有功電壓降 的英文怎麼說

中文拼音 [yǒugōngdiànyājiàng]
有功電壓降 英文
ohmic drop
  • 有 : 有副詞[書面語] （表示整數之外再加零數）: 30 有 5 thirty-five; 10 有 5年 fifteen years
  • 功 : 名詞1 （功勞） exploit; merit; meritorious service [deed]: 戰功 military exploits; 立功 render me...
  • 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。
  • 降 : 降動詞1. （投降） surrender; capitulate 2. （降伏） subdue; vanquish; tame
  • 有功 : have rendered great service; have performed meritorious service
  • 電壓 : voltage; electric tension; electric voltage
  1. Finally, because high - speed power solenoid valve is one of the most important executive parts in the electronic control diesel engine and the performances of diesel engine are strongly related to the solenoid valve, the response performance of the solenoid valve is investigated. the response performance of the solenoid is influenced by many factors, such as driving voltage, electric driving unit etc. in order to have high excitation voltage and in low maintaining voltage, a high - low voltage electric driving unit is designed, and in order to make the solenoid valve close more rapidly, an active free - wheeling circuit and a bootstrapping circuit are designed in the electric driving unit, too. in the high - low electric driving unit, high voltage and low voltage are supplied by the dc - dc device and by the accumulator respectively

    高速強力電磁閥的響應性能除了與閥本身的結構和材料有關外，與驅動電壓、驅動電路的設計密切相關，本文通過分析，首先開發出一種高低壓驅動電路，高壓電源是山升壓式dc - dc原理獲取的，低壓由蓄電池本身提供，實現高壓強激和低壓維持的功能，電路中採用有源續流電柴汕機中卜軌知介系統的設訓及其七川j敝略的叭究路進行續流，加誣了電磁閥的關閉速度；採用自舉吐路，降低了場效應管對驅動電壓的要求。
  2. Reactive power optimization is of great impotae to voltage quality twee, powerloss minimization and thus security and economic operation of power system

    電力系統無功優化對保證電壓質量、降低運行損耗，實現電網的安全經濟運行具有重要意義。
  3. Firstly, the thesis briefly reviews the history of voltage and reactive power control technology, focusing on the defects of the equipment in use. then, with the theoretical analysis and the discussion on voltage and the characteristic of power system as well as the basic principle of voltage and reactive power control, the thesis makes a research on the character of voltage and reactive power control and interprets the controlling regularity of substation. in addition, with the consideration of the changes of transformer tips and the combined influence of capacity groups and reactive power and voltage, the thesis makes adjustment suggestion to the different operating - zones of voltage and reactive power

    本文從降低網損和提高變電站自動化水平著眼，對變電站電壓無功控制應用方面的問題進行了研究，本文首先簡要回顧電壓無功控制的發展概況，著重指出了現有電壓無功控制裝置的缺陷；通過理論分析，在討論電力系統電壓、無功調節特點以及電壓無功總體控制原則的基礎上討論了變電站電壓、無功控制特性以及控制原理，給出了變電站電壓無功的控制規律；考慮了變壓器分接頭的變化及電容器組的投切對無功和電壓的綜合影響，針對電壓、無功的各種運行控制區域給出了相應調節策略。
  4. The emulational calculating theories of traction power supply system ' s operating charts combine with actual things of engineering design at present in chapter three, to set up traction web current distributing mathematical model, integral distributing mathematical model, locomotive distribution and obtaining current model at every moment, and on which making use of mathematical planning methods to set up mathematical models is based at every moment in every instance interval of the railroads. for instance, instantaneous current, instantaneous voltage descent and effective current, main changing capacity and so on, in addition, there are the minimum power shortage model, the optimal transformer substation location, the least engineering expenditure, the optimal mathematical model of traction power supply system. optimize design ' s algorithm of traction power supply system is introduced in detail in chapter four, where programming idea and realizing method of the computer software are given an explanation

    本研究主要進行了以下工作：結合牽引供電系統運行圖的模擬原理和現行工程設計的實際情況，建立了牽引網電流分佈、積分分佈、任一時刻機車分佈和取流的數學模型；應用數學規劃方法建立了任一距離區間、任一時刻的瞬時電流、瞬時電壓降數學模型和有效電流、主變容量和主變壓降、最小功率損失、最佳變電所容量、最佳變電所位置、最少工程費用、最少運營維護費用和牽引供電系統方案最優等方面的數學模型；闡明了牽引供電系統優化設計的演算法和計算機軟體編程思想及實現方法；進行了工程實例計算；最後，對牽引供電系統優化設計技術應用進行了總結。
  5. 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。
  6. They both have the function to reduce the active power losses and improve nodes " voltage level

