Adaptive three-phase reclosure scheme based on the correlation of currents between compensation reactors.

• The paper has derived the correlations between the current of the neutral point reactor and the phase current of shunt reactors. After opening of the transmission line, due to the occurrence of permanent SPG or DPG faults, the current of the neutral point reactor is negatively correlated with the faulted-phase current of shunt-reactors. While these correlations would become invalid after the transient faults are cleared. • The paper proposed an adaptive three-phase reclosure method, which used Pearson correlation coefficient (PCC) to evaluate correlations between the currents of compensation reactors and construct a criterion for detecting when faults were cleared. • The proposed ATPAR scheme is easy implemented with low computational complexity and a fixed threshold. Simulation results showed that the ATPAR scheme proposed could reliably identify the fault nature and was unaffected by fault conditions and measurement errors. This study proposes a novel adaptive three-phase auto-reclosing (ATPAR) scheme for shunt-compensated transmission lines when a single- or double-phase-to-ground fault occurred, which is conducted on the correlations between the currents of shunt-reactors after the line opened. In this paper, the currents characteristics of compensation reactors are analyzed firstly through fault boundary condition theoretical, then, Pearson correlation coefficient (PCC) is used to construct criterions for identifying fault nature and fault cleared time. The proposed ATPAR scheme is implemented on a 230 kV-60 Hz IEEE 9-BUS power simulation system by using ATPDraw, and various faults which considered different fault conditions are simulated. The extensive simulation results verify the efficiency and reliability of the proposed ATPAR scheme. [ABSTRACT FROM AUTHOR]