实时以太网EPL在智能变电站中的应用

摘要

智能变电站常采用交换式以太网技术共享数据，这种方式简单高效却无法保证数据传输的实时性。比较各种实时以太网技术的特点，引入Ethernet POWERLINK(以下简称EPL)协议来改善智能变电站中数据传输的实时性。通过分析EPL的实时原理和协议结构，用BF536硬件平台加μCOS实时操作系统实现EPL的移植。在此基础上，结合智能变电站数据的特点，提出一种在智能变电站中应用EPL的方案。对该方案的通信性能进行了测试，测试结果表明该方案可行，为EPL技术的应用提供了参考。%Intelligent substation uses switched Ethernet to share data. In spite of simplicity and efficiency, it can’t promise timeliness. This paper introduces Ethernet POWERLINK (EPL) to improve the timeliness in substation. After analyzing EPL’s principle and protocol structure, EPL is transplanted using BF536 andμCOS real-time operating system. On this basis, this paper combines the data attribute in substation, introduces a solution which shows how to apply EPL in substation. Besides this, a comprehensive testing is carried out to explore the performance of the solution mentioned above. The test demonstrates the feasibility and provides a reference for its future application.