| 1. | Speed mode control of variable - speed constant - frequency wind energy generation system with double fed induction generator
变速恒频双馈风力发电系统的速度模式控制 |
| 2. | Variable - speed constant - frequency ( vscf ) operation is a new high efficient technology for power generation , which has a good future in the field of wind power generating
变速恒频发电技术是一种新型高效的发电技术，在风力发电领域有着良好的应用前景。 |
| 3. | The feasibility and superiority for the disc - type permanent - magnet synchronous generator used in the direct - dirve variable - speed constant - frequency generator applications is explained
解释了将盘式永磁同步发电机应用于直驱式风力发电系统的可行性和优越性。 |
| 4. | The wind power generation technology also become research hotspot of many country ’ s scholar . and the direct - drive variable - speed constant - frequency ( vscf ) generation technology is paid attention to more and more for its high efficiency and practicability
它具有结构紧凑、通风效果好、转动惯量大和高效率等的特点,比较适用于直驱式的变速恒频的风力发电系统中。 |
| 5. | 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
摘要在风力机空气动力学特性分析的基础上，讨论了变速恒频风力机组变桨距机构在低于额定风速阶段和高于额定风速阶段的不同控制策略。 |
| 6. | 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
本文以国家863计划《兆瓦级变速恒频风电机组》 (课题编号： 2001aa512022 )为背景，主要研究了兆瓦级风电机组的变桨距机构及其单机控制系统。 |
| 7. | In this article a new type wind generator - ac exited wind generator is introduced which new technology scheme by the variable - speed constant - frequency methods at the present time . the thesis mostly studies the way of some control methods and analysis the characters of vscf wind power system
本文全面介绍了一种最新应用于风力发电的变速恒频技术、基于变速恒频技术的新型电机?交流励磁发电机及交流励磁风力发电机系统的各种控制原理。 |
| 8. | The study indicates that there are some differences between the multilayered films and the uniform films in the dielectric constant - frequency relation and capacitance - voltage chara cteristics . the report also analyses the mechanism of dielectric enhancement of the multilayered thin films prepared by the sol - gel process
研究同时表明， batio _ 3 srtio _ 3多层膜与单层膜的介电频率色散程度、 c - v特性和介电系数与温度的关系均略有不同。 |
| 9. | The paper has done all - around study on the ac excited of variable - speed constant - frequency ( vscf ) wind power generation . the author has done thorough study on the vscf wind power generation technology using wound - rotor doubly - fed induction generator , from simulation to experiment , from theory to practice . he also did at large theory analysis to the vscf wind power generation technology using cascaded brushless doubly - fed generator , and has established stability theoretical foundation for continue study work
本文对交流励磁变速恒频风力发电领域的关键技术进行了较为全面的从仿真到实验、从理论到实践的深入研究，同时对具有广泛潜在应用前景的级联式无刷双馈发电机变速恒频风力发电技术也进行了洋尽地理论分析，为今后进一步的深入研究奠定了一定的理论基础。 |
| 10. | In this paper , several scheme of vscf is compared firstly , of which gets doubly - fed generating mode . doubly - fed vscf wind power generating system uses a doubly - fed induction generator , which rotate speed can be able to change with wind turbine , and it ensures a constant - frequency output , by controlling the frequency of current input into rotor windings . in vector trans control system , the control of stator active power and the control of stator reactive power can be essentially decoupled , and the former is via torque component and the latter is via exciting component of stator current
本文首先比较了几种变速恒频方案，从中选择了双馈式变速恒频方案；它运用双馈电机的工作原理，允许发电机转速变化，而在电机转子侧接入低频励磁电流，通过控制该电流的频率，保证双馈电机定子输出的频率恒定；再结合矢量控制技术，通过调节转子电流来控制定子电流的转矩分量和励磁分量，相应独立地控制发电机输出的有功功率和无功功率。 |
