Optimizing multi-circuit transmission lines for single-phase auto-reclosing*

Author(s)

Acosta, Jhair S. ; Tavares, Maria C. ; Gole, Aniruddha M.

• Document type: Journal article
• Source: Electric Power Systems Research; v. 197, p. 8-pg., 2021-05-11.

Abstract

In this paper, novel multi-circuit transmission line (MCTL) designs with low secondary arc current (SAC) values are proposed. The Non-dominated Sorting Genetic Algorithm II (NSGA-II) was used to generate the optimized tower structures. The aim is to select the MCTL configuration that satisfies multiple objectives such as increased capacity, reduced cost, right-of-way (ROW), and tower height, while satisfying several constraints such as SAC limit, ampacity, electric field, etc. The objective function is formulated as a mathematical function of design variables such as sub-conductor position, phase arrangement, etc., and several constraints. Two-port theory is used to calculate the SAC resulting from different faults along the line, which is significantly faster compared with time-domain Electromagnetic Transient (EMT) simulations. Comparisons of MCTLs with and without SAC constraints are presented, clearly showing the importance of taking into account SAC limits during the optimization process. As a result, MCTL structures with SAC reductions of up-to 64% were obtained, indicating that the MCTL are able to successfully handle Single Phase Auto-Reclosing (SPAR). (AU)

• FAPESP's process: 19/16263-7 - Parallel simulation of electromagnetic transients and secondary arc mitigation in non-conventional multi-circuit multi-voltage transmission lines
• Grantee: Jhair Stivel Acosta Sarmiento
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate