variable speed constant frequency造句
例句與造句
- Variable speed constant frequency
變速恒頻 - Closed - loop control of matrix converter used for variable speed constant frequency supply system
矩陣變換器在永磁交流伺服系統(tǒng)中的應用研究 - Sliding mode control during variable speed constant frequency doubly - fed wind generator no - load connecting electric grid
變速恒頻雙饋風力發(fā)電機空載并網(wǎng)滑模控制 - By use of electronic inverter , variable speed constant frequency ( vscf ) electrical generating system converts variable frequency ac power from generator to constant frequency ac power
變速恒頻電源系統(tǒng)是通過電子變換器將發(fā)電機輸出的變頻交流電轉(zhuǎn)換成為飛機用電設備所需的恒頻交流電。 - The characteristics of wind turbine generators as well as features of the fixed pitch wind turbine generator and the variable pitch wind turbine generator are presented , emphasizing on the variable speed constant frequency ( vscf ) generating system based on doubly - fed generators and on the control system for pitch angles
在簡述風力機特性的基礎上，介紹了定槳距和變槳距發(fā)電機組的特點，重點分析了基于雙饋發(fā)電機的變速恒頻發(fā)電系統(tǒng)及槳葉節(jié)距角控制系統(tǒng)。 - It's difficult to find variable speed constant frequency in a sentence. 用variable speed constant frequency造句挺難的
- 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(xiàn)變速恒頻發(fā)電的方法眾多,本文研究的是較常用的一種方案。該方案采用直驅(qū)永磁風力發(fā)電機通過變頻器直接連接到電網(wǎng)。永磁風力發(fā)電機并網(wǎng)逆變器是并網(wǎng)發(fā)電系統(tǒng)的核心部分,其主要功能是將經(jīng)過整流、斬波升壓后的直流電逆變成三相交流電,并送入電網(wǎng),實現(xiàn)并網(wǎng)。 - Recently , the renewable energy such as wind power have been strongly encouraged because of environmental problem and shortage of traditional energy sources in the near future . based on the tradional consrant speed constant frequency wind energy generation , this paper has a focus on the variable speed constant frequency wind energy convertion technonogy which using direct drive permanent magnet synchnonous generator and theory analysis and simulation are carried out in detail
當今對可再生能源的開發(fā)利用中,風能由于其突出的優(yōu)點而成為研究的熱點,風力發(fā)電是我國能源和電力可持續(xù)發(fā)展戰(zhàn)略的最現(xiàn)實選擇。目前各種風力發(fā)電技術的發(fā)展方興未艾,而其中變速恒頻風力發(fā)電技術因其高效性和實用性正受到越來越多的重視。 - Just based on the two points mentioned above , a control system of doubly - fed variable speed constant frequency ( vscf ) wind power generator based on 8xc196mc is designed in this paper , which can smoothly transform between the different operational modes from sub - synchronous speed to synchronous speed and to super - synchronous speed
正是基于上述兩個出發(fā)點，本文設計了一臺基于8xc196mc單片機的2 . 8kw變速恒頻雙饋風能發(fā)電控制系統(tǒng)。主電路中變流器的設計可使該系統(tǒng)能工作于亞同步速、同步速及超同步速三種運行狀態(tài)，并具有能量雙向流動的特點。 - Electronic inverter is widely used in variable speed constant frequency ( vscf ) electrical system , ups , and other kinds of power supplies . with the continuous development of pwm control strategy and digital signal processing technology , the method of the pwm control incline to digital control and then the pwm technique plays more and more important role on the dc - ac inverter control
逆變器在飛機變速恒頻電源、 ups以及其他電源中具有很廣泛的用途，隨著pwm控制策略以及數(shù)字信號處理技術的不斷發(fā)展，數(shù)字控制在逆變器控制方案中的價值也日益凸現(xiàn)。 - This paper is based on " mw variable speed constant frequency " . it has the design and the computation on hydraulic system of wind turbine . it realizes the automatic paint for hydraulic system by the autolisp language in autocad
