中文摘要：

尽管保护的新技术和变电所的自动化系统在中国很快基于 IEC61850 标准发展了，取决于这种技术的可靠性措施需要进一步被研究。由利用方便信息分享，二种新计划，分享的备份保护单位(SBPU ) 和信号备份(SB ) ，被建议了分别地解决保护的设备和水流 / 电压的变换器的失败问题，并且这二的工作原则策划也被描述。而且，光或电子的水流 / 电压的变换器的诊断策划认识到二的保护的设备的失败和联机地位的联机诊断的关键技术被建议。

英文摘要：

Although the new technology of protection and automation system of substation based on IEC61850 standard has developed rapidly in China, reliability measures depending on this technology need to be further research＇ed. By taking advantage of convenient information sharing, two kinds of new schemes, shared backup protection unit （SBPU） and signal backup （SB）, have been proposed to solve the failure problem of protective devices and current/voltage transducers respectively, and the working principle of these two schemes are also described. Furthermore, the key technologies of on-line diagnosis of protective devices＇ failure and on-line status diagnosis of optical or electronic current/voltage transducers to realize the two schemes are proposed.