查询词典 instantaneous changes

Harmonic current; reactive current; instantaneous reactive power theory; matlab simulation

谐波电流；无功电流；瞬时无功功率理论；Matlab仿真

On the basis, this paper provide two harmonic current detect methods, and do deep research on the using zero current divided method to achieve harmonic current and instantaneous reactive current real time detecting method.

在此基础上，提出了两种基于该理论的谐波电流检测方法，并对采用零线电流分离法实现的谐波电流及瞬时无功电流的实时检测方法进行了深入研究。

The relationship between the instantaneous value of measured current and the temperature rise was deduced,and the mathematical model of the current transformer was established.

论文中推导了被测电流瞬时值与温升的关系，得到光纤电流互感器的数学模型，利用这一模型，理论上证明了传感器温度输出能准确跟随电流瞬时幅值的变化，量值上有确定关系，能够用来测量电流瞬时值的绝对值。

The instantaneous reactive current theory is suitable for harmonics detection. Finally, this equipment was successful applied in power substation.

本文最终研制完成了这套煤矿电网谐波综合治理装置，并成功实现了该装置在黑龙江省某煤矿电网的挂网运行。

Active power filter ; instantaneous harmonic current detection ; harmonic measuring ; virtual instrument ; LabVIEW

有源滤波器；瞬时谐波电流检测；谐波测量；虚拟仪器； LabVIEW

Agricultural engineering ; instantaneous current ; surge ; MATLAB ; modeling ; simulation

农业工程；瞬流；浪涌； MATLAB ；建模；仿真

The paper introduces an improved harmonic and reactive current detecting method based on there-phase reactive current using instantaneous reactive power theory. By using matlab, simulation model is built, and the results show that this model can exactly detect harmonic and reactive current in time and it is feasible in DSP system.

本文在三相瞬时无功功率理论的基础提出了一种改进的单相无功电流检测算法，并建立了仿真模型，仿真结果表明：该算法可以及时、准确地检测出三相电路中的谐波电流和无功电流，同时也验证了此算法在DSP系统中的可行性。

This paper analyzes the equivalent circuit model of the valve regulated lead-acid battery and the fundament and method of instantaneous high load current in testing internal resistance of the VRLA. The veracity of the model is demonstrated in the following series of experiments in detail.

分析和推导了阀控铅酸蓄电池的等效电路模型以及瞬间大电流放电法在蓄电池内阻检测中的实验原理和方法，随后的一系列实验验证了该模型的准确性。

Based on the compensate admittance model of Steinmetz theory a method is put forward which use instantaneous values of load current and voltage to denote it. The simulations and practical application in the design of SVC model have shown that the proposed method is very effective, accurate, and with fast response performance.

本文基于不平衡负荷的平衡化原理(即Steinmetz原理)的补偿导纳模型，采用负荷电流电压瞬时值采样的方法补偿无功功率，并将该方法应用于SVC样机的设计，结果表明，它们是快速有效和准确的，具有实际的工程应用价值。

In the experiment of motor, instantaneous value of voltage and current are accurately measured, and then software in the computer can be used to analyze the spectrum and filter the data. These operations improve the veracity, and greatly reduce the difficulty in testing.

在电机试验中，准确地测出电压和电流值后，可以利用数据处理程序进行频谱分析以及滤波处理等操作，提高了准确性，并大大降低了测试难度，并获得电机控制中所需的基本参数。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。