The Research On Digital Cooling Control System For Electric Power System Transformer

For the existing transformer cooling control system has many shortcomings such as the complicated system control circuit, the low reliability, the protection methods of blower fan being so simple, large control error, high fault rate, massive maintenance work and no method to realize telecommunication, this thesis develops a novel intelligent power transformer air-cooled control system based on the center of microprocessor through all-round technology analysis and research. The complete air-cooled control system has been realized by AT89C52 microprocessor and ICL7109 the integral ADC which has high counter-interference capability. The main circuit uses non-contract solid module and has the characteristics of high speed switching off and avoiding contract burned to stop blower fan. The practical operation proved that the device signed in the thesis is the perfect product in place of the conventional air-cooled control system.