A real time method for detecting the fundamental component of the line voltage under distorted circumstance is proposed in the paper.
提出了一種在電網(wǎng)電壓畸變情況下依然適用的電網(wǎng)電壓基波(分量)的實時檢測方法。
Calculating the fundamental component from fault transient signals quickly is a crux of microprocessor protective relay to operate in time.
提出了短窗積分提取基波(分量)法 ,即首先選定采樣短窗及其上的一族基函數(shù) ,由此建立積分線性方程組 ,通過解方程組得出基波(分量)的值 ,并給出了理論推證。
This paper discusses the method by which fundamental components are calculated with Wallis function algorithm in computer relay protection, calculates the effect of nonperiodic components on the accuracy of Wallis function algorithm, probes into the measures removing the effect of nonperiodic components, and compares Wallis function algorithm with Fourier algorithm.
本文論述沃爾什函數(shù)算法在微機繼電保護中計算基波(分量)的方法,計算非周期分量對沃爾什函數(shù)算法精度的影響,探討消除非周期分量影響的措施,并對沃爾什函數(shù)算法與傅里葉算法進行比較和分析。
What the subject researching is that power energy should be measured with base wave ammeter to power systematic nonlinear user;And that it is high veracious by base wave AC parameters measurement method to those not bad contaminative.
本課題所研究的問題是針對電力系統(tǒng)非線性負載用戶采用基波電度表來計量電能；而對諧波污染不嚴重的線性用戶采用基波交流參數(shù)測量的方法仍然具有較高的準確性。
A kind of fundamental wave equivalent circuit of dielectric-barrier discharge ozone generator powered by sinusoidal voltage is proposed.
提出了一種新的正弦電壓供電DBD型臭氧發(fā)生器基波等效電路,該電路由非線性基波等效電阻Re和基波等效電容Ce簡單并聯(lián)組成。
In the end of 20th century,two main flowings were formed,including the algorithms based on motor s fundamental wave model with Park transformation and the high-frequency injection algorithms with high-frequency injection based on the motor s harmonic model.
無(位置、速度)傳感器控制是當前國內(nèi)外交流電機傳動的熱點,在20世紀末已經(jīng)形成了以交流電機的Park方程為基礎的基于電機基波模型的無傳感器控制和以高頻信號注入法為基礎的基于電機諧波模型的無傳感器控制兩大體系。
This paper introduces a method of calibrating and processing angular speed fluctuation in NI sampling system—PXI-6281,it accomplishes the acquisition of angular speed fluctuation by distortion of signal,analyzing fundamental wave,high-order harmonic of angular speed feedback signal,and calculating the amplitude ratio of base-wave and high-order harmonic.
利用N I的PX I-6281高速數(shù)據(jù)采集卡來完成角速度波動信號的采集,借鑒信號失真度的概念,分析角速度反饋信號的基波和高次諧波大小,求取高次諧波與基波幅值比,作為角速度波動率。
A power quadrilateral consists of apparent power S,active power P,reactive power Q,and distortion power N,or is composed of a fundamental harmonic power triangle and a harmonic power triangle.
功率四邊形也可看成是由基波功率三角形和諧波功率三角形組成的。
In this paper, we make use of Fourier series to analyze the fundamental harmonic of the SPWM and make a conclusion that the larger carrier frequency ratio(N) is, the better resolution of modulation is.
本文首先對正弦脈寬調(diào)制(SPWM)的基本原理進行了說明,并利用付利葉級數(shù)對SPWM 基波進行了分析,得到載波比N 越大調(diào)制效果越好的結論,但N 受功率開關器件本身允許頻率限制,N 不能過大。
Acquisition of fundamental waveforms based on neural network;
一種基于神經(jīng)網(wǎng)絡的基波(分量)提取方法
A new fundamental waveform electronic watt-hour meter was developed with its designed method proposed.
介紹了一種新型基波電子式電能表的設計方法,分析了電子式電能表的發(fā)展趨勢,討論了在諧波存在下電能計量的不準確性,闡述了新型基波電子式電能表的設計方案,電能計量部分確定采用DSP芯片通過軟件編程實現(xiàn)。
A new fundamental waveform electronic watt-hour meter is developed.
介紹了新型基波全電子式電能表的設計方法,分析了電子式電能表發(fā)展情況和發(fā)展趨勢,討論了在諧波存在下電能計量不準確的原因,闡述了新型基波全電子式電能表的設計方案,電能計量部分確定采用DSP芯片通過軟件編程實現(xiàn)低通濾波和電能計量,軟件采用適于本表計的前后臺軟件結構。
The PWM inverters are applied to produce fundamental currents, which are injected the multiple compensation secondary windings.
該單元向相應的二次側注入幅值相同、相位相反的基波電流,在補償系數(shù)等于1或略大于1時,在串聯(lián)變壓器一次側對基波呈近似為0的阻抗,而對諧波呈現(xiàn)高阻抗,從而迫使諧波流入無源支路。
A practical 3 phase series active power filtering device is investigated based on the principle of the fundamental magnetic flux compensation.
根據(jù)基波磁通補償?shù)臑V波新原理研制了一套三相有源電力濾波裝置 ,該裝置采用 3個獨立的串聯(lián)變壓器和 3套獨立的逆變器 ,以便應用于實際中可能出現(xiàn)不對稱的三相負載。