Study on Grid-Connection of Powerformer

Grid-connection is the first link of electric energy transport, which will impact generator on safety and electric power grid steady. Powerformer can generate high voltage of the grid level and be connected to the infinite bus directly. In term of the powerformer prototype design feature, the relationship between the grid-connection conditions of generator and slippage voltage in different cases are analyzed in this paper. The effects of phase angle difference on surge current and surge torque during fault-synchronizing process are studied, the varying waveforms are given. And the comparative analysis with conventional machine is also discussed.