Bus protection measure analog quantity on-line checking method and system

The invention discloses an analog quantity on-line checking method and system for bus protection measures, and relates to the technical field of electric power, and the method comprises the steps: collecting analog quantity through bus relay protection measures, and transmitting the analog quantity to a secondary intelligent operation and maintenance environment through a protection and information substation; the secondary intelligent operation and maintenance environment is checked online through phase current branch data, differential current branch data, steady-state homologous current branch data, zero-sequence current branch data and voltage branch data in bus relay protection measures. According to the invention, the sampling value and the average phase current value are compared, differential current data are judged by using a differential current secondary value, and comprehensive judgment is carried out on the basis of verification results of each branch by comparing a current transformer winding an