AC 3-phase connector with vector variables of dimension 3.
theta[2]: {relative angle, reference angle} v[3]: voltage vector i[3]: current vector
The following relations hold between absolute and relative angle\frequency:
theta[1]\der(theta[1]): angle\angular_frequency in frame rotating with reference angle theta[2] theta[2]\der(theta[2]): angle\angular_frequency of rotating reference frame
Therefore the absolute quantities are given by:
theta_abs = theta[1] + theta[2]: absolute angle der(theta_abs) = omega_abs: absolute angular frequency