最高系統電壓 的英文怎麼說

中文拼音 [zuìgāoxìtǒngdiànyā]
最高系統電壓 英文
maximum system voltage
  • 最 : 副詞（表示某種屬性超過所有同類的人或事物） most; best; worst; first; very; least; above all; -est
  • 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...
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 壓 : 壓構詞成分。
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  • 電壓 : voltage; electric tension; electric voltage
  1. Thirdly, the paper discusses the driver of the peripheral equipment, how to port the uc / os - n and uclinux, h. 323 protocol and the application of the system in the digital speech classroom. also some software and hardware measure are adopted to enhance the system stability. at last, the shortcoming and the something to be improved are given. dsp can be used to realize real - time speech coding algorithm, and after porting ( ac / os - n, arm can manage the keyboard, the lcd and the ethernet peripheral etc. then the embedded network system with specific purpose can be used in others fields, such as pda, set of top, web tv, ect

    在實際設計實現中，為提高系統軟、硬體整體穩定性和可靠性，使用了以下幾種方法： （ 1 ）低電壓復位、抗電源抖動能力、增加時鐘監測電路、抗電磁干擾能力、散熱等技術； （ 2 ）多層pcb設計，線路板結構緊湊，電源部分採用數字5v 、 3 . 3v 、 3v 、 1 . 8v和模擬5v多電源供電； （ 3 ）選用表面貼和bga封裝的器件； （ 4 ）按照軟體工程的要求進行系統分析，規劃系統框圖、流程分析、模塊劃分，減小了不同模塊的相關性，從而最大限度避免了錯誤的發生。
  2. ( 8 ) by studying match between the electronic system and catalytic converter on the base of electronic controlled bypassing air system, conclusions having been gotten as follows : higher conversion efficiency of emission have gotten when a / f fluctuates at definite scope and frequency, by controlling the comparing voltage of 02 sensor, the working scope of catalytic converter can be controlled and the matching that can fulfill the high efficiency of hc, co, nox at same time has been optimized

    （ 8 ）進行基於所開發的電控補氣系統上的催化器與電控系統的匹配研究，當控制系統調節空燃比在一定范圍按照一定頻率進行波動時，可以提高催化轉化器的轉化效率；通過控制氧傳感器的比較電壓，可以控制催化轉化器的工作窗口，實現排放污染物中， hc 、 co 、 nox轉化的最優匹配。
  3. In view of this situation this article has conducted research to the design of metallurgy auxiliary biography with the frequency conversion table electrical machinery first multianalysis to the frequency changer and the frequency conversion table electrical machinery movement characteristic is carried out, the voltage waveform harmonious which the frequency changer outputs is big, attacks in a big way, and the voltage climbing rate reaches as high as 6600v / mu s which is 20 times ordinary sine alternating voltage, the rolling mill auxiliary biography table set the extremely strict request to the electrical machinery ; its movement frequency is very low, rate frequency in 8 - 20hz ; the velocity modulation scope is wide, the lowest movement frequency lowers to 1hz, and the starting number of times is quite frequently, each hour reaches as high as 600 - 800 time, the impact shoulders in a big way, the overload capacity request is high

    針對這一情況本文對冶金輔傳用變頻輥道電機的設計進行了系統研究。首先對變頻器和變頻輥道電機的運行特性進行詳細分析，變頻器輸出的電壓波形諧波大，沖擊大，電壓上升率高達6600v / s ，是普通正弦交流電壓的20倍;軋機輔傳輥道對電機提出了十分嚴格的要求:其運行頻率很低，額定頻率在8 - 20hz ;調速范圍寬，最低運行頻率低到0 . 5hz ，起動次數相當頻繁，每小時高達600 - 800次，沖擊負荷大，過載能力要求較高。
  4. In order to meet increasingly stringent emission regulations, and to improve fuel consumption, drivability and comfortability of diesel engines, electronically controlled high pressure common rail fuel injection system is the best choice

    摘要為了滿足日益苛刻的排放法規，不斷提高柴油機的經濟性、動力性和舒適性，高壓共軌電控燃油噴射系統是最佳的選擇。
  5. Secondly, compared with some other kinds of comparator structure and based on the preamplifier - latch fast - compare theory, a novel topology of cmos preamplifier latch comparator circuit is presented. considering trade - off between kickback noise and power dissipation, reference resistance value is optimized. according to the encode demands of different stage resolution, clock - control encode circuit is designed

    其後，在具體的子adc設計中，對比各比較器類型的優缺點，並基於預放大鎖存快速比較理論，提出一種新型高速低功耗預放大鎖存比較器電路拓撲;根據adc系統所允許的參考電壓最大波動限制，在回饋噪聲對輸入參考電平的影響和功耗之間折衷，確定優化的參考電阻串阻值;根據不同級精度的編碼要求，設計出時鐘控制編碼電路。
  6. The matrix of time and space for development of hydrogen energy system in china will instruct this work comprehensively, scientifically and objectively ; for beijing case and from all the aspects of energy, environment and economy, the best plan of hydrogen energy system about fuel cell vehicles is : hydrogen is produced by natural gas steam reforming in the central factory, then transported to the refueling stations in the hydrogen tube trailer by the trucks, and filled to the fcb using hydrogen gas

