对测试环境和测试装置的模拟在研发、测试中有着重要作用。目前,厂站自动化系统基于网络的、开放式的、分层分布式的结构特征以及未来数字化变电站建设的发展趋势,使得研发一种通用模拟装置成为可能。文中介绍了一种通用模拟系统——SimRTU系统,阐述了系统的设计和实现,以及其所具有的通用、便携、易于升级和可裁减的特征。 Simulation of the test environment and test equipment plays an important role in the R & D and testing. At present, the automation of plant automation system based on the network, open, hierarchical structure of the distributed features and future trends in the development of digital substation, making it possible to develop a generic simulation device. This paper introduces a universal simulation system - SimRTU system, describes the system design and implementation, as well as its common, portable, easy to upgrade and cut features.