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fundamental power factor
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  基波功率因数
     The control mode under investigation sets a constant current on the rectifier side and a constant voltage on inverter side. The influences of the compensation factor of series capacitors in CCC have been investigated on the HVDC transmission system's extinction angle,the active and reactive power flows between the converter and the AC system,voltage of the bus at converter stations,and fundamental power factor of the converter.
     研究了整流侧定电流、逆变侧定电压控制方式下,CCC中串联电容器补偿度对稳态运行中的HVDC输电系统的熄弧角、换流器与系统间交换的有功功率、无功功率、换流母线电压以及换流器的基波功率因数等的影响。
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  “fundamental power factor”译为未确定词的双语例句
     The cintrol technique is applied to control the duty ratio d of the switch in real time such that in each cycle the average value of the chopped waveform at the switch rectifiers output is exactly equal to the control reference, unity fundamental power factor and low current distortion can be achieved.
     运用该控制技术去实时控制开关的占空比使得在每个开关周期内,开关整流器输出斩波波形的平均值恰好等于控制基准信号,可以实现三相单位功率因数和低电流畸变。
短句来源
     The control technique is applied to control the duty ratio d of the switch in real time such that in each cycle the averaged of the switch in real time such that in each cycle the average value of the chopped waveform at the switch rectifiers output is exactly equal to the control reference, unity fundamental power factor and low current distortion can be achieved.
     运用该控制技术去实时控制开关的占空比使得在每个开关周期内,开关整流器输出斩波波形的平均值恰好等于控制基准信号,可以实现三相单位功率因数和低电流畸变。
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  相似匹配句对
     power;
     权力 ;
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     Subjectivity:the power of fundamental education
     主体性:基础教育的生命特征
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     the power;
     动力论;
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     Power Balance and Fundamental Wave Analysis
     功率平衡与基波分析法
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     e. fundamental goals.
     五是根本目标不同。
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Four-quadrant converter is a new type of sourceside converter in the AC-DC-AC drive system for electric locomotives, It's advantages are, very high fundamental power factor, less disturbance of harmonic current and excellent performance of regenerative braking,In this paper, the principle of four-quadrant converter is theoretically analyzed; as a result the vector diagrams and fundamental calculation formulas of the main circuit under non-ideal conditions are obtained and the selection of main circuit...

Four-quadrant converter is a new type of sourceside converter in the AC-DC-AC drive system for electric locomotives, It's advantages are, very high fundamental power factor, less disturbance of harmonic current and excellent performance of regenerative braking,In this paper, the principle of four-quadrant converter is theoretically analyzed; as a result the vector diagrams and fundamental calculation formulas of the main circuit under non-ideal conditions are obtained and the selection of main circuit parameters discussed, It also puts forward an analogous vector control circuit for parallel operation of two-phase duplex machine sets.

四象限变流器是电力机车交-直-交传动系统中的新型电源侧变流器。它具有很高的基波功率因数、较低的谐波电流干扰和优异的再生制动性能。本文对四象限变流器的原理进行了理论分析,得出了在非理想条件下主电路的矢量图和基本计算公式。并讨论了主电路参数的选择及用于两相两重机组并联运行的模拟矢量控制电路。

This paper presents a detailed analysis of static and dynamic characteristics of an HVDC transmission system with capacitor commutated converter(CCC) based on a SIMULINK simulation.The control mode under investigation sets a constant current on the rectifier side and a constant voltage on inverter side.The influences of the compensation factor of series capacitors in CCC have been investigated on the HVDC transmission system's extinction angle,the active and reactive power flows between the converter and the...

This paper presents a detailed analysis of static and dynamic characteristics of an HVDC transmission system with capacitor commutated converter(CCC) based on a SIMULINK simulation.The control mode under investigation sets a constant current on the rectifier side and a constant voltage on inverter side.The influences of the compensation factor of series capacitors in CCC have been investigated on the HVDC transmission system's extinction angle,the active and reactive power flows between the converter and the AC system,voltage of the bus at converter stations,and fundamental power factor of the converter.Furthermore,the single-phase earth fault and phase-to-phase short-circuit fault in the main bus at rectifier station are respectively simulated with an emphasis on the recovering process of bus voltage and the relationship between the bus voltage sag and the critical compensation factor.The simulation results indicate that under the control mode,the compensation factor of series capacitors should be selected in such a way that the commutation failures could be avoided and AC system's instability could be maintained as much as possible.It is also found that a bigger compensation factor does not necessarily bring a better result.

利用MATLAB中的SIMULINK仿真工具对逆变器为电容换相换流器(CCC)的高压直流(HVDC)输电系统的稳态特性和暂态特性进行了仿真计算,并对仿真结果进行了详细的分析。研究了整流侧定电流、逆变侧定电压控制方式下,CCC中串联电容器补偿度对稳态运行中的HVDC输电系统的熄弧角、换流器与系统间交换的有功功率、无功功率、换流母线电压以及换流器的基波功率因数等的影响。对整流站换流母线处分别发生单相接地和相间短路两种故障形式进行了仿真计算,并研究了换流母线电压的恢复过程及电压暂降与临界补偿度的关系。研究表明考虑到稳态和暂态特性,在整流侧定电流、逆变侧定电压这种控制方式下,CCC的串连电容器补偿度的选择要兼顾防止换相失败和防止引起交流系统不稳定来考虑,并非越大越好。

 
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