I am looking through the PowerModelsAnnex.jl module and particularly the src/model/opf.jl file. I noted that there is a build of a quadratically constrained opf in there? (i.e. build_qc_opf) Could I please confirm what specific formulation has been used, and the paper reference if available?
Would it by any chance be Kaarthik Sundar, Harsha Nagarajan, Sidhant Misra, Mowen Lu, Carleton Coffrin and Russell Bent “Optimization-Based Bound Tightening using a Strengthened QC-Relaxation of the Optimal Power Flow Problem”, 2018 arXiv:1809.04565.
@ccoffrin @sidhant172 @harshangrjn - any thoughts would be greatly appreciated?