Hardware and software design of a low DC-link voltage and wide compensation range thyristor controlled LC-coupling hybrid active power filter

This paper presents the hardware and software design of an 110V-5kVA three-phase three-wire thyristor controlled LC-coupling hybrid active power filter (TCLC-HAPF). Unlike the active power filters (APFs) and the hybrid active power filters (HAPFs), the TCLC-HAPF can operate at a low dc-link voltage with wide compensation range. In this paper, the design of the thyristor and IGBT drivers, the transducer with signal conditioning circuits, and the software of digital control system of the TCLC-HAPF experimental prototype is presented. Finally, the performance of the designed TCLC-HAPF hardware prototype is verified by experimental results.