Implementation of Optimal Protection Coordination for Microgrids with Distributed Generations Using Quaternary Protection Scheme

<table class="table-group" id="tab12"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">DG operating status</td><td class="align_center" colspan="2">Total relay operating times (s)</td><td class="align_center" rowspan="2">Percentage of reduction</td></tr><tr class="thead"><td class="align_center">Conventional scheme</td><td class="align_center">Quaternary scheme</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Status 1</td><td class="align_center">8.399</td><td class="align_center">6.000</td><td class="align_center">28.56</td></tr><tr><td class="align_left">Status 2</td><td class="align_center">8.184</td><td class="align_center">6.211</td><td class="align_center">24.11</td></tr><tr><td class="align_left">Status 3</td><td class="align_center">8.723</td><td class="align_center">6.140</td><td class="align_center">29.61</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of the total relay operating times of different protection schemes in grid-connected microgrid.</div>

Journal of Electrical and Computer Engineering

tab12

Table 12

Table 12: Implementation of Optimal Protection Coordination for Microgrids with Distributed Generations Using Quaternary Protection Scheme 