相电容式异步发电机在风电系统中有很高的应用推广价值。
In this paper, two types of main power circuits and their control methods are introduced when constructing active power filter in three phase four wire system.
本文介绍了在实现三相四线制有源电力滤波器时所采用的两种不同的主电路结构及其控制方法。
In the second chapter, three-phase models for distribution system elements are established, which is the basis of three-phase power flow.
第二章建立了配电网络各种元件的三相数学模型，这是三相潮流计算的基础。
In accordance with the feature of three phase unbalanced loads, this article describes the correction principle of reactive power and the control system of single board computer.
本文针对三相不平衡负载特点，介绍了无功功率补偿原理和单板机控制系统。
A new DSP based hybrid power filter designed under the condition of three-phase four-wire system is presented.
介绍了一种基于DSP的三相四线制系统混合型电力滤波装置。
The test on three phase alternating voltage has shown that this system has good reliable performances and can afford evidence for finalizing the design of power supply system made in our country.
通过对三相交流电压的测试试验，验证了该系统的可靠性，可为国产电源系统的设计定型提供依据。
Three unbalanced phase loads varies randomly to lead to three phases unbalance in low voltage distribution system, which brings a series of problems on power grid.
在电网中，三相负荷随机变化，产生三相不平衡，从而给电网带来了一系列的问题。
Three unbalanced phase loads varies randomly to lead to three phases unbalance in middle and low voltage distribution system, whi ch brings a series of problems on power grid.
在中低压配电网中，三相负荷随机变化，产生三相不平衡，从而给电网带来了一系列的问题。
The definition and national standard of three-phase unbalance in power system were expatiated.
三相负荷不平衡以及系统元件三相参数不对称都会引起电力系统三相不平衡。
In the industrial power distribution system simulated and via RS-485 bus, the prototype realizes the control of general electric equipments, such as the three-phase motor, the fan, and so on.
样机实现了在模拟工业配电环境中通过RS- 485接口控制三相电机、风扇等常用电器设备。
A new harmonic detection way based on the single-three phase method and instantaneous reactive power theory was adopted to detect single-phase power system.
采用了单相-三相构造法和瞬时无功理论的谐波检测方法来检测单相系统。
The factors influencing the control system based on three-phase VSR are analyzed, and some theory strategies for the control system design in unbalanced power grid are provided.
通过对三相VSR在电网不平衡条件下影响其控制的因素分析，为设计三相VSR在电网不平衡条件下的控制策略提供理论基础。
The paper builds an integrated simulation model including respective subsystems for three phase shunt power active harmonic compensation system based on SIMULINK function of MATLAB.
本文在基于MATLAB的SIMULINK为三相并联型电力有源谐波补偿系统建立了一个包括各个子系统在内的整体仿真模型。
The experimental results indicate that this method can be used to detect the reactive power and harmonic current exactly in three-phase four-wire system.
通过试验验证，该检测方法能够很好的实现对三相四线制系统中的无功和谐波电流的检测。
It covers five aspects: supply voltage tolerance, utility harmonic, three-phase voltage unbalance, power system frequency tolerance, voltage fluctuation and flicker.
它涵盖五个方面：供电电压允许偏差、公用电网谐波、三相电压不平衡度、电力系统频率允许偏差、电压允许波动和闪变。
Because of the better structure and balance characteristic compared with other transformer used in electric railway, the three-phase to four-phase transformer can apply to AT power supply system.
与其它牵引变压器相比，三相变四相变压器具有较好的结构和平衡特性，可以用于电气化铁路AT供电。
The three-phase short circuit currents of bulk electric power system are very high, and the high currents do harm to the working of the system.
针对三相短路电流产生的电动力进行分析，经过受力分析，瞬间较高的电动力对户外柱上真空断路器的影响很大。
A new intelligent three-phase sinusoidal variable-frequency power based on XC164 as its core module is presented. The design of hardware and software about the system are discussed.
基于单片机智能化和开关电源高效率的特点，研制出一种以xc164单片机作为核心控制模块的智能型三相正弦波变频电源。
Apply to indoor 312 kv three-phase ac 50 (60) hz power system in various models and high-voltage switchgear supporting the use, can be as high voltage apparatus equipment maintenance with grounding.
适用于户内312kv三相交流50（60）hz的电力系统内和各型号高压开关柜配套使用，亦可作为高压电器设备检修时接地用。
Apply to indoor 312 kv three-phase ac 50 (60) hz power system in various models and high-voltage switchgear supporting the use, can be as high voltage apparatus equipment maintenance with grounding.
适用于户内312kv三相交流50（60）hz的电力系统内和各型号高压开关柜配套使用，亦可作为高压电器设备检修时接地用。
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