Open-Circuit Switch-Fault Tolerant Control of a Modified Boost DC–DC Converter for Alternative Energy Systems

This paper presents switch fault detection and compensation control schemes for a modified dc-dc converter that relocates a diode location. The proposed fault detection and compensation control schemes are applicable to various energy generation systems that include energy storage. A fault detection index has been introduced to detect an open switch fault in the modified converter structure, and a compensation control method based on a mixed switching strategy has been developed. The fault-tolerant control method along with the detection scheme can make a system return to work even under a switch fault. The proposed schemes have been tested and verified both by the simulations and by experiments using a TMS320F28335 DSP. The results will significantly improve the reliability of alternative energy generation systems against open switch faults.