独立型微电网柴油发电机组并联逆变器控制方法研究  

Research on parallel inverter control method for diesel generator set in stand-along microgrid

作　　者：高明宇 刘金宁 冯长江 GAO Mingyu;LIU Jinning;FENG Changjiang(Department of Vehicle and Electrical Engineering,Shijiazhuang Campus of Army Engineering University of PLA,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区车辆与电气工程系,河北石家庄050003

出　　处：《现代电子技术》2021年第7期153-157,共5页Modern Electronics Technique

基　　金：国家自然科学基金(51307184)。

摘　　要：在独立型微电网中,针对交流母线上逆变器与柴油发电机组并联运行中因响应速度不一致而导致的系统冲击和功率震荡问题,提出一种虚拟柴油发电机组控制方法,使逆变器与柴油发电机组的响应速度和输出特性趋于一致,实现系统的稳定并联和运行。针对引入虚拟柴油机控制方法所带来的调节时间过长的问题,通过研究虚拟同步机控制和虚拟柴油发电机组控制中虚拟原动机和虚拟励磁机的结构特性,加入由PI控制器和缓冲器构成的转换预同步模块,建立虚拟同步机-虚拟柴油发电机组控制方法切换模式,使系统的稳定性和快速性得到有效统一。最后利用Matlab/Simulink仿真工具验证了该方法的有效性。In view of the system shock and power oscillation caused by the inconsistent response speed in the parallel operation of the inverter and the diesel generator set on the AC bus in the stand-along microgrid,a virtual diesel generator set control method is proposed,which makes the response speed and output characteristics of the inverter and the diesel generator set tend to be consistent,and realizes the stable parallel and operation of the system.In view of the too long regulating time caused by the introduction of virtual diesel engine control method,the structural characteristics of virtual prime mover and virtual exciter in the control of virtual synchronous engine and virtual diesel generator set is studied,the conversion presynchronization module composed of PI controller and buffer is added,and the control method switching mode of virtual synchronous generator(VSG)and virtual diesel generator set(VDGS)are established,which makes the stability and rapidity effectively unified.Finally,the effectiveness of the proposed method is verified on the simulation platform Matlab/Simulink.

关 键 词：微电网 虚拟柴油发电机组控制 逆变器 柴油发电机组 模式切换 虚拟同步机 

分 类 号：TN98-34[电子电信—信息与通信工程]