高度功率因數 的英文怎麼說

中文拼音 [gāodùgōnglǜyīnshǔ]
高度功率因數 英文
height power factor
  • 高 : Ⅰ形容詞1 （從下向上距離大; 離地面遠） tall; high 2 （在一般標準或平均程度之上; 等級在上的） above...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 功 : 名詞1 （功勞） exploit; merit; meritorious service [deed]: 戰功 military exploits; 立功 render me...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 因 : Ⅰ動詞[書面語] （沿襲） follow; carry on Ⅱ介詞1 [書面語] （憑借; 根據） on the basis of; in accord...
  • 數 : 數副詞（屢次） frequently; repeatedly
  • 高度 : altitudeheightelevation
  1. It is a problem which database deviser and developers concerning very much that how to regard a dbms application system as a whole availably and to improve its running efficiency. it affects directly the degree of the customer accepts with whole system. it is also a pivotal factor to apply the system successfully

    如何有效地將dbms應用系統作為一個整體，提高其運行效率，是數據庫應用系統設計開發人員十分關心的問題，它直接影響到用戶的接受程度和整個系統的生命力，也是應用系統成功的關鍵因素之一。
  2. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
  3. Featured by wide band gap, high breakage electric field, high electron mobility, low dielectric constant, strong irradiation proof and excellent chemical stability, silicon carbide ( sic ), viewed as one of the most promising wide band gap semiconductors, is widely utilized in optoelectronic devices, high frequency and large power, high temperature electronic devices

    被譽為最有潛力的寬禁帶半導體材料一sic ，因其具有禁帶寬度大、擊穿電場高、熱導率大、電子飽和漂移速度高、介電常數小、抗輻射能力強、良好的化學穩定性等優異的特性，被廣泛地應用於光電器件、高頻大功率、高溫電子器件。
  4. The sample with low emitter efficiency has completed as the method of above. this lead to the greatly decrease of the reverse recovery time and the low reverse leakage and forward voltage, especially the excellent temperature character of the leakage. the test date shows that the samples reach the first class of international level

    本論文作者通過模擬測試，驗證了課題研究的理論設想，並設計製作了具有低陽極發射效率結構的高壓功率frd ，利用局域鉑摻雜和電子輻照相結合的壽命控制方式，實現器件反向恢復時間的極大減小，並且反向漏電流、軟度因子、正向壓降等關鍵參數也較理想，且具有極佳的漏電溫度特性，達到器件綜合性能的優良折衷，達到國際先進水平。
  5. The statistic of wavelet transform coefficient algorithm can solve the periodic noise, high - energy noise and some non - gauss noise simply and effectively ; bi - spectrum can acquire more information from the original signal than power - spectrum, detect more information except from range and restrain the gauss noise. short - time speech signal can be considered as stationary and with periodic non - gauss signal, so we can make use of bi - spectrum to obtain the speech character and separate the speech and noise and detect morse telegraph signal ; complex number spectrum variance algorithm is put forward based on the deeply observing speech data, it is a new algorithm, experiment show that it is simple, effective

    統計演算法在解決周期信號、高能噪聲和高斯信號方面有獨特之處，能簡單有效提取以上噪聲的特徵;雙譜能夠提供比功率譜更多的有用信息，有效地檢測信號幅度之外的其它信息，並能有效抑制高斯噪聲，短時語音信號一般認為是平穩且有一定的周期性的非高斯信號，因而可以利用雙譜來提取語音信號特性並實現信噪分離;復數譜方差演算法是在對語音信號進行深入觀察和分析的基礎上而提出來的一種全新的語音特徵提取方法，此方法簡單而有效的提取了語音、噪聲的特徵以及檢測莫爾斯信號，基於實驗表明，該演算法取得了很好的效果。
  6. The analysis and study on the dynamic efficiency of pmsm performing under the various loads. the influence of machine ' s parameters on dynamic efficiency and dynamic power factor is studied ; this has significant meaning for design of pmsm applied in the various load fields. the theoretical analysis and fem calculation fo air - gap magnetic field of pmsm is done

    在建立永磁同步電動機dq軸數學模型時，考慮了電機的鐵耗和雜散損耗，提高了模擬計算的精度，根據實測的負載變化情況，對永磁同步電動機的動態性能進行模擬，並研究分析了電機各參量對其動態平均效率和動態平均功率因數的影響，總結出變化規律。
  7. A new full - wave measurement circuit structure is put forward that would increase distribution automation system reliability and veracity. the distributed protection and monitoring unit in this paper can instead of general instruments of low voltage distribution system. it not only combines ampere meter, voltage meter, active power meter, reactive power meter and power meter, frequency meter into a meter, but also increases monitoring position switch, control bus switching alternately and monitoring energy