本文以沈陽工業(yè)大學風能研究所正在進行的國家863項目“兆瓦級變速恒頻風電機組”為基礎，對兆瓦級風力發(fā)電機的液壓系統(tǒng)部分進行了設計計算，并通過autocad的內(nèi)嵌語言autolisp ，實現(xiàn)了兆瓦級風力機液壓系統(tǒng)中變距液壓缸部分的參數(shù)化自動繪圖。 - At last , by linking with the scientific research item of variable speed constant frequency electrical generating system under digital control , we carried out entire verification with our digital power inverter . because of the preciseness high - speed and flexibility of digital control , the steady performance and dynamic performance of the final vscf power under digital control have improved greatly
結合“變速恒頻電源數(shù)字控制技術研究”科研項目，對基于dsp的全數(shù)字變換器平臺做出了系統(tǒng)實驗驗證，由于數(shù)字控制的精確性、快速性、靈活性，最終采用全數(shù)字控制的變速恒頻電源的穩(wěn)態(tài)性能、動態(tài)性能都有很大的提高。 - First , variable speed constant frequency wind energy convertion theory is described in this paper , then presents a review on the development of wind turbines control and the main types of generator and static converters used to interface variable speed wind turbines to the electric grid . then discuss main circuit constructure and advantage of direct drive wind energy conversion system and introduce pitch - control method for wind power traction and electric power stability . simply aerodynamic characteristic of the turbine is analysised and permanent magnet synchnonous generator math model is established . to convert the variable frequency electricity into utility grid , back to back four - quadrant pwm - vsi is used and three typies of control strategy is presented to capture the maximum wind energy and transmit energy . then simulation is implemented to test the control strategy . in the following chapter a simple ac - dc - ac converter with a dc - dc boosting chopper is proposed to transmit the wind energy into electricity energy and two control strategy is presented
建立了永磁電機和變流器的數(shù)學模型,針對雙pwm變頻器的特點提出了三種控制策略對變流器進行控制,通過變流器交-直-交的變換,將發(fā)電機發(fā)出的變頻變幅值交流電轉(zhuǎn)化為可用的恒定頻率的交流電,通過pwm調(diào)治能使其輸出功率因數(shù)為一,并且該控制系統(tǒng)功率因數(shù)為可調(diào),能在特殊情況下同電網(wǎng)交換一定的無功功率,并通過對變流器的控制實現(xiàn)了最大風能俘獲的功能。最后采用matlab / simulink進行了仿真,取得了良好的仿真效果。在風力發(fā)電系統(tǒng)中,采用先進的最大功率俘獲算法,能有效的從風中獲得最大的能量。 - The stator of aceg is connected to the grid and the three symmetrical excitation windings in the rotor are fed by converter . the magnitude and frequency and phase and phase sequence of excitation voltage can be controlled , so the magnitude and position of excitation mmf as well as the speed of rotor can be controlled . therefore , acegs have superior performances by contrast with conventional synchronous generators and induction generators , such as upstanding stability , power generation of variable speed constant frequency ( vscf ) , adjusting active power and reactive power independently , and absorbing lag reactive power deeply
交流勵磁發(fā)電機的基本結構與繞線式異步電機相同，其定子側(cè)接電網(wǎng)，轉(zhuǎn)子上采用三相對稱分布的勵磁繞組，由變頻器提供對稱交流電勵磁，且勵磁電壓的幅值大小、頻率、相位、相序都可根據(jù)要求加以控制，從而可以控制發(fā)電機勵磁磁場大小、相對于轉(zhuǎn)子的位置和電機的轉(zhuǎn)速，使得交流勵磁發(fā)電機具有良好的穩(wěn)定性及轉(zhuǎn)速適應能力、獨立的有功與無功調(diào)節(jié)能力和較強的進相運行能力，性能超越傳統(tǒng)同步發(fā)電機和感應發(fā)電機，因而有著廣闊的應用前景。