*3.1. Formulating the OCR Coordination Problem*

This study formulates the problem of OCR coordination in a DN that has DGs as a problem of optimization to discover the TMS which minimizes the OT for OCRs, insuring the selectivity between the primary relay and backup relay. This part introduces the suggested approach, mathematical formulae of the optimization for solving the issue of coordination, and the performance of the OCR optimization techniques in the MG protection in comparison to the traditional protection approaches.