    這兩者都有降低網路有功損耗和提高網路節點電壓的功能。
  7. The reactive power optimization of a radial distribution system can efficiently minimize the real power losses and improve voltage level of it, so that the yearly running charge will be reduced and the quality of power energy can be increased

    配電網無功優化可以有效地降低網路有功損耗，提高系統的電壓合格率，從而降低網路運行費用，提高供電質量。
  8. Capacitors dispatch of distribution system is an efficient method to network loss reduction and voltage improvement in the distribution system operation. it is an important component of distribution automation system ( das ). the thesis mainly discusses reactive optimal control of distribution system

    首先，研究了配電網無功優化控制的基本理論，討論了配電網無功優化控制對電壓和有功損耗的影響，提出配電饋線電容器優化控制對進一步降低配電網的有功損耗效果顯著。
  9. The chip is mainly applied to the portable electronic products with the following features : 2. 7v to 5. 5v input voltage range ; the 1mhz fixed frequency ; - 40 to + 85 operating temperature ; two digital inputs control on / off and select amongst three levels of brightness ; thermal shutdown and under voltage shutdown protection, low 0. 1 a shutdown current ; soft - start limits inrush current

    該晶元主要應用於便攜式電子產品，其輸入電壓范圍為2 . 7 5 . 5v ，工作頻率為固定的1mhz ，可大幅度降低輸入紋波和emi輻射，工作溫度范圍為- 40 + 85 ，可使用外部使能控制信號調節led亮度及控制晶元關斷與否，具有過溫保護和輸入欠壓關斷保護功能，完全關斷模式下關斷電流可低至0 . 1 a ，具有軟啟動功能以限制啟動時的浪涌電流。
  10. The result shows that, when the full - bridge power converter is joined with boost / buck dc chopper in parallel, it can serve a dc voltage of over 340v and a power of 800w, meanwhile, as output voltage of the fuel cells changes due to loadings, the sliding - mode controller can cause more rapid responses and robustness to the dc bus voltage source

    實驗結果顯示，本論文之全橋式功率轉換器與升壓/降壓直流截波器並聯供電時，輸出電壓可達340v以上，輸出功率約為800w ，同時，當燃料電池之輸出電壓因負載而改變時，本論文所提出之滑動模式控制器能使直流鏈電壓具有較快速的響應及強健性。
  11. The electric power harmonic comprehensive control system with low cast and high security is applied in this article. it adopts that sourced compensation links with non - sourced compensation herewhich the former is realized by high frequency pwm control technology and the latter is carried out by crystal switch formed by non - flow and over - voltage. it can realize stepless modulation with imaginary power, mightiness compensation of harmonic and negative electricity, and circuitry consumption debasing are achieved

    提出採用有源補償與無源補償相結合的電力諧波綜合治理技術及裝置，無源部分採用無涌流和過電壓的晶閘管控制電容器技術實現，有源部分採用高頻pwm控制技術實現，成本低、可靠性高、可實現無功功率的無級調節、強力補償諧波電流和負序電流，降低線路損耗。
  12. In order to ensure the whole system operate economically, power department equip transformer with onload tap changer and shunt capacitors for most distribution substations, according to the operating condition, adjusting the position of transformer taps and capacitors can control the variation of voltage and reactive power exchanger of distribution substations and power system in certain extent

    為確保整個系統運行經濟性，降低網損，電力部門在大多數變電站配置了有載調壓變壓器和並聯補償電容器組，根據運行情況適當調節變壓器分接頭的位置和投切並聯補償電容器組，可以降低電壓變化和變電站與系統的無功交換控制在一定的范圍內，確保供電質量和電網運行的經濟性。
  13. Reactive power and voltage control in the distribution systems is very important. it makes the running of the systems more safe and stable and economical. it can also decrease the real power loss and improve the voltage

    在配電系統中進行無功電壓控制能夠有效地降低有功功率損耗、改善電壓水平，對系統的安全穩定經濟運行具有重要意義。
  14. ( 1 ) cfrc can effectively reduce the driving voltage required by catholic protection because of its good electric conductivity ; ( 2 ) applying cement - based pn - junctions on the prevention of reinforcement corrosion. in the interface of p - type region and n - type region of pn junctions a self - built electric field will be formed, and its direction is from n - type region to p - type region

