諧波畸變 的英文怎麼說
中文拼音 [xiébōjībiàn]
諧波畸變
英文
harmonic distorsion-
The effect is termed harmonic distortion.
這種作用就稱為諧波畸變。Because of the elements which run under nonideal linearity and unentire symmetry in the power system, the loads which are different and change randomly, the methods which adjust and control the system faultily and operate improperly, the disturbance and the malfunction which happen somewhere, the current and voltage in the supply system are distorted seriously and thus large amount of harmonics are produced
但是，由於電力系統元件運行的非理想線性或非完全對稱、負載的性質各異且隨機變化、調控手段的不完善以及錯誤操作、外來干擾和各種故障的存在，供電網中的電流（電壓）發生畸變，產生大量諧波。Abstract : temporal properties of the second - ordre process with a chirped incident pulse are theoretically calculated. the chirp influences the irradiance and the pulse shape of the second harmonic wave with large phase mismatch. the phase distortion of all three waves is dependent more strongly on the chirp than on the phase mismatch
文摘:討論了在大相位失諧下，基波為頻率啁啾脈沖的二次諧波產生過程，結果表明選取合適的啁啾參量可以使二次諧波的光強提高，但同時會使其波形和相位發生變化.三波相位的畸變主要取決于入射的基波啁啾脈沖，而與相位匹配的失諧量關系不大Series reactor is applied to ac power system with rated voltage of 6kv - 63kv and series connected with shunt capacitor banks for restraining wave distortion in grid voltage so as to improving the quality of power system and ensure the safety of its operation. it can restrain harmonic current and surge current in capacitor banks so that the capacitor will operate reliably
Ckdk型串聯電抗器，適用於6 63 kv電力系統中，與並聯電容器相串聯，用以抑制電網電壓波形畸變，從而改變電網質量和保證電力系統安全運行抑制流過電容器組的諧波電流和限制合閘涌流，從而保護電容器的安全可靠運行。Dry - type air - cored series reactor is applied to ac power sys - tem with rated voltage of 6kv 10kv 35kv and series connected with shunt capacitor banks for restraining wave distortion in grid voltage so as to improving the quality of power system and ensure the safety of its operation
乾式空芯串聯電抗器適用於6kv 10kv 35kv電力系統中與並聯電容器組串聯，用於抑制電網電壓波形畸變，從而改善電網質量和保證電力系統安全運行，抑制流過電容器組的諧波電流和限制合閘涌流，從而保護電容器使之安全運行。In this paper, a method assessing harmonic impedance by synchronously layered distortion waves is proposed, which is based on the " fluctuations method " - a simple and effective means. however the method is based on the fourier transform, which can just precisely analyze the signals whose cycle is integer times as broad as that of fundamental wave. with sampling windows widening, the variations of distorted signals in a fundamental period are weakened
本文是以一種被廣泛採用的非干預式諧波阻抗估計方法? ? 「波動量」法，的基礎上，針對現有方法以直接的fourier變換為分析工具，只能對基波周期的整數倍窗口采樣信號進行分析，畸變信號在一個基波周期內的變化隨采樣窗口增大而被弱化，並且，諧波次數越高，解析度就越低，大大限制了諧波阻抗估計的準確性的提高。In the distribution system, many capacitor banks are applied to decrease the loss of the network. the harmonic resonance may be incurred between the network and the capacitor banks in the harmonic frequency, thus the security of the system may be destroyed because of the high harmonic distortion level
配電網中裝設了大量的電容器進行無功優化來降低網損，但在諧波頻率下，容易產生系統與電容器之間的諧波諧振或諧波放大，從而使系統的諧波畸變率變大，破壞了系統的安全運行。Moreover, the higher harmonic order is, the lower distinguishability, and, as a result, the assessment accuracy becomes bad. considered its prominent localization both in time - domain and in frequency - domain, wavelet is used to the field of assessing harmonic impedance for the first time. we choose chaari wavelet because of its special band frequency characteristic, which can stratify signals synchronously and locate the distortion time precisely in assessing harmonic impedance
選取chaari小波為母小波，利用其特殊的帶通特性，對在公共連接點（ pcc ）采樣得到的電壓，電流畸變波形進行同步分層， 「突出」信號的畸變部分，提高了被分析信號的「信噪比」 ，以利於諧波阻抗估計準確度的提高。This paper focuses on the control strategies to improve the performance of the three - phase ac - dc pwm voltage - source - converters ( vsr ) under unbalanced power supply. the problems such as negative sequences current, voltage and current harmonics and un - constant ( un - smooth ) power flow from ac to dc side are discussed in this paper. the analytical solutions for negative sequence current and harmonic current elimination are obtained by fully feed - forward of negative sequence voltage and producing a non - harmonic current command of the inner - loop
