variable pitch turbine 中文意思是什麼
variable pitch turbine
解釋
可調槳葉角度的水輪機-
The main task of the paper is to control a major variable pitch wind turbine generator with intelligent controller so as to make it run well
本論文是用智能控制器來實現大型變槳距風力發電機的電控系統。 -
Based on 1mw wind turbine design, this paper offers one reasonable variable - pitch structure, which can response quickly and operate conveniently
本文按照1mw風電機組總體方案要求，設計出一種結構合理，反應靈敏、操作方便的變槳距機構。 -
The control parameters influenced the loads of the stall wind turbine small. but it will be bigger to the variable pitch wind turbine and the variable speed wind turbine
對于bladedforwindows軟體，定槳距失速調節型風力發電機組控制參數的輸入量比較少，對機組載荷的影響也比較小。 -
Based on research of wind turbine aerodynamic characteristics, this paper analyzed various control methods for a pitch - controlled system of variable - speed and constant - frequency wind turbine at a wind velocity range higher or lower its speed rating respectively
摘要在風力機空氣動力學特性分析的基礎上，討論了變速恆頻風力機組變槳距機構在低於額定風速階段和高於額定風速階段的不同控制策略。 -
Compared with fix - pitch wind turbine, the variable - pitch wind turbine has the virtue : stable output power over rated power, high wind power coefficient, holding rated power at high wind speed, good starting and shut - off etc.
變槳距風力發電機組與定槳距風力發電機組相比，在額定功率點以上輸出功率平穩、具有較高的風能利用系數、能夠確保高風速段的額定功率、起動性能與制動性能好等特點。 -
The paper studies the pitch - regulated structure and stand - alone control system about mw wind turbine group. the background of the paper is " mw variable - speed constant - frequency wind turbine group ( no. 2001aa512022 ) ", which is supported by national 863 plan
本文以國家863計劃《兆瓦級變速恆頻風電機組》 （課題編號： 2001aa512022 ）為背景，主要研究了兆瓦級風電機組的變槳距機構及其單機控制系統。 -
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電機組的特點，重點分析了基於雙饋發電機的變速恆頻發電系統及槳葉節距角控制系統。 -
The result of computer and analysis based on blade elements theory shows us that we can regulate the rotate speed of wind turbine rotor by changing set angle and pitch h. variable - pitch system is the key component of the whole wind turbine, which can assure safely pitch - control and brake
本文利用葉素理論，經計算分析得出：通過改變風力機安裝角可以改變槳距h ，從而改變風力機的轉速。變距機構是變槳距控制型風電機組實現變距控制和安全剎車的關鍵機構之一，它的運動由平動和轉動兩部分組成。 -
At first an analysis of the basic principles of the vertical - axis variable - pitch turbine is given including two methods to calculate the induced velocity. one is the three different streamtube - methods which are single - disk single - streamtube ( sdst ), double - disk single - streamtube ( ddst ) and multi - streamtube ( mtt ) method based on the momentum theory, the other is the vortex method ( vtth ) based on the potential eddy theory
一是根據動量定理的流管模型得到的求解誘導速度的單盤面?單流管方法（ sdst ） 、雙盤面?單流管（ ddst ）方法、多流管（ mtt ）方法；二是根據勢渦理論得到的求解誘導速度的的渦方法（ vtth ） 。 -
A hydrodynamic optimal method to enhance the energy conversion coefficient of the vertical - axis variable - pitch turbine is presented in this paper based on the analysis of the existing mathematical models, on the computational methods for predicting the hydrodynamic performance of turbines and on the available experimental results. by applying mathematical optimal theory, a mathematical model for optimizing the hydrodynamic attack angle of the blades of turbines is formulated and some numerical results are obtained as well
本文在總結和研究豎軸可調角直葉水輪機水動力性能計算的現有數學模型，計算方法和實驗結果的基礎上，運用最優化理論，給出了改善和提高該種水輪機能量利用率的一種優化方法，建立了數學模型，並得到了計算結果。 -
Second, the paper introduces the modeling of the major variable pitch wind turbine generator in detail and presents the simulink result of the major variable pitch wind turbine generator without controller. third, in the third chapter the paper puts forward a control tactics of the major variable pitch wind turbine generator. for comparing conveniently with the neural networks controller and the fuzzy controller that have been designed in the later chapters, this paper gives the simulink result of the major variable pitch wind turbine generator with pid controller in brief
首先，簡單地介紹了控制理論、神經網路和模糊控制的發展概況以及風力發電機的現狀；其次，詳細地介紹了大型變槳距風力發電機的模型的建立，並給出了風力發電機系統的開環模擬結果；接著，在第三章提出了大型變槳距風力發電機的控制策略，為了便於和後面設計出的神經網路控制器和模糊控制器相比較，本論文還簡要地作出了pid控制器的模擬結果；然後，分別設計出了神經網路控制器和模糊控制器並模擬出了令人滿意的結果。 -
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，將發電機發出的變頻變幅值交流電轉化為可用的恆定頻率的交流電，通過pwm調治能使其輸出功率因數為一，並且該控制系統功率因數為可調，能在特殊情況下同電網交換一定的無功功率，並通過對變流器的控制實現了最大風能俘獲的功能。最後採用matlab / simulink進行了模擬，取得了良好的模擬效果。在風力發電系統中，採用先進的最大功率俘獲演算法，能有效的從風中獲得最大的能量。 -
With the continuous enlargement in capacity of a wind - power generator, the efficiency improvement of electric power generation had been become more and more important. the variable - speed constant - frequency ( vscf ) power generation, which is served to reach maximum wind - energy capturing and utilization for a variable blade - pitch wind - turbine, is the studying hot - spot of the wind - power generation technique at present
隨著風力機組單機容量的不斷增大，提高發電效率已是風力發電研究的重要內容。採用變槳距風力機實現最大風能捕獲和利用的變速恆頻發電已成為當前風電技術的研究熱點。 -
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。
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