ISSN ONLINE(2278-8875) PRINT (2320-3765)

All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Research Article Open Access

Cross-Correlation Based Open-Switch Fault Detection Method in Parallel Inverters System

Abstract

This paper proposes a new detection method of the open-switch fault, this method is based on the crosscorrelation of the zero-sequence current in N-parallel inverters system. Under the open-switch fault conditions, the appearance of the circulating currents between the faulty and healthy inverters, is inevitable. The zero-sequence current is used to identify the faulty open-circuited switch by the crosscorrelation. The line current of the faulty phase, is so small or nearly zero, while the resulting zero-sequence current will be synchronized with a reference current which is corresponding to the faulty phase current. So there is a significant correlation of the faulty phase by its reference and the resulting zero-sequence current. While the waveform between the healthy phases and the resulting zero-sequence current show a significant irrelevance. By taking the advantage of this feature between the healthy, faulty and zero-sequence current, the detection method can correctly select out the faulty open-circuited switch. The effectiveness of the proposed open-switch fault detection algorithm is theoretically analyzed and validated by the simulations and the experiments.

Ahmed Shahin

To read the full article Download Full Article