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Table 6 Comparative analysis of conventional DOCR [20] and dual setting DOCR for 7-bus microgrid system

From: Coordination of dual setting overcurrent relays in microgrid with optimally determined relay characteristics for dual operating modes

Operating mode Relay characteristics Conventional DOCR operating time (s) using GA [20] Dual DOCR operating time (s) using GA Conventional DOCR operating time (s) using GWO Dual DOCR operating time (s) using GWO Reduction in total relay operating time using GA Reduction in total relay operating time using GWO
Grid-connected NI 7.2041 3.3877 7.2453 3.4045 52.97% 53.01%
  VI 2.4392 1.6825 2.5482 1.7402 31.02% 31.70%
  EI 1.6681 1.6124 1.7053 1.6139 3.39% 5.35%
  Mixed 1.6684 1.6065 1.6868 1.6103 3.71% 4.53%
Islanded NI 7.3148 3.9882 7.4868 3.9918 45.47% 46.68%
  VI 3.2457 1.7765 3.3625 1.7885 45.26% 46.81%
  EI 6.7142 1.6928 2.0911 1.7258 74.78% 17.46
  Mixed 2.0670 1.6345 2.0888 1.6459 20.92% 21.20%