Hardware realization of a dq based fault detection scheme for 3φ four-leg inverter
World Automation Congress Proceedings
Fault detection, hardware implementation, predictive current control, three phase four-leg inverter
The problem of fault effects in power converters has been an important issue in past years and fault detection is a mandatory step in fault-tolerant system design. This paper proposes a digital current control and a fault detection method for current sensors and their hardware implementations for a three phase four-leg inverter. The controller utilizes a predictive cost function to find the optimal switching state to apply to the inverter. The current sensors play an important role in control method. Any wrong information from sensors to controller can affect the whole system performance and cause damages. A fault diagnosis method is proposed to avoid any abnormal operation. This scheme is based on dq-transformation. Variation of d-axis or q-axis can be considered as detection criterion. Fixed-point computations of proposed methods are verified by computer simulations.
Eskandari, Mohammadreza; Ahmadi, Arash; Samadi, Mohammad Foad; and Saif, Mehrdad. (2016). Hardware realization of a dq based fault detection scheme for 3φ four-leg inverter. World Automation Congress Proceedings, 2016-October.