variable speed constant frequency造句
例句与造句
- Variable speed constant frequency
变速恒频 - Closed - loop control of matrix converter used for variable speed constant frequency supply system
矩阵变换器在永磁交流伺服系统中的应用研究 - Sliding mode control during variable speed constant frequency doubly - fed wind generator no - load connecting electric grid
变速恒频双馈风力发电机空载并网滑模控制 - 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
变速恒频电源系统是通过电子变换器将发电机输出的变频交流电转换成为飞机用电设备所需的恒频交流电。 - 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
在简述风力机特性的基础上，介绍了定桨距和变桨距发电机组的特点，重点分析了基于双馈发电机的变速恒频发电系统及桨叶节距角控制系统。 - It's difficult to find variable speed constant frequency in a sentence. 用variable speed constant frequency造句挺难的
- 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
实现变速恒频发电的方法众多,本文研究的是较常用的一种方案。该方案采用直驱永磁风力发电机通过变频器直接连接到电网。永磁风力发电机并网逆变器是并网发电系统的核心部分,其主要功能是将经过整流、斩波升压后的直流电逆变成三相交流电,并送入电网,实现并网。 - 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
当今对可再生能源的开发利用中,风能由于其突出的优点而成为研究的热点,风力发电是我国能源和电力可持续发展战略的最现实选择。目前各种风力发电技术的发展方兴未艾,而其中变速恒频风力发电技术因其高效性和实用性正受到越来越多的重视。 - 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
正是基于上述两个出发点，本文设计了一台基于8xc196mc单片机的2 . 8kw变速恒频双馈风能发电控制系统。主电路中变流器的设计可使该系统能工作于亚同步速、同步速及超同步速三种运行状态，并具有能量双向流动的特点。 - 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
逆变器在飞机变速恒频电源、 ups以及其他电源中具有很广泛的用途，随着pwm控制策略以及数字信号处理技术的不断发展，数字控制在逆变器控制方案中的价值也日益凸现。 - 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
本文以沈阳工业大学风能研究所正在进行的国家863项目“兆瓦级变速恒频风电机组”为基础，对兆瓦级风力发电机的液压系统部分进行了设计计算，并通过autocad的内嵌语言autolisp ，实现了兆瓦级风力机液压系统中变距液压缸部分的参数化自动绘图。 - 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
结合“变速恒频电源数字控制技术研究”科研项目，对基于dsp的全数字变换器平台做出了系统实验验证，由于数字控制的精确性、快速性、灵活性，最终采用全数字控制的变速恒频电源的稳态性能、动态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
建立了永磁电机和变流器的数学模型,针对双pwm变频器的特点提出了三种控制策略对变流器进行控制,通过变流器交-直-交的变换,将发电机发出的变频变幅值交流电转化为可用的恒定频率的交流电,通过pwm调治能使其输出功率因数为一,并且该控制系统功率因数为可调,能在特殊情况下同电网交换一定的无功功率,并通过对变流器的控制实现了最大风能俘获的功能。最后采用matlab / simulink进行了仿真,取得了良好的仿真效果。在风力发电系统中,采用先进的最大功率俘获算法,能有效的从风中获得最大的能量。 - 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
交流励磁发电机的基本结构与绕线式异步电机相同，其定子侧接电网，转子上采用三相对称分布的励磁绕组，由变频器提供对称交流电励磁，且励磁电压的幅值大小、频率、相位、相序都可根据要求加以控制，从而可以控制发电机励磁磁场大小、相对于转子的位置和电机的转速，使得交流励磁发电机具有良好的稳定性及转速适应能力、独立的有功与无功调节能力和较强的进相运行能力，性能超越传统同步发电机和感应发电机，因而有着广阔的应用前景。