现有的变电所电力设备绝缘在线监测系统大多采用传统的上下位机结构 ,造成系统集成性差 ,不便于软件升级和扩充。文中提出一种基于 CAN总线的变电所高压电力设备多 DSP、多微机分布式绝缘在线监测系统 ,它是由多个面向设备的以 DSP为核心的智能处理单元、多个并行运行具有不同的监测和故障诊断功能的微机构成的分布式系统。该系统采取“分治”的设计思想 ,将数据采集、部分数据处理任务交给设备层的智能处理单元完成 ,监测诊断层主要负责监视和故障诊断 ,并利用 CAN总线实现设备层的检测处理单元间的通信及与上层监测主机的通信。文中给出了系统实现框架 ,并提出了一种简捷、可靠的分布式对象调度机制。最后以变压器绝缘在线监测为实例加以说明 The existing on-line monitoring system of power equipment insulation in substations mostly adopts the traditional upper and lower-bit machine structure, resulting in poor system integration and inconvenience in software upgrade and expansion. This paper presents a CAN-based substation high-voltage power equipment multi-DSP, multi-microcomputer distributed insulation online monitoring system, which is composed of a number of device-oriented to DSP as the core of the intelligent processing unit, a number of parallel operation with different Monitoring and fault diagnosis function of the computer consisting of a distributed system. The system adopts the design concept of “divide and conquer”, and takes data acquisition and some data processing tasks to the intelligent processing unit of the device layer. The monitoring and diagnosis layer is mainly responsible for monitoring and fault diagnosis, and the device layer detection and processing unit Communication between the host and the upper monitoring. In this paper, the system implementation framework is given, and a simple and reliable distributed object scheduling mechanism is proposed. Finally, transformer insulation on-line monitoring as an example to illustrate