Research on Impedance Conversion of Power Electronic Reactor

A new power electronic reactor is developed in order to get continuously variable reactance.The power electronic reactor is designed to have two windings which are different from the single winding structure of traditional reactor based on mechanical type.It consists of reactor converter and power electronic impedance converter.The current and impedance of primary winding are changed with the current and impedance of secondary winding which are controlled by the controller.This structure has many advantages,such as isolation high voltage from low voltage,reactance smooth change.It can be used in soft start of high voltage motor,harmonic suppression,reactive power compensation and has a wide field of application with good prospects.This paper describes the construction and topology of the power electronic reactor.Impedance conversion mechanism is analyzed in detail.The simulations of impedance conversion of power electronic reactor are made using Matlab/Simulink.The simulation results show that the theory of impedance conversion is correct.