According to informatization background, the paper points out that power system informatization is the imperative requirement of development.In conjunction with the author's many years course engaging in work, the changes brought to protection before and after informatization are analyzed.The changes are all-around and gradual.Carefully understanding the changes is the future direction of development.Meanwhile, the paper presents some of author's own understanding on power informatization and realizes that a lot of problems need to solve in the depth of the vertical and horizontal width.Power system informatization is the prerequisite and foundation of intelligent.In addition, the power system informatization should develop by integrating into and comparing with informatization in other industries.%本文根据国家信息化的背景,指出电力系统信息化是发展的必然要求.结合自己多年从事工作的历程,比较了实行电力系统信息化的前后给保护工作带来的变化.这种变化是全方面的、渐进的.仔细的体验、理解这种变化,这正是未来的发展方向,同时对电力信息化提出了自己的一些认识、思考.认为电力系统信息化在纵向深度、横向宽度有很多的问题要解决.电力系统信息化也是智能化的前提与基础.另外,电力系统的信息化要与其它行业的信息化结合、比较的过程中发展.
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