A Substation Area Information Based Optimal Scheme for Inverse Time Overcurrent Protection Through Dynamic Voltage Compensation

Abstract

For some power grid topologies, there will be limitations in coordination for voltage correction based inverse time overcurrent protection. To solve this problem, the above limitations are analyzed at first in this paper. Then based on substation area information sharing, this paper proposes to use the voltage information of the high side of transformer to dynamically compensate for the inverse time characteristic curve equation, which can effectively compensate for the limitations of voltage correction based inverse time overcurrent protection scheme, and improve the properties of inverse time overcurrent protection significantly. The theoretical analysis and simulation results show that the proposed scheme has the feasibility and good practical value.