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fundamental voltage
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  基波电压
     Influence of dead-time on the output fundamental voltage of close-loop controlled SPWM inverter
     闭环SPWM逆变器死区时间对输出基波电压的影响
短句来源
     A new method,in which proper fundamental is added to the instruc- tion current so that the passive filter part is forced to bear the fundamental voltage,is proposed.
     研究一种通过在指令电流中加入适当基波分量,迫使混合有源滤波器中的无源滤波器部分承担电网基波电压的方法,将电流源控制策略应用于并联混合有源电力滤波器。
短句来源
     A NOVEL ALGORITHM OF SVPWM INVERTER IN THE OVERMODULATION REGION BASED ON FUNDAMENTAL VOLTAGE AMPLITUDE LINEAR OUTPUT CONTROL
     基于基波电压幅值线性输出控制的SVPWM过调制新算法
短句来源
     Based on the analysis of the vectors of the rectifier, a control scheme is proposed, in which the amplitudeand phase decoupling of AC fundamental voltage are controled separately.
     通过对整流器相量关系的分析,提出一种将整流器交流侧基波电压幅值和相位解耦控制的控制策略,该控制策略具有原理清晰、控制简单、实现容易等优点。
短句来源
     The Condition Verification of Generator Paralleling Based on the Synthetic Phasor of Positive Sequence Fundamental Voltage
     基于正序基波电压合成相量的发电机并网条件核算法
短句来源
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  “fundamental voltage”译为未确定词的双语例句
     The large-sized generator ought to install the ground fault protection based on the zero-sequence fundamental voltage (3U 0)with the setting value not less than 5 V.But in the field operations,The 6 kV station service electrical system took place single-phase-to-ground faults reaulted in the zero-sequence fundamental voltages of generator reaching to 13.2 V and 11.9 V respectively,and the stator ground protection maloperated.
     大型发电机应装设动作电压 ≥5V的基波零序电压 (3U0 )定子单相接地保护 ,但实际运行中 ,6kV厂用系统单相接地时 ,发电机侧基波零序电压高达 13.2V和 11.9V ,造成发电机单相接地保护误动。
短句来源
     Protection schemes based on the zero sequence fundamental voltage and the third harmonic voltage and the injection voltage are presented in this paper, and based on which, the factors which affects the protection schemes based on the zero sequence fundamental voltage and the relevant measures is presented.
     本文在对基波零序电压型定子接地保护、三次谐波电压型定子接地保护和外加电源式定子接地保护各种方案的构成原理及其优缺点进行分析的基础上,详细分析了影响基波零序电压型定子接地保护的各种因素,并提出了相应措施。
短句来源
     Furthermore, in terms of the relationship among the fault location, zero-sequence fundamental voltage, fault phase voltage, winding capacitance to ground and grounding transient resistance, which is obtained by the injection 20 Hz voltage protection, the fault location is calculated.
     进一步利用故障位置与发电机零序电压、故障相相电压、对地电容以及接地故障过渡电阻之间的关系,计算出具体的故障位置,其中,接地故障过渡电阻值由外加20 Hz电源定子单相接地保护计算得到。
短句来源
     Thus, Based on the analysis of the mathematical model of unipolar PWM output waveforms with Walsh function, this paper proposes a method to solve the switching angles quickly in the full range of variation of fundamental voltage.
     为此,该文在分析基于Walsh函数的单极性PWM输出波形的数学模型的基础上,提出了一种快速求解基波幅值整个变化范围内开关角的全部解的方法。
短句来源
     With the positive sequence fundamental voltage components and its minus Hilbert transformation as elements,a PQ transformation matrix is constructed. The active power P and reactive power Q can be obtained through the PQ transformation of the stator currents.
     以三相基波正序电压及其希尔波特变换构造PQ变换矩阵,用其对定子三相电流进行变换,得到有功功率P和无功功率Q。
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  相似匹配句对
     Some Fundamental Aspects of High-Voltage and Insulation Techniques
     高电压和绝缘技术中的几个基础问题
短句来源
     Research on the Fundamental Techniques of Medium-High Voltage Converter
     中高压功率变换相关技术的基础研究
短句来源
     voltage of work;
     工作电压;
短句来源
     Fundamental Immunology
     新书介绍——《基础免疫学》
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     The fundamental premise of N.
     N.
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  fundamental voltage
The height of radiation-induced steps at rational multiples (1/m) of the fundamental voltage can be obtained from analytic conditions applied to the solution of the differential equation describing the equivalent circuit of the junction.
      
We construct the PQ transformation matrix with the positive sequence fundamental voltage components and their Hilbert transformation as elements.
      
The research ranges from fundamental voltage balancing techniques to control issues of a proposed active filter.
      
The switching frequency in the steady-state depends on the fundamental voltage content u1 of the switched waveform.
      
