Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON an...Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON and master slave RS 422/485 protocol. This design adopts LON as the trunk, master slave RS 422/485 control networks are connected to LON as special subnets by dedicated gateways. It is an implementation method for isomerous control network integration. Data management is ranked according to real time requirements for different network data. The core components, such as control network nodes, router and gateway, are detailed in the paper. The design utilizes both communication advantage of LonWorks technology and the more powerful control ability of universal MCUs or PLCs, thus it greatly increases system response speed and performance cost ratio.展开更多
为实现“双碳目标”,电力系统逐步向清洁低碳的能源互联网形式发展。电力电子变压器在能源互联网中广泛用作电能路由器的执行机构,因而催生出对全新测控系统的需求。针对模块化多电平电力电子变压器(Modular Multilevel Converter Based...为实现“双碳目标”,电力系统逐步向清洁低碳的能源互联网形式发展。电力电子变压器在能源互联网中广泛用作电能路由器的执行机构,因而催生出对全新测控系统的需求。针对模块化多电平电力电子变压器(Modular Multilevel Converter Based Power Electronic Transformer,MMC-PET)的结构特征,设计一个人机交互可视化平台。基于ModBus协议,实现触摸屏端与主控器间的通信,通过对触摸屏界面的设计完成平台开发。实物验证结果表明,该平台运行稳定,能够进行良好的人机交互。展开更多
文摘Aiming at the weaknesses of LON bus, combining the coexistence of fieldbus and DCS (Distribu ted Control Systems) in control networks, the authors introduce a hierarchical hybrid control network design based on LON and master slave RS 422/485 protocol. This design adopts LON as the trunk, master slave RS 422/485 control networks are connected to LON as special subnets by dedicated gateways. It is an implementation method for isomerous control network integration. Data management is ranked according to real time requirements for different network data. The core components, such as control network nodes, router and gateway, are detailed in the paper. The design utilizes both communication advantage of LonWorks technology and the more powerful control ability of universal MCUs or PLCs, thus it greatly increases system response speed and performance cost ratio.
文摘为实现“双碳目标”,电力系统逐步向清洁低碳的能源互联网形式发展。电力电子变压器在能源互联网中广泛用作电能路由器的执行机构,因而催生出对全新测控系统的需求。针对模块化多电平电力电子变压器(Modular Multilevel Converter Based Power Electronic Transformer,MMC-PET)的结构特征,设计一个人机交互可视化平台。基于ModBus协议,实现触摸屏端与主控器间的通信,通过对触摸屏界面的设计完成平台开发。实物验证结果表明,该平台运行稳定,能够进行良好的人机交互。
