暫態過度 的英文怎麼說

中文拼音 [zhàntàiguò]
暫態過度 英文
transient overshoot
  • : Ⅰ形容詞(時間短) short; momentary Ⅱ副詞(暫時) temporarily; for the moment; for the time being
  • : 名詞1. (形狀; 狀態) form; condition; appearance 2. [物理學] (物質結構的狀態或階段) state 3. [語言學] (一種語法范疇) voice
  • : 過Ⅰ動詞[口語] (超越) go beyond the limit; undue; excessiveⅡ名詞(姓氏) a surname
  • : 度動詞[書面語] (推測; 估計) surmise; estimate
  • 過度 : excessive; over; undue; ana-; hyper-
  1. As a new financing instrument, since convertible bond came to the capital market of china, becase of its speclation and investment, it was accepted by government and companies and investors convertible bond may play an important role in broadening enterprises ' financing channels, enrich the variety of investing instruments and make our security market prosperous. csrc has issued the interrelated rules for public firms issue the convertible bonds. until the end of 2001, it has 55 firms plan to issue the the convertible bonds. but by end of 2002 only 5 firms issued the convertible bonds because of investor ' worry. but in 2003, the management strengthens the security market such as some public firms just to " fold money ", the convertible bonds become the most invest tools for the public firms refinance. only if the behavior of issuing convertible bonds is normalized our security market can tend towards a mature way, social capital can be optimized, and the public firms can also develop in an ample area. this paper base on the character of the convertible bonds

    國務院證券委員會在1997年3月25日頒發了《可轉換公司債券行管理辦法》 ,又於2001年4月26日頒發了《上市公司發行可轉換公司債券實施辦法》關于可轉換債券的規定和條例,對上市公司發行可轉換公司債券的要求條件比配股、增發更為寬松,截止到2001年4月,有200多家上市公司夠發行可轉換債券資格,到2001年底有55家公司計劃發行可轉換債券,但受到一些上市公司通配股、增發等「圈錢」的影響,投資者對上市公司通發行可轉換債券再融資是不得不持審慎, 2002年全年僅5家公司實施了可轉換債券,共籌集資金41 . 5億元人民幣,從總體發行情況看,發行規模越來越小,利率越來越高,投資者認可程越來越低,發行和交易狀況每況愈下。
  2. By introducing the regulable parameter e, the transient quality of the system is improved. by regulating the parameter e, the control precision and the energy consume are compromised logically. the simulation result proves the va

    由於可調參數的引入,改善了系統跟蹤的性能,通適當選取該參數,使系統的控制精與能量消耗得到合理折衷;將所設計的控制器進行實例驗證,模擬結果表明了控制器的有效性。
  3. 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 、電勢e ' q 、有功功率pe 、機械功率pm 、汽門開、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。
  4. When this fault is cutted off and the breaker is reclosed, this scheme ca n ' t start by mistake. the availability of this scheme is proved with matlab test. the single phase high - impedance grounding fault is settled properly

    Matlab模擬分析證明了該方案耐受渡電阻的能力強,在故障切除和重合閘時不會因出現的信號而誤啟動,不受系統振蕩、頻率偏差的影響,克服了常規保護靈敏不足的缺點,較好地解決了單相高阻接地故障的難題。
  5. Plenty of experiments show the real, imaginary, module and angle of wavelet transform can accurately choose the fault line and precisely identify the high frequency of transient signals

    大量的實驗,表明利用小波變換后的實部、虛部、模值以及相角可以準確的給出故障線路並高精的提取故障信號的高頻分量。
  6. The thesis introduces the definition of transient current and it ' s energy. the tranvelling wave can be affected by power system equipment, it ' s effect is analysed with energy change of transient current at high frequency band

    討論分析了電力設備對行波的影響。提出了通電流高頻分量的能量及其能量比值變化情況定量分析變電站設備對電流高頻分量的影響程的方法。
  7. In this paper we establish math modal of transient temperature and stress fields of the turbine " rotor with finite element method, develop rotor ' s thermal status online monitor system by distribute computer and visual software, realize online show and analyst of temperature and stress fields when all kinds of transient condition, and finally provide reasonable and optimized operation suggestions, improve safety and economic level of unit sets " operation

    本文採用有限元建立汽輪機轉子的場、應力場的數學模型,藉助計算機分散式計算、可視化等技術開發轉子的熱狀在線監測系統,實現汽輪機在各種渡工況下轉子溫場、應力場的在線顯示與分析,提供合理的操作建議,提高機組運行的安全性與經濟性。
  8. On the basis of extensive reading and research of theory of the wavelet, it is presented a practical method based on odd theory of wavelet analysis to remove the white noises from transient fault current traveling waves of high voltage transmission line via multi - size analysis of wavelet

    本文在廣泛閱讀和深入研究小波理論的基礎上,論文提出了一種基於小波分析的奇異性理論對通小波多尺變換的高壓輸電線路故障電流行波信號進行白噪聲濾除的實用方法。
  9. Through small signal stability analysis and transient stability simulation in a typical hvdc system ( epri 36 ), the results show that some characters of closed - loop system on the basis of associated feedback control, such as angle stability, voltage accuracy and small signal stability, are better than those of avr + pss

