Design Of DC System Ferry To AC Monitoring Device

Nowadays, our country’s electric power industry is booming, and the most important is dc power supply system in the power system, dc power system can provide a stable dc power supply to ensure the equipment to work well, dc power supply system plays an important status in the electric power plant and in the large industry area, the safety of the various power plants, power plant power generation and the power transmission system is playing a important role in the whole country and people’s daily life, therefore, safe and stable operation of dc power supply system has the important significance, The detection research of the dc power system hybrid which has mix ac power is very necessary.The study which bases on the embedded system is a system of detection which can detect the dc power system fault that has mixed the ac power; the system can detect the ac voltage. And the STM32 system drive the 12864 LCD, the system can display the voltage value and the time of the fault. The display can be set for human-computer interaction use the button, it can set the export detection, alarm threshold, baud rate and communication self-checking, time set, the lower computer through RS232 and RS485 serial communication with PC transmit data, and the communication comply with the MODBUS communication agreement, Detection system can transmit and preserve the fault information, PC software running on Windows platforms, PC software receives the fault information and stores them in the database, to make it easy to check up and repair.Finally, to carry on the debugging the whole system, the whole work is running well, the detection of dc power supply system has the certain application value. The measuring range is 0-600 v, measurement accuracy is 10%, and the study has achieved the desired accuracy.