500kV变电站自动化系统结构的探讨

A DISCUSSION ON THE STRUCTURE OF 500kV SUBSTATION AUTOMATION SYSTEM

根据浙江省 5 0 0 k V变电所自动化调研和双龙变的工程试点 ,探讨了 5 0 0 k V变电所自动化系统的结构 ,通过对比 ,明确了分散式变电所自动化系统较集中式系统有更多的优越性。随着信息技术、通信技术的迅速发展 ,变电所自动化系统中各组成部分的可靠性和性能都有较大提高 ,为简化变电所自动化系统奠定了良好的技术基础。根据双龙变的变电所自动化系统实施情况 ,提出了简化所级计算机系统、站级计算机网络采用单以太网、取消 (减少 )保护管理机、采用网络新技术。

According to the investigation and study of substation automation for 500kV substation in Zhejiang province and engineering practice of Shuanglong substation, the structure of 500kV substation automation system is discussed. In this paper two kinds of substation automation systems, i.e., the centralized system and the decentralized system, are compared, comparison results show that the performance of the latter is better than that of the former. Along with the development of information technique and communication technique, the reliability and performance of the components in substation automation system are greatly improved, therefore, a good technical foundation for the simplification of substation automation system is laid. On the basis of implementation of the substation automation system for Shuanglong substation, several suggestions such as simplifying the computers system in station level, applying single ether network to station level, canceling or reducing the protection management computer, adopting new network technology and applying integrated devices in low voltage system, etc., are proposed, and an optimum structure of substation automation system based on the above mentioned deductions is put forward.