    這一工作應在燃料電池汽車氫能系統發展時空矩陣的指導下有計劃、有步驟地完成；燃料電池汽車在我國最早實現商業化的時間是2008年（奧運會） ，地點是北京，車型是燃料電池公共汽車。針對這一案例，綜合考慮燃料電池汽車氫能系統「從井口到車輪」全生命周期的能源利用效率、環境影響和經濟性指標，最佳的方案是：在集中制氫廠採用天然氣蒸汽重整制氫，用汽車將裝有氫氣的高壓氣瓶輸運到氫氣加註站，加註給以氫氣為燃料的燃料電池公共汽車。
  7. Test results indicated : with the hoist of altitude, the increase of ice amount and the rise of pollutant, the average flashover voltage reduced. the character exponent generally depends on the insulator profile, ice amount, ice state and pollution severity etc. by means of a high - speed camera, a data acquisition system and high voltage test facilities, a series of the flashover processes on ice surfaces were record. the experimental results form this study and the subsequent theoretical analyses suggested : the thermal ionization of the air in front of an arc root resulted in arc movement ; the electrostatic force had an auxiliary effect of impelling arc propagation ; the electrical

    通過對攝像機、數據採集系統及高壓試驗裝置記錄覆冰絕緣子表面閃絡電弧的發展過程的試驗結果進行理論分析得出：弧根周圍空氣的熱電離導致了電弧的發展，靜電場力對電弧的發展起到了加速作用，電擊穿僅發生在閃絡最終的跳躍階段；通過測量閃絡過程中的放電電壓、泄漏電流、閃絡時間、覆冰水電導率、電弧長度及電弧半徑等參數，得到了不同階段電弧（電弧起弧階段、電弧發展階段及完全閃絡）的發展速度、臨界電弧長度均隨覆冰水電導率的增加而減小。
  8. To avoid the serious electromagnetic interferer, the analog signals are transformed to frequency pulses which are transferred to the kernel of the system. in the measure of the groove voltage, the method of float - ground is adopted to avoid the high common signal and the range switch circuit is designed to solve the conflict of the wide dynamic range and the high precision. least square curvefit is adopted to reduce the system error

    鋁電解生產現場電磁干擾非常嚴重，為此我們將需要測量的模擬信號就近轉換為頻率脈沖后再傳送到控制核心；採用浮地接入方式消除槽電壓信號中的共模成分；設計了量程自動切換電路以解決槽電壓的動態范圍寬和測量精度高的矛盾；用最小二乘法進行曲線擬和以降低測量的系統誤差。
  9. Comparing and analyzing the synchronous control strategy, which brings up the new method to control the double un - symmetry jars proceed synchronously with the combination of proportional valve and servo valve, which forms closed loop control ; basing on the above methods, models are made to get mathematics models of position control system and to analyze system model theoretically by using pid controller, we can realize regulating parameters, minimizing synchronous errors and enhancing the dynamic performances ; the simulink tool box in matlab software is used to imitate the system according to the model, which not only makes the result visual and easy to adjust the parameters in interactive way but also lets us understand the effects of different parameters and optimizes the dynamic properties. the theory of plc control in dshp is discussed after advanced understanding of the system movements. hardware design and general regulation are given on the base of siemens company products s7 - 200 plc

    本文根據大量的國內外文獻，對研配液壓機的工作原理及設計結構進行了簡介；對位置同步的控制方法進行了比較分析，提出比例閥和伺服閥復合控制的閉環結構來對非對稱雙缸進行同步控制電液比例同步控制方案；在此基礎上著重對比例閥控非對稱缸建模，最後得到位置控制系統的總體數學模型，從理論上對同步系統動態特性進行了分析，並用pid控制器進行參數整定，減小雙缸同步誤差、提高系統的動態響應性能；其中控制性能的分析藉助于matlab軟體中的simulink工具箱，由已建立的數學模型形成模擬模型，得到可視化的模擬結果，從而利於交互方式下調整參數，了解不同的參數對系統的影響，優化同步系統的動態性能；在深入了解系統的動作特性后，對plc控制研配液壓機的原理進行了探討，針對siemens公司s7 ? 200型plc給出了硬體設計的總體規劃，編制出研配液壓機動作控製程序，在編程中著重研究位移傳感器與plc的通訊、雙缸同步運行的pid控制在plc上的實現及bcd碼撥盤輸入程序的植入問題。
  10. 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。
  11. When switching the no - load overhead lines by alternating - current high - voltage circuit breaker which is a kind of daily operations in electric power system, over - voltage is probably bringed out and insulating property of the electric devices is breakdowned sometimes, especially, when occuring re - strike. the main purposes that the tests on switching line - charging current are performed in the laboratory are assessing re - strike performance of circuit - breakers. according to the test results, the design of the circuit - breaker is optimized and re - strike performance is improved

