MODELING AND SIMULATING OF THE INVERTER IN THE CASCADE CONTROL SYSTEM WITH HIGH POWER FACTOR

摘要

The lower power factor of the common cascade control system affects its extension. How to increase the power factor of the cascade control system becomes the problem that must be solved, thereinto, improving the structure and the work condition of the inverter in the cascade control system is the key. The paper researches the work principle and the phase-change charateristic of the inverter in a new three-phase four-wire cascade control system with high power factor by simulation, builds the model of its inverse bridge and trigger, and studies the principle of improving the power factor by simulation. The results show that the active inverter can feed the inductive reactive power to the electric network, and the cascade control system with the inverter does get higher power factor. It has good extending and applying foreground.