distribution static compensator; Floquet multiplier; Neimark-Sacker bifurcation; non-linear oscillations; point common coupling; stability region Common coupling; Distribution static compensator; Floquet multiplier; Neimark-Sacker bifurcation; Nonlinear oscillation; stability region; DC power transmission; Electric potential; Frequency multiplying circuits; Mathematical models; Oscillators (mechanical); Stability; Voltage control; Voltage regulators; Bifurcation (mathematics)