直流電網 的英文怎麼說

中文拼音 [zhíliúdiànwǎng]
直流電網 英文
direct-current mains
  • 直 : Ⅰ形容詞1 （成直線的; 硬挺的） straight; stiff 2 （跟地面垂直的; 從上到下的; 從前到后的） erect; v...
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 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...
  • 網 : Ⅰ名詞1 （捕魚捉鳥的器具） net 2 （像網的東西） thing which looks like a net 3 （像網一樣的組織或...
  • 直流 : direct current （dc）; constant current; steady current; continuous current; zero frequency curre...
  • 電網 : electrified wire netting; live wire entanglement; power grid電網電源 electric network source; 電...
  1. First, passive resistance network was selected as direct current biasing network, which offered direct voltage for base through the resistance voltage divider composed of two resistances, among them the upper resistance connected from the dc to base, the lower resistance connected from the base to ground. the collector connected with dc directly

    直流偏置網路採用無源電阻網路，通過由兩個電阻組成的電阻分壓器為基極提供直流電壓，上偏電阻從電源串聯到基極，下偏電阻從基極到地，集電極直接加電。
  2. 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。
  3. Speed regulator of brushless dc electric motor based on fuzzy neural network

    基於模糊神經網路的無刷直流電動機的速度調節器
  4. Secondly, to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing. the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator. thirdly, it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow. the author constructed reliable and integrated experimental system and did a series of experimental study including no - load, cutting - in network and power generation at, below and above the synchronous speed

    論文首先分析了風機運行特性及其最佳風能利用原理，通過模擬及實驗驗證了採用直流電機的輸出特性模擬風力機的最大輸出功率曲線的可行性，並給出了模擬系統的硬體結構；然後為了實現交流勵磁發電機有功、無功功率獨立調節機理，分析了交流勵磁雙饋發電機的數學模型和在追蹤最大風能捕獲變速恆頻風力發電時必需的定子磁鏈定向矢量控制策略；針對雙饋發電機轉子能量雙向流動的要求，提出並設計了具有能量雙向流動能力的雙pwm交流勵磁用變頻器；最後為實現從理論到實踐的全面研究，研製出了一套小功率完整的雙pwm變頻器交流勵磁的雙饋風力發電機實驗系統，進行了空載、並網、同步速及上、下的發電運行等一系列的運行實驗；所完成的模擬和實驗研究均驗證了理論、模型和控制策略的正確性、可行性。
  5. The fitness of four negative electrode materials such as al, fe, zn, cd, and of six membranes materials : microfiber glass mat separator, polyethylene, polypropylene, polyvinyl chloride, vinylon, soapnated cellulose acetate, and of four current collects : carbon fiber ; nickel foam ; nickel foam sthongthened by iron wire net, punched silver grid in the super - iron alkaline batteries was comparatively studied. the influence of two storaged method ( with and without electrolyte ) and two impurities ( zno, fe ( oh ) 3 ) to the experiment cell ' s self - discharge nature was also comparatively studied. at last, the nature of discharge. structure and electrochemistry of experimental cell with k2feo4 as cathode active material prepared by three different methods : high temperature reaction, hypochlorite oxidizing and electrolysis, was comparative ly studied. we can conclude : i ) the open - circuit potential and the flat of work potential and the percent of capacity of k2feo4 till 1. 0v during the discharge at constant load of experimental cells decreased by the order of al / k2feo4, zn / k2feo4, cd / k2feo4, fe / k2feo4. as for the nature of charge - discharge cycle, cd / k2feo4 fe / k2feo4 zn / k2feo4. in water solute electrolyte, although al / k2feo4 can n ' t be used as storage battery, it have great potential as primary cell or storage cell from the aspect of its discharge capacity. discharge power

    採用組裝實驗電池、 x -射線衍射（ xrd ）和循環伏安（ cv ）的方法，從實驗電池的放電特性、充放電循環特性、自放電特性，不同高鐵酸鹽的結構特性和電化學特性幾個方面，對4種金屬負極材料（ al 、 fe 、 zn 、 cd ） 、 6種隔膜材料（復合玻璃纖維、幅射接枝聚乙烯、改性聚丙烯、聚氯乙烯、維尼綸無紡布、皂化再生纖維素） 、 4種集流體材料（泡沫鎳、以鐵網為加強層的泡沫鎳、切拉銀網、炭纖維編織網）在堿性高鐵電池中的適用性進行了比較研究；對2種雜質組分（ zno 、 fe （ oh ） _ 3 ）和2類不同貯存方式（干、濕）對實驗電池自放電特性的影響進行了比較研究；對3種方法（高溫固相反應、次氯酸鹽氧化、直流電解）所制k _ 2feo _ 4的實驗電池的放電特性、結構特性和電化學性能進行了比較研究。
  6. The principle of ac - dc - ac locomotive is that transformer transforms the high single - phase ac voltage from contact system to lower ac voltage first, then rectifier transforms this ac voltage to steady dc voltage, finally converter transforms this dc voltage to three - phase vfvv ac voltage as the voltage source for asynchronous machine

    交?直?交型電力機車系統的原理是：先將從接觸網獲得的單相交流高電壓經變壓器降壓后，再經整流器變換為平穩的直流電壓，直流電壓經逆變器變換為三相交流電壓，供給機車輪對上的牽引電機。
  7. With the electricity net automatization and the power supply equipment nobody - guard, the society put forward highly appeal about safety. realiability and stabilization. so the study of communication and intelligence dc power supply become an important task in electricity net rebuilded, now

    隨著電網自動化及供電設備無人值守的推廣，對直流電源屏的安全、可靠、穩定等性能提出了更高的要求，因此可通信智能化電源的研究和應用成為當前實現電網改造的一個重要課題。
  8. The feeder net model for distribution automation is built based on the nod information matrix and the line information matrix, and the nods represent the switches and the fault indicator in the distribution net. the method of fault locating offered by this paper called line fault probability method, which locates fault by calculating the fault probability of line in the net. this paper also provides a method called volts d. c. for restoration and offers the regulation of restoration

    採用節點、支路信息矩陣來描述配電網路，形成面向故障自動化處理的網路數據結構；提出了基於支路故障概率的故障定位演算法，並結合短路電流特性判據法來定位故障支路；在定義直流等值網的基礎上，提出了優化供電恢復的直流電壓降法；開發了配電網故障自動處理軟體系統，並用於實際配電自動化工程中。
  9. It can improve the utilize of power by fed back the power generated by motor machine to power - net, has the benefit of improving power factor, reducing the harmonious feeding back to the power - net and can enhance the performance of converters for the constant voltage of dc - link

    該裝置能夠提高電能的利用率，把由電動機產生的再生能源回饋到交流電網，並且能提高裝置的功率因數，減少對電網的諧波污染。由於pwm整流，變頻器中間直流環節的電壓能保持穩定，提高了逆變器的調速性能。
  10. Simulation of speed - adjustment system on neural network self - tuning control for brushless dc motor

    基於神經網路的無刷直流電機調速系統的模擬
  11. Valere power, headquarters in richardson, texas, usa, is a high performance organization that markets and develops advanced dc power systems for the telecommunication and enterprise market

    總部設在美國德州，致力於發展可供通信和企業網使用的先進直流電源系統。我們現在中國誠征有志之士加入我們的隊伍。
  12. Our factory is according to the needs of customer, still the production is charged and against becomes an organic whole machine, and can being charged and can be against becoming, and netting the electricity at ordinary times often can be charged to the accumulator, the net electricity has stopped afterwards use the accumulator with against becoming, makes the 12 volts direct currents change into the 220 volts alternating currents, for person production and the life brought the convenience

    我廠根據客戶的需要，還生產充電、逆變一體機，既可以充電、也可以逆變，平時網電正常時可以對電瓶充電，網電停了之後可以利用電瓶和逆變，使12伏直流電轉換成220伏交流電，為人門的生產和生活帶來了方便。
  13. Hvdc ( high voltage direct current ) has many merits, and it will take an important role in national grid

    直流輸電有很多優點，在全國聯網工程中，直流聯網將發揮不可替代的作用。
  14. The electricity is supplied by roof - mounted pv cells linked to an inverter and a dc net

    電能是由鋪設在屋頂並與變極器和直流電網相連的pv板提供。
  15. Apparatus for connection to private circuits run by certain public telecommunication operators - specification for apparatus for connection to direct current circuits

    英國通信網家用線路連接設備.第3部分:直流電路連接裝置規范
  16. Today, mw wind generators substitute 600kw generators gradually and become the popular units of international market of wind power generation. the trends of units are variable speed constant frequency and large - scale and pitch control. there are many different generators which are variable speed constant frequency generator. in this paper the unit is fully - fed magnet wind turbine generator. the magnet wind turbine generator grid - connected inverter is the key component of connected system. the main function of this component is inverting the dc to three - level volage and connecting the electric net

    實現變速恆頻發電的方法眾多，本文研究的是較常用的一種方案。該方案採用直驅永磁風力發電機通過變頻器直接連接到電網。永磁風力發電機並網逆變器是並網發電系統的核心部分，其主要功能是將經過整流、斬波升壓后的直流電逆變成三相交流電，並送入電網，實現並網。
  17. High - voltage dc ( hvdc ) power system, which has the advantages such as light weight and easiness to realizes uninterrupted power supply, has been attracted more and more attentions

    高壓直流電源系統具有電網重量輕、易實現不中斷供電等特點，有著良好的應用前景，近年來成為研究的熱點。
  18. The factors effecting on the grid - connected ripple current are analyzed deeply. the criterions of selecting inductance l and direct current voltage ud are presented

    本文對並網紋波電流的影響因素進行了深入的理論分析，給出了電感上、直流電壓u _ d的選擇依據。
  19. With the serious problem of harmonics pollution to the power system, as well as the need of high performance of ac drive application, three - phase pwm rectifiers have been as active research topic in power electronics recently, due to the virtues, such as sinusoidal input currents, unity power factor, steady output voltage, good dynamics and bin - directional energy flow

    隨著電網諧波污染問題日益嚴重和人們對高性能電力傳動技術的需要， pwm整流技術引起人們越來越多的注意。三相pwm整流器可以做到輸入電流正弦、單位功率因數、直流電壓輸出穩定，具有良好的動態性能並可實現能量的雙向流動。因此， pwm整流器成為當前電力電子領域研究的熱點課題之一。
  20. The rectifier scheme that direct current supplying with power electronic equipment is obtained by alternating current being rectified is widely applied in power electronics field. however, the rectifying circuits result in input current distortion, input power factor greatly decrease

    從電網獲取交流電經整流后為設備提供直流電是電力電子技術中應用極為廣泛的一種整流方案，然而由這種整流方案設計的電路使輸入電流產生嚴重的畸變，其諧波電流嚴重污染了電網，輸入端功率因數大大下降。
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