Optimal Placement of Neutral Based GIC Blocking Devices In Distribution Systems

Abstract

Bulk power systems have multiple transformers and grounded neutral points that allow geomagnetically induced currents (GICs) to enter power systems through them. GIC phenomenon has a very large footprint (continents) which makes it infeasible to install GIC Blocking Devices (BD) at all the grounded point. So, this paper proposes an algorithm that helps to optimize the placement position of the neutral based BDs, the algorithm is tested using MATLAB on a distribution system with 11 grounding points. From the simulation results, the algorithm is found to be prompt and efficient in minimizing the number of BDs installed and in stabilizing the system during an event of GIC.