The steady state and transient characteristics of the aceg system are simulated , the harmonics of the emf and stator current and rotor current as well as mc ' s input current are researched . the operation characteristics of aceg with mc as an exciter are compared to those of aceg with ac - dc - ac converter and cycloconverter as an exciter . the results in this thesis will be helpful to the design of the aceg excitation control system 利用所建模型，对交流励磁发电机系统的稳态调节特性、暂态特性进行了仿真研究；仿真研究了发电机定、转子电流和感应电势及变频器输入电流波形，并作了相应的谐波分析；与交-直-交变频器和交-交变频器作励磁电源时发电机的运行特性进行了对比分析。
Also ac exited generator have many excellent characteristics , it may improving the stability of electric power system , its rotor speed may adjustable , it have abilities for active and reactive power regulating in self - help ways , it not lose steps even when operated in deep lead phase , so it especially applied in wind electric power plant and pumped - storage hydraulic power plant 交流励磁发电机作为发电机运行的风力发电系统，利用变速恒频技术后可大大提高风能的利用率。交流励磁发电机可改善电力系统稳定性，转子转速可变，具有独立的有功无功调节能力，可以深度进行运行而不失步，特别适用于风力发电、抽水蓄能电站等场合。
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。
