A Novel Protection Scheme for DC Distribution Network with Multi-terminal PV

Abstract

For the sake of meeting the fast isolation of faulted areas for DC distribution network with multi-terminal PV, a novel DC protection scheme is proposed. This scheme is on the basis of the DC current differential coefficient under fault transients, which are the characteristics of the DC current. This property is banded with different settings of value to realize the protection of the DC distribution network with multi-terminal PV. The proposed scheme can realize isolation of faulted areas without communication to satisfy the speed. This scheme, which is simulated on the looped DC distribution network with multi-terminal PV, can detect network faults. The theoretical analysis and simulation results verify that the proposed protection has the effectiveness and superiority.