智能变电站是坚强智能电网的重要基础和支撑，而设备智能化和高级智能应用是智能变电站的主要特征。变电站中断路器是机械和电气动作频繁的设备，易于发生故障。断路器状态的在线监测和远方监控，为电网的智能化打下了基础。本文在介绍了高压断路器状态监测技术发展史、现状和趋势的背景下，分析和比较了已有断路器监测理论，围绕研制一种新型变电站高压断路器状态监测系统和解决相关问题展开论述。 电寿命是衡量断路器使用寿命最重要的指标。本文采用基于模糊数学理论的电寿命模糊评判方法，建立了电寿命模糊诊断数学模型，在此基础上对断路器电寿命进行预测评估。另外采用改进型相对电磨损与相对电寿命法，直接利用触头的磨损量极限值来定义断路器电寿命，此方法弥补了电寿命模糊诊断中涉及不到的部分，使断路器电寿命状态监测诊断更加全面、准确，从而有助于提高状态监测水平。 本文设计了高压断路器在线状态监测系统方案，可在线监测高压断路器的机械特性、电寿命、二次操作回路完好性及其各种绝缘状态。对此，给出了系统总体软硬件设计方案，及机械寿命、电寿命、分合闸线圈电流分析等子程序软件详细设计。

Smart substation is an important foundation and support for a strong smart grid，and application of intelligent devices and advanced intelligence are the main features of smart substation．In smart substation，circuit breakers are liable to faults because it operates frequently in electric and mechanism．It provides the basis for smart substation to realize circuit breaker on-line monitoring and remote control．Under the background of high voltage circuit breaker condition monitoring history、current status and trends，in this paper we have designed a framework for on-line condition monitoring device for high voltage circuit breaker of substation and have resolved some problem． Electrical endurance is the most important index of circuit breaker’s endurance life．With fuzzy diagnosis theory，a fuzzy diagnosis model of high voltage circuit breaker’s electrical life is resented in this paper．And it is used for forecasting and assessing electrical endurance．In addition，based on improved relative electrical wear and electrical life method，the wear limit of contact is directly used for defining circuit breaker electrical life．The latter make up the deficiency of fuzzy diagnosis method，improving the level of condition monitoring． The paper design the device for on-line condition monitoring of high voltage circuit breaker．The device can monitor and analyze mechanical characteristics、electrical endurance、states of secondary operation circuit of breakers．we have designed system hardware、software program and detailed software Subroutine design of mechanical endurance、electrical endurance、states of secondary operation circuit．