Analysis method and control method of double-shaft excitation phase modifier and double-shaft excitation phase modifier

The invention discloses an analysis method and a control method of a double-shaft excitation phase modifier and the double-shaft excitation phase modifier. The method comprises the following steps: determining an increment equation of d-axis excitation and an increment equation of q-axis excitation of the double-axis excitation phase modifier according to a six-order model of the double-axis excitation phase modifier to be analyzed; determining an increment equation of each electrical quantity of the double-shaft excitation phase modifier when the double-shaft excitation phase modifier arranged at the grid connection point of the new energy plant station is in normal operation; determining an electromagnetic torque increment equation of the double-shaft excitation phase modifier; determining a system model in a transfer function form of the double-axis excitation phase modifier comprising a transfer function of a d-axis excitation regulator and a transfer function of a q-axis excitation regulator; and analyzi