Relaxation Schemes
In the literature this constraints are called the Lifted Nonlinear Cuts (LNCs)
PowerModels.relaxation_cos — Method.general relaxation of a cosine term, in -pi/2 to pi/2
PowerModels.relaxation_cos_on_off — Method.general relaxation of a cosine term, in -pi/2 to pi/2
PowerModels.relaxation_sin — Method.general relaxation of a sine term, in -pi/2 to pi/2
PowerModels.relaxation_sin_on_off — Method.general relaxation of a sine term, in -pi/2 to pi/2