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- For this reason, it has the absolute advantage to adopt the technique of variable speed constant frequency (VSCF). 为了提高风能的利用率,变速恒频(VSCF)风力发电技术有其绝对的优越性。
- The VSCF (Variable Speed Constant Frequency) wind power generation is a new technology. 风速仿真是风力发电研究的重要手段之一。
- The decoupled control of active power and reactive power is a key technology of variable speed constant frequency (VSCF) wind energy generation system. 双馈发电机的有功和无功功率的解耦控制是变速恒频(VSCF)风力发电系统的关键技术。
- All kinds of circuit topology and power modulation technology for variable speed constant frequency(VSCF)wind power generator system are introduced. 简单介绍了变速恒频风力发电系统中出现的一些常用拓扑结构及功率调节技术。
- External load has great effect on output rotational speed.Adjusting applied field and using different ERF are effective ways to keep output rotational speed constant. 外加负载对输出转速影响较大，为了保证恒定的输出转速，可通过调节外加场强和选择适当的ERF实现。
- The shaft-driven generator system using mechnical means to keepthe rotary speed constant is a new equipment for saving of energy,andis being adopted extensively by modern ships. 机械式恒频轴带发电机是一种新颖的节能装置,正日益广泛地被新设计的现代化船舶所采用。
- By considering the change of seed in the process of precipitation, the precipitation speed constant k was got and it can conform to the Arrhenius formula better. 在分解过程中晶种的瞬时比表面积变化很小，可以忽略瞬时比表面积变化的影响。
- Abstract: Wind power generation system should adopt the variable speed constant frequency (VSCF) control strategy in order to maximize the use of wind energy. 中文摘要: 为了最大限度地利用风能，风力发电系统应采用变速恒频控制策略。
- When the concentration of o-cresol in a wider range, reaction fitted the fist-order kinetics and the reaction speed constant decreases with increasing concentration. 在较宽的浓度范围内,邻甲酚的反应服从一级动力学反应方程,随着浓度的增大,反应速率常数不断降低。
- Hydrogenerator system with doubly fed generators (DFG) have superior performances such as good stability, ensuring variable speed constant frequency (VSCF), regulating active power and reactive power independently, and absorbing lag reactive power deeply. 变速恒频水轮发电系统的出现改变了这一局面,这种发电机具有良好的稳定性及变速恒频发电能力、独立的有功与无功调节能力和较强的进相运行能力。
- 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 wind turbine is a highly nonlinear system.This paper discusses the control concept of variable speed constant frequency (VSCF) wind turbines and their performances above rated wind speed. 由于风能的随机性及气动效应的影响，变速恒频风力发电系统具有强非线性，难于实现高精度控制，输出电能质量较差。
- WU Xiaojie,CHAI Jianyun,WANG Xiangheng.Overview of AC excitation for variable speed constant frequency doble fed wind power generator systems.Automation of Electric Power Systems,2004,28(23):92-96. [9]伍小杰;柴建云;王祥珩.;变速恒频双馈风力发电系统交流励磁综述
- Doubly-fed induction generator (DFIG) is an attractive and booming approach that provides the ability of variable speed constant frequency wind power generation with low cost and high efficiency. 而变速恒频双馈风力发电技术以其成本低、高效率等特点成为当今风力发电技术中的主流。
- The speed of light is an important constant. 光速是一个重要的常数。
- The signals go to and fro at a very high but almost constant speed. 那些信号用非常快但几乎不变的速度来回传送。
- No horse has a speed comparable to that of his. 没有一匹马的速度能比得上他的马。
- In this paper. we assume that the reaction of ROH and EO was obedient to the ionic reaction mechanism of the same speed constants to the defferent catalysts. 求文假设在不同碱催化剂存在下的脂肪醇聚氧乙烯醚合成反应皆按等速率离子反应机理进行。
- That's all there is to make a speed dial call. 在那里全部要进行快速拨号呼叫。
- The great virtue of air travel is speed. 乘飞机旅行的最大优点是速度快。
