Operating Regions Comparison of VSC-based Custom Power Devices

Power quality disturbances have been faced through custom power devices such as static series compensator (SSC) and distribution static compensator (DSTATCOM), each one provide part of the compensation capabilities required. To provide total functionality, it is possible to operate both equipments mentioned before, or to use a unified power quality conditioner (UPQC) which integrates both topologies not only providing full compensation capabilities but also improving compensation characteristics. Evidence of the advantages of the UPQC and a recommendation of a modular sequential installation are presented