发电厂及变电站二次设备分布式直流电源系统探讨

直流电源系统是发电厂和变电站的重要组成部份，它承担对继电保护装置、自动装置、测量系统、通信系统、监控系统、遥视系统、事故照明、不允许停电机械等的供电任务。将集中供电的直流系统改造为分布式系统可提高直流电源供电的可靠性。效率高、体积小、重量轻、指标好、交直流电源通用的逆变开关电源为集中式直流电源系统改造为分布式直流电源系统创造了条件。实现方法是将集中的充电器、蓄电池组、监测仪表分解为安装在受电设备附近的多个直流电源屏，并将它们纳入分布式监控系统。

Discussion of distributed DC supply system for power plant and substation

DC supply system is a vital part in power plant and substation,which supplies DC power to relay protective devices,automation devices,metering system,communication system,monitoring and control system,remote vedio system,emergency illumination,power-uninterruptable mechanism,etc. Transforming the centralized DC supply system into distributed system may improve its reliability. The efficient,small,light,high frequency switching mode DC / AC power supply with better performance makes it possible. The method is to disassemble the centralized charger,battery,monitoring meters into different distributed DC supply panels,which are near the power consumers and integrated into DCS(Distributed Control System).