A Proposal on Self-Healing Control Strategy for Smart Grid Protection Using Auto-Recloser
Gonga Sutradhar, Salma Sultana, Yasir Arafat · 2024
The global improvement of electrical infrastructures has led to a rise in popularity of smart grid technology. Smart grid technologies make it possible to integrate large-scale renewable energy, which helps to slow down global warming. One important characteristic of the smart grid is its self-healing capacity, which guarantees prompt power restoration and reduces lengthy outages brought on by transient faults. Self-healing techniques with auto-reclosers will be discussed in this paper. The recloser immediately disconnects the line in the event of a system malfunction, and it stays disconnected for 0.05 seconds. After that, it reconnects the line and maintains the connection for 0.05 seconds more. The system resumes normal operation if the issue is fixed within this time limit. The reclosers were created with Simulink in MATLAB. Only short-term faults were found to be resolved by this time, though. Due to this, a new timing strategy was put into place with a 0.05 second delay and a 0.12 second dead time to avoid long-term issues. This modification successfully stopped a variety of errors. Upon analysis of these results, the smart grid system’s self-healing design was successfully implemented.