Optimal protection coordination for directional overcurrent relays in radial distribution networks with inverter-based distributed energy resources
The optimal setting of directional overcurrent relays ensures the reliable protection and fast fault clearance of radial distribution networks. However, the increasing proliferation of inverter-based distributed energy resources can result in protection coordination failure or high operating times o...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | International Journal of Electrical Power & Energy Systems |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525001735 |
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| Summary: | The optimal setting of directional overcurrent relays ensures the reliable protection and fast fault clearance of radial distribution networks. However, the increasing proliferation of inverter-based distributed energy resources can result in protection coordination failure or high operating times of directional overcurrent relays in radial distribution networks. This paper investigates the adverse impacts of grid-connected inverter-based distributed energy resources that adopt the active/reactive power control strategy on the protection speed, sensitivity and selectivity of directional overcurrent relays in radial distribution networks. A multi-objective optimal protection coordination model is formulated, which incorporates the protection performance of directional overcurrent relays, operation conditions and economics that result from the inverter-based distributed energy resources and power grids. The Pareto-front of the proposed optimal protection coordination problem is obtained by the improved multi-objective particle swarm optimization, where a time–space section evaluation utilizes the K-means clustering method to improve the computational efficiency. Furthermore, an analytic hierarchy process and criteria importance through intercrieria correlation weights-based technique for order preference by similarity to ideal solution algorithm is proposed to determine the optimal directional overcurrent relay settings. The developed coordinated framework is applied to a radial distribution network with inverter-based distributed energy resources in MATLAB and PSCAD/EMTDC simulation. The comparative analysis is provided and the effectiveness of the proposed scheme is validated through extensive case studies. |
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| ISSN: | 0142-0615 |