一种应用于柔性直流输电控制保护系统的波特率动态自适应通信技术

A Baud Rate Dynamic Adaptive Communication Technology for Flexible DC Transmission Control and Protection System

柔性直流输电控制保护系统中的一个重要环节是内环控制与外部设备之间的通信,要求高速且稳定,控制保护系统的国产化替代对其通信的稳定性和兼容性提出了更高的要求。内环控制所需的测量量由电子式互感器合并单元采集处理并传输,其通信信号具有正反曼码及多种波特率编码的特征,常规解码算法由于兼容性差易导致解码失败。文章以电子式电流电压互感器标准为基础,对其通信协议数据帧格式的编解码过程进行研究分析,提出并实现了基于国产FPGA芯片的正反曼码及波特率动态自适应的IEC60044-8通信接口设计方法。经过实验验证,该方案实时性强、识别准确度高、兼容性强,具有广泛的应用价值。

An important link in the flexible DC transmission control and protection system is the communication between the internal control and external equipment,which requires high speed and stability.The localization substitution of the control and protection system puts forward higher requirements for the stability and compatibility of its communication.The measurement required by the inner loop control is collected,processed and transmitted by the merging unit or transformer.Its communication signal has the characteristics of positive and negative Manchester code and various baud rate coding.The conventional decoding algorithm is easy to fail due to poor compatibility.On the basis of the standard of electronic current and voltage transformer,this paper studies and analyzes the encoding and decoding process of its data frame format of the communication protocol,and puts forward and implements the design method for IEC60044-8 communication interface based on positive and negative Manchester code and baud rate dynamic adaptation of domestic FPGA chip.The experimental results show that the scheme has strong real-time performance,high recognition accuracy and strong compatibility,and has a wide range of application value.