Field Programmable Analog Array (FPAA) based Shunt Active Filter controller

The presence of multiple harmonics in the power line due to various non-linear loads like adjustable speed drives, computers, fax machine, PLC´s, etc. requires high frequency switching of an active filter inverter so as to reduce the harmonic content at the point of common coupling (PCC) to be typically lower than 5% as specified by IEEE 519 harmonic standards. In this paper, the Field Programmable Analog Array (FPAA) based analog controller has been used to implement a Synchronous Reference Frame (SRF) controller algorithm for harmonic current extraction for Shunt Active Filter controller and the results are compared with the conventional digital implementation on Field Programmable Gate Array (FPGA). The FPAA based analog controller implementation proves to be faster than the digital FPGA implementation and can be a potential to replace analog controllers used for active filters.