Power Distribution Grid Reliability Assessment Considering Protection and Control Devices’ Optimal Post-Fault Operation

Document Type : Research Article


1 Kermanshah Power Electrical Distribution Company (KPEDC), Kermanshah, Iran.

2 Electrical Engineering Department, Tehran University, Tehran, Iran


The reliability level of the distribution network is a judgment tool of the grid and protection design quality, the effectiveness of the fault management unit, and customers’ satisfaction. In this paper, a new approach is presented to evaluate common reliability indices namely ENS, SAIDI, SAIFI, MAIFIe, etc., while reliability improvement via optimal post-fault restoration describes the coordinated operation of various protection and control devices in temporary and permanent fault event conditions. Customers’ outage times are calculated considering different switching operation times to capture manual operation issues, e.g., traffic level, geographical issues, fuse replacements, etc. The optimal service restoration scheme being formulated in a mixed-integer linear programming (MILP) fashion is constrained to network technical limitations, e.g., line thermal capacity, load points voltage level, DG units’ parameters, and island operation. Performance of the proposed framework is verified in IEEE 33-bus test system.


Volume 1, Issue 1
March 2022
Pages 1-9
  • Receive Date: 23 November 2021
  • Revise Date: 05 February 2022
  • Accept Date: 24 February 2022
  • First Publish Date: 01 March 2022