变电站自动化系统中常采用 CAN总线实现间隔层与变电站层之间的数据通信 ,因而 CAN总线到变电站层 PC主机的数据通信成为影响系统性能的一个重要因素。 USB总线是一种串行总线标准。文中介绍了一种具有 USB接口的 CAN通信控制器 ,该通信控制器具有 USB的连接简单、传输速率高的优点 ,同时在软硬件实现上充分考虑了变电站环境的特点 ,采取多种措施保证系统通信的可靠性 Substation automation systems often use CAN bus to achieve data communication between the bay level and the substation level, so CAN bus to the substation level PC host data communication has become an important factor affecting system performance. USB bus is a serial bus standard. In this paper, a CAN communication controller with USB interface is introduced. The communication controller has the advantages of simple connection and high transmission rate of USB. At the same time, it fully takes into account the characteristics of substation environment in hardware and software implementation and adopts various measures to ensure that the system Communication reliability