    由於cfrc具有良好的導電能力，利用cfrc進行陰極防護，能有效的降低陰極防護驅動電壓；應用水泥基pn結的自建電場進行鋼筋銹蝕防護，能在不降低結構性能的基礎上提高鋼筋的電子逸出功，使鋼筋中的電子不易逸出，達到鋼筋銹蝕防護的目的。
  15. The traditional bandgap reference circuit was improved in the design, which includes the applying of self - bias structure and cascode structure, output of the opamp was used as self - bias voltage, saving bias circuit, and then it was helpful to get low power consumption. through using poly resistance of high value with low temperature coefficient, we reduced the influnce to circuit, if power supply did not change, we must decrease operating current to decrease power consumption, and increasing value of resistor could decrease the operating current efficiently. poly resistance of high value had large value of squared resistor, so we could save layout area

    對傳統帶隙基準電路進行了改進設計，採用自偏置結構和鏡像電流鏡結構，利用運放的輸出電壓作為運放的偏置電壓，節省了偏置電路，降低了功耗;使用低溫度系數的多晶硅高值電阻，降低了電阻溫漂對電路的影響;在電源電壓不變的情況下，為了減小功耗就必須減小工作電流，而增大電阻的阻值能有效地減小工作電流，多晶硅高值電阻的方塊電阻很大，可以節省版圖面積。
  16. For saving driver ics ' power consumption and cost, this research proposes a novel display pixel design with integrated charge pump circuits. the proposed display pixel design can supply driving voltage more than double the input voltage to display pixels. there are two advantages for this developed novel pixel design. first, the power consumption of the panels with the proposed novel pixels can be reduced due to the lower voltage on data lines. second, the high voltage driver ics are not necessary, such that the cost and power consumption of the corresponding driving systems can be diminished. from the simulation results, the pixel voltage indeed could raise to more than double input voltage by this proposed design. in addition, the pixels with charge pump circuits also retrench about half power consumption than the conventional display pixels

    為了節省面板電路驅動晶元的功率損耗以及製作成本，本研究提出一種新的像素電路設計，而在設計中將會融合電荷泵電路.利用這種電路設計的像素可有效地將像素電極上的驅動電壓提高到輸入電壓的2 3倍以上.此像素電路設計具有兩個優勢:第一，可以有效降低顯示面板的像素功率損耗;第二，不需高電壓的面板電路驅動晶元，因此可節省晶元的成本及功率損耗.由模擬結果可知，像素電極上的驅動電壓確實可由此像素電路設計而提高到輸入電壓的2 3倍以上;而像素的功率損耗也可有效地降低，約為傳統像素的1 / 2
  17. The purpose : high voltage parallel capacitor is used for power system of power frequency above 1kv to increase the power factor of system, improve the quality of voltage, reduce the loss of line

    產品用途：高壓並聯電容器應用於1kv以上的工頻電力系統中，有來提高系統的功率因數，改善電壓質量，降低線路損耗
  18. The practical application results show that with the improved genetic algorithm the action of control equipments is rational, the times of disperse equipment action are less, the voltage qualification rate can be effectively improved and the network loss is reduced and this application is successful

    實際應用表明，該演算法實用性強，控制設備動作合理，離散設備動作次數少，能有效地提高電網的電壓合格率和降低電網損耗，在福建省電網中得到了成功的應用。
  19. Compare to the operation under the dcm mode, the power switches of the inverter under the ccm mode has lower peak current and rms current, so the efficiency can be improved. as the synchronous rectification strategy can reduce the conduction losses of the rectifier, and also due to the zvs realization of all synchronous rectifiers, the

    採用非互補導通控制，在ccm模式下由於功率管電流峰值和有效值的減小，逆變器變換效率較dcm模式下有所提高;另外， ccm模式下，反激逆變器採用同步整流控制，減小了整流二極體的導通壓降，並且電路中同步整流管可實現零電壓開通。
  20. In the power transmission system, reactive capacity and active power is closely related to each other, at feeding power load required active power and reactive capacity. if a mount of reactive capacity could be supplied by far location but no local station, a great deal of reactive capacity and active power would be wasted, and its voltage be descended

    在電力傳輸系統中，無功功率和有功功率是密切相關的，在輸送電力負荷所需要有功功率的同時必須消耗一定量的無功功率，同時輸送無功電力也需要消耗有功功率。如果大量的無功電力不能就地供應，靠長途輸運，就會產生較大的無功和有功損耗及電壓降落。
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