    交流高壓斷路器是電力系統中最關鍵最重要的設備之一，斷路器開合空載架空線路是電力系統中常見的操作，操作過程中通常會出現過電壓，對系統絕緣造成威脅，嚴重時會破壞系統的絕緣性能，發生事故，隨著電力系統電壓等級的提高、輸電線路不斷延長及傳輸容量的增大，由操作過電壓引起的絕緣閃絡、設備破壞事故的幾率更加突出。
  12. Maximum system voltage

    最高系統電壓
  13. Um - - the maximum value of the " highest system voltage " for which the equipment may be used

    Um一設備可承受的「最高系統電壓」的最大值。
  14. 7. ability to resist filthy : filtering devices, insulation of the electricity than from indoor climbing type not less than 2. 0cm kv as opposed to system maximum working voltage ; outdoor type not less than 2. 5cm kv filthy area to be re - statement

    7 .抗污穢能力：濾波裝置各外絕緣的爬電比距戶內型不小於2 . 0cm kv相對于系統最高工作電壓戶外型不小於2 . 5cm kv重污穢地區使用需聲明。
  15. The selection rule of the hysteresis width has been developed in order to make the thd and rms value of the output voltage to be the best with high efficiency, according to the principle of pulse density modulation

    根據脈沖密度調制技術的原理導出了使輸出電壓失真度最小、有效值最大，系統效率也較高的環寬取值公式。
  16. Introducing and analysing the rebuilding project of the low pressure lube oil system, electronic and hydraulic system, and high pressure system, showing their advantages and disadvantages, after comparing their technical index, we finally determine the rebuilding project of the governing system of unit3 in feng zhen power plant - high pressure oil syetem. the

    針對目前個別電廠採用的低壓透平油系統、電液並存系統及高壓抗燃油的純電調系統改造方案分別進行了介紹和分析，對它們的優缺點進行了闡述，通過對各種指標的比較確定了豐鎮電廠3 #機組電調系統改造的最終方案一高壓抗燃油系統純電調方案。
  17. With performance of up to 900 million floating - point operations per second ( mflops ) at a clock rate of 150 mhz, tms320c6711 is fit to tackle with the problem. this thesis made a deep research on the h. 263 standard and the tms320c6711. we propose the plan of the software and the hardware for the realization of the h. 263 protocol which include the structure of the whole program, the c code of the key algorithm of the h. 263, the c code of some subprogram, and the circuit for image processing with the tms320c6711 as the processor. furthermore, we optimize some subprogram in common use to make the coding more quickly. we encode a video sequence with the tms320c6711dsk successfully, even if the compression rate is as high as 100, video effect we get after decoding the code stream is satisfying

    首先系統地研究了h . 263協議編碼器的基本演算法，句法，碼流結構和tms320c6711dsk的原理結構以及ccs2 . 0的開發環境；在系統的軟體方面給出了總體流程圖，對于h . 263協議編碼器的某些核心演算法和子程序，給出了部分源代碼，對于dsp的各種代碼優化方法進行了討論，並且對代碼進行優化，從而在提高系統處理速度的同時減少代碼大小和內存需求量；硬體方面以tms320c6711為核心處理器，提出了基於tms320c6711的圖像處理平臺的硬體實現方案，並給出了原理電路圖；最後在tms320c6711dsk上成功對視頻數據進行高壓縮比（ 100倍以上）的編碼，對回傳的結果解碼后得到了令人滿意的效果。
  18. In order to realize automatic and intelligent control better ; and to enhance the effect of electric power system ' s reactive power compensation and the economy of power network ; and to minimizing the times of checking in or out capacitor banks makes reactive power adjustment optimum, fuzzy control technology and genetic algorithm for reactive power optimization are proposed. we also mention how to make voltage and reactive power control optimum in the integrated automatization system of substation

    為了充分實現控制的自動化與智能化，進一步提高系統無功補償的效果和電網運行的經濟性，保證無功調節達到最佳的狀態而投切的電容器次數最少，還引入了模糊控制技術和遺傳演算法進行無功優化，探討了如何在變電站綜合自動化系統中實現電壓無功的最優控制。
  19. In order to solve the problem of voltage regulating, the control strategy of select harmonics elimination pulse width modulation ( shepwm ) was introduced. at the same time it was combined with optimum spwm, the range of voltage regulating was expended and the dc utilizable efficiency was improved

    為解決變換器調壓問題，對基於選擇諧波消除的shepwm控制方案進行了研究，並將此種控制與開關點預置最優spwm相結合，進一步擴展系統調壓范圍，提高直流電壓利用率。
  20. With the modern electric system becoming more complicated and voltage grade keeping elevated, the probability that system comes forth some problems is increasing. therefore, it is necessary for us to take adequate measures to ensure the security of the system and minimize the loss when the system fails to function. relay protection technique is the most important one among diversified safety precautions

    隨著現代電力系統日趨復雜，電壓等級的升高，系統出現問題的可能性比以往有所增加，因此，必須有足夠的措施保障系統的安全，將電力系統出現故障時所造成的損失減到最低，繼電保護技術是各種安全措施中最為重要的一種。
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