英汉例句

• the harmonic calculation in three-phase rectifier is derived from the instantaneous reactive power theory.

  依据三相电路的瞬时无功功率理论，推导了谐波电流的计算方法；

• based on the instantaneous reactive power theory the method correctly detects the active positive-ord current from unsymmetrical currents and applies calculated command current to compensate system.

  论述了利用瞬时无功功率理论从三相不对称电流中正确检测出三相正序有功电流，并用计算出的指令电流对系统进行补偿的原理。

• a method which detects harmonic current of three-phase system with dsp based on theory of instantaneous reactive power is presented in this paper.

  根据瞬时无功理论，提出基于dsp的谐波电流检测方法，实现了谐波电流和无功电流的实时、快速检测。

• secondly, the instantaneous reactive power theory and it ' s application to reactive power control and detection are introduced.

  其次，论文还介绍了瞬时无功功率理论及其在无功控制和无功检测方面的应用。

• by using the instantaneous reactive power theory, a kind of improved method in detecting harmonic and fundamental reactive power based on wavelet analysis is(proposed. )

  在小波分析的基础上，结合瞬时无功功率理论，提出了一种谐波和基波无功检测的改进方法。

• fbd harmonic detection algorithm, a formula is derived, left fbd and verified the consistency of the instantaneous reactive power theory relationship.

  说明：fbd算法实现谐波检测，有公式推导，左后验证了fbd与瞬时无功理论的一致性关系。

• a unified model for harmonics and reactive current closed-loop or open-loop detection was established based on instantaneous reactive power theory.

  基于瞬时无功功率理论建立了谐波及无功电流检测系统闭环、开环的统一模型。

• in order to implement real time detection of harmonic voltage, a method for any harmonic voltage detection based on instantaneous reactive power theory was presented.

  基于瞬时无功功率理论提出了一种任意整数次谐波电压的实时检测方法。

• in three-wire-three-phase circuit, instantaneous reactive power flows not only between different phases , but also between the three-phase source an…

  本文同时提出 ，三相三线电路的无功流动不仅存在于各相之间 ，而且也可能存在于电源与负载之间。

• this paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.

  提出了一种异步电机无速度传感器矢量控制的新方法，用瞬时无功功率和励磁电流变化来估计电机转速。

• and a new hybrid speed identification method is also proposed, which based on the neural network, combines the open loop estimator and the instantaneous reactive power model reference adaptive system.

  介绍了异步电动机矢量控制系统神经网络速度控制器的设计方法；同时提出了将开环直接计算与模型参考自适应方法相结合的神经网络混合转速辨识模型。

• the interpretation of active and reactive currents in non-sinusoidal and unbalanced three-phase four-wire systems is given based on the generalized instantaneous reactive power theory.

  以通用瞬时无功功率理论为基础，阐述了电压不对称和非正弦条件时的有功和无功电流的物理意义。

• after a brief introduction of the background and classification of apfs, the method of detecting harmonics based on instantaneous reactive power theory is studied in this paper.

  本文首先简要分析了电力有源滤波技术的发展，对有源电力滤波器进行了分类讨论，并对基于瞬时无功功率理论的谐波检测方法进行了研究。

• then the definitions of average and instantaneous reactive power based on hilbert transforrnation for non-sinusoidal circuit are presented.

  非正弦电路无功功率及瞬时无功功率尚无统一的定义。

• a generalized active power filter(gapf)and the application problem of generalized instantaneous reactive power theory in the referential current detection of gapf are studied.

  分析了基于广义瞬时无功理论为检测方法的配电系统串联型电能质量补偿器的构成及工作原理 ，并用仿真进行了验证 。

• this paper presents four-phase transmission harmonic current detecting method based on instantaneous reactive power theory.

  该文提出了基于瞬时无功功率理论的四相输电谐波电流检测方法。

• the traditional theoretical algorithm of instantaneous reactive power needs two coordinate transformations, which will magnify the calculation load of control system and cause its delay.

  传统的瞬时无功功率理论算法需要两次坐标变换，会使控制系统的计算量变大，会出现计算延时。

• the traditional methods based on definitions of reactive power can not fulfill the demand, so the paper employs the instantaneous reactive power theory to detect the reactive power in svc system.

  传统的根据无功功率的定义来计算svc系统中的无功功率的方法难以满足快速响应要求，因此本文采用瞬时无功理论来实现svc系统中无功功率的计算和检测。

• the detection based on generalized instantaneous reactive power theory is selected after introducing several kinds of reference current detection.

  总结了目前多种参考电流检测方法，选择了基于广义瞬时无功理论的参考电流检测法生成参考电流指令；

• instantaneous reactive power calculated in the measuring circuit is based on instantaneous voltage and instantaneous current value of the supply power line.

  检测电路是基于供电线路的瞬时电压、电流值进行瞬时无功功率的计算，方法简单、易于实现；

• in this paper, we propose and discuss two new control methods for three phase shunt apfs : the sinusoidal line current control method and the instantaneous reactive power compensation control method.

  本论文提出三相并联型有源滤波器的两种新的控制方法，即正弦波化控制和瞬时无功功率的控制方法。