Wind power can be delivered to the grid after rectification by a unidirectional AC/DC converter. However

the existing high-power rectification system has such shortcomings as high energy consumption

low rectification efficiency

serious harmonic pollution

low system power factor and absorption of a large amount of reactive power

which place a heavy burden on the power grid. In this paper

a new type of high-power rectifier topology with active filter and dynamic reactive power compensation is proposed

which can not only achieve sustaining adjustment of its rectified output voltage within a certain range

but also achieve the active filtering and reactive power compensation of the AC side system

filtering the harmonic component which is generated by the diode uncontroleld bridge itself

compensating partial reactive power and improving power quality of AC side system. Firstly

in this paper the composition of the topology and the closing/opening stataus of each switch under different operation modes are introduced. Then

such control methods as voltage control of submodule

reactive power compensation control and active filtering control are analyzed in detail and designed. They are analyzed through simulation example. The simulation result shows that the recfitier

at the same time of achieving the adjustment of its rectifying output voltage

can compensate the reactive power needed by the system and reduce the harmonic component injected from the high power recfitier to the power grid. Finally

based on the methematical relationship

the theoretical calculation formulas of switching loss and on-state loss of IGBT/Diode element of high power rectifier are derived

providing a reference for heat dissipation design