電網不平衡時，基於電網平衡為約束條件設計的三相vsr將出現不正常運行狀態，比如三相vsr交流電流中出現負序分量，使交流電流嚴重不對稱；直流電壓和交流電流中出現非特徵諧波分量，使直流電壓和交流電流波形發生嚴重畸變；三相vsr從電網吸收不平衡的瞬時功率等一系列問題。In accord with the state standard about harmonic. the harmonic permission value of tangqian line is calculated. some measurement data are shown and analyzed, and some main conclusion is drawed that the 7th harmonic voltages of tangqian line is near to the permission value, total harmonic voltage distortion ratio has oversteped the permission value. the 3th harmonic, the 5th harmonic, the 7th harmonic and the 9th harmonic current from tangqian line all overstep the permission, the largest 5th harmonic current ratio in tangsc reaches 44 %, the 7th harmonic and the 9th harmonic current in tang7c and tangsc is large maybe because the harmonic current is magnified. this paper studies the model of each element in tang yin substation
根據有關公用電網諧波的國家標準，計算出湯牽線注入湯陰變電站的諧波電流允許值，從實測數據可以得出一些重要結論：湯牽線7次諧波電壓含有率的最大值接近國標中的限值，湯牽線的諧波電壓總畸變率的最大值已超標；湯牽線注入電網的3 、 5 、 7 、 9次諧波電流都超標；湯6c電容器的5次諧波電流含有率較高，最高達到44 ；湯7c和湯8c電容摘要器的7次和9次諧波電流含有率偏高，原因可能是發生了諧波電流放大現象。The widely applications of nonlinear instruments have produced many high order harmonics, they are flowing into the power network and greatly influence the quality of electric power. and the frequency is n ' t constant but changed around 50hz
電網中非線性設備的使用日益增多，所產生的高次諧波電流大量注入電力線路中，使得電網電壓、電流波形發生畸變，同時電網頻率並不是固定不變的，而是在50hz附近波動。According to the no - loading waveform deviation factor, the prototype conforms to the national design standard and practical needs in the engineering. more important, the high voltage is achieved. in the condition of considering core saturation and damping winding influence, the influence to powerformer of the no - loading tooth harmonic emf is smaller than conventional generator, and the waveform deviation factor of the former is smaller, too
由求得的樣機空載電勢波形畸變率可知，該樣機滿足國家設計標準和工程實用要求，更重要的是，實現了產生高壓的目的；考慮鐵心飽和、考慮阻尼繞組影響情況時，電力發生器與具有相同尺寸（除定子槽形）的傳統發電機相比，空載齒諧波電勢對電力發生器的影響較小，前者的空載波形畸變率較小。The non - ideal bemf waveform of bldcm is often caused by two facts. one is that the platform width of bemf waveform is less than 120 ; the other is the cogging harmonics existed in the bemf waveform
非理想反電動勢波形的無刷直流電機有兩種情況，一種是反電動勢的梯形波的平頂寬度小於120 ；一種是由於磁場分佈受齒槽的影響，反電動勢存在齒諧波，使其波形發生畸變。To put into operation a large amount of non - linear load, make in harmony wave of rural power grids serious becoming in pollution, pass to rural local electric wire netting main in harmony analysis of wave source, put forward in order to restrain from insert rural power grids in harmony wave source voltage total in harmony wave distortion rate and the containing rate change last device number pulsating for increase of goal, increase the pulse of the current change device and install light specified value electricity active wave filter mix with passive wave filter near the harmonics source to control the wave in harmony
摘要大量非線性負荷的投運，使農村電網的諧波污染日趨嚴重，通過對農村地方電網主要諧波源的分析，最終提出了以限制接入農村電網的諧波源的電壓總諧波畸變率和各次諧波電壓含有率為目標的增加換流裝置脈動數，以及在諧波源附近裝設小額定值的電力有源濾波器配以無源濾波器的混合型電力濾波方式，以進行諧波治理。Through the calculation, the filters have been selected corresponding with voltage harmonic distortion standard. and the steady state rating of the parameters are calculated
通過計算，選擇符合電壓諧波畸變標準的交流濾波器，並進行各元件的穩態額定值的計算。Tal series high exchange filter installation, 6 - 35kv exchange mainly for electricity grid, as scheduled filter out the high harmonics currents, reducing grid voltage sinusoidal wave distortions rate, while providing compatibility for mouttalos no credit, improve the power factor lines, lowering the depletion, save energy, clean grid
的電力交流電網中，作為濾除預定的高次諧波電流，降低電網電壓正弦波畸變率，同時為基波提供容性無功提高線路的功率因數達到降低損耗節約電能凈化電網的目的。Tal series high exchange filter installation, 6 - 35kv exchange mainly for electricity grid, as scheduled filter out the high harmonics currents, reducing grid voltage sinus - oidal wave distortions rate, while providing compatibility for mouttalos no credit, improve the power factor lines, lowering the depletion, save energy, clean grid
的電力交流電網中，作為濾除預定的高次諧波電流，降低電網電壓正弦波畸變率，同時為基波提供容性無功提高線路的功率因數達到降低損耗節約電能凈化電網的目的。Harmonic distortion noise
諧波畸變噪聲In order to improve the electric power supply quality, a measure device is needed to analyse the distrubtion of the harmonic pollution in the power supply system
因此有必要對電網中的諧波含量及非線性用電設備可能產生的諧波畸變進行檢測，掌握諧波的產生和分佈情況，以便採取措施抑制諧波危害，提高供電質量。To handle this problem, the mathematical model of distribution optimal operation was set up in the paper. a specific method named genetic algorithm, which was refined by the sensitivity methods applied in the model
針對這一問題，本文提出了諧波畸變情況下對電網進行無功優化規劃的模型，給出了用遺傳演算法進行求解的具體步驟並通過靈敏度方法對遺傳演算法進行了改進。分享友人