Integrating Distribution Generators in Microgrid with an Adaptive
Protection Scheme using Chaotic Leader Honey Badger Algorithm
Abstract
The integration of distributed generators (DGs) into electrical networks
has become more prevalent due to their operational benefits. However,
switching the DG on or off changes the fault current’s magnitude and
direction, making an adaptive protection scheme (APS) necessary. This
paper proposes a novel APS that optimally coordinates overcurrent
relays, including Distance and directional overcurrent relays
(D&DOCRs), at each transmission line’s ending near and far. This
coordination problem is highly constrained and complex, involving
coordinating primary and backup relays between DOCRs pairs and D&DOCRs
pairs. To solve this optimization problem, the paper implements a
modified Honey Badger algorithm (HBA), called CLHBA, that uses chaotic
initialization and leader-based mutation selection. The proposed scheme
is adaptable to changes in the electrical network’s state caused by
switching the DGs on or off. The paper tests the proposed scheme on IEEE
8-bus and 14-bus distribution systems to demonstrate its ability to
solve coordination problems.