Using active power factor correction (PFC) boost rectifiers for an improved topology of static series compensators with no energy storage

Static series compensator (SSC) topologies including shunt connected power electronic rectifier with no energy storage have some potential advantages such as an extra saving and the ability exists to compensate longer dips. However, this topology has the disadvantage that the uncontrolled DC link is connected to the supply with a shunt rectifier during the fault, and more importantly, the conventional diode bridge rectifier (C-DBR) does not draw sinusoidal current from the supply and inject current harmonics to the network. In this study, an improved topology for the SSCs using a single-switch active power factor correction (A-PFC) boost rectifier is proposed. Single-phase SSC topologies with load side shunt connected C-DBR and A-PFC are compared by obtaining the results for the DC-link voltages, the supply currents and the load voltages. The results show that the proposed new topology offers solutions to problems of the topology including C-DBR such as supply current harmonics and uncontrolled DC-link voltage and so a considerable performance improvement is achieved by using the proposed SSC topology.