Abstract: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 DS18B20 chip. The switch quantity monitoring module adopts AVR single chip microcomputer Mega64L-8AU as the control unit, and installs 600W lightning and surge protection device at the communication interface, with 3000V 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. |