Various kinds of distributed generations (DGs) are being increasingly connected on the distribution systems and computer network-based controls are introduced to assist the system operations. This paper proposes a new network-based adaptive strategy for protection of distribution-system feeders connected with DGs. The proposed strategy provides an intelligent network-enabled protection for feeders and overcomes the DGs-imposed technical challenges such as increase of fault current, change of prescribed fault flow paths, sympathetic tripping, unintentional islanding operation, continuous non- interruptible fault current, etc., as well as non-DG-caused problems such as undetected high-impedance ground faults. This paper illustrates effective real-time determination of correct protection operations for feeders with dispersed DG-connections against faults and surges resulting from lightning, switching, equipment short-circuit, etc. Four typical case studies of the proposed network-enabled adaptive protection strategy for feeders in the distribution system connected with DGs are provided in the paper.
No takes yet. Share an insight, caveat, or question.
Cheung et al. (2007) studied this question.