Three-Phase Four-Wire Static Synchronous Compensator

Recently, because of advancement in science and technology, factory equipments require better power quality than before, especially in three phase electric machinery where the negative sequence voltage and zero sequence voltage must not exceed 1.5% of positive sequence voltage. Hence, in this thesis, a static synchronous compensator is designed in order to have better voltage profile on the customer side.
A symmetrical component algorithm will be proposed for the design of a static synchronous compensator which comprises a three phase four-arm voltage-sourced pulse width modulated inverter with a dc capacitor. The control kernel of the STATCOM is implemented by a PC-based digital system with advanced PCL-1800 data acquisition boards.
Finally, based on the results from simulations and experiments, it can be concluded that voltage unbalance and voltage sag can be effectively reduced by the proposed STATCOM.