Synchronization of fiber optic differential protection data in power systems based on improved sensitivity analysis

Abstract

The traditional method of synchronizing fiber optic differential protection data is synchronized by correcting the clock of the sampling device, which has the problems of long adjustment time and large error when applied to complex systems. To this end, a method for synchronizing fiber optic differential protection data in power systems based on improved sensitivity analysis is proposed. The improved sensitivity method is used to analyze and calculate the out-of-limit values in the power system, thus facilitating the compensation of transient and steady-state capacitive currents. After constituting the power system fiber-optic differential protection criterion, the data synchronization is realized with the premise of equal communication routing. Simulation experimental results show that the error of the proposed synchronization method is reduced by about 50%, and the method has higher sensitivity and superior performance.