基于虚拟Modbus RTU技术的双以太网双主站冗余发电机励磁控制器设计  

Design of generator excitation controller based on virtual Modbus RTU technology with dual-Ethernet dual-master redundancy

作　　者：周宏林 刘静波 凌乐 ZHOU Hong-lin;LIU Jing-bo;LING Le(Central Research Academy of DEC,Chengdu 611731,China)

机构地区：[1]东方电气股份有限公司中央研究院

出　　处：《电工电能新技术》2020年第2期57-63,共7页Advanced Technology of Electrical Engineering and Energy

摘　　要：具有高可靠性要求的同步发电机励磁控制器一般工作于双以太网双主站冗余环境下。虽然国外高端控制器易于应对复杂网络通信环境,但随着近年市场竞争加剧以及自主可控要求的提出,励磁控制器需要探索新的降本增效路线。然而基于单片机或DSP的中低端励磁控制器由于硬件资源限制,难以同时兼顾控制性能和复杂网络接入两方面的要求。为解决此矛盾,本文提出一种基于虚拟Modbus RTU技术的双以太网双主站冗余发电机励磁控制器设计方法。该方法让承担励磁控制任务的核心芯片只需要做简单的"虚拟Modbus RTU"通信即可完成复杂的以太网接入。从而实现励磁控制与复杂网络通信任务间的解耦,有效降低励磁控制DSP核的通信负担,提升控制性能,同时还会给励磁控制器软件开发者带来极大的便利。本文首先介绍了励磁控制器的复杂网络工作环境和要求,然后提出了一种新的基于虚拟Modbus RTU技术的设计方案,接着给出了该设计的软硬件实现框架,最后通过RTDS半实物仿真实验全面验证了设计的可行性和性能。The excitation controller of synchronous generator with high reliability generally works with the dual Ethernet dual master redundancy. Foreign high-end controllers are indeed easy to cope with complex network environment,but with the intensification of market competition and the requirement of self-control in recent years,excitation controllers need to explore new ways to reduce costs and increase efficiency. However,due to the limitation of hardware,the excitation controller based on MCU or DSP can not meet the requirements of both control performance and complex network access. In order to solve this contradiction,this paper presents a design method of excitation controller based on the virtual Modbus RTU technology. This method enables the excitation control core to access the complex Ethernet only with simple virtual Modbus RTU communication. Thereby,the decoupling between excitation control and complex network communication is realized,the communication load of excitation control core is effectively reduced,and the control performance is improved. Moreover,it brings great convenience to the software developers of excitation controller. Firstly,the requirements of excitation controller are introduced. Then a new design scheme based on virtual Modbus RTU technology is proposed. After that the hardware and software implementation framework is given. Finally,the feasibility and performance of the design are fully verified by RTDS hardwarein-the-loop experiment.

关 键 词：同步发电机 励磁控制器 工业以太网 冗余 MODBUS 

分 类 号：TM341[电气工程—电机] TM571