| In order to improve the power flow control ability and accuracy of high proportion new energy distribution network, a novel single-core independent phase-shifting transformer(SCIPST) is presented, the configuration of voltage regulation winding turns is optimized. By independently controlling the two voltage regulating windings, SCIPST can independently adjust the phase and amplitude of line voltage. Compared with the traditional phase-shifting transformer, the function of independently adjusting voltage amplitude and the number of adjustable phase-shifting angles are increased, and the adjustment accuracy is improved. By adjusting the voltage phase and amplitude independently, the active and reactive power of the line can be adjusted independently in a certain range. The topology structure of SCIPST is introduced, the working principle is analyzed in detail and the control strategy is given. The simulation model of SCIPST is established, and the steady-state and transient performance of SCIPST regulating power flow and voltage of power grid is simulated and verified. A small-capacity SCIPST experimental model is developed, a power flow control characteristic test platform is built, and a control power flow simulation experiment is carried out. Simulative and experimental results prove the feasibility and effectiveness of the proposed SCIPST. |
