提出了一种实用的基于 SCADA模式的无功电压自动监控的专家系统 ,该系统拓展了SCADA的功能 ,综合利用主站系统提供的丰富信息进行防错处理和上下级厂站的统一考虑 ,需要规则、时段、限值的相互协调 ,适应电网自动化发展的趋势 ;并介绍了该系统设计的基本原则、方案、特点以及实现中应注意的问题。该系统的运行结果表明其对改善电压质量的效果是显著的 A practical expert system for reactive power and voltage automatic monitoring based on SCADA mode is proposed. The system expands the functions of SCADA, and makes comprehensive use of the rich information provided by the master system for error proofing and unification of upper and lower plant sites. Rules, time, limit the mutual coordination, to adapt to the development trend of power grid automation; and introduces the system design of the basic principles, programs, features and implementation should pay attention to. The operating results of this system show that its effect on improving voltage quality is significant