Design of Driving and protection circuit for Submodule based on cascaded H-bridge STATCOM

Abstract

Driving and protection circuit is an important part of power electronics, which is related to safe and stable operation issues in the power electronics. The driving and protection circuit is designed for the cascaded H-bridge STATCOM in this paper. The circuit can realize flexible dead-time setting, operation status self-detection, fault priority protection and detailed fault status uploading. It can help to improve the reliability of STATCOM’s operation. Finally, the proposed circuit is tested and analysed by power electronic simulation software PSPICE (Simulation Program with IC Emphasis) and a series of experiments. Further studies showed that the proposed circuit can realize drive and control the H-bridge circuit, meanwhile it also can realize fast processing faults and have advantage of high reliability.