And experiment was based on the simulation , the results show that charge circuit and uplifted circuit both was adopted the same circuit , which can realize energy bi - directional flow , also have low switch ullage and high dynamic response 在此基础上进行了实验研究，仿真和实验结果表明，该装置升压和降压只采用同一个主电路，即可实现能量的双向流动，且具有低开关损耗和较高的动态响应。
The simulation result indicates single - phase reversible rectifiers have some advantages , such as high power factor , controllable dc voltage on bus bar and bi - directional flow for power . this lays a good theoretical foundation for realization of prototype 仿真结果表明，单相可逆整流器具有功率因数高，直流母线电压可控，功率可双向流动的优点，为下一步样机的实现打下了良好的理论基础。
Bi - directional dc - dc converters can easily control the transfer of power between two dc sources , and will be widely used in applications as fuel cell vehicles , aerospace systems , and new power generation system which utilize clean energy 高功率密度双向dc - dc功率变换器能够高效率、灵活地实现对电能双向流动的控制,将广泛地应用在混合动力汽车、航天供电系统、新能源再生能源发电等系统中。
For the requirement of real - control , the control algorithm is wrote with the ti company ' s commom digital signal processor tms320f240 , so the real - control , adjustable power factor , constant voltage and current output and two - way transtormation of energy are realized 根据实时控制的要求，采用ti公司的通用数字信号处理器tms320f240编写了控制算法，实现对可逆变流器的实时控制、功率因数可调、稳压和稳流输出以及能量双向流动。
So there are good prospects for alternating current excitation generators . in this thesis , the operation principle of aceg and the excitation control strategy based on dynamical synchronous reference frame are analyzed , the simulation models of the generator and excitation controller are established based on the saber simulator . according to the requirement of aceg , the converter should have regeneration capability , and the input and output currents of converter should be sinusoidal 由于交流励磁发电机既可能运行于励磁系统向电机转子方输入电功率，也可能运行于励磁系统将转子方输出的电功率回馈给电网，根据交流励磁发电机系统对励磁变频器功率双向流动及变频器输入和输出电流谐波含量少、谐波幅值小的要求，本文提出采用输入和输出性能优良的矩阵式交-交变频器作为励磁电源。
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。
Secondly , to achieve the independent regulation of active and reactive power output from the generator side which is designed for the purpose of tracing the maximum wind - energy capturing . the paper has analyzed the mathematic model of the ac excited doubly - fed machine and the stator field orientation control strategy of the motor as vscf wind power generator . thirdly , it has put forward and designed the dual pwm converter with the capacity of energy flowing bidirectional aimed at the demand of rotor energy bidirectional flow . the author constructed reliable and integrated experimental system and did a series of experimental study including no - load , cutting - in network and power generation at , below and above the synchronous speed 论文首先分析了风机运行特性及其最佳风能利用原理，通过仿真及实验验证了采用直流电机的输出特性模拟风力机的最大输出功率曲线的可行性，并给出了模拟系统的硬件结构；然后为了实现交流励磁发电机有功、无功功率独立调节机理，分析了交流励磁双馈发电机的数学模型和在追踪最大风能捕获变速恒频风力发电时必需的定子磁链定向矢量控制策略；针对双馈发电机转子能量双向流动的要求，提出并设计了具有能量双向流动能力的双pwm交流励磁用变频器；最后为实现从理论到实践的全面研究，研制出了一套小功率完整的双pwm变频器交流励磁的双馈风力发电机实验系统，进行了空载、并网、同步速及上、下的发电运行等一系列的运行实验；所完成的仿真和实验研究均验证了理论、模型和控制策略的正确性、可行性。
Matrix converter ( mc ) is a power converter based on ac - ac direct conversion . more and more attention is paid to mc depending on its adventages , such as omitting the dc part , obtaining unit power factor , getting sinusoidal input currents and output voltages and easy to realize bidirectional flow of energy 矩阵变换器作为交交直接变换的功率变换器,以其无中间直流环节、具有单位输入功率因数和良好的正弦输入电流、易于实现能量双向流动等优点受到了国内外学者的广泛关注。
With the serious problem of harmonics pollution to the power system , as well as the need of high performance of ac drive application , three - phase pwm rectifiers have been as active research topic in power electronics recently , due to the virtues , such as sinusoidal input currents , unity power factor , steady output voltage , good dynamics and bin - directional energy flow 随着电网谐波污染问题日益严重和人们对高性能电力传动技术的需要， pwm整流技术引起人们越来越多的注意。三相pwm整流器可以做到输入电流正弦、单位功率因数、直流电压输出稳定，具有良好的动态性能并可实现能量的双向流动。因此， pwm整流器成为当前电力电子领域研究的热点课题之一。
As a major innovation point , the article puts forward the implementation mechanisms of coordination development between urban and rural areas : innovative system is the head ; infrastructure construction and social development are the base ; restructuring the industrial structure is the driving force ; two - way flow of production factors is the prop ; sound legislation and system are the guarantee ; urban and rural integration is the purpose 作为主要创新点,提出了以制度创新为先导,以基础设施建设和社会事业发展为基础,以产业结构调整为动力,以城乡生产要素的双向流动为依托,以健全的立法和完善的制度为保障,以城乡一体化为目的的统筹城乡发展的实施机制。