The output power factor is approximately 0.6 with a significant displacement angle between the fundamental voltage and current.
      
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This paper uses the method of the double Fourier series to analyze in detail the spectrum of P.W.M.inverter using the double-edgesym- metrical triangular carrier wave and the sinusoidal wave under the asynchronous modulation condition, and it describes the regularities and characteristics of the spectrum, It also makes an analytic computation of the synchronous modulation condition as a particular example of the asynchronous modulation condition and provides the formula for calculating the fundamental voltage...

This paper uses the method of the double Fourier series to analyze in detail the spectrum of P.W.M.inverter using the double-edgesym- metrical triangular carrier wave and the sinusoidal wave under the asynchronous modulation condition, and it describes the regularities and characteristics of the spectrum, It also makes an analytic computation of the synchronous modulation condition as a particular example of the asynchronous modulation condition and provides the formula for calculating the fundamental voltage nonlinear change when inverter translates with the little chopping ratio, At last, it further studies the necessity and behaviour of an"in-phase modulation"as well.

本文采用双重付氏级数的方法,对双边对称三角波正弦波调制逆变器在异步调制工况下的频谱进行了较详细的研究,揭示它的规律和特点;同时也将同步调制工况作为异步调制工况的一个特例进行了分析计算,给出了小载波比转换时基波电压非线性变化的计算公式;最后还对同相调制工况的必要性和特点作了进一步的研究。

A new simulative for the zero sequence voltahes of large turbo-generator with a stator ground fault is presented in this paper. The digital simulation can be used to obtain correct fundamental and third harmonic zero sequence voltages at the neutral and the terminal of the generator and flexiblely study the characteristics of various generator stator ground fault protection schemes.For the purpose of the simulation, eqiova;emt corciots based on the actual connection of coil-groups of the generators are built...

A new simulative for the zero sequence voltahes of large turbo-generator with a stator ground fault is presented in this paper. The digital simulation can be used to obtain correct fundamental and third harmonic zero sequence voltages at the neutral and the terminal of the generator and flexiblely study the characteristics of various generator stator ground fault protection schemes.For the purpose of the simulation, eqiova;emt corciots based on the actual connection of coil-groups of the generators are built according to the distribution of the fundamentsl voltage and the third harmonic potential. Most large generators have a 60 degree phase band of the fundamental frequensy, so a 180 degree phase band of the third harmonic frequency, and their nutrals are grounded through a high impedance.In this case, the turn-voltage phasors under one pole, such as N pole, can then be constructed as an upper half circular arc of 60 degree for the fundamental frequency and 180 degree for the third harmonic frequency, and thar under the neighboring pole, such as S pole, as a lower hslf circular arc.The distribution of the fundamental voltage and the third harmonic potential depends on combining these circular arcs according to the number of poles and the connection method of stator winding of a cirtain generator, when a ground fault occurs, fundamental voltage and the thirs harmonic potential, as well as the distributed capacitance between the winding and the ground, are divided into two parts by the ground fault point.Based on that, a new simulative model os built after correctly processing of phase relation.All details for the simulation have been discussed about various large turbo-generator in this paper.

本文依据大型汽轮发电机定子绕组的结构(如极数;线圈组及相绕组联接方式等等),建立了新的接地故障时零序电压的数字仿真模型。某些难以处理的因素会使机端对中性点三次谐波电压之比值在不同正常运行工况下发生变化,对此本文则建议用实测值来修正仿真结果,并给出一种简便的修正方法,该仿真可被用来分析各种定子接地故障保护方案的特性。

In this paper,recursive least square algorithm was used to estimate the real part and imaginarg part of the complex amplitude of the fundamental voltage of the input signals that suf-fered noise pollution. The effective value of currents,voltages, active power and reactive power were calculated. the frequency and power factor were measured by using voltage phase anglechange. The accuracy of measurement was raised, the velocity of convergence was improved andcalculating quantity was decreased...

In this paper,recursive least square algorithm was used to estimate the real part and imaginarg part of the complex amplitude of the fundamental voltage of the input signals that suf-fered noise pollution. The effective value of currents,voltages, active power and reactive power were calculated. the frequency and power factor were measured by using voltage phase anglechange. The accuracy of measurement was raised, the velocity of convergence was improved andcalculating quantity was decreased by adaptive sampling.

根据递推最小二乘算法,从受到干扰污染的输入信号中估计基波电压(电流)复数振幅的实部和虚部,利用它们对电流、电压、有功功率和无功功率的有效值进行计算,利用电压相角变化来测量频率和功率因数。通过自适应调整采样间隔,保证当频率改变时每周波均匀采样N点,提高了测量精度,加快收敛速度,减小计算工作量,从而减小响应时间。

 
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