分布式直流电源远程监控系统及关键技术设计

Distributed DC Power Remote Monitoring System and Key Technology Design

为了提高分布式直流电源远程监控能力,构建了分布式直流电源远程监控系统架构,能够使其中的各种数据模块实时在线获取直流电源的实时数据信息,并将该数据信息传递到控制中心,从而实现动态调节智能化控制。在实现数据监控时,主控制器采用MSP430系列单片机,通过测量交流压降的方法采集电源的电压,温度检测电路采用DS18B20芯片。开关量监控模块采用AVR单片机Mega64L-8AU作为控制单元,并在通信接口处加装600W的防雷防浪涌保护装置,带有3000V的光电隔离。并设计出故障诊断电路,结合电阻平衡法、不平衡桥法和直流差流法对母线和支路接地故障进行诊断。试验结果表明,本研究方法能够大大提高分布式直流电源远程监控能力。

In order to improve the remote monitoring capability of distributed DC power supply,a distributed DC power supply remote monitoring system architecture has been constructed,which can obtain various data modules in it online in real time Real-time data information of the DC power supply,and transfer the data information to the control center,so as to realize the intelligent control of dynamic adjustment.When realizing data monitoring,the main controller adopts the MSP430 series single-chip microcomputer,which collects the voltage of the power supply by measuring the AC voltage drop,and the temperature detection circuit adopts the DS18 B20 chip.The switch quantity monitoring module adopts AVR single chip microcomputer Mega64 L-8 AU as the control unit,and installs 600 W lightning and surge protection device at the communication interface,with 3000 V photoelectric isolation.And designed a fault diagnosis circuit,combined with resistance balance method,unbalanced bridge method and DC differential current method to diagnose the ground fault of the bus and branch.The results show that experiments,this research method can greatly improve the remote monitoring capabilities of distributed DC power supplies.