Abstract: Real time monitoring of equipment voltage is particularly important in the power grid. Based on the PMS intelligent operation and inspection control platform system, it realizes equipment voltage anomaly diagnosis, fault alarm, and work order processing. Establish a digital, information-based, and intelligent control system for transportation and inspection business. To achieve the goal of intelligent control of real-time throughout the entire process of power grid equipment. Improve the quality and efficiency of transportation inspection work. Based on this, this paper proposes how to quickly diagnose and analyze the abnormal causes of equipment voltage based on the PMS intelligent platform. Make timely control decisions. Avoid voltage transformer and other equipment failures causing substation shutdown and fault expansion. It has the advantages of quickly identifying equipment faults and accurately identifying results. It has strong practicality.