    本文研製的保護和測控單元，可替代低壓配電系統中所使用的常規儀表，將原來迴路需要的電流表、電壓表、有功功率表、無功功率表和功率因數表、頻率表簡化為一塊表，並增加了位置開關量檢測，控制母線投切和電度監測功能，從而極大的簡化了低壓配電二次儀表設計、安裝調試，提高了運行、維護和管理水平。
  8. The controlled object hyvp ( hydraulic pressure vibration platform ) has the property of big loading pressure and rating power, so it need considerable transmitted and control power, it also has the property of high - level math model, and narrow frequency width in closed - loop, and bad stability. this thesis is based on the hpvs in the “ tiema project ”

    被控對象（液壓振動臺）具有負載壓力和額定功率相當大的特點，因此要求傳輸和控制的功率要相當可觀;而且它還具有數學模型階數高、閉環頻帶寬度窄、穩定性差等特點。
  9. The choice of laser output window height is relation to many factors, such as pressure loading, thermal loading, yield stress, influence on wavefront, failure by fatigue. spherical windows can endure higher laser intensity. however, it brings some phaseshifts, which connect with laser windows parameters

    激光器輸出窗口厚度的選取與壓力載荷、熱載荷、材料極限強度、厚度對波前的影響、材料疲勞等多種因素有關，由於球殼窗口能承受較高的功率密度，但窗口本身帶來相移，該相移大小與窗口參數有關，根據位相均方根值選擇球殼窗口參數。
  10. With the elevation of the power factor, stator electric current decrease obviously and its range is about 20 %. so voltage loss and electric power wastage decrease effectively on electromotor power supply circuitry consequently

    隨著功率因數的提高，定子電流明顯的減小，減小幅度在20左右，從而有效地減少電動機供電線路的電壓損失及電力損耗。
  11. This strategy has many advantages : solving the problems that the system is unsteady under super - synchronization ; improving power factor of stator ( it is unity relative to that of rotor ) ; no rotor position sensor and no initial position measurement, easily building up doubly fed speed adjustment system with speed sensorless because adjusting speed is taken in the rotor coordinate and rotor current vector fixing is implemented

    該方案由於引入了定子電流勵磁分量的閉環控制，使系統同時具有轉速和勵磁調節兩個調節通道，具有如下優點：一、解決了超同步工作工況不穩定的問題；二、提高了定子側的功率因數（與轉子側功率因數為1相比） 。三、由於速度調節在轉子坐標系下進行，並以轉子電流矢量定向，所以無須轉子位置傳感器，也不用檢測初始位置，易於組成無速度傳感器雙饋調速系統。
  12. Because direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable for the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function

    在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，採用了目前比較流行的數字信號處理器（ dsp ）作為系統的控制器，其處理速度高的特點正好符合本實驗的需要：在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。
  13. Due to the direct torque control requires very high performance of real - time, the popular microcomputer core dsp is used as controller in the design of hardware. its high speed of running is suitable to the experiment. in the main circuit, there is a highly integrated power element : ipm as inverter, which includes seven igbt, has high switch frequency and fault diagnosis function

    在本控制系統的具體實現上，由於直接轉矩控制對實時性要求很高，因此在硬體方面，本課題採用了目前比較流行的數字信號處理器（ dsp ）作為本實驗的控制器，其處理速度高的特點正好符合本實驗的需要；在主電路中，本系統使用了集成度高的功率器件：智能功率模塊（ ipm ） ，作為逆變環節，其集成了七個igbt ，實現了高開關頻率逆變以及故障診斷的功能，從而使控制系統的體積大大縮小、控制更加靈活。
  14. Full - sealed assembling capacitor is applied to ac power sys - tem 50 60hz with rated voltage of 6kv 10kv 35kv for improving power factor and quality of power grid, reducing transmission loss and raising the efficiency of transmission transformation faciliti - es. this type of capacitor has an assembling full - sealed struc - ture, and it is comprised of capacitor unit body, container, insula - ition cooling impregnant, outlet ceramic bushing, pressurereleas -

    額定電壓6kv 10kv及35kv的交流電力系統中用來提高功率因數改善電網質量，降低線路損耗，充分發揮輸變電設備效能。本產品為裝配式全密封結構。主要由器身波紋油箱絕緣冷卻油出線套管壓力釋放閥溫度控制器等部件組成。
  15. The prototype test results indicate : voltage mode and current mode ac - ac mode ac / ac converters with high frequency link have the advantages such as high frequency electrical isolation. simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, no audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type regulated sinusoidal ac power supply, electronic transformer, ac regulator, and wave converter etc

