文中简述了南瑞MB系列iPLC的技术特点和应用情况,在此基础上介绍了南瑞MB系列iPLC的现应用情况,阐述了MB系列iPLC在水电厂计算机监控系统领域的关键技术以及成功应用,证明了南瑞公司已研制开发出具有完全自主知识产权的PLC产品,打破了国外技术垄断,可以完全满足水电厂计算机监控系统使用需求。 In this paper, the technical features and applications of NARI MB series iPLC are briefly introduced. Based on this, the present situation of application of NARI MB series iPLC is introduced, and the key technologies of MB series iPLC in the field of computer monitoring and control system of hydropower plant are described. It proves that NARI has developed a PLC product with completely independent intellectual property rights, has broken the monopoly of foreign technology and can fully meet the needs of the computer monitoring system of hydropower plants.