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。
Based on the instantaneous reactive power theory, the method of detecting reactive current of agricultural power network is studied.
基于瞬时无功功率理论，对农用电网无功电流的检测方法进行了研究。
The instantaneous reactive power theory is widely used in the detections of harmonic and reactive current in three-phase active power filter.
在该控制系统中实施了基于瞬时无功理论的瞬时功率和瞬时电流的检测算法以及一种开闭环相结合的复合控制策略。
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。
A new method is proposed, based on the instantaneous reactive power theory, to detect high frequency harmonic current and instantaneous reactive current applying high pass filter simultaneously.
基于瞬时无功功率理论提出了一种应用高通滤波器同时检测高次谐波电流和无功电流的新方法。
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。
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。
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。
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。
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 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。
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。
Based on analyzing the common way of harmonic restraint, this paper makes use of the theory of instantaneous reactive power to simulate and design active power filter.
本文在分析抑制谐波常用方法的基础上，利用瞬时无功功率理论进行有源滤波器的仿真设计。
The closed loop control of instantaneous reactive power is used to realize the constant power factor and suppresses the reactive power impact.
系统通过瞬时无功功率闭环，实现了功率因数的恒定控制和无功功率的无静差调节。
From physical and mathematical points of view, this paper analyses the nature of instantaneous active and reactive power.
从物理和数学的角度，对单相电路、三相电路瞬时有功功率和瞬时无功功率的概念进行了剖析。
Moreover, the relations between both the active power and the reactive power and the instantaneous power are also achieved at the same time.
建立了有功功率、无功功率、复功率及复交流功率与瞬时功率的关系，进而仅基于瞬时功率的守恒性便证明了上述功率也满足守恒性。
Moreover, the relations between both the active power and the reactive power and the instantaneous power are also achieved at the same time.
建立了有功功率、无功功率、复功率及复交流功率与瞬时功率的关系，进而仅基于瞬时功率的守恒性便证明了上述功率也满足守恒性。
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