Dynamic Simulation of Powerformer Under Loss of Excitation

Powerformer is a kind of new high-voltage generator. The simulation method of dynamic simulation analysis of Powerformer under loss of excitation base on MATLAB/simulink is proposed. Simulation model of exciting windings open circuit based on simulink is built, and simulation result is analyzed. The changing regular pattern of exciting electric current, stator current, stator terminal voltage, active power and reactive power are obtained through simulation. If Powerformer can be come into stabilized asynchronous running condition after loss of excitation, that offers time to clear fault. This reduces expense caused by its step-out and stoppage, and further improves operation reliability of generators and the electric power system.