    一個典型交直流電力系統( epri - 36系統)的小干擾穩定計算和模擬表明,關聯測量分散勵磁控制下的閉環系統在功角穩定性、電壓調節精以及小干擾穩定性方面均優于常規勵磁附加pss 。
  10. Firstly, a new iterative version of prony analysis is proposed, which has better performance than the conventional one. then the pattern recognition of power grid ' s transient response and identification of reduced order linear model using prony method are discussed in detail

    提出通迭代演算法以提高prony分析的精,然後詳細討論了該方法在電網響應的模式識別,電網降階線性模型等值等方面的應用。
  11. At last, the formation and development of transient saturated zone, and the distribution and variation of transient water pressure in the process of infiltration under different rainfall degrees are described by an example

    最後,通算例分析了不同降雨強下入滲程中飽和區的形成、發展以及水壓力分佈、變化。
  12. By analyzing of the potentiostatic transients, the diffusion coefficient d of the depositing nickel ions and saturated nucleus number density nsat were estimated, the effects of applied potential on nucleation and growth ware also discussed

    分析恆電位曲線,求出鎳離子的擴散系數d ,以及不同外加電位下的飽和晶核數密n _ ( sat ) ,探討了外加電位對成核作用的影響。
  13. 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;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? ?投切控制晶閘管零觸發,避免了電容器投切時的電流沖擊;穩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,解決了投切時的電流沖擊和穩時可靠運行的難題;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。
  14. The surplus transient energy, ( ste ), produced during the fault period is used as the quantity index to evaluate the damage degree of generator stability. the effect of gahc to the generator stability was analyzed in single machine system and multi - machine system. the results of analysis show that ste could be reduced by the gahc, the ste decrease of controlled generator would be helpful to reduce the coupled disturbance transient energy of other generators in multi - machine system

    以發電機在故障期間積累的能量作為發電機穩定性受到危害程的定量評價指標,在單機無窮大系統和多機系統中對gahc提高發電機穩定性的作用機理進行了理論分析,分析結果表明: gahc能夠加速被控機組能量的衰減,在多機系統中被控發電機能量的衰減將減少與之關聯的其它發電機受到的耦合勢能的擾動量,也就說明在多機系統中gahc在提高本地機組穩定性的同時不會對其它發電機的穩定性產生危害作用。
  15. One is constant impedance modeling, the other is complicated load modeling. based on the time domain simulation, the sensitivity of stability margin with respect to node active and reactive power for the system with complicated load modeling is derived

    結合時域模擬,本文提出了具有綜合負荷模擬的程中發電機加速面積、減速面積、減速功率(穩定裕)對網路節點有功、無功及變壓器變比的靈敏分析方法。
  16. Since that the choosing line hardware for the neutral ungrounded system has just passed part of the dynamic simulative test, matlab software was chosen to do a lot of simulative tests on single phase - to - grounding fault. and the simulative sampling ratio is almost the same as the hardware ' s. because there is a low wave filter in the hardware, i choose the db15 wave - let to carry out the multidimensional decomposition on the sample by the method of one dimension discrete wavelet in order to obtain low frequency signal including the high frequency transient information on single phase - to - grounding fault

    鑒于實驗室已有的小電流接地系統選線硬體的研製只通了實驗室里的動模試驗,故選用matlab軟體對小電流接地系統進行大量的單相接地故障模擬試驗,模擬的采樣率和硬體基本一致,由於硬體中帶有低通濾波器,故在進行采樣數據的morlet小波分析時先採用db15小波對采樣進行一維離散小波的多尺分解,使得分解得到的低頻信號剛好包括了小電流接地系統單相接地故障時的高頻信息,然後對這一信息再繼續進行小波演算法分析,分析結論表明利用變換后的實部、虛部和模值能夠較準確的實現單相接地故障時的故障選線和高頻分量的提取。
  17. Both complicated and simple model of transient stability analysis are integrated in the software, applying the model of each component to different degree of precision respectively. joined with the power system diagram editor, the transient stability analysis can be carried out in a graphical way. some auxiliary models are introduced, such as the classes of fault information and swing curves, etc. these models turn out to be essential to make the procedure of transient stability simulation vivid and intuitionistic, with the swing curves of different variables during the transient period being showed and printed conveniently

    針對電力系統各元件模型的不同精確程,採用成熟的數值解法實現了復雜模型的穩定計算和簡化模型的穩定計算,並與已有的面向對象的電力系統圖編輯器進行了很好的連接,實現了穩定分析的圖形化;實現了故障信息類、變化曲線類等輔助對象,使得整個穩定模擬計算的程形象直觀,且能對程中各量的變化曲線進行方便地顯示和列印輸出。
  18. It is also wavelet transformation that transient wave formed in the charged process of line, the accurate length of line can be got by using singularities and idea of fault location presented in the paper

    再者對線路剛充電的程形成的波進行小波分析,利用奇異性檢測理論及本文提出的測距方法的核心思想,得出線路的準確長
  19. According to calculation, synchronous closing can reduce the value of over - current and over - voltage in the closing transient process. the closing of capacitor is taken as an example to analyze movement process of synchronous closing. it also analyzes the impact of pre - strike characteristic, environmental temperature and control voltage on synchronous closing

    計算分析了同步關合技術對合閘程中電流和電壓的抑制作用,並以電容器的同步關合為例,分析了同步關合的動作程及預擊穿特性、環境溫,控制電壓等外界因素對同步關合技術的影響。
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