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基于串行光纤通信技术的分布式控制是大容量电力电子变流系统的一个发展方向。该文针对现有电力电子变流系统分布式控制方案存在的一些缺陷,提出一种软件控制可切换数据通道的高速光纤环形网络拓扑结构,并制定了简单可行的通信协议,简化了通信控制的软件编程和测试难度,提高了同步精度,同时也较大程度地减小了整个高速光纤环形控制网络的传输延时,扩展了基于高速光纤环网通信拓扑的分布式控制方案在复杂高性能电力电子变流系统中的应用范围。最后,该文给出了相应的数据传输、数据源切换以及反馈数据上传等方面的实验结果,验证了该种网络拓扑及协议的正确性、有效性和可行性。
Distributed control based on serial optical fiber communication technology is a development direction of high-capacity power electronic converter system. In this paper, aiming at some shortcomings of the existing distributed control schemes of power electronic converter system, a high-speed optical fiber ring network topology with software controlled switchable data channels is proposed and a simple and feasible communication protocol is developed to simplify the communication control Software programming and testing to improve the synchronization accuracy, but also to a large extent reduce the transmission delay of the entire high-speed optical fiber ring control network and extend the distributed control scheme based on high-speed optical fiber ring communication topology in the complex high-performance electric power Electronic converter system in the scope of application. Finally, the experimental results of the corresponding data transmission, data source switching and feedback data upload are given. The correctness, validity and feasibility of this kind of network topology and protocol are verified.