    試驗表明，這類變換器具有高頻電氣隔離、電路拓撲簡潔、兩級功率變換（ lfac hfac lfac ） 、功率密度高、雙向功率流、無音頻噪音、變換效率高、網側功率因數高等優點。為新一代正弦交流穩壓器、電子變壓器、交流調壓器、同頻波形變換器的實現奠定了關鍵技術基礎。
  16. The 2503ah power analysis instruments come with preprogrammed configurations for electronic ballast testing, several 3 phase and motor test configurations. you may configure the 2503ah - 3ch as 3 independent power analyzers, or as the most advanced 3 phase analyzer. for electronic ballast testing, one channel may be set up to measure line input dais, while the other two channels measure the high frequency signals

    Xitron儀器已為電子鎮流器測試制訂速度與準確度的新標準，高速fft處理器能將鎮流器測試時間縮減可高達75 % ，測試參數包括效率，功率因素，失真及個別的諧波內容， 2503ah系列可完全支援iec - 555符合測試，亦為先進的測試實驗室，測試系統製造商及全球三大照明產品製造商所廣泛採用
  17. Reactive power are calculated using the new algorithm. on the basis of analyzing different kinds of control strategies of var compensation, the paper applies the criterion of voltage and var to control switching and illustrates a improved mode of switching capacitor which can prevent the switched - capacitor from the impacting of instantaneous rush currents by means of zero - crossing triggering of scr components, and can realize auto - tracking var and auto - switching shunt capacitor bank. initial operating parameters are stored in information flash memory of the mcu using flash self - programming technique in order to decrease complexity of the circuit and improve stability

    高壓智能無功補償控制器以flash型16位單片機msp430f149為控制核心，採用了一種相角實時測量的新演算法，並在此基礎上計算出了功率因數、有功和無功，減少了運算量提高了精度；在分析了各種無功補償控制策略的基礎上，以母線電壓和無功功率復合判據控制投切，並提出一種改進的電容器投切方式? ?暫態投切控制晶閘管過零觸發，避免了電容器投切時的電流沖擊；穩態運行時接觸器替代晶閘管，實現無功補償的自動跟蹤和電容器的自動投切，解決了投切時的暫態電流沖擊和穩態時可靠運行的難題；控制器的原始運行參數採用flash自編程技術，將其保存在msp430f149片內的信息flash中，簡化了硬體電路，大大提高了系統的可靠性。
  18. Intelligent ac power factor instrument adopt advanced microprocessor carry out smart control, to the simultaneous input single phase or tri - phase ac voltage and current signal carry out accurate measurement, through cpu automatically count out ac power factor value, which is displayed clearly and visually by high brightness led digital tube, and can select serial communication function

    智能交流功率因數儀表採用先進的微處理器進行智能控制，對同s時輸入單相或三相交流電壓與電流信號進行精確測量，經過cpu自動計算出交流功率因數值，由高亮度led數碼管進行清晰直觀的顯示，並可選擇串列通訊功能。
  19. Adopt advanced microprocessor carry out smart control, to the simultaneous input single phase or tri - phase ac voltage and current signal carry out accurate measurement, through cpu automatically count out ac power factor value, which is displayed clearly and visually by high brightness led digital tube, and can select serial communication function

    採用先進的微處理器進行智能控制，對同時輸入單相或三相交流電壓與電流信號進行精確測量，經過cpu自動計算出交流功率因數值，由高亮度led數碼管進行清晰直觀的顯示，並可選擇串列通訊功能。
  20. Its test results indicate : voltage mode inverters with high frequency link have the advantages such as high frequency electrical isolation, simple topology, two - stage power conversions, high power density, bidirectional power flow, good line current waveform, low audio noise, high converting efficiency, and high input power factor etc. this kind of converter lay the key technical foundation on new type high power density, high efficiency and low cost asi

    設計的1kva270v 10 % dc / 115v400hzac單極性移相控制雙向電壓源高頻環節逆變器原理試驗表明，這類逆變器具有高頻電氣隔離、電路拓撲簡潔、兩級功率變換（ lfac / hfac / lfac ） 、功率密度高、雙向功率流、音頻噪音低、變換效率高、網側功率因數高等優點，為新一代高功率密度、高變換效率、低成本航空靜止變流器奠定了關鍵技